fix(waitlist): add delay before email to avoid rate limit

Co-authored-by: Ona <no-reply@ona.com>

.claude/skills/gpg-commit-signing/SKILL.md

@@ -0,0 +1,43 @@
+---
+name: gpg-commit-signing
+description: Sign git commits with GPG in non-interactive environments. Use when committing code and the `GPG_PRIVATE_KEY_PASSPHRASE` environment variable is available. Triggers on "commit", "sign commit", "GPG", "git commit -S", or any git operation requiring signed commits.
+---
+
+# GPG Commit Signing
+
+Sign commits in headless/non-interactive environments where `/dev/tty` is unavailable.
+
+## Workflow
+
+1. Check whether `GPG_PRIVATE_KEY_PASSPHRASE` is set:
+
+   ```bash
+   test -n "$GPG_PRIVATE_KEY_PASSPHRASE" && echo "available" || echo "not set"
+   ```
+
+   If not set, skip signing — commit without `-S`.
+
+2. Try a direct signed commit first — the environment may already have loopback pinentry configured:
+
+   ```bash
+   git commit -S -m "message"
+   ```
+
+   If this succeeds, no further steps are needed.
+
+3. If step 2 fails with a `/dev/tty` error, use `--pinentry-mode loopback` via a wrapper script:
+
+   ```bash
+   printf '#!/bin/sh\ngpg --batch --pinentry-mode loopback --passphrase "$GPG_PRIVATE_KEY_PASSPHRASE" "$@"\n' > /tmp/gpg-sign.sh
+   chmod +x /tmp/gpg-sign.sh
+   git -c gpg.program=/tmp/gpg-sign.sh commit -S -m "message"
+   rm /tmp/gpg-sign.sh
+   ```
+
+   This passes the passphrase directly to gpg on each signing invocation, bypassing the need for a configured gpg-agent.
+
+## Anti-patterns
+
+- Do not echo or log `GPG_PRIVATE_KEY_PASSPHRASE`.
+- Do not commit without `-S` when the passphrase is available — the project expects signed commits.
+- Do not leave wrapper scripts on disk after committing.

apps/aris-backend/.env.example

@@ -7,6 +7,11 @@ BETTER_AUTH_SECRET=
 # Base URL of the backend
 BETTER_AUTH_URL=http://localhost:3000
 
+# OpenRouter (LLM feed enhancement)
+OPENROUTER_API_KEY=
+# Optional: override the default model (default: openai/gpt-4.1-mini)
+# OPENROUTER_MODEL=openai/gpt-4.1-mini
+
 # Apple WeatherKit credentials
 WEATHERKIT_PRIVATE_KEY=
 WEATHERKIT_KEY_ID=

apps/aris-backend/package.json

@@ -10,9 +10,12 @@
 	},
 	"dependencies": {
 		"@aris/core": "workspace:*",
+		"@aris/source-caldav": "workspace:*",
+		"@aris/source-google-calendar": "workspace:*",
 		"@aris/source-location": "workspace:*",
 		"@aris/source-tfl": "workspace:*",
 		"@aris/source-weatherkit": "workspace:*",
+		"@openrouter/sdk": "^0.9.11",
 		"arktype": "^2.1.29",
 		"better-auth": "^1",
 		"hono": "^4",

apps/aris-backend/src/auth/session-middleware.ts

@@ -1,4 +1,4 @@
-import type { Context, Next } from "hono"
+import type { Context, MiddlewareHandler, Next } from "hono"
 
 import type { AuthSession, AuthUser } from "./session.ts"
 
@@ -9,6 +9,10 @@ export interface SessionVariables {
 	session: AuthSession | null
 }
 
+export type AuthSessionEnv = { Variables: SessionVariables }
+
+export type AuthSessionMiddleware = MiddlewareHandler<AuthSessionEnv>
+
 declare module "hono" {
 	interface ContextVariableMap extends SessionVariables {}
 }
@@ -55,3 +59,18 @@ export async function getSessionFromHeaders(
 	const session = await auth.api.getSession({ headers })
 	return session
 }
+
+/**
+ * Test-only middleware that injects a fake user and session.
+ * Pass userId to simulate an authenticated request, or omit to get 401.
+ */
+export function mockAuthSessionMiddleware(userId?: string): AuthSessionMiddleware {
+	return async (c: Context, next: Next): Promise<Response | void> => {
+		if (!userId) {
+			return c.json({ error: "Unauthorized" }, 401)
+		}
+		c.set("user", { id: userId } as AuthUser)
+		c.set("session", { id: "mock-session" } as AuthSession)
+		await next()
+	}
+}

apps/aris-backend/src/enhancement/enhance-feed.ts

@@ -0,0 +1,51 @@
+import type { FeedItem } from "@aris/core"
+
+import type { LlmClient } from "./llm-client.ts"
+
+import { mergeEnhancement } from "./merge.ts"
+import { buildPrompt, hasUnfilledSlots } from "./prompt-builder.ts"
+
+/** Takes feed items, returns enhanced feed items. */
+export type FeedEnhancer = (items: FeedItem[]) => Promise<FeedItem[]>
+
+export interface FeedEnhancerConfig {
+	client: LlmClient
+	/** Defaults to Date.now — override for testing */
+	clock?: () => Date
+}
+
+/**
+ * Creates a FeedEnhancer that uses the provided LlmClient.
+ *
+ * Skips the LLM call when no items have unfilled slots.
+ * Returns items unchanged on LLM failure.
+ */
+export function createFeedEnhancer(config: FeedEnhancerConfig): FeedEnhancer {
+	const { client } = config
+	const clock = config.clock ?? (() => new Date())
+
+	return async function enhanceFeed(items) {
+		if (!hasUnfilledSlots(items)) {
+			return items
+		}
+
+		const currentTime = clock()
+		const { systemPrompt, userMessage } = buildPrompt(items, currentTime)
+
+		let result
+		try {
+			result = await client.enhance({ systemPrompt, userMessage })
+		} catch (err) {
+			console.error("[enhancement] LLM call failed:", err)
+			result = null
+		}
+
+		if (!result) {
+			return items
+		}
+
+		return mergeEnhancement(items, result, currentTime)
+	}
+}
+
+

apps/aris-backend/src/enhancement/llm-client.ts

@@ -0,0 +1,71 @@
+import { OpenRouter } from "@openrouter/sdk"
+
+import type { EnhancementResult } from "./schema.ts"
+
+import { enhancementResultJsonSchema, parseEnhancementResult } from "./schema.ts"
+
+const DEFAULT_MODEL = "openai/gpt-4.1-mini"
+const DEFAULT_TIMEOUT_MS = 30_000
+
+export interface LlmClientConfig {
+	apiKey: string
+	model?: string
+	timeoutMs?: number
+}
+
+export interface LlmClientRequest {
+	systemPrompt: string
+	userMessage: string
+}
+
+export interface LlmClient {
+	enhance(request: LlmClientRequest): Promise<EnhancementResult | null>
+}
+
+/**
+ * Creates a reusable LLM client backed by OpenRouter.
+ * The OpenRouter SDK instance is created once and reused across calls.
+ */
+export function createLlmClient(config: LlmClientConfig): LlmClient {
+	const client = new OpenRouter({
+		apiKey: config.apiKey,
+		timeoutMs: config.timeoutMs ?? DEFAULT_TIMEOUT_MS,
+	})
+	const model = config.model ?? DEFAULT_MODEL
+
+	return {
+		async enhance(request) {
+			const response = await client.chat.send({
+				chatGenerationParams: {
+					model,
+					messages: [
+						{ role: "system" as const, content: request.systemPrompt },
+						{ role: "user" as const, content: request.userMessage },
+					],
+					responseFormat: {
+						type: "json_schema" as const,
+						jsonSchema: {
+							name: "enhancement_result",
+							strict: true,
+							schema: enhancementResultJsonSchema,
+						},
+					},
+					stream: false,
+				},
+			})
+
+			const content = response.choices?.[0]?.message?.content
+			if (typeof content !== "string") {
+				console.warn("[enhancement] LLM returned no content in response")
+				return null
+			}
+
+			const result = parseEnhancementResult(content)
+			if (!result) {
+				console.warn("[enhancement] Failed to parse LLM response:", content)
+			}
+
+			return result
+		},
+	}
+}

apps/aris-backend/src/enhancement/merge.test.ts

@@ -0,0 +1,150 @@
+import type { FeedItem } from "@aris/core"
+
+import { describe, expect, test } from "bun:test"
+
+import type { EnhancementResult } from "./schema.ts"
+
+import { mergeEnhancement } from "./merge.ts"
+
+function makeItem(overrides: Partial<FeedItem> = {}): FeedItem {
+	return {
+		id: "item-1",
+		type: "test",
+		timestamp: new Date("2025-01-01T00:00:00Z"),
+		data: { value: 42 },
+		...overrides,
+	}
+}
+
+const now = new Date("2025-06-01T12:00:00Z")
+
+describe("mergeEnhancement", () => {
+	test("fills matching slots", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "Weather insight", content: null },
+			},
+		})
+		const result: EnhancementResult = {
+			slotFills: {
+				"item-1": { insight: "Rain after 3pm" },
+			},
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged).toHaveLength(1)
+		expect(merged[0]!.slots!.insight!.content).toBe("Rain after 3pm")
+		// Description preserved
+		expect(merged[0]!.slots!.insight!.description).toBe("Weather insight")
+	})
+
+	test("does not mutate original items", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "test", content: null },
+			},
+		})
+		const result: EnhancementResult = {
+			slotFills: { "item-1": { insight: "filled" } },
+			syntheticItems: [],
+		}
+
+		mergeEnhancement([item], result, now)
+
+		expect(item.slots!.insight!.content).toBeNull()
+	})
+
+	test("ignores fills for non-existent items", () => {
+		const item = makeItem()
+		const result: EnhancementResult = {
+			slotFills: { "non-existent": { insight: "text" } },
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged).toHaveLength(1)
+		expect(merged[0]!.id).toBe("item-1")
+	})
+
+	test("ignores fills for non-existent slots", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "test", content: null },
+			},
+		})
+		const result: EnhancementResult = {
+			slotFills: { "item-1": { "non-existent-slot": "text" } },
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged[0]!.slots!.insight!.content).toBeNull()
+	})
+
+	test("skips null fills", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "test", content: null },
+			},
+		})
+		const result: EnhancementResult = {
+			slotFills: { "item-1": { insight: null } },
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged[0]!.slots!.insight!.content).toBeNull()
+	})
+
+	test("passes through items without slots unchanged", () => {
+		const item = makeItem()
+		const result: EnhancementResult = {
+			slotFills: {},
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged[0]).toBe(item)
+	})
+
+	test("appends synthetic items with backfilled fields", () => {
+		const item = makeItem()
+		const result: EnhancementResult = {
+			slotFills: {},
+			syntheticItems: [
+				{
+					id: "briefing-morning",
+					type: "briefing",
+					text: "Light afternoon ahead.",
+				},
+			],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged).toHaveLength(2)
+		expect(merged[1]!.id).toBe("briefing-morning")
+		expect(merged[1]!.type).toBe("briefing")
+		expect(merged[1]!.timestamp).toEqual(now)
+		expect(merged[1]!.data).toEqual({ text: "Light afternoon ahead." })
+	})
+
+	test("handles empty enhancement result", () => {
+		const item = makeItem()
+		const result: EnhancementResult = {
+			slotFills: {},
+			syntheticItems: [],
+		}
+
+		const merged = mergeEnhancement([item], result, now)
+
+		expect(merged).toHaveLength(1)
+		expect(merged[0]).toBe(item)
+	})
+})

apps/aris-backend/src/enhancement/merge.ts

@@ -0,0 +1,41 @@
+import type { FeedItem } from "@aris/core"
+
+import type { EnhancementResult } from "./schema.ts"
+
+/**
+ * Merges an EnhancementResult into feed items.
+ *
+ * - Writes slot content from slotFills into matching items
+ * - Appends synthetic items to the list
+ * - Returns a new array (no mutation)
+ * - Ignores fills for items/slots that don't exist
+ */
+export function mergeEnhancement(items: FeedItem[], result: EnhancementResult, currentTime: Date): FeedItem[] {
+	const merged = items.map((item) => {
+		const fills = result.slotFills[item.id]
+		if (!fills || !item.slots) return item
+
+		const mergedSlots = { ...item.slots }
+		let changed = false
+
+		for (const [slotName, content] of Object.entries(fills)) {
+			if (slotName in mergedSlots && content !== null) {
+				mergedSlots[slotName] = { ...mergedSlots[slotName]!, content }
+				changed = true
+			}
+		}
+
+		return changed ? { ...item, slots: mergedSlots } : item
+	})
+
+	for (const synthetic of result.syntheticItems) {
+		merged.push({
+			id: synthetic.id,
+			type: synthetic.type,
+			timestamp: currentTime,
+			data: { text: synthetic.text },
+		})
+	}
+
+	return merged
+}

apps/aris-backend/src/enhancement/prompt-builder.test.ts

@@ -0,0 +1,167 @@
+import type { FeedItem } from "@aris/core"
+
+import { describe, expect, test } from "bun:test"
+
+import { buildPrompt, hasUnfilledSlots } from "./prompt-builder.ts"
+
+function makeItem(overrides: Partial<FeedItem> = {}): FeedItem {
+	return {
+		id: "item-1",
+		type: "test",
+		timestamp: new Date("2025-01-01T00:00:00Z"),
+		data: { value: 42 },
+		...overrides,
+	}
+}
+
+function parseUserMessage(userMessage: string): Record<string, unknown> {
+	return JSON.parse(userMessage)
+}
+
+describe("hasUnfilledSlots", () => {
+	test("returns false for items without slots", () => {
+		expect(hasUnfilledSlots([makeItem()])).toBe(false)
+	})
+
+	test("returns false for items with all slots filled", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "test", content: "filled" },
+			},
+		})
+		expect(hasUnfilledSlots([item])).toBe(false)
+	})
+
+	test("returns true when at least one slot is unfilled", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "test", content: null },
+			},
+		})
+		expect(hasUnfilledSlots([item])).toBe(true)
+	})
+
+	test("returns false for empty array", () => {
+		expect(hasUnfilledSlots([])).toBe(false)
+	})
+})
+
+describe("buildPrompt", () => {
+	test("puts items with unfilled slots in items", () => {
+		const item = makeItem({
+			slots: {
+				insight: { description: "Weather insight", content: null },
+				filled: { description: "Already done", content: "done" },
+			},
+		})
+
+		const { userMessage } = buildPrompt([item], new Date("2025-06-01T12:00:00Z"))
+		const parsed = parseUserMessage(userMessage)
+
+		expect(parsed.items).toHaveLength(1)
+		expect((parsed.items as Array<Record<string, unknown>>)[0]!.id).toBe("item-1")
+		expect((parsed.items as Array<Record<string, unknown>>)[0]!.slots).toEqual({ insight: "Weather insight" })
+		expect((parsed.items as Array<Record<string, unknown>>)[0]!.type).toBeUndefined()
+		expect(parsed.context).toHaveLength(0)
+	})
+
+	test("puts slotless items in context", () => {
+		const withSlots = makeItem({
+			id: "with-slots",
+			slots: { insight: { description: "test", content: null } },
+		})
+		const withoutSlots = makeItem({ id: "no-slots" })
+
+		const { userMessage } = buildPrompt([withSlots, withoutSlots], new Date("2025-06-01T12:00:00Z"))
+		const parsed = parseUserMessage(userMessage)
+
+		expect(parsed.items).toHaveLength(1)
+		expect((parsed.items as Array<Record<string, unknown>>)[0]!.id).toBe("with-slots")
+		expect(parsed.context).toHaveLength(1)
+		expect((parsed.context as Array<Record<string, unknown>>)[0]!.id).toBe("no-slots")
+	})
+
+	test("includes time in ISO format", () => {
+		const { userMessage } = buildPrompt([], new Date("2025-06-01T12:00:00Z"))
+		const parsed = parseUserMessage(userMessage)
+
+		expect(parsed.time).toBe("2025-06-01T12:00:00.000Z")
+	})
+
+	test("system prompt is non-empty", () => {
+		const { systemPrompt } = buildPrompt([], new Date())
+		expect(systemPrompt.length).toBeGreaterThan(0)
+	})
+
+	test("includes schedule in system prompt", () => {
+		const calEvent = makeItem({
+			id: "cal-1",
+			type: "caldav-event",
+			data: {
+				title: "Team standup",
+				startDate: "2025-06-01T10:00:00Z",
+				endDate: "2025-06-01T10:30:00Z",
+				isAllDay: false,
+				location: null,
+			},
+			slots: {
+				insight: { description: "test", content: null },
+			},
+		})
+
+		const { systemPrompt } = buildPrompt([calEvent], new Date("2025-06-01T12:00:00Z"))
+
+		expect(systemPrompt).toContain("Schedule:\n")
+		expect(systemPrompt).toContain("Team standup")
+		expect(systemPrompt).toContain("10:00")
+	})
+
+	test("includes location in schedule", () => {
+		const calEvent = makeItem({
+			id: "cal-1",
+			type: "caldav-event",
+			data: {
+				title: "Therapy",
+				startDate: "2025-06-02T18:00:00Z",
+				endDate: "2025-06-02T19:00:00Z",
+				isAllDay: false,
+				location: "92 Tooley Street, London",
+			},
+		})
+
+		const { systemPrompt } = buildPrompt([calEvent], new Date("2025-06-01T12:00:00Z"))
+
+		expect(systemPrompt).toContain("Therapy @ 92 Tooley Street, London")
+	})
+
+	test("includes week calendar but omits schedule when no calendar items", () => {
+		const weatherItem = makeItem({
+			type: "weather-current",
+			data: { temperature: 14 },
+		})
+
+		const { systemPrompt } = buildPrompt([weatherItem], new Date("2025-06-01T12:00:00Z"))
+
+		expect(systemPrompt).toContain("Week:")
+		expect(systemPrompt).not.toContain("Schedule:")
+	})
+
+	test("user message is pure JSON", () => {
+		const calEvent = makeItem({
+			id: "cal-1",
+			type: "caldav-event",
+			data: {
+				title: "Budget Review",
+				startTime: "2025-06-01T14:00:00Z",
+				endTime: "2025-06-01T15:00:00Z",
+				isAllDay: false,
+				location: "https://meet.google.com/abc",
+			},
+		})
+
+		const { userMessage } = buildPrompt([calEvent], new Date("2025-06-01T12:00:00Z"))
+
+		expect(userMessage.startsWith("{")).toBe(true)
+		expect(() => JSON.parse(userMessage)).not.toThrow()
+	})
+})

apps/aris-backend/src/enhancement/prompt-builder.ts

@@ -0,0 +1,218 @@
+import type { FeedItem } from "@aris/core"
+
+import { CalDavFeedItemType } from "@aris/source-caldav"
+import { CalendarFeedItemType } from "@aris/source-google-calendar"
+
+import systemPromptBase from "./prompts/system.txt"
+
+const CALENDAR_ITEM_TYPES = new Set<string>([
+	CalDavFeedItemType.Event,
+	CalendarFeedItemType.Event,
+	CalendarFeedItemType.AllDay,
+])
+
+/**
+ * Builds the system prompt and user message for the enhancement harness.
+ *
+ * Includes a pre-computed mini calendar so the LLM doesn't have to
+ * parse timestamps to understand the user's schedule.
+ */
+export function buildPrompt(
+	items: FeedItem[],
+	currentTime: Date,
+): { systemPrompt: string; userMessage: string } {
+	const schedule = buildSchedule(items, currentTime)
+
+	const enhanceItems: Array<{
+		id: string
+		data: Record<string, unknown>
+		slots: Record<string, string>
+	}> = []
+	const contextItems: Array<{
+		id: string
+		type: string
+		data: Record<string, unknown>
+	}> = []
+
+	for (const item of items) {
+		const hasUnfilledSlots =
+			item.slots &&
+			Object.values(item.slots).some((slot) => slot.content === null)
+
+		if (hasUnfilledSlots) {
+			enhanceItems.push({
+				id: item.id,
+				data: item.data,
+				slots: Object.fromEntries(
+					Object.entries(item.slots!)
+						.filter(([, slot]) => slot.content === null)
+						.map(([name, slot]) => [name, slot.description]),
+				),
+			})
+		} else {
+			contextItems.push({
+				id: item.id,
+				type: item.type,
+				data: item.data,
+			})
+		}
+	}
+
+	const userMessage = JSON.stringify({
+		time: currentTime.toISOString(),
+		items: enhanceItems,
+		context: contextItems,
+	})
+
+	const weekCalendar = buildWeekCalendar(currentTime)
+	let systemPrompt = systemPromptBase
+	systemPrompt += `\n\nWeek:\n${weekCalendar}`
+	if (schedule) {
+		systemPrompt += `\n\nSchedule:\n${schedule}`
+	}
+
+	return { systemPrompt, userMessage }
+}
+
+/**
+ * Returns true if any item has at least one unfilled slot.
+ */
+export function hasUnfilledSlots(items: FeedItem[]): boolean {
+	return items.some(
+		(item) =>
+			item.slots &&
+			Object.values(item.slots).some((slot) => slot.content === null),
+	)
+}
+
+// -- Helpers --
+
+interface CalendarEntry {
+	date: Date
+	title: string
+	location: string | null
+	isAllDay: boolean
+	startTime: Date
+	endTime: Date
+}
+
+function toValidDate(value: unknown): Date | null {
+	if (value instanceof Date) return Number.isNaN(value.getTime()) ? null : value
+	if (typeof value === "string" || typeof value === "number") {
+		const date = new Date(value)
+		return Number.isNaN(date.getTime()) ? null : date
+	}
+	return null
+}
+
+function extractCalendarEntry(item: FeedItem): CalendarEntry | null {
+	if (!CALENDAR_ITEM_TYPES.has(item.type)) return null
+
+	const d = item.data
+	const title = d.title
+	if (typeof title !== "string" || !title) return null
+
+	// CalDAV uses startDate/endDate, Google Calendar uses startTime/endTime
+	const startTime = toValidDate(d.startDate ?? d.startTime)
+	if (!startTime) return null
+
+	const endTime = toValidDate(d.endDate ?? d.endTime) ?? startTime
+
+	return {
+		date: startTime,
+		title,
+		location: typeof d.location === "string" ? d.location : null,
+		isAllDay: typeof d.isAllDay === "boolean" ? d.isAllDay : false,
+		startTime,
+		endTime,
+	}
+}
+
+const DAYS = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"] as const
+const MONTHS = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] as const
+
+function pad2(n: number): string {
+	return n.toString().padStart(2, "0")
+}
+
+function formatTime(date: Date): string {
+	return `${pad2(date.getUTCHours())}:${pad2(date.getUTCMinutes())}`
+}
+
+function formatDayShort(date: Date): string {
+	return `${DAYS[date.getUTCDay()]}, ${date.getUTCDate()} ${MONTHS[date.getUTCMonth()]}`
+}
+
+function formatDayLabel(date: Date, currentTime: Date): string {
+	const currentDay = Date.UTC(currentTime.getUTCFullYear(), currentTime.getUTCMonth(), currentTime.getUTCDate())
+	const targetDay = Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate())
+	const diffDays = Math.round((targetDay - currentDay) / (1000 * 60 * 60 * 24))
+
+	const dayName = formatDayShort(date)
+
+	if (diffDays === 0) return `Today: ${dayName}`
+	if (diffDays === 1) return `Tomorrow: ${dayName}`
+	return dayName
+}
+
+/**
+ * Builds a week overview mapping day names to dates,
+ * so the LLM can easily match ISO timestamps to days.
+ */
+function buildWeekCalendar(currentTime: Date): string {
+	const lines: string[] = []
+	for (let i = 0; i < 7; i++) {
+		const date = new Date(currentTime)
+		date.setUTCDate(date.getUTCDate() + i)
+		const label = i === 0 ? "Today" : i === 1 ? "Tomorrow" : ""
+		const dayStr = formatDayShort(date)
+		const iso = date.toISOString().slice(0, 10)
+		const prefix = label ? `${label}: ` : ""
+		lines.push(`${prefix}${dayStr} = ${iso}`)
+	}
+	return lines.join("\n")
+}
+
+/**
+ * Builds a compact text calendar from all calendar-type items.
+ * Groups events by day relative to currentTime.
+ */
+function buildSchedule(items: FeedItem[], currentTime: Date): string {
+	const entries: CalendarEntry[] = []
+	for (const item of items) {
+		const entry = extractCalendarEntry(item)
+		if (entry) entries.push(entry)
+	}
+
+	if (entries.length === 0) return ""
+
+	entries.sort((a, b) => a.startTime.getTime() - b.startTime.getTime())
+
+	const byDay = new Map<string, CalendarEntry[]>()
+	for (const entry of entries) {
+		const key = entry.date.toISOString().slice(0, 10)
+		const group = byDay.get(key)
+		if (group) {
+			group.push(entry)
+		} else {
+			byDay.set(key, [entry])
+		}
+	}
+
+	const lines: string[] = []
+	for (const [, dayEntries] of byDay) {
+		lines.push(formatDayLabel(dayEntries[0]!.startTime, currentTime))
+		for (const entry of dayEntries) {
+			if (entry.isAllDay) {
+				const loc = entry.location ? ` @ ${entry.location}` : ""
+				lines.push(`  all day  ${entry.title}${loc}`)
+			} else {
+				const timeRange = `${formatTime(entry.startTime)}–${formatTime(entry.endTime)}`
+				const loc = entry.location ? ` @ ${entry.location}` : ""
+				lines.push(`  ${timeRange}  ${entry.title}${loc}`)
+			}
+		}
+	}
+
+	return lines.join("\n")
+}

apps/aris-backend/src/enhancement/prompts/system.txt

@@ -0,0 +1,21 @@
+You are ARIS, a personal assistant. You enhance a user's feed by filling slots and optionally generating synthetic items.
+
+The user message is a JSON object with:
+- "items": feed items with data and named slots to fill. Each slot has a description of what to write.
+- "context": other feed items (no slots) for cross-source reasoning.
+- "time": current ISO timestamp.
+
+Your output has two fields:
+- "slotFills": map of item ID → slot name → short text (or null if you can't fill it or cannot provide answer). Each item ID appears ONCE with ALL its slots in a single object.
+- "syntheticItems": array of { id, type, text } for new items (briefings, nudges, insights). Only when genuinely useful and when not redundant.
+
+Rules:
+- DO NOT USE EMDASH OR DASH OR ATTEMPT TO USE SYMBOLS TO CIRCUMVENT THIS RULE.
+- One sentence per slot. Two max if absolutely necessary. Be direct.
+- Say "I" not "we."
+- Hedge when inferring. Don't state guesses as facts.
+- Use the week and schedule below to understand when events happen. Match weather data to the correct date.
+- Look for connections across items.
+- Don't pad — return null for slots you can't meaningfully fill, and skip synthetic items if there's nothing useful to add.
+- Never fabricate information not present in the feed. If you don't have data to support a fill, return null.
+- Read each slot's description carefully — it defines when to return null.

apps/aris-backend/src/enhancement/schema.test.ts

@@ -0,0 +1,176 @@
+import { describe, expect, test } from "bun:test"
+
+import {
+	emptyEnhancementResult,
+	enhancementResultJsonSchema,
+	parseEnhancementResult,
+} from "./schema.ts"
+
+describe("parseEnhancementResult", () => {
+	test("parses valid result", () => {
+		const input = JSON.stringify({
+			slotFills: {
+				"weather-1": {
+					insight: "Rain after 3pm",
+					"cross-source": null,
+				},
+			},
+			syntheticItems: [
+				{
+					id: "briefing-morning",
+					type: "briefing",
+					text: "Light afternoon ahead.",
+				},
+			],
+		})
+
+		const result = parseEnhancementResult(input)
+
+		expect(result).not.toBeNull()
+		expect(result!.slotFills["weather-1"]!.insight).toBe("Rain after 3pm")
+		expect(result!.slotFills["weather-1"]!["cross-source"]).toBeNull()
+		expect(result!.syntheticItems).toHaveLength(1)
+		expect(result!.syntheticItems[0]!.id).toBe("briefing-morning")
+		expect(result!.syntheticItems[0]!.text).toBe("Light afternoon ahead.")
+	})
+
+	test("parses empty result", () => {
+		const input = JSON.stringify({
+			slotFills: {},
+			syntheticItems: [],
+		})
+
+		const result = parseEnhancementResult(input)
+
+		expect(result).not.toBeNull()
+		expect(Object.keys(result!.slotFills)).toHaveLength(0)
+		expect(result!.syntheticItems).toHaveLength(0)
+	})
+
+	test("returns null for invalid JSON", () => {
+		expect(parseEnhancementResult("not json")).toBeNull()
+	})
+
+	test("returns null for non-object", () => {
+		expect(parseEnhancementResult('"hello"')).toBeNull()
+		expect(parseEnhancementResult("42")).toBeNull()
+		expect(parseEnhancementResult("null")).toBeNull()
+	})
+
+	test("returns null when slotFills is missing", () => {
+		const input = JSON.stringify({ syntheticItems: [] })
+		expect(parseEnhancementResult(input)).toBeNull()
+	})
+
+	test("returns null when syntheticItems is missing", () => {
+		const input = JSON.stringify({ slotFills: {} })
+		expect(parseEnhancementResult(input)).toBeNull()
+	})
+
+	test("returns null when slotFills has non-string values", () => {
+		const input = JSON.stringify({
+			slotFills: { "item-1": { slot: 42 } },
+			syntheticItems: [],
+		})
+		expect(parseEnhancementResult(input)).toBeNull()
+	})
+
+	test("returns null when syntheticItem is missing required fields", () => {
+		const input = JSON.stringify({
+			slotFills: {},
+			syntheticItems: [{ id: "x" }],
+		})
+		expect(parseEnhancementResult(input)).toBeNull()
+	})
+})
+
+describe("emptyEnhancementResult", () => {
+	test("returns empty slotFills and syntheticItems", () => {
+		const result = emptyEnhancementResult()
+		expect(result.slotFills).toEqual({})
+		expect(result.syntheticItems).toEqual([])
+	})
+})
+
+describe("schema sync", () => {
+	const referencePayloads = [
+		{
+			name: "full payload with null slot fill",
+			payload: {
+				slotFills: {
+					"weather-1": { insight: "Rain after 3pm", crossSource: null },
+					"cal-2": { summary: "Busy morning" },
+				},
+				syntheticItems: [
+					{ id: "briefing-morning", type: "briefing", text: "Light day ahead." },
+					{ id: "nudge-umbrella", type: "nudge", text: "Bring an umbrella." },
+				],
+			},
+		},
+		{
+			name: "empty collections",
+			payload: { slotFills: {}, syntheticItems: [] },
+		},
+		{
+			name: "slot fills only",
+			payload: {
+				slotFills: { "item-1": { slot: "filled" } },
+				syntheticItems: [],
+			},
+		},
+		{
+			name: "synthetic items only",
+			payload: {
+				slotFills: {},
+				syntheticItems: [{ id: "insight-1", type: "insight", text: "Something." }],
+			},
+		},
+	]
+
+	for (const { name, payload } of referencePayloads) {
+		test(`arktype and JSON Schema agree on: ${name}`, () => {
+			// arktype accepts it
+			const parsed = parseEnhancementResult(JSON.stringify(payload))
+			expect(parsed).not.toBeNull()
+
+			// JSON Schema structure matches
+			const jsonSchema = enhancementResultJsonSchema
+			expect(Object.keys(jsonSchema.properties).sort()).toEqual(
+				Object.keys(payload).sort(),
+			)
+			expect([...jsonSchema.required].sort()).toEqual(Object.keys(payload).sort())
+
+			// syntheticItems item schema has the right required fields
+			const itemSchema = jsonSchema.properties.syntheticItems.items
+			expect([...itemSchema.required].sort()).toEqual(["id", "text", "type"])
+
+			// Verify each synthetic item has exactly the fields the JSON Schema expects
+			for (const item of payload.syntheticItems) {
+				expect(Object.keys(item).sort()).toEqual([...itemSchema.required].sort())
+			}
+		})
+	}
+
+	test("JSON Schema rejects what arktype rejects: missing required field", () => {
+		// Missing syntheticItems
+		expect(parseEnhancementResult(JSON.stringify({ slotFills: {} }))).toBeNull()
+
+		// JSON Schema also requires it
+		expect(enhancementResultJsonSchema.required).toContain("syntheticItems")
+	})
+
+	test("JSON Schema rejects what arktype rejects: wrong slot fill value type", () => {
+		const bad = { slotFills: { "item-1": { slot: 42 } }, syntheticItems: [] }
+
+		// arktype rejects it
+		expect(parseEnhancementResult(JSON.stringify(bad))).toBeNull()
+
+		// JSON Schema only allows string or null for slot values
+		const slotValueTypes =
+			enhancementResultJsonSchema.properties.slotFills.additionalProperties
+				.additionalProperties.type
+		expect(slotValueTypes).toContain("string")
+		expect(slotValueTypes).toContain("null")
+		expect(slotValueTypes).not.toContain("number")
+	})
+})

apps/aris-backend/src/enhancement/schema.ts

@@ -0,0 +1,89 @@
+import { type } from "arktype"
+
+const SyntheticItem = type({
+	id: "string",
+	type: "string",
+	text: "string",
+})
+
+const EnhancementResult = type({
+	slotFills: "Record<string, Record<string, string | null>>",
+	syntheticItems: SyntheticItem.array(),
+})
+
+export type SyntheticItem = typeof SyntheticItem.infer
+export type EnhancementResult = typeof EnhancementResult.infer
+
+/**
+ * JSON Schema passed to OpenRouter's structured output.
+ * OpenRouter doesn't support arktype, so this is maintained separately.
+ *
+ * ⚠️  Must stay in sync with EnhancementResult above.
+ * If you add/remove fields, update both schemas.
+ */
+export const enhancementResultJsonSchema = {
+	type: "object",
+	properties: {
+		slotFills: {
+			type: "object",
+			description:
+				"Map of feed item ID to an object of slot name to filled text content. Use null for slots that cannot be meaningfully filled.",
+			additionalProperties: {
+				type: "object",
+				additionalProperties: {
+					type: ["string", "null"],
+				},
+			},
+		},
+		syntheticItems: {
+			type: "array",
+			description:
+				"New feed items to inject (briefings, nudges, cross-source insights). Keep these short and actionable.",
+			items: {
+				type: "object",
+				properties: {
+					id: {
+						type: "string",
+						description: "Unique ID, e.g. 'briefing-morning'",
+					},
+					type: {
+						type: "string",
+						description: "One of: 'briefing', 'nudge', 'insight'",
+					},
+					text: {
+						type: "string",
+						description: "Display text, 1-3 sentences",
+					},
+				},
+				required: ["id", "type", "text"],
+				additionalProperties: false,
+			},
+		},
+	},
+	required: ["slotFills", "syntheticItems"],
+	additionalProperties: false,
+} as const
+
+/**
+ * Parses a JSON string into an EnhancementResult.
+ * Returns null if the input is malformed.
+ */
+export function parseEnhancementResult(json: string): EnhancementResult | null {
+	let parsed: unknown
+	try {
+		parsed = JSON.parse(json)
+	} catch {
+		return null
+	}
+
+	const result = EnhancementResult(parsed)
+	if (result instanceof type.errors) {
+		return null
+	}
+
+	return result
+}
+
+export function emptyEnhancementResult(): EnhancementResult {
+	return { slotFills: {}, syntheticItems: [] }
+}

apps/aris-backend/src/feed/http.test.ts

@@ -0,0 +1,144 @@
+import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aris/core"
+
+import { describe, expect, test } from "bun:test"
+import { Hono } from "hono"
+
+import { mockAuthSessionMiddleware } from "../auth/session-middleware.ts"
+import { UserSessionManager } from "../session/index.ts"
+import { registerFeedHttpHandlers } from "./http.ts"
+
+interface FeedResponse {
+	items: Array<{
+		id: string
+		type: string
+		priority: number
+		timestamp: string
+		data: Record<string, unknown>
+	}>
+	errors: Array<{ sourceId: string; error: string }>
+}
+
+function createStubSource(id: string, items: FeedItem[] = []): FeedSource {
+	return {
+		id,
+		async listActions(): Promise<Record<string, ActionDefinition>> {
+			return {}
+		},
+		async executeAction(): Promise<unknown> {
+			return undefined
+		},
+		async fetchContext(): Promise<readonly ContextEntry[] | null> {
+			return null
+		},
+		async fetchItems() {
+			return items
+		},
+	}
+}
+
+function buildTestApp(sessionManager: UserSessionManager, userId?: string) {
+	const app = new Hono()
+	registerFeedHttpHandlers(app, {
+		sessionManager,
+		authSessionMiddleware: mockAuthSessionMiddleware(userId),
+	})
+	return app
+}
+
+describe("GET /api/feed", () => {
+	test("returns 401 without auth", async () => {
+		const manager = new UserSessionManager({ providers: [] })
+		const app = buildTestApp(manager)
+
+		const res = await app.request("/api/feed")
+
+		expect(res.status).toBe(401)
+	})
+
+	test("returns cached feed when available", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				priority: 0.8,
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { value: 42 },
+			},
+		]
+		const manager = new UserSessionManager({
+			providers: [() => createStubSource("test", items)],
+		})
+		const app = buildTestApp(manager, "user-1")
+
+		// Prime the cache
+		const session = manager.getOrCreate("user-1")
+		await session.engine.refresh()
+		expect(session.engine.lastFeed()).not.toBeNull()
+
+		const res = await app.request("/api/feed")
+
+		expect(res.status).toBe(200)
+		const body = (await res.json()) as FeedResponse
+		expect(body.items).toHaveLength(1)
+		expect(body.items[0]!.id).toBe("item-1")
+		expect(body.items[0]!.type).toBe("test")
+		expect(body.items[0]!.priority).toBe(0.8)
+		expect(body.items[0]!.timestamp).toBe("2025-01-01T00:00:00.000Z")
+		expect(body.errors).toHaveLength(0)
+	})
+
+	test("forces refresh when no cached feed", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "fresh-1",
+				type: "test",
+				priority: 0.5,
+				timestamp: new Date("2025-06-01T12:00:00.000Z"),
+				data: { fresh: true },
+			},
+		]
+		const manager = new UserSessionManager({
+			providers: [() => createStubSource("test", items)],
+		})
+		const app = buildTestApp(manager, "user-1")
+
+		// No prior refresh — lastFeed() returns null, handler should call refresh()
+		const res = await app.request("/api/feed")
+
+		expect(res.status).toBe(200)
+		const body = (await res.json()) as FeedResponse
+		expect(body.items).toHaveLength(1)
+		expect(body.items[0]!.id).toBe("fresh-1")
+		expect(body.items[0]!.data.fresh).toBe(true)
+		expect(body.errors).toHaveLength(0)
+	})
+
+	test("serializes source errors as message strings", async () => {
+		const failingSource: FeedSource = {
+			id: "failing",
+			async listActions() {
+				return {}
+			},
+			async executeAction() {
+				return undefined
+			},
+			async fetchContext() {
+				return null
+			},
+			async fetchItems() {
+				throw new Error("connection timeout")
+			},
+		}
+		const manager = new UserSessionManager({ providers: [() => failingSource] })
+		const app = buildTestApp(manager, "user-1")
+
+		const res = await app.request("/api/feed")
+
+		expect(res.status).toBe(200)
+		const body = (await res.json()) as FeedResponse
+		expect(body.items).toHaveLength(0)
+		expect(body.errors).toHaveLength(1)
+		expect(body.errors[0]!.sourceId).toBe("failing")
+		expect(body.errors[0]!.error).toBe("connection timeout")
+	})
+})

apps/aris-backend/src/feed/http.ts

@@ -0,0 +1,45 @@
+import type { Context, Hono } from "hono"
+
+import { createMiddleware } from "hono/factory"
+
+import type { AuthSessionMiddleware } from "../auth/session-middleware.ts"
+import type { UserSessionManager } from "../session/index.ts"
+
+type Env = {
+	Variables: {
+		sessionManager: UserSessionManager
+	}
+}
+
+interface FeedHttpHandlersDeps {
+	sessionManager: UserSessionManager
+	authSessionMiddleware: AuthSessionMiddleware
+}
+
+export function registerFeedHttpHandlers(
+	app: Hono,
+	{ sessionManager, authSessionMiddleware }: FeedHttpHandlersDeps,
+) {
+	const inject = createMiddleware<Env>(async (c, next) => {
+		c.set("sessionManager", sessionManager)
+		await next()
+	})
+
+	app.get("/api/feed", inject, authSessionMiddleware, handleGetFeed)
+}
+
+async function handleGetFeed(c: Context<Env>) {
+	const user = c.get("user")!
+	const sessionManager = c.get("sessionManager")
+	const session = sessionManager.getOrCreate(user.id)
+
+	const feed = await session.feed()
+
+	return c.json({
+		items: feed.items,
+		errors: feed.errors.map((e) => ({
+			sourceId: e.sourceId,
+			error: e.error.message,
+		})),
+	})
+}

apps/aris-backend/src/server.ts

@@ -2,28 +2,52 @@ import { LocationSource } from "@aris/source-location"
 import { Hono } from "hono"
 
 import { registerAuthHandlers } from "./auth/http.ts"
+import { requireSession } from "./auth/session-middleware.ts"
+import { createFeedEnhancer } from "./enhancement/enhance-feed.ts"
+import { createLlmClient } from "./enhancement/llm-client.ts"
+import { registerFeedHttpHandlers } from "./feed/http.ts"
 import { registerLocationHttpHandlers } from "./location/http.ts"
 import { UserSessionManager } from "./session/index.ts"
 import { WeatherSourceProvider } from "./weather/provider.ts"
 
 function main() {
-	const sessionManager = new UserSessionManager([
-		() => new LocationSource(),
-		new WeatherSourceProvider({
-			credentials: {
-				privateKey: process.env.WEATHERKIT_PRIVATE_KEY!,
-				keyId: process.env.WEATHERKIT_KEY_ID!,
-				teamId: process.env.WEATHERKIT_TEAM_ID!,
-				serviceId: process.env.WEATHERKIT_SERVICE_ID!,
-			},
-		}),
-	])
+	const openrouterApiKey = process.env.OPENROUTER_API_KEY
+	const feedEnhancer = openrouterApiKey
+		? createFeedEnhancer({
+				client: createLlmClient({
+					apiKey: openrouterApiKey,
+					model: process.env.OPENROUTER_MODEL || undefined,
+				}),
+			})
+		: null
+	if (!feedEnhancer) {
+		console.warn("[enhancement] OPENROUTER_API_KEY not set — feed enhancement disabled")
+	}
+
+	const sessionManager = new UserSessionManager({
+		providers: [
+			() => new LocationSource(),
+			new WeatherSourceProvider({
+				credentials: {
+					privateKey: process.env.WEATHERKIT_PRIVATE_KEY!,
+					keyId: process.env.WEATHERKIT_KEY_ID!,
+					teamId: process.env.WEATHERKIT_TEAM_ID!,
+					serviceId: process.env.WEATHERKIT_SERVICE_ID!,
+				},
+			}),
+		],
+		feedEnhancer,
+	})
 
 	const app = new Hono()
 
 	app.get("/health", (c) => c.json({ status: "ok" }))
 
 	registerAuthHandlers(app)
+	registerFeedHttpHandlers(app, {
+		sessionManager,
+		authSessionMiddleware: requireSession,
+	})
 	registerLocationHttpHandlers(app, { sessionManager })
 
 	return app

apps/aris-backend/src/session/user-session-manager.test.ts

@@ -12,7 +12,7 @@ const mockWeatherClient: WeatherKitClient = {
 
 describe("UserSessionManager", () => {
 	test("getOrCreate creates session on first call", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session = manager.getOrCreate("user-1")
 
@@ -21,7 +21,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("getOrCreate returns same session for same user", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session1 = manager.getOrCreate("user-1")
 		const session2 = manager.getOrCreate("user-1")
@@ -30,7 +30,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("getOrCreate returns different sessions for different users", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session1 = manager.getOrCreate("user-1")
 		const session2 = manager.getOrCreate("user-2")
@@ -39,7 +39,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("each user gets independent source instances", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session1 = manager.getOrCreate("user-1")
 		const session2 = manager.getOrCreate("user-2")
@@ -51,7 +51,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove destroys session and allows re-creation", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session1 = manager.getOrCreate("user-1")
 		manager.remove("user-1")
@@ -61,13 +61,13 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove is no-op for unknown user", () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		expect(() => manager.remove("unknown")).not.toThrow()
 	})
 
 	test("accepts function providers", async () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session = manager.getOrCreate("user-1")
 		const result = await session.engine.refresh()
@@ -77,7 +77,9 @@ describe("UserSessionManager", () => {
 
 	test("accepts object providers", () => {
 		const provider = new WeatherSourceProvider({ client: mockWeatherClient })
-		const manager = new UserSessionManager([() => new LocationSource(), provider])
+		const manager = new UserSessionManager({
+			providers: [() => new LocationSource(), provider],
+		})
 
 		const session = manager.getOrCreate("user-1")
 
@@ -86,7 +88,9 @@ describe("UserSessionManager", () => {
 
 	test("accepts mixed providers", () => {
 		const provider = new WeatherSourceProvider({ client: mockWeatherClient })
-		const manager = new UserSessionManager([() => new LocationSource(), provider])
+		const manager = new UserSessionManager({
+			providers: [() => new LocationSource(), provider],
+		})
 
 		const session = manager.getOrCreate("user-1")
 
@@ -95,7 +99,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("refresh returns feed result through session", async () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session = manager.getOrCreate("user-1")
 		const result = await session.engine.refresh()
@@ -107,7 +111,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("location update via executeAction works", async () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 
 		const session = manager.getOrCreate("user-1")
 		await session.engine.executeAction("aris.location", "update-location", {
@@ -122,7 +126,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("subscribe receives updates after location push", async () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 		const callback = mock()
 
 		const session = manager.getOrCreate("user-1")
@@ -142,7 +146,7 @@ describe("UserSessionManager", () => {
 	})
 
 	test("remove stops reactive updates", async () => {
-		const manager = new UserSessionManager([() => new LocationSource()])
+		const manager = new UserSessionManager({ providers: [() => new LocationSource()] })
 		const callback = mock()
 
 		const session = manager.getOrCreate("user-1")

apps/aris-backend/src/session/user-session-manager.ts

@@ -1,13 +1,21 @@
+import type { FeedEnhancer } from "../enhancement/enhance-feed.ts"
 import type { FeedSourceProviderInput } from "./feed-source-provider.ts"
 
 import { UserSession } from "./user-session.ts"
 
+export interface UserSessionManagerConfig {
+	providers: FeedSourceProviderInput[]
+	feedEnhancer?: FeedEnhancer | null
+}
+
 export class UserSessionManager {
 	private sessions = new Map<string, UserSession>()
 	private readonly providers: FeedSourceProviderInput[]
+	private readonly feedEnhancer: FeedEnhancer | null
 
-	constructor(providers: FeedSourceProviderInput[]) {
-		this.providers = providers
+	constructor(config: UserSessionManagerConfig) {
+		this.providers = config.providers
+		this.feedEnhancer = config.feedEnhancer ?? null
 	}
 
 	getOrCreate(userId: string): UserSession {
@@ -16,7 +24,7 @@ export class UserSessionManager {
 			const sources = this.providers.map((p) =>
 				typeof p === "function" ? p(userId) : p.feedSourceForUser(userId),
 			)
-			session = new UserSession(sources)
+			session = new UserSession(sources, this.feedEnhancer)
 			this.sessions.set(userId, session)
 		}
 		return session

apps/aris-backend/src/session/user-session.test.ts

@@ -1,11 +1,11 @@
-import type { ActionDefinition, Context, FeedSource } from "@aris/core"
+import type { ActionDefinition, ContextEntry, FeedItem, FeedSource } from "@aris/core"
 
 import { LocationSource } from "@aris/source-location"
 import { describe, expect, test } from "bun:test"
 
 import { UserSession } from "./user-session.ts"
 
-function createStubSource(id: string): FeedSource {
+function createStubSource(id: string, items: FeedItem[] = []): FeedSource {
 	return {
 		id,
 		async listActions(): Promise<Record<string, ActionDefinition>> {
@@ -14,11 +14,11 @@ function createStubSource(id: string): FeedSource {
 		async executeAction(): Promise<unknown> {
 			return undefined
 		},
-		async fetchContext(): Promise<Partial<Context> | null> {
+		async fetchContext(): Promise<readonly ContextEntry[] | null> {
 			return null
 		},
 		async fetchItems() {
-			return []
+			return items
 		},
 	}
 }
@@ -70,3 +70,141 @@ describe("UserSession", () => {
 		expect(location.lastLocation!.lat).toBe(51.5)
 	})
 })
+
+describe("UserSession.feed", () => {
+	test("returns feed items without enhancer", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { value: 42 },
+			},
+		]
+		const session = new UserSession([createStubSource("test", items)])
+
+		const result = await session.feed()
+
+		expect(result.items).toHaveLength(1)
+		expect(result.items[0]!.id).toBe("item-1")
+	})
+
+	test("returns enhanced items when enhancer is provided", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { value: 42 },
+			},
+		]
+		const enhancer = async (feedItems: FeedItem[]) =>
+			feedItems.map((item) => ({ ...item, data: { ...item.data, enhanced: true } }))
+
+		const session = new UserSession([createStubSource("test", items)], enhancer)
+
+		const result = await session.feed()
+
+		expect(result.items).toHaveLength(1)
+		expect(result.items[0]!.data.enhanced).toBe(true)
+	})
+
+	test("caches enhanced items on subsequent calls", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { value: 42 },
+			},
+		]
+		let enhancerCallCount = 0
+		const enhancer = async (feedItems: FeedItem[]) => {
+			enhancerCallCount++
+			return feedItems.map((item) => ({ ...item, data: { ...item.data, enhanced: true } }))
+		}
+
+		const session = new UserSession([createStubSource("test", items)], enhancer)
+
+		const result1 = await session.feed()
+		expect(result1.items[0]!.data.enhanced).toBe(true)
+		expect(enhancerCallCount).toBe(1)
+
+		const result2 = await session.feed()
+		expect(result2.items[0]!.data.enhanced).toBe(true)
+		expect(enhancerCallCount).toBe(1)
+	})
+
+	test("re-enhances after engine refresh with new data", async () => {
+		let currentItems: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { version: 1 },
+			},
+		]
+		const source = createStubSource("test", currentItems)
+		// Make fetchItems dynamic so refresh returns new data
+		source.fetchItems = async () => currentItems
+
+		const enhancedVersions: number[] = []
+		const enhancer = async (feedItems: FeedItem[]) => {
+			const version = feedItems[0]!.data.version as number
+			enhancedVersions.push(version)
+			return feedItems.map((item) => ({
+				...item,
+				data: { ...item.data, enhanced: true },
+			}))
+		}
+
+		const session = new UserSession([source], enhancer)
+
+		// First feed triggers refresh + enhancement
+		const result1 = await session.feed()
+		expect(result1.items[0]!.data.version).toBe(1)
+		expect(result1.items[0]!.data.enhanced).toBe(true)
+
+		// Update source data and trigger engine refresh
+		currentItems = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-02T00:00:00.000Z"),
+				data: { version: 2 },
+			},
+		]
+		await session.engine.refresh()
+
+		// Wait for subscriber-triggered background enhancement
+		await new Promise((resolve) => setTimeout(resolve, 10))
+
+		// feed() should now serve re-enhanced items with version 2
+		const result2 = await session.feed()
+		expect(result2.items[0]!.data.version).toBe(2)
+		expect(result2.items[0]!.data.enhanced).toBe(true)
+		expect(enhancedVersions).toEqual([1, 2])
+	})
+
+	test("falls back to unenhanced items when enhancer throws", async () => {
+		const items: FeedItem[] = [
+			{
+				id: "item-1",
+				type: "test",
+				timestamp: new Date("2025-01-01T00:00:00.000Z"),
+				data: { value: 42 },
+			},
+		]
+		const enhancer = async () => {
+			throw new Error("enhancement exploded")
+		}
+
+		const session = new UserSession([createStubSource("test", items)], enhancer)
+
+		const result = await session.feed()
+
+		expect(result.items).toHaveLength(1)
+		expect(result.items[0]!.id).toBe("item-1")
+		expect(result.items[0]!.data.value).toBe(42)
+	})
+})

apps/aris-backend/src/session/user-session.ts

@@ -1,24 +1,104 @@
-import { FeedEngine, type FeedSource } from "@aris/core"
+import { FeedEngine, type FeedItem, type FeedResult, type FeedSource } from "@aris/core"
+
+import type { FeedEnhancer } from "../enhancement/enhance-feed.ts"
 
 export class UserSession {
 	readonly engine: FeedEngine
 	private sources = new Map<string, FeedSource>()
+	private readonly enhancer: FeedEnhancer | null
+	private enhancedItems: FeedItem[] | null = null
+	/** The FeedResult that enhancedItems was derived from. */
+	private enhancedSource: FeedResult | null = null
+	private enhancingPromise: Promise<void> | null = null
+	private unsubscribe: (() => void) | null = null
 
-	constructor(sources: FeedSource[]) {
+	constructor(sources: FeedSource[], enhancer?: FeedEnhancer | null) {
 		this.engine = new FeedEngine()
+		this.enhancer = enhancer ?? null
 		for (const source of sources) {
 			this.sources.set(source.id, source)
 			this.engine.register(source)
 		}
+
+		if (this.enhancer) {
+			this.unsubscribe = this.engine.subscribe((result) => {
+				this.invalidateEnhancement()
+				this.runEnhancement(result)
+			})
+		}
+
 		this.engine.start()
 	}
 
+	/**
+	 * Returns the current feed, refreshing if the engine cache expired.
+	 * Enhancement runs eagerly on engine updates; this method awaits
+	 * any in-flight enhancement or triggers one if needed.
+	 */
+	async feed(): Promise<FeedResult> {
+		const cached = this.engine.lastFeed()
+		const result = cached ?? (await this.engine.refresh())
+
+		if (!this.enhancer) {
+			return result
+		}
+
+		// Wait for any in-flight background enhancement to finish
+		if (this.enhancingPromise) {
+			await this.enhancingPromise
+		}
+
+		// Serve cached enhancement only if it matches the current engine result
+		if (this.enhancedItems && this.enhancedSource === result) {
+			return { ...result, items: this.enhancedItems }
+		}
+
+		// Stale or missing — re-enhance
+		await this.runEnhancement(result)
+
+		if (this.enhancedItems) {
+			return { ...result, items: this.enhancedItems }
+		}
+
+		return result
+	}
+
 	getSource<T extends FeedSource>(sourceId: string): T | undefined {
 		return this.sources.get(sourceId) as T | undefined
 	}
 
 	destroy(): void {
+		this.unsubscribe?.()
+		this.unsubscribe = null
 		this.engine.stop()
 		this.sources.clear()
+		this.invalidateEnhancement()
+		this.enhancingPromise = null
+	}
+
+	private invalidateEnhancement(): void {
+		this.enhancedItems = null
+		this.enhancedSource = null
+	}
+
+	private runEnhancement(result: FeedResult): Promise<void> {
+		const promise = this.enhance(result)
+		this.enhancingPromise = promise
+		promise.finally(() => {
+			if (this.enhancingPromise === promise) {
+				this.enhancingPromise = null
+			}
+		})
+		return promise
+	}
+
+	private async enhance(result: FeedResult): Promise<void> {
+		try {
+			this.enhancedItems = await this.enhancer!(result.items)
+			this.enhancedSource = result
+		} catch (err) {
+			console.error("[enhancement] Unexpected error:", err)
+			this.invalidateEnhancement()
+		}
 	}
 }

apps/waitlist-website/.dockerignore

@@ -0,0 +1,5 @@
+.react-router
+build
+node_modules
+.env
+README.md

apps/waitlist-website/.gitignore

@@ -0,0 +1,7 @@
+.DS_Store
+.env
+/node_modules/
+
+# React Router
+/.react-router/
+/build/

apps/waitlist-website/Dockerfile

@@ -0,0 +1,22 @@
+FROM oven/bun:1 AS development-dependencies-env
+COPY . /app
+WORKDIR /app
+RUN bun install
+
+FROM oven/bun:1 AS production-dependencies-env
+COPY ./package.json /app/
+WORKDIR /app
+RUN bun install --production
+
+FROM oven/bun:1 AS build-env
+COPY . /app/
+COPY --from=development-dependencies-env /app/node_modules /app/node_modules
+WORKDIR /app
+RUN bun run build
+
+FROM node:20-alpine
+COPY ./package.json /app/
+COPY --from=production-dependencies-env /app/node_modules /app/node_modules
+COPY --from=build-env /app/build /app/build
+WORKDIR /app
+CMD ["npm", "run", "start"]

apps/waitlist-website/README.md

@@ -0,0 +1,87 @@
+# Welcome to React Router!
+
+A modern, production-ready template for building full-stack React applications using React Router.
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/remix-run/react-router-templates/tree/main/default)
+
+## Features
+
+- 🚀 Server-side rendering
+- ⚡️ Hot Module Replacement (HMR)
+- 📦 Asset bundling and optimization
+- 🔄 Data loading and mutations
+- 🔒 TypeScript by default
+- 🎉 TailwindCSS for styling
+- 📖 [React Router docs](https://reactrouter.com/)
+
+## Getting Started
+
+### Installation
+
+Install the dependencies:
+
+```bash
+npm install
+```
+
+### Development
+
+Start the development server with HMR:
+
+```bash
+npm run dev
+```
+
+Your application will be available at `http://localhost:5173`.
+
+## Building for Production
+
+Create a production build:
+
+```bash
+npm run build
+```
+
+## Deployment
+
+### Docker Deployment
+
+To build and run using Docker:
+
+```bash
+docker build -t my-app .
+
+# Run the container
+docker run -p 3000:3000 my-app
+```
+
+The containerized application can be deployed to any platform that supports Docker, including:
+
+- AWS ECS
+- Google Cloud Run
+- Azure Container Apps
+- Digital Ocean App Platform
+- Fly.io
+- Railway
+
+### DIY Deployment
+
+If you're familiar with deploying Node applications, the built-in app server is production-ready.
+
+Make sure to deploy the output of `npm run build`
+
+```
+├── package.json
+├── package-lock.json (or pnpm-lock.yaml, or bun.lockb)
+├── build/
+│   ├── client/    # Static assets
+│   └── server/    # Server-side code
+```
+
+## Styling
+
+This template comes with [Tailwind CSS](https://tailwindcss.com/) already configured for a simple default starting experience. You can use whatever CSS framework you prefer.
+
+---
+
+Built with ❤️ using React Router.

apps/waitlist-website/app/app.css

@@ -0,0 +1,51 @@
+@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,200..900;1,8..60,200..900&display=swap");
+@import "tailwindcss";
+
+@source "../node_modules/streamdown/dist/*.js";
+
+@theme {
+	--font-sans:
+		"Inter", ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
+		"Segoe UI Symbol", "Noto Color Emoji";
+	--font-serif: "Source Serif 4", ui-serif, serif;
+}
+
+:root,
+html,
+body {
+	@apply w-full h-full;
+}
+
+@keyframes popover-in {
+	from {
+		opacity: 0;
+		transform: scale(0.95) translateY(4px);
+	}
+	to {
+		opacity: 1;
+		transform: scale(1) translateY(0);
+	}
+}
+
+@keyframes popover-out {
+	from {
+		opacity: 1;
+		transform: scale(1) translateY(0);
+	}
+	to {
+		opacity: 0;
+		transform: scale(0.95) translateY(4px);
+	}
+}
+
+html,
+body {
+	-webkit-font-smoothing: antialiased;
+	-moz-osx-font-smoothing: grayscale;
+
+	@apply bg-stone-50 dark:bg-stone-900 text-stone-900 dark:text-stone-200 selection:bg-teal-600 dark:selection:bg-teal-500 selection:text-stone-50 dark:selection:text-stone-900;
+
+	@media (prefers-color-scheme: dark) {
+		color-scheme: dark;
+	}
+}

apps/waitlist-website/app/chat/chat-box.tsx

@@ -0,0 +1,117 @@
+import clsx from "clsx"
+import { ArrowUpIcon, FileIcon, ImageIcon, PlusIcon, XIcon } from "lucide-react"
+import { motion, useAnimate } from "motion/react"
+import { useEffect, useRef, useState } from "react"
+import { Button, Menu, MenuItem, MenuTrigger, Popover } from "react-aria-components"
+
+export function ChatBox({
+	className,
+	validate,
+	onSubmit,
+}: {
+	className?: string
+	validate?: (value: string) => boolean
+	onSubmit: (email: string) => void
+	disabled?: boolean
+}) {
+	const [scope, animate] = useAnimate()
+	const [shouldShowInvalid, setShouldShowInvalid] = useState(false)
+	const clearInvalidStateTimeout = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+	useEffect(
+		() => () => {
+			if (clearInvalidStateTimeout.current) {
+				clearTimeout(clearInvalidStateTimeout.current)
+			}
+		},
+		[],
+	)
+
+	function showInvalidState() {
+		animate(scope.current, { x: [0, -6, 6, -4, 4, -2, 2, 0] }, { duration: 0.4, ease: "easeOut" })
+		if (clearInvalidStateTimeout.current) {
+			clearTimeout(clearInvalidStateTimeout.current)
+		}
+		setShouldShowInvalid(true)
+		clearInvalidStateTimeout.current = setTimeout(() => {
+			setShouldShowInvalid(false)
+		}, 500)
+	}
+
+	const onFormSubmit = (e: React.FormEvent<HTMLFormElement>) => {
+		e.preventDefault()
+		const formData = new FormData(e.currentTarget)
+		const email = formData.get("liame")
+		if (typeof email === "string") {
+			const trimmed = email.trim()
+			if (trimmed.length === 0) {
+				showInvalidState()
+			} else if (validate && !validate(trimmed)) {
+				showInvalidState()
+			} else {
+				onSubmit(trimmed)
+				e.currentTarget.reset()
+			}
+		}
+	}
+
+	return (
+		<motion.form
+			ref={scope}
+			onSubmit={onFormSubmit}
+			className={`min-h-20 px-3 pt-2 pb-1.5 flex flex-col justify-between rounded-lg bg-stone-100 dark:bg-stone-800 border border-stone-200 dark:border-stone-700 ${className ?? ""} shadow-xs hover:shadow-sm`}
+		>
+			<input
+				name="liame"
+				className="w-full bg-transparent outline-none focus:outline-none ring-0 focus:ring-0"
+			/>
+			<div className="w-full flex justify-between">
+				<MenuTrigger>
+					<Button className="bg-transparent hover:bg-stone-200 dark:hover:bg-stone-700 active:bg-stone-300 dark:active:bg-stone-600 data-[pressed]:bg-stone-200 dark:data-[pressed]:bg-stone-700 rounded-full flex items-center justify-center p-1 -ml-1.5 active:inset-shadow-sm outline-none transition-transform duration-200 data-[pressed]:rotate-45">
+						<PlusIcon size={16} />
+					</Button>
+					<Popover
+						offset={4}
+						className="origin-bottom-left rounded-lg border border-stone-200 dark:border-stone-700 bg-stone-100 dark:bg-stone-800 shadow-lg p-1 min-w-40 outline-none data-[entering]:animate-[popover-in_150ms_ease-out] data-[exiting]:animate-[popover-out_100ms_ease-in]"
+						placement="top start"
+					>
+						<AttachmentMenu />
+					</Popover>
+				</MenuTrigger>
+				<button
+					type="submit"
+					disabled={shouldShowInvalid}
+					className={clsx(
+						"transition-all rounded-full flex items-center justify-center p-1 -mr-1.5 active:scale-95",
+						shouldShowInvalid
+							? "bg-red-400 hover:bg-red-300 text-stone-200 dark:text-stone-700"
+							: "bg-teal-600 hover:bg-teal-500 active:bg-teal-600 text-stone-200",
+					)}
+				>
+					{shouldShowInvalid ? <XIcon size={16} /> : <ArrowUpIcon size={16} />}
+				</button>
+			</div>
+		</motion.form>
+	)
+}
+
+function AttachmentMenu() {
+	return (
+		<Menu className="outline-none">
+			<MenuItem
+				className="flex items-center gap-2 px-2 py-1 rounded-md cursor-default outline-none hover:bg-stone-200 dark:hover:bg-stone-700 focus:bg-stone-200 dark:focus:bg-stone-700"
+				onAction={() => {}}
+			>
+				<ImageIcon size={14} />
+				Photos
+			</MenuItem>
+			<MenuItem
+				className="flex items-center gap-2 px-2 py-1 rounded-md cursor-default outline-none hover:bg-stone-200 dark:hover:bg-stone-700 focus:bg-stone-200 dark:focus:bg-stone-700"
+				onAction={() => {}}
+			>
+				<FileIcon size={14} />
+				Files
+			</MenuItem>
+		</Menu>
+	)
+}

apps/waitlist-website/app/chat/message.ts

@@ -0,0 +1,66 @@
+export interface UserMessage {
+	role: "user"
+	message: string
+	bubbleLayoutId?: string
+}
+
+export interface SystemMessage {
+	role: "system"
+	message: string
+}
+
+export type Message = UserMessage | SystemMessage
+
+function timeOfDay() {
+	const hours = new Date().getHours()
+	if (hours >= 5 && hours < 12) {
+		return "morning"
+	} else if (hours >= 12 && hours < 18) {
+		return "afternoon"
+	} else if (hours >= 18 && hours < 22) {
+		return "evening"
+	}
+	return "night"
+}
+
+export const INITIAL_MESSAGES: Message[] = [
+	{
+		role: "user",
+		message: "Who are you?",
+	},
+	{
+		role: "system",
+		message: `Hey! I'm **Aelis** — your personal assistant that brings you the right thing, at the right time, in the right place.
+
+- Jubilee line down? I've already found you an alternative route.
+- Dinner reservation at 8? I'll have the restaurant, directions, and the menu ready before you head out.
+
+I learn your routines, anticipate what's next, and surface what matters before you even think to look for it.
+
+I'm not ready yet — [@kennethnym](https://x.com/kennethnym) is still building me. **Drop your email below** and I'll let you know when I'm available.`,
+	},
+]
+
+export function waitListJoinedMessage(email: string): SystemMessage {
+	return {
+		role: "system",
+		message: `Thanks for joining the waitlist! I've sent you a confirmation email.
+I'll send an email to **${email}** when I'm ready.
+
+Have a good ${timeOfDay()}!`,
+	}
+}
+
+export function duplicateEmailMessage(): SystemMessage {
+	return {
+		role: "system",
+		message: `I appreciate your excitement! You are already on the waitlist. When I am ready, I will reach out again. Have a good ${timeOfDay()} :)`,
+	}
+}
+
+export function troubleMessage(): SystemMessage {
+	return {
+		role: "system",
+		message: `I apologize, but I am having trouble adding you to the waitlist. Could you refresh the page and try again please in a moment?`,
+	}
+}

apps/waitlist-website/app/chat/use-fake-streaming.ts

@@ -0,0 +1,23 @@
+import { useEffect, useMemo, useState } from "react"
+
+export function useFakeStreaming(fullContent: string) {
+	const [currentContent, setCurrentContent] = useState("")
+	const [isStreaming, setIsStreaming] = useState(true)
+
+	useEffect(() => {
+		const words = fullContent.split(" ")
+
+		let i = 0
+		const id = setInterval(() => {
+			if (i > words.length) {
+				setIsStreaming(false)
+				clearInterval(id)
+			} else {
+				setCurrentContent(words.slice(0, i).join(" ") + " ")
+				i++
+			}
+		}, 20)
+	}, [fullContent])
+
+	return useMemo(() => ({ currentContent, isStreaming }), [currentContent, isStreaming])
+}

apps/waitlist-website/app/components/animated-logo.tsx

@@ -0,0 +1,168 @@
+import Lottie, { type LottieRef } from "lottie-react"
+import { useEffect, useRef, useState } from "react"
+
+import { useColorScheme } from "~/hooks/use-color-scheme"
+import clickedAnimationDark from "~/lottie/clicked-dark.json"
+import clickedAnimationLight from "~/lottie/clicked-light.json"
+import loadingAnimationDark from "~/lottie/loading-dark.json"
+import loadingAnimationLight from "~/lottie/loading-light.json"
+import startLoadingAnimationDark from "~/lottie/start-loading-dark.json"
+import startLoadingAnimationLight from "~/lottie/start-loading-light.json"
+
+export const AnimatedLogoState = {
+	Idle: "idle",
+	Loading: "loading",
+} as const
+export type AnimatedLogoState = (typeof AnimatedLogoState)[keyof typeof AnimatedLogoState]
+
+interface AnimatedLogoProps {
+	state: AnimatedLogoState
+	className?: string
+}
+
+interface Animation {
+	loop: boolean
+	reverse: boolean
+	sticky: boolean
+	data: unknown
+}
+
+export function AnimatedLogo({ state, className }: AnimatedLogoProps) {
+	const colorScheme = useColorScheme()
+	const [animationQueue, setAnimationQueue] = useState<Animation[]>([])
+	const lottieRef: LottieRef = useRef(null)
+
+	let currentAnimation: Animation
+	let isIdle = false
+	if (animationQueue.length === 0) {
+		isIdle = true
+		currentAnimation = {
+			loop: false,
+			reverse: false,
+			sticky: false,
+			data: colorScheme === "dark" ? startLoadingAnimationDark : startLoadingAnimationLight,
+		}
+	} else {
+		isIdle = false
+		currentAnimation = animationQueue[0]
+	}
+
+	useEffect(() => {
+		if (state === AnimatedLogoState.Loading) {
+			setAnimationQueue((queue) => [
+				...queue,
+				{
+					loop: false,
+					reverse: false,
+					sticky: false,
+					data: colorScheme === "dark" ? startLoadingAnimationDark : startLoadingAnimationLight,
+				},
+				{
+					loop: true,
+					reverse: false,
+					sticky: false,
+					data: colorScheme === "dark" ? loadingAnimationDark : loadingAnimationLight,
+				},
+			])
+		} else if (state === AnimatedLogoState.Idle) {
+			setAnimationQueue((queue) => {
+				const last = queue.at(-1)
+				if (!last) {
+					return []
+				}
+				if (
+					last.loop &&
+					(last.data === loadingAnimationDark || last.data === loadingAnimationLight)
+				) {
+					return [
+						...queue,
+						{
+							loop: false,
+							sticky: false,
+							reverse: false,
+							data: colorScheme === "dark" ? loadingAnimationDark : loadingAnimationLight,
+						},
+						{
+							loop: false,
+							sticky: false,
+							reverse: true,
+							data: colorScheme === "dark" ? startLoadingAnimationDark : startLoadingAnimationLight,
+						},
+					]
+				}
+				return []
+			})
+		}
+	}, [state])
+
+	useEffect(() => {
+		if (!lottieRef.current) {
+			return
+		}
+		if (currentAnimation.reverse) {
+			const frames = lottieRef.current.getDuration(true)
+			if (frames) {
+				lottieRef.current.setDirection(-1)
+				lottieRef.current.goToAndPlay(frames - 1, true)
+			}
+		} else if (!isIdle) {
+			lottieRef.current.setDirection(1)
+			lottieRef.current.play()
+		}
+	}, [currentAnimation])
+
+	function onComplete() {
+		if (animationQueue.length > 0 && !animationQueue[0].sticky) {
+			setAnimationQueue((queue) => queue.slice(1))
+		}
+	}
+
+	function onLoopComplete() {
+		const current = animationQueue[0]
+		const next = animationQueue[1]
+		if (current && next && current.data === next.data && current.loop && !next.loop) {
+			setAnimationQueue((queue) => queue.slice(2))
+		}
+	}
+
+	function onMouseDown() {
+		if (state === AnimatedLogoState.Idle) {
+			setAnimationQueue([
+				{
+					loop: false,
+					sticky: true,
+					reverse: false,
+					data: colorScheme === "dark" ? clickedAnimationDark : clickedAnimationLight,
+				},
+			])
+		}
+	}
+
+	function onMouseUp() {
+		if (state === AnimatedLogoState.Idle) {
+			setAnimationQueue((queue) => [
+				{
+					loop: false,
+					sticky: false,
+					reverse: true,
+					data: colorScheme === "dark" ? clickedAnimationDark : clickedAnimationLight,
+				},
+			])
+		}
+	}
+
+	return (
+		<Lottie
+			lottieRef={lottieRef}
+			autoplay={false}
+			loop={currentAnimation.loop}
+			className={className}
+			animationData={currentAnimation.data}
+			onComplete={onComplete}
+			onLoopComplete={onLoopComplete}
+			onMouseDown={onMouseDown}
+			onMouseUp={onMouseUp}
+			onMouseLeave={onMouseUp}
+		/>
+	)
+}

apps/waitlist-website/app/components/progressive-blur.tsx

@@ -0,0 +1,35 @@
+export function ProgressiveBlur({
+	className,
+	direction = "down",
+}: {
+	className?: string
+	direction?: "down" | "up"
+}) {
+	if (direction === "up") {
+		return (
+			<div className={`pointer-events-none ${className ?? ""}`}>
+				<div className="absolute inset-0 backdrop-blur-[1px] [mask:linear-gradient(rgba(0,0,0,0)_0%,rgba(0,0,0,1)_10%,rgba(0,0,0,1)_20%,rgba(0,0,0,0)_30%)]" />
+				<div className="absolute inset-0 backdrop-blur-[2px] [mask:linear-gradient(rgba(0,0,0,0)_10%,rgba(0,0,0,1)_20%,rgba(0,0,0,1)_40%,rgba(0,0,0,0)_50%)]" />
+				<div className="absolute inset-0 backdrop-blur-[4px] [mask:linear-gradient(rgba(0,0,0,0)_20%,rgba(0,0,0,1)_30%,rgba(0,0,0,1)_50%,rgba(0,0,0,0)_60%)]" />
+				<div className="absolute inset-0 backdrop-blur-[8px] [mask:linear-gradient(rgba(0,0,0,0)_30%,rgba(0,0,0,1)_40%,rgba(0,0,0,1)_60%,rgba(0,0,0,0)_70%)]" />
+				<div className="absolute inset-0 backdrop-blur-[16px] [mask:linear-gradient(rgba(0,0,0,0)_40%,rgba(0,0,0,1)_50%,rgba(0,0,0,1)_70%,rgba(0,0,0,0)_80%)]" />
+				<div className="absolute inset-0 backdrop-blur-[32px] [mask:linear-gradient(rgba(0,0,0,0)_50%,rgba(0,0,0,1)_60%,rgba(0,0,0,1)_80%,rgba(0,0,0,0)_90%)]" />
+				<div className="absolute inset-0 backdrop-blur-[64px] [mask:linear-gradient(rgba(0,0,0,0)_70%,rgba(0,0,0,1)_80%,rgba(0,0,0,1)_100%)]" />
+				<div className="absolute inset-0 bg-linear-to-t from-stone-50 dark:from-stone-900 to-transparent" />
+			</div>
+		)
+	}
+
+	return (
+		<div className={`pointer-events-none ${className ?? ""}`}>
+			<div className="absolute inset-0 backdrop-blur-[64px] [mask:linear-gradient(rgba(0,0,0,1)_0%,rgba(0,0,0,1)_20%,rgba(0,0,0,0)_30%)]" />
+			<div className="absolute inset-0 backdrop-blur-[32px] [mask:linear-gradient(rgba(0,0,0,0)_10%,rgba(0,0,0,1)_20%,rgba(0,0,0,1)_40%,rgba(0,0,0,0)_50%)]" />
+			<div className="absolute inset-0 backdrop-blur-[16px] [mask:linear-gradient(rgba(0,0,0,0)_20%,rgba(0,0,0,1)_30%,rgba(0,0,0,1)_50%,rgba(0,0,0,0)_60%)]" />
+			<div className="absolute inset-0 backdrop-blur-[8px] [mask:linear-gradient(rgba(0,0,0,0)_30%,rgba(0,0,0,1)_40%,rgba(0,0,0,1)_60%,rgba(0,0,0,0)_70%)]" />
+			<div className="absolute inset-0 backdrop-blur-[4px] [mask:linear-gradient(rgba(0,0,0,0)_40%,rgba(0,0,0,1)_50%,rgba(0,0,0,1)_70%,rgba(0,0,0,0)_80%)]" />
+			<div className="absolute inset-0 backdrop-blur-[2px] [mask:linear-gradient(rgba(0,0,0,0)_50%,rgba(0,0,0,1)_60%,rgba(0,0,0,1)_80%,rgba(0,0,0,0)_90%)]" />
+			<div className="absolute inset-0 backdrop-blur-[1px] [mask:linear-gradient(rgba(0,0,0,0)_70%,rgba(0,0,0,1)_80%,rgba(0,0,0,1)_90%,rgba(0,0,0,0)_100%)]" />
+			<div className="absolute inset-0 bg-linear-to-b from-stone-50 dark:from-stone-900 to-transparent" />
+		</div>
+	)
+}

apps/waitlist-website/app/hooks/use-color-scheme.ts

@@ -0,0 +1,27 @@
+import { useEffect, useState } from "react"
+
+export const ColorScheme = {
+	Light: "light",
+	Dark: "dark",
+} as const
+export type ColorScheme = (typeof ColorScheme)[keyof typeof ColorScheme]
+
+export function useColorScheme(): ColorScheme {
+	const [scheme, setScheme] = useState<ColorScheme>(() => {
+		if (typeof window === "undefined") return ColorScheme.Light
+		return window.matchMedia("(prefers-color-scheme: dark)").matches
+			? ColorScheme.Dark
+			: ColorScheme.Light
+	})
+
+	useEffect(() => {
+		const mql = window.matchMedia("(prefers-color-scheme: dark)")
+		const handler = (e: MediaQueryListEvent) => {
+			setScheme(e.matches ? ColorScheme.Dark : ColorScheme.Light)
+		}
+		mql.addEventListener("change", handler)
+		return () => mql.removeEventListener("change", handler)
+	}, [])
+
+	return scheme
+}

apps/waitlist-website/app/lottie/clicked-dark.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":7,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,53]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,122]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":0,"k":[160,53]},"s":{"a":0,"k":[320,106]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":0,"k":[160,53]},"p":{"a":0,"k":[200.5,200]},"r":{"a":1,"k":[{"t":0,"s":[-30],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":6,"s":[-10],"h":1}]}},"ip":0,"op":7,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":7,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,53]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,122]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":0,"k":[160,53]},"s":{"a":0,"k":[320,106]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":0,"k":[160,53]},"p":{"a":0,"k":[200.594,200.176]},"r":{"a":1,"k":[{"t":0,"s":[30],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":6,"s":[10],"h":1}]}},"ip":0,"op":7,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":7,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":7,"st":0}],"meta":{"g":"https://jitter.video"},"op":6,"v":"5.7.4","w":400}

apps/waitlist-website/app/lottie/clicked-light.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":7,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,53]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,122]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":0,"k":[160,53]},"s":{"a":0,"k":[320,106]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":0,"k":[160,53]},"p":{"a":0,"k":[200.5,200]},"r":{"a":1,"k":[{"t":0,"s":[-30],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":6,"s":[-10],"h":1}]}},"ip":0,"op":7,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":7,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,53]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,122]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":0,"k":[160,53]},"s":{"a":0,"k":[320,106]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":0,"k":[160,53]},"p":{"a":0,"k":[200.594,200.176]},"r":{"a":1,"k":[{"t":0,"s":[30],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":6,"s":[10],"h":1}]}},"ip":0,"op":7,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":7,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":7,"st":0}],"meta":{"g":"https://jitter.video"},"op":6,"v":"5.7.4","w":400}

apps/waitlist-website/app/lottie/loading-dark.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":61,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,1],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[320,1],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[320,106],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[320,106],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200,200.014]},"r":{"a":1,"k":[{"t":0,"s":[-90],"h":1},{"t":8.4,"s":[-90],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":30,"s":[0],"h":1},{"t":37.8,"s":[0],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":60,"s":[90],"h":1}]}},"ip":0,"op":61,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":61,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,1],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[320,106],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.094,200.19]},"r":{"a":1,"k":[{"t":0,"s":[-90],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":30,"s":[0],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":60,"s":[90],"h":1}]}},"ip":0,"op":61,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":61,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":61,"st":0}],"meta":{"g":"https://jitter.video"},"op":60,"v":"5.7.4","w":400}

apps/waitlist-website/app/lottie/loading-light.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":61,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,1],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[320,1],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[320,106],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[320,106],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":8.4,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":37.8,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200,200.014]},"r":{"a":1,"k":[{"t":0,"s":[-90],"h":1},{"t":8.4,"s":[-90],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":30,"s":[0],"h":1},{"t":37.8,"s":[0],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":60,"s":[90],"h":1}]}},"ip":0,"op":61,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":61,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,1],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[320,106],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,0.5],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":30,"s":[160,53],"i":{"x":[1,0],"y":[1,1]},"o":{"x":[0,0.5],"y":[0,0]}},{"t":60,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.094,200.19]},"r":{"a":1,"k":[{"t":0,"s":[-90],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":30,"s":[0],"i":{"x":0,"y":1},"o":{"x":0.5,"y":0}},{"t":60,"s":[90],"h":1}]}},"ip":0,"op":61,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":61,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":61,"st":0}],"meta":{"g":"https://jitter.video"},"op":60,"v":"5.7.4","w":400}

apps/waitlist-website/app/lottie/start-loading-dark.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":31,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[160,53],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,106],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[320,106],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[160,53],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.5,200]},"r":{"a":1,"k":[{"t":0,"s":[-30],"h":1},{"t":5.28,"s":[-30],"i":{"x":0.001,"y":0.998},"o":{"x":0.349,"y":0}},{"t":30,"s":[-90],"h":1}]}},"ip":0,"op":31,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":31,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,106],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.906,0.898,0.894]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.594,200.176]},"r":{"a":1,"k":[{"t":0,"s":[30],"i":{"x":0,"y":0.999},"o":{"x":0.348,"y":0}},{"t":30,"s":[90],"h":1}]}},"ip":0,"op":31,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":31,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":31,"st":0}],"meta":{"g":"https://jitter.video"},"op":30,"v":"5.7.4","w":400}

apps/waitlist-website/app/lottie/start-loading-light.json

@@ -0,0 +1 @@
+{"fr":60,"h":400,"ip":0,"layers":[{"ind":3,"ty":4,"parent":2,"ks":{},"ip":0,"op":31,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[160,53],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,106],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[320,106],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":2,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,1],"y":[1,1]},"o":{"x":[0,0],"y":[0,0]}},{"t":5.28,"s":[160,53],"i":{"x":[1,0.001],"y":[1,0.998]},"o":{"x":[0,0.349],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.5,200]},"r":{"a":1,"k":[{"t":0,"s":[-30],"h":1},{"t":5.28,"s":[-30],"i":{"x":0.001,"y":0.998},"o":{"x":0.349,"y":0}},{"t":30,"s":[-90],"h":1}]}},"ip":0,"op":31,"st":0},{"ind":5,"ty":4,"parent":4,"ks":{},"ip":0,"op":31,"st":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","p":{"a":0,"k":[160,26.75]},"r":{"a":0,"k":0},"s":{"a":0,"k":[336,174.5]}},{"ty":"fl","c":{"a":0,"k":[0,0,0,0]},"o":{"a":0,"k":0}},{"ty":"tr","o":{"a":0,"k":100}}]},{"ty":"gr","it":[{"ty":"el","p":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"s":{"a":1,"k":[{"t":0,"s":[320,106],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[320,1],"h":1}]}},{"ty":"st","c":{"a":0,"k":[0.11,0.098,0.09]},"lc":1,"lj":1,"ml":10,"o":{"a":0,"k":100},"w":{"a":0,"k":16}},{"ty":"tr","o":{"a":0,"k":100}}]}]},{"ind":4,"ty":3,"parent":1,"ks":{"a":{"a":1,"k":[{"t":0,"s":[160,53],"i":{"x":[1,0],"y":[1,0.999]},"o":{"x":[0,0.348],"y":[0,0]}},{"t":30,"s":[160,0.5],"h":1}]},"p":{"a":0,"k":[200.594,200.176]},"r":{"a":1,"k":[{"t":0,"s":[30],"i":{"x":0,"y":0.999},"o":{"x":0.348,"y":0}},{"t":30,"s":[90],"h":1}]}},"ip":0,"op":31,"st":0},{"ind":1,"ty":3,"parent":0,"ks":{},"ip":0,"op":31,"st":0},{"ind":0,"ty":3,"ks":{},"ip":0,"op":31,"st":0}],"meta":{"g":"https://jitter.video"},"op":30,"v":"5.7.4","w":400}

apps/waitlist-website/app/root.tsx

@@ -0,0 +1,88 @@
+import { isRouteErrorResponse, Links, Meta, Outlet, Scripts, ScrollRestoration } from "react-router"
+
+import type { Route } from "./+types/root"
+
+import "./app.css"
+import "streamdown/styles.css"
+
+export const links: Route.LinksFunction = () => [
+	{ rel: "preconnect", href: "https://fonts.googleapis.com" },
+	{
+		rel: "preconnect",
+		href: "https://fonts.gstatic.com",
+		crossOrigin: "anonymous",
+	},
+	{
+		rel: "stylesheet",
+		href: "https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap",
+	},
+	{
+		rel: "icon",
+		href: "/favicon-light.svg",
+		type: "image/svg+xml",
+		media: "(prefers-color-scheme: light)",
+	},
+	{
+		rel: "icon",
+		href: "/favicon-dark.svg",
+		type: "image/svg+xml",
+		media: "(prefers-color-scheme: dark)",
+	},
+	{
+		rel: "icon",
+		href: "/favicon.ico",
+		sizes: "any",
+	},
+]
+
+export function Layout({ children }: { children: React.ReactNode }) {
+	return (
+		<html lang="en">
+			<head>
+				<meta charSet="utf-8" />
+				<meta name="viewport" content="width=device-width, initial-scale=1" />
+				<Meta />
+				<Links />
+			</head>
+			<body>
+				{children}
+				<ScrollRestoration />
+				<Scripts />
+			</body>
+		</html>
+	)
+}
+
+export default function App() {
+	return <Outlet />
+}
+
+export function ErrorBoundary({ error }: Route.ErrorBoundaryProps) {
+	let message = "Oops!"
+	let details = "An unexpected error occurred."
+	let stack: string | undefined
+
+	if (isRouteErrorResponse(error)) {
+		message = error.status === 404 ? "404" : "Error"
+		details =
+			error.status === 404 ? "The requested page could not be found." : error.statusText || details
+	} else if (import.meta.env.DEV && error && error instanceof Error) {
+		details = error.message
+		stack = error.stack
+	}
+
+	return (
+		<main className="flex flex-col items-center justify-center w-full h-full gap-4">
+			<h1 className="text-6xl font-semibold">{message}</h1>
+			<p className="text-stone-600 dark:text-stone-400">{details}</p>
+			<a href="/" className="mt-4 text-sm underline opacity-50 hover:opacity-75">
+				Back to home
+			</a>
+			{stack && (
+				<pre className="mt-8 w-full max-w-2xl p-4 overflow-x-auto text-xs bg-stone-100 dark:bg-stone-800 rounded-lg">
+					<code>{stack}</code>
+				</pre>
+			)}
+		</main>
+	)
+}

apps/waitlist-website/app/routes.ts

@@ -0,0 +1,6 @@
+import { type RouteConfig, index, route } from "@react-router/dev/routes"
+
+export default [
+	index("routes/home.tsx"),
+	route("privacy", "routes/privacy-policy.tsx"),
+] satisfies RouteConfig

apps/waitlist-website/app/routes/home.tsx

@@ -0,0 +1,395 @@
+import { AnimatePresence, motion } from "motion/react"
+import React, { useEffect, useLayoutEffect, useRef, useState } from "react"
+import { Link, useFetcher } from "react-router"
+import { Resend } from "resend"
+import { Streamdown } from "streamdown"
+
+import { ChatBox } from "~/chat/chat-box"
+import {
+	duplicateEmailMessage,
+	INITIAL_MESSAGES,
+	troubleMessage,
+	waitListJoinedMessage,
+	type Message,
+	type SystemMessage,
+	type UserMessage,
+} from "~/chat/message"
+import { useFakeStreaming } from "~/chat/use-fake-streaming"
+import {
+	AnimatedLogo,
+	AnimatedLogoState,
+	AnimatedLogoState as TAnimatedLogoState,
+} from "~/components/animated-logo"
+import { ProgressiveBlur } from "~/components/progressive-blur"
+
+import type { Route } from "./+types/home"
+
+const PAGE_TITLE = "Aelis - Next Generation AI Assistant"
+const PAGE_DESCRIPTION =
+	"Meet Aelis, a personal assistant that stays one step ahead of your day. Join the waitlist now."
+
+export function meta({}: Route.MetaArgs) {
+	return [
+		{ title: PAGE_TITLE },
+		{
+			name: "description",
+			content: PAGE_DESCRIPTION,
+		},
+		{ property: "og:title", content: PAGE_TITLE },
+		{ property: "og:description", content: PAGE_DESCRIPTION },
+		{ property: "og:image", content: "https://ael.is/social-media-preview.png" },
+		{ property: "og:url", content: "https://ael.is" },
+		{ property: "og:type", content: "website" },
+		{ name: "twitter:card", content: "summary_large_image" },
+		{ name: "twitter:title", content: PAGE_TITLE },
+		{ name: "twitter:description", content: PAGE_DESCRIPTION },
+		{ name: "twitter:image", content: "https://ael.is/social-media-preview.png" },
+	]
+}
+
+const FormError = {
+	Duplicate: "duplicate",
+	Resend: "resend",
+} as const
+
+export async function action({ request }: Route.ActionArgs) {
+	const formData = await request.formData()
+	const email = formData.get("email")
+
+	if (typeof email !== "string" || !isValidEmail(email)) {
+		return { error: "Invalid email" }
+	}
+
+	const resend = new Resend(process.env.RESEND_API_KEY)
+
+	const segmentId = "b80fb036-74a1-4f7d-bca5-2c035b696071"
+
+	const dup = await resend.contacts.get({
+		email,
+	})
+	if (dup.data) {
+		return { error: FormError.Duplicate }
+	}
+
+	const res = await resend.contacts.create({
+		email,
+		segments: [{ id: segmentId }],
+	})
+
+	if (res.error) {
+		console.log("Error adding contact to Resend:", res.error)
+		return { error: FormError.Resend, message: res.error.message }
+	}
+
+	await new Promise((resolve) => setTimeout(resolve, 1000))
+
+	const emailRes = await resend.emails.send({
+		from: "Aelis <no-reply@ael.is>",
+		to: email,
+		template: {
+			id: "waitlist-confirmation",
+		},
+	})
+
+	if (emailRes.error) {
+		// swallow the error since the user is already added to the waitlist, but log it for debugging
+		console.log("Error sending confirmation email:", emailRes.error)
+	}
+
+	return { email }
+}
+
+export default function Home() {
+	const [messages, setMessages] = useState<Message[]>(INITIAL_MESSAGES)
+	const [emailSent, setEmailSent] = useState("")
+	const [isAnimatingSend, setIsAnimatingSend] = useState(false)
+	const [logoState, setLogoState] = useState<TAnimatedLogoState>(AnimatedLogoState.Idle)
+	const chatBoxRef = useRef<HTMLDivElement>(null)
+	const fetcher = useFetcher()
+
+	useEffect(() => {
+		if (fetcher.data?.email && !isAnimatingSend) {
+			setMessages((messages) => [...messages, waitListJoinedMessage(fetcher.data.email)])
+		} else if (fetcher.data?.error) {
+			if (!isAnimatingSend) {
+				let errorMessage: SystemMessage
+				switch (fetcher.data.error) {
+					case FormError.Duplicate:
+						errorMessage = duplicateEmailMessage()
+						break
+					default: {
+						console.error(fetcher.data.error)
+						errorMessage = troubleMessage()
+						break
+					}
+				}
+				setMessages((messages) => [...messages, errorMessage])
+			}
+		}
+	}, [fetcher.data?.email, fetcher.data?.error, isAnimatingSend])
+
+	const insertEmailMessage = (email: string) => {
+		setEmailSent(email)
+		setIsAnimatingSend(true)
+		setLogoState(AnimatedLogoState.Loading)
+		setMessages((messages) => [
+			...messages,
+			{
+				role: "user",
+				message: email,
+				bubbleLayoutId: "test",
+			},
+		])
+
+		fetcher.submit({ email }, { method: "post" })
+	}
+
+	let chatBox: React.ReactNode
+	if (emailSent && isAnimatingSend) {
+		const chatBoxRect = chatBoxRef.current?.getBoundingClientRect()
+		const mainRect = chatBoxRef.current?.offsetParent?.getBoundingClientRect()
+		chatBox = (
+			<MorphingChatBox
+				chatBoxWidth={chatBoxRef.current?.offsetWidth ?? 0}
+				chatBoxHeight={chatBoxRef.current?.offsetHeight ?? 0}
+				chatBoxLeft={(chatBoxRect?.left ?? 0) - (mainRect?.left ?? 0)}
+				chatBoxTop={(chatBoxRect?.top ?? 0) - (mainRect?.top ?? 0)}
+				onAnimationEnd={() => {
+					setIsAnimatingSend(false)
+				}}
+			>
+				{emailSent}
+			</MorphingChatBox>
+		)
+	} else if (!emailSent) {
+		chatBox = (
+			<AnimatePresence>
+				{logoState === AnimatedLogoState.Idle && !emailSent && (
+					<motion.div
+						ref={chatBoxRef}
+						key="test"
+						className="w-full max-w-2xl absolute bottom-12 px-6 md:px-0 flex justify-center z-20"
+						initial={{ y: 100, opacity: 0 }}
+						animate={{ y: 0, opacity: 1 }}
+						transition={{ type: "spring", stiffness: 300, damping: 30, mass: 1.5 }}
+					>
+						<ChatBox
+							className="w-full max-w-2xl"
+							validate={isValidEmail}
+							disabled={fetcher.state === "submitting" || fetcher.state === "loading"}
+							onSubmit={insertEmailMessage}
+						/>
+					</motion.div>
+				)}
+			</AnimatePresence>
+		)
+	} else {
+		chatBox = null
+	}
+
+	return (
+		<main className="relative w-full h-full flex flex-col items-center justify-start gap-4 overflow-hidden">
+			<ProgressiveBlur className="absolute top-0 left-0 right-0 h-24 z-10" />
+			<AnimatedLogo
+				className="absolute top-4 md:top-8 size-10 z-20 cursor-pointer"
+				state={logoState}
+			/>
+			<MessageList
+				messages={messages}
+				showLastMessage={!isAnimatingSend}
+				onMessageStreamStart={() => {
+					setLogoState(AnimatedLogoState.Loading)
+				}}
+				onMessageStreamEnd={() => {
+					setLogoState(AnimatedLogoState.Idle)
+				}}
+			/>
+			{chatBox}
+			<ProgressiveBlur
+				direction="up"
+				className="absolute bottom-0 left-0 right-0 h-24 z-10 pointer-events-none"
+			/>
+			<footer className="absolute bottom-4 z-20">
+				<Link to="/privacy" className="text-xs opacity-50 underline">
+					Privacy policy
+				</Link>
+			</footer>
+		</main>
+	)
+}
+
+function MorphingChatBox({
+	chatBoxWidth,
+	chatBoxHeight,
+	chatBoxLeft,
+	chatBoxTop,
+	onAnimationEnd,
+	children,
+}: React.PropsWithChildren<{
+	chatBoxWidth: number
+	chatBoxHeight: number
+	chatBoxLeft: number
+	chatBoxTop: number
+	onAnimationEnd: () => void
+}>) {
+	const [targetWidth, setTargetWidth] = useState(-1)
+	const [targetHeight, setTargetHeight] = useState(-1)
+	const [targetCoords, setTargetCoords] = useState([0, 0])
+
+	useLayoutEffect(() => {
+		const bubble = document.getElementById("test")
+		if (bubble) {
+			const mainRect = bubble.closest("main")?.getBoundingClientRect()
+			const rect = bubble.getBoundingClientRect()
+			setTargetWidth(bubble.offsetWidth)
+			setTargetHeight(bubble.offsetHeight)
+			setTargetCoords([rect.left - (mainRect?.left ?? 0), rect.top - (mainRect?.top ?? 0)])
+		}
+	}, [])
+
+	if (targetWidth < 0 || targetHeight < 0) {
+		return null
+	}
+
+	return (
+		<motion.div
+			className="absolute rounded-lg bg-stone-100 dark:bg-stone-800 px-4 py-2 border border-stone-200 dark:border-stone-700"
+			initial={{
+				width: chatBoxWidth,
+				height: chatBoxHeight,
+				borderRadius: 8,
+				left: chatBoxLeft,
+				top: chatBoxTop,
+			}}
+			animate={{
+				width: targetWidth,
+				height: targetHeight,
+				borderTopLeftRadius: 100,
+				borderTopRightRadius: 100,
+				borderBottomRightRadius: 24,
+				borderBottomLeftRadius: 100,
+				left: targetCoords[0],
+				top: targetCoords[1],
+			}}
+			transition={{
+				left: { duration: 0.45, ease: [0.05, 0.8, 0.3, 1] },
+				top: { duration: 0.45, ease: [0.3, 0, 0.2, 1] },
+				width: { duration: 0.45, ease: [0.05, 0.8, 0.3, 1] },
+				height: { duration: 0.45, ease: [0.05, 0.8, 0.3, 1] },
+			}}
+			onAnimationComplete={onAnimationEnd}
+		>
+			{children}
+		</motion.div>
+	)
+}
+
+function MessageList({
+	messages,
+	showLastMessage,
+	onMessageStreamStart,
+	onMessageStreamEnd,
+}: {
+	messages: Message[]
+	showLastMessage: boolean
+	onMessageStreamStart: () => void
+	onMessageStreamEnd: () => void
+}) {
+	return (
+		<ul className="w-full flex flex-col gap-8 overflow-auto px-6 pt-20 md:px-0 md:pt-24 pb-34">
+			{messages.map((message, index) => (
+				<li
+					key={index}
+					className={`flex justify-center ${index === messages.length - 1 && !showLastMessage ? "invisible" : ""}`}
+				>
+					<MessageContent
+						message={message}
+						onMessageStreamStart={onMessageStreamStart}
+						onMessageStreamEnd={onMessageStreamEnd}
+					/>
+				</li>
+			))}
+		</ul>
+	)
+}
+
+function MessageContent({
+	message,
+	onMessageStreamStart,
+	onMessageStreamEnd,
+}: {
+	message: Message
+	onMessageStreamStart: () => void
+	onMessageStreamEnd: () => void
+}) {
+	switch (message.role) {
+		case "user":
+			return <UserMessageBubble message={message} />
+		case "system":
+			return (
+				<SystemMessageBubble
+					message={message}
+					onStreamStart={onMessageStreamStart}
+					onStreamEnd={onMessageStreamEnd}
+				/>
+			)
+	}
+}
+
+function UserMessageBubble({ message }: { message: UserMessage }) {
+	return (
+		<div className="w-full max-w-2xl flex justify-end">
+			<div
+				id={message.bubbleLayoutId}
+				className="rounded-[100px_100px_24px_100px] bg-stone-100 dark:bg-stone-800 border border-stone-200 dark:border-stone-700 px-4 py-2"
+			>
+				{message.message}
+			</div>
+		</div>
+	)
+}
+
+function SystemMessageBubble({
+	message,
+	onStreamStart,
+	onStreamEnd,
+}: {
+	message: SystemMessage
+	onStreamStart: () => void
+	onStreamEnd: () => void
+}) {
+	const { currentContent, isStreaming } = useFakeStreaming(message.message)
+	const ref = useRef<HTMLDivElement>(null)
+
+	useEffect(() => {
+		ref.current?.scrollIntoView({ behavior: "smooth", block: "end" })
+	}, [currentContent])
+
+	useEffect(() => {
+		if (isStreaming) {
+			onStreamStart()
+		} else {
+			onStreamEnd()
+		}
+	}, [isStreaming])
+
+	return (
+		<div ref={ref} className="w-full max-w-2xl flex justify-start font-serif text-lg scroll-mb-34">
+			<Streamdown
+				animated={{ animation: "slideUp" }}
+				isAnimating={isStreaming}
+				linkSafety={{ enabled: false }}
+				components={{
+					// @ts-expect-error
+					a: ({ className, ...props }) => <a className={`underline ${className}`} {...props} />,
+				}}
+			>
+				{currentContent}
+			</Streamdown>
+		</div>
+	)
+}
+
+function isValidEmail(value: string): boolean {
+	return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value)
+}

apps/waitlist-website/app/routes/privacy-policy.tsx

@@ -0,0 +1,246 @@
+import { Link } from "react-router"
+import { Streamdown } from "streamdown"
+
+import { AnimatedLogo, AnimatedLogoState } from "~/components/animated-logo"
+
+import type { Route } from "./+types/privacy-policy"
+
+export function meta({}: Route.MetaArgs) {
+	return [
+		{ title: "Privacy Policy — Aelis" },
+		{ name: "description", content: "Aelis privacy policy" },
+	]
+}
+
+export default function PrivacyPolicy() {
+	return (
+		<main className="relative max-w-2xl mx-auto px-6 py-16">
+			<Link to="/" className="block w-fit mb-8">
+				<AnimatedLogo className="size-10 pointer-events-none" state={AnimatedLogoState.Idle} />
+			</Link>
+			<Streamdown
+				isAnimating={false}
+				linkSafety={{ enabled: false }}
+				components={{
+					a: ({ className, ...props }) => <a className={`underline ${className}`} {...props} />,
+				}}
+			>
+				{POLICY}
+			</Streamdown>
+			<footer className="mt-16 pt-8 border-t border-stone-200 dark:border-stone-700">
+				<Link to="/" className="text-sm opacity-50 hover:opacity-75 underline">
+					Back to home
+				</Link>
+			</footer>
+		</main>
+	)
+}
+
+const POLICY = `# Privacy Policy
+
+**Last updated:** March 5, 2026
+
+This Privacy Policy describes how **Aelis** ("we", "us", or "our") collects, uses, and protects your personal information when you visit **https://ael.is** or interact with our services.
+
+If you do not agree with this Privacy Policy, please do not use the website.
+
+For any questions, contact: **[kenneth@nym.sh](mailto:kenneth@nym.sh)**
+
+---
+
+## 1. Information We Collect
+
+### Personal Information You Provide
+
+**In Short:** We collect personal information that you provide to us.
+
+We collect personal information that you voluntarily provide when you express interest in our services, contact us, or sign up for the waitlist.
+
+We collect your email address when you sign up for the waitlist so we can notify you when the product launches or provide related updates.
+
+### Personal Information Provided by You
+
+The personal information we collect may include:
+
+* email addresses
+
+You are responsible for ensuring the personal information you provide is accurate and up to date.
+
+### Sensitive Information
+
+We **do not collect or process sensitive personal information**.
+
+### Information From Third Parties
+
+We **do not collect personal information from third parties**.
+
+---
+
+## 2. How We Use Your Information
+
+We process your information for the following purposes:
+
+* To operate and maintain our services
+* To communicate with you about product updates and launch announcements
+* To send administrative information such as policy updates
+* To prevent fraud or abuse
+* To comply with legal obligations
+* To protect someone’s safety when necessary
+
+We only process personal information when we have a valid legal reason to do so.
+
+---
+
+## 3. Legal Bases for Processing (EU / UK)
+
+If you are located in the European Economic Area (EEA) or the United Kingdom, we rely on the following legal bases to process personal information:
+
+### Consent
+
+You have given permission for us to process your personal information for a specific purpose.
+
+### Contract
+
+Processing is necessary to provide services you requested.
+
+### Legal Obligations
+
+Processing is required to comply with applicable laws.
+
+### Vital Interests
+
+Processing is necessary to protect someone's safety.
+
+You may withdraw consent at any time by contacting us.
+
+---
+
+## 4. When and With Whom We Share Personal Information
+
+We may share your personal information in limited situations.
+
+### Service Providers
+
+We may share information with trusted service providers that help us operate our website or manage communications.
+
+### Business Transfers
+
+We may transfer information during negotiations of a merger, sale of assets, financing, or acquisition of our business.
+
+We **do not sell your personal information**.
+
+---
+
+## 5. How Long We Keep Your Information
+
+We retain personal information only as long as necessary to:
+
+* provide services
+* comply with legal obligations
+* resolve disputes
+* enforce agreements
+
+When we no longer need personal information, we delete or anonymize it where possible.
+
+---
+
+## 6. How We Keep Your Information Safe
+
+We implement reasonable technical and organizational safeguards designed to protect personal information.
+
+However, no electronic transmission or storage system is completely secure. We cannot guarantee absolute security.
+
+---
+
+## 7. Information From Minors
+
+Our services are **not intended for individuals under 18 years old**.
+
+We do not knowingly collect personal information from children. If we discover that we have collected such information, we will delete it.
+
+If you believe a child has provided personal information, contact **[kenneth@nym.sh](mailto:kenneth@nym.sh)**.
+
+---
+
+## 8. Your Privacy Rights
+
+Depending on your location, you may have rights regarding your personal information, including:
+
+* the right to access your data
+* the right to correct inaccurate data
+* the right to delete your data
+* the right to restrict processing
+* the right to data portability
+* the right to object to processing
+* the right to withdraw consent
+
+To exercise these rights, submit a request:
+
+https://app.termly.io/dsar/b8633d03-406f-4133-b16e-ded63e893997
+
+Or contact us at **[kenneth@nym.sh](mailto:kenneth@nym.sh)**.
+
+---
+
+## 9. Do Not Track (DNT)
+
+Many browsers include a **Do Not Track (DNT)** feature.
+
+Because there is currently no consistent standard for responding to DNT signals, we do not respond to them.
+
+---
+
+## 10. Global Privacy Control
+
+We recognize **Global Privacy Control (GPC)** signals.
+
+If your browser sends a GPC signal, we treat it as a request to opt out of the sale or sharing of personal information where applicable.
+
+More information: https://globalprivacycontrol.org
+
+---
+
+## 11. Privacy Rights in Other Regions
+
+Additional privacy rights may apply depending on your location, including:
+
+* European Economic Area (EEA)
+* United Kingdom
+* Switzerland
+* Canada
+* United States
+* Australia
+* New Zealand
+
+If you believe we are processing your personal information unlawfully, you may contact your local data protection authority.
+
+---
+
+## 12. Updates to This Privacy Policy
+
+We may update this Privacy Policy from time to time.
+
+When we do, we will update the **Last updated** date at the top of this document.
+
+We encourage users to review this Privacy Policy regularly.
+
+---
+
+## 13. Contact Information
+
+If you have questions or comments about this Privacy Policy, you may contact us:
+
+**Aelis**
+
+Email: **[kenneth@nym.sh](mailto:kenneth@nym.sh)**
+
+---
+
+## 14. Request Access, Update, or Deletion
+
+Depending on applicable law, you may request access to, correction of, or deletion of your personal information.
+
+Email:
+
+**[kenneth@nym.sh](mailto:kenneth@nym.sh)**
+`

apps/waitlist-website/fly.toml

@@ -0,0 +1,22 @@
+# fly.toml app configuration file generated for aelis-waitlist-website on 2026-03-08T01:11:12Z
+#
+# See https://fly.io/docs/reference/configuration/ for information about how to use this file.
+#
+
+app = 'aelis-waitlist-website'
+primary_region = 'lhr'
+
+[build]
+
+[http_service]
+  internal_port = 3000
+  force_https = true
+  auto_stop_machines = 'stop'
+  auto_start_machines = true
+  min_machines_running = 0
+  processes = ['app']
+
+[[vm]]
+  memory = '1gb'
+  cpus = 1
+  memory_mb = 1024

apps/waitlist-website/package.json

@@ -0,0 +1,37 @@
+{
+	"name": "waitlist-website",
+	"private": true,
+	"type": "module",
+	"scripts": {
+		"build": "react-router build",
+		"dev": "react-router dev",
+		"start": "react-router-serve ./build/server/index.js",
+		"typecheck": "react-router typegen && tsc"
+	},
+	"dependencies": {
+		"@react-router/node": "7.12.0",
+		"@react-router/serve": "7.12.0",
+		"clsx": "^2.1.1",
+		"isbot": "^5.1.31",
+		"lottie-react": "^2.4.1",
+		"lucide-react": "^0.577.0",
+		"motion": "^12.35.0",
+		"react": "^19.2.4",
+		"react-aria-components": "^1.16.0",
+		"react-dom": "^19.2.4",
+		"react-router": "7.12.0",
+		"resend": "^6.9.3",
+		"streamdown": "^2.4.0"
+	},
+	"devDependencies": {
+		"@react-router/dev": "7.12.0",
+		"@tailwindcss/vite": "^4.1.13",
+		"@types/node": "^22",
+		"@types/react": "^19.2.7",
+		"@types/react-dom": "^19.2.3",
+		"tailwindcss": "^4.1.13",
+		"typescript": "^5.9.2",
+		"vite": "^7.1.7",
+		"vite-tsconfig-paths": "^5.1.4"
+	}
+}

apps/waitlist-website/public/favicon-dark.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg width="100%" height="100%" viewBox="0 0 1667 1667" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:1.5;"><rect id="dark" x="0" y="0" width="1666.67" height="1666.67" style="fill:none;"/><path d="M943.75,642.086c318.648,183.972 527.874,419.028 466.934,524.581c-60.941,105.552 -369.119,41.885 -687.767,-142.086c-318.649,-183.972 -527.875,-419.029 -466.934,-524.581c60.941,-105.552 369.119,-41.886 687.767,142.086Z" style="fill:none;stroke:#e7e5e4;stroke-width:62.5px;"/><path d="M722.917,642.086c318.648,-183.972 626.826,-247.638 687.767,-142.086c60.94,105.552 -148.286,340.609 -466.934,524.581c-318.648,183.971 -626.826,247.638 -687.767,142.086c-60.941,-105.553 148.285,-340.609 466.934,-524.581Z" style="fill:none;stroke:#e7e5e4;stroke-width:62.5px;"/></svg>

apps/waitlist-website/public/favicon-light.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg width="100%" height="100%" viewBox="0 0 1667 1667" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:1.5;"><rect id="light" x="0" y="0" width="1666.67" height="1666.67" style="fill:none;"/><g id="light1" serif:id="light"><path d="M943.75,642.086c318.648,183.972 527.874,419.028 466.934,524.581c-60.941,105.552 -369.119,41.885 -687.767,-142.086c-318.649,-183.972 -527.875,-419.029 -466.934,-524.581c60.941,-105.552 369.119,-41.886 687.767,142.086Z" style="fill:none;stroke:#1c1917;stroke-width:62.5px;"/><path d="M722.917,642.086c318.648,-183.972 626.826,-247.638 687.767,-142.086c60.94,105.552 -148.286,340.609 -466.934,524.581c-318.648,183.971 -626.826,247.638 -687.767,142.086c-60.941,-105.553 148.285,-340.609 466.934,-524.581Z" style="fill:none;stroke:#1c1917;stroke-width:62.5px;"/></g></svg>

apps/waitlist-website/public/robots.txt

@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://ael.is/sitemap.xml

apps/waitlist-website/public/sitemap.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+	<url>
+		<loc>https://ael.is/</loc>
+	</url>
+	<url>
+		<loc>https://ael.is/privacy</loc>
+	</url>
+</urlset>

apps/waitlist-website/react-router.config.ts

@@ -0,0 +1,7 @@
+import type { Config } from "@react-router/dev/config"
+
+export default {
+	// Config options...
+	// Server-side render by default, to enable SPA mode set this to `false`
+	ssr: true,
+} satisfies Config

apps/waitlist-website/tsconfig.json

@@ -0,0 +1,22 @@
+{
+	"include": ["**/*", "**/.server/**/*", "**/.client/**/*", ".react-router/types/**/*"],
+	"compilerOptions": {
+		"lib": ["DOM", "DOM.Iterable", "ES2022"],
+		"types": ["node", "vite/client"],
+		"target": "ES2022",
+		"module": "ES2022",
+		"moduleResolution": "bundler",
+		"jsx": "react-jsx",
+		"rootDirs": [".", "./.react-router/types"],
+		"baseUrl": ".",
+		"paths": {
+			"~/*": ["./app/*"]
+		},
+		"esModuleInterop": true,
+		"verbatimModuleSyntax": true,
+		"noEmit": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"strict": true
+	}
+}

apps/waitlist-website/vite.config.ts

@@ -0,0 +1,11 @@
+import { reactRouter } from "@react-router/dev/vite"
+import tailwindcss from "@tailwindcss/vite"
+import { defineConfig } from "vite"
+import tsconfigPaths from "vite-tsconfig-paths"
+
+export default defineConfig({
+	plugins: [tailwindcss(), reactRouter(), tsconfigPaths()],
+	ssr: {
+		noExternal: ["lottie-react"],
+	},
+})

docs/architecture-draft.md

@@ -16,8 +16,8 @@ Examples of feed items:
 ## Design Principles
 
 1. **Extensibility**: The core must support different data sources, including third-party sources.
-2. **Separation of concerns**: Core handles data only. UI rendering is a separate system.
-3. **Parallel execution**: Sources run in parallel; no inter-source dependencies.
+2. **Separation of concerns**: Core handles data and UI description. The client is a thin renderer.
+3. **Dependency graph**: Sources declare dependencies on other sources. The engine resolves the graph and runs independent sources in parallel.
 4. **Graceful degradation**: Failed sources are skipped; partial results are returned.
 
 ## Architecture
@@ -25,26 +25,28 @@ Examples of feed items:
 ```
 ┌─────────────────────────────────────────────────────────────┐
 │                         Backend                              │
-│  ┌─────────────┐    ┌─────────────┐    ┌─────────────────┐  │
-│  │  aris-core  │    │   Sources   │    │  UI Registry    │  │
-│  │             │    │  (plugins)  │    │  (schemas from  │  │
-│  │ - Reconciler│◄───│ - Calendar  │    │   third parties)│  │
-│  │ - Context   │    │ - Weather   │    │                 │  │
-│  │ - FeedItem  │    │ - Spotify   │    │                 │  │
-│  └─────────────┘    └─────────────┘    └─────────────────┘  │
-│         │                                      │             │
-│         ▼                                      ▼             │
-│    Feed (data only)                    UI Schemas (JSON)     │
+│  ┌─────────────┐    ┌─────────────┐                         │
+│  │  aris-core  │    │   Sources   │                         │
+│  │             │    │  (plugins)  │                         │
+│  │ - FeedEngine│◄───│ - Calendar  │                         │
+│  │ - Context   │    │ - Weather   │                         │
+│  │ - FeedItem  │    │ - TfL       │                         │
+│  │ - Actions   │    │ - Spotify   │                         │
+│  └─────────────┘    └─────────────┘                         │
+│         │                                                    │
+│         ▼                                                    │
+│    Feed items (data + ui trees + slots)                      │
 └─────────────────────────────────────────────────────────────┘
-                    │                           │
-                    ▼                           ▼
+                    │
+                    ▼ (WebSocket / JSON-RPC)
 ┌─────────────────────────────────────────────────────────────┐
-│                        Frontend                              │
+│                    Client (React Native)                      │
 │  ┌──────────────────────────────────────────────────────┐   │
-│  │  Renderer                                             │   │
-│  │  - Receives feed items                                │   │
-│  │  - Fetches UI schema by item type                     │   │
-│  │  - Renders using json-render or similar               │   │
+│  │  json-render + twrnc component map                    │   │
+│  │  - Receives feed items with ui trees                  │   │
+│  │  - Renders using registered RN components + twrnc     │   │
+│  │  - User interactions trigger source actions           │   │
+│  │  - Bespoke native components for rich interactions    │   │
 │  └──────────────────────────────────────────────────────┘   │
 └─────────────────────────────────────────────────────────────┘
 ```
@@ -54,15 +56,16 @@ Examples of feed items:
 The core is responsible for:
 
 - Defining the context and feed item interfaces
-- Providing a reconciler that orchestrates data sources
+- Providing a `FeedEngine` that orchestrates sources via a dependency graph
 - Returning a flat list of prioritized feed items
+- Routing action execution to the correct source
 
 ### Key Concepts
 
-- **Context**: Time and location (with accuracy) passed to all sources
-- **FeedItem**: Has an ID (source-generated, stable), type, priority, timestamp, and JSON-serializable data
-- **DataSource**: Interface that third parties implement to provide feed items
-- **Reconciler**: Orchestrates sources, runs them in parallel, returns items and any errors
+- **Context**: Time and location (with accuracy) passed to all sources. Sources can contribute to context (e.g., location source provides coordinates, weather source provides conditions).
+- **FeedItem**: Has an ID (source-generated, stable), type, timestamp, JSON-serializable data, optional actions, an optional `ui` tree, and optional `slots` for LLM-fillable content.
+- **FeedSource**: Interface that first and third parties implement to provide context, feed items, and actions. Uses reverse-domain IDs (e.g., `aris.weather`, `com.spotify`).
+- **FeedEngine**: Orchestrates sources respecting their dependency graph, runs independent sources in parallel, returns items and any errors. Routes action execution to the correct source.
 
 ## Data Sources
 
@@ -71,10 +74,13 @@ Key decisions:
 - Sources receive the full context and decide internally what to use
 - Each source returns a single item type (e.g., separate "Calendar Source" and "Location Suggestion Source" rather than a combined "Google Source")
 - Sources live in separate packages, not in the core
+- Sources declare dependencies on other sources (e.g., weather depends on location)
 - Sources are responsible for:
   - Transforming their domain data into feed items
   - Assigning priority based on domain logic (e.g., "event starting in 10 minutes" = high priority)
   - Returning empty arrays when nothing is relevant
+  - Providing a `ui` tree for each feed item
+  - Declaring and handling actions (e.g., RSVP, complete task, play/pause)
 
 ### Configuration
 
@@ -83,28 +89,323 @@ Configuration is passed at source registration time, not per reconcile call. Sou
 ## Feed Output
 
 - Flat list of `FeedItem` objects
-- No UI information (no icons, card types, etc.)
+- Items carry data, an optional `ui` field describing their layout, and optional `slots` for LLM enhancement
 - Items are a discriminated union by `type` field
-- Reconciler sorts by priority; can act as tiebreaker
 
-## UI Rendering (Separate from Core)
+## UI Rendering: Server-Driven UI
 
-The core does not handle UI. For extensible third-party UI:
+The UI for feed items is **server-driven**. Sources describe how their items look using a JSON tree (the `ui` field on `FeedItem`). The client renders these trees using [json-render](https://json-render.dev/) with a registered set of React Native components styled via [twrnc](https://github.com/jaredh159/tailwind-react-native-classnames).
 
-1. Third-party apps register their UI schemas through the backend (UI Registry)
-2. Frontend fetches UI schemas from the backend
-3. Frontend matches feed items to schemas by `type` and renders accordingly
+### How it works
 
-This approach:
+1. Sources return feed items with a `ui` field — a JSON tree describing the card layout using Tailwind class strings.
+2. The client passes a component map to json-render. Each component wraps a React Native primitive and resolves `className` via twrnc.
+3. json-render walks the tree and renders native components. twrnc parses Tailwind classes at runtime — no build step, arbitrary values work.
+4. User interactions (tap, etc.) map to source actions via the `actions` field on `FeedItem`. The client sends action requests to the backend, which routes them to the correct source via `FeedEngine.executeAction()`.
 
-- Keeps the core focused on data
-- Works across platforms (web, React Native)
-- Avoids the need for third parties to inject code into the app
-- Uses a json-render style approach for declarative UI from JSON schemas
+### Styling
 
-Reference: https://github.com/vercel-labs/json-render
+- Sources use Tailwind CSS class strings via the `className` prop (e.g., `"p-4 bg-white dark:bg-black rounded-xl"`).
+- twrnc resolves classes to React Native style objects at runtime. Supports arbitrary values (`mt-[31px]`, `bg-[#eaeaea]`), dark mode (`dark:bg-black`), and platform prefixes (`ios:pt-4 android:pt-2`).
+- Custom colors and spacing are configured via `tailwind.config.js` on the client.
+- No compile-time constraint — all styles resolve at runtime.
+
+### Two tiers of UI
+
+- **Server-driven (default):** Any source can return a `ui` tree. Covers most cards — weather, tasks, alerts, package tracking, news, etc. Simple interactions go through source actions. This is the default path for both first-party and third-party sources.
+- **Bespoke native:** For cards that need rich client interaction (gestures, animations, real-time updates), a native React Native component is registered in the json-render component map and referenced by type. Third parties that need this level of richness work with the ARIS team to get it integrated.
+
+### Why server-driven
+
+- Feed items are inherently server-driven — the data comes from sources on the backend. Attaching the layout alongside the data is a natural extension.
+- Card designs can be updated without shipping an app update.
+- Third-party sources can ship their own UI without bundling anything new into the app.
+
+Reference: https://json-render.dev/
+
+## Feed Items with UI and Slots
+
+> Note: the codebase has evolved since the sections above. The engine now uses a dependency graph with topological ordering (`FeedEngine`, `FeedSource`), not the parallel reconciler described above. The `priority` field is being replaced by post-processing (see the ideas doc). This section describes the UI and enhancement architecture going forward.
+
+Feed items carry an optional `ui` field containing a json-render tree, and an optional `slots` field for LLM-fillable content.
+
+```typescript
+interface FeedItem<TType, TData> {
+  id: string
+  type: TType
+  timestamp: Date
+  data: TData
+  ui?: JsonRenderNode
+  slots?: Record<string, Slot>
+}
+
+interface Slot {
+  /** Tells the LLM what this slot wants — the source writes this */
+  description: string
+  /** LLM-filled text content, null until enhanced */
+  content: string | null
+}
+```
+
+### How it works
+
+The source produces the item with a UI tree and empty slots:
+
+```typescript
+// Weather source produces:
+{
+  id: "weather-current-123",
+  type: "weather-current",
+  data: { temperature: 18, condition: "cloudy" },
+  ui: {
+    component: "VStack",
+    children: [
+      { component: "WeatherHeader", props: { temp: 18, condition: "cloudy" } },
+      { component: "Slot", props: { name: "insight" } },
+      { component: "HourlyChart", props: { hours: [...] } },
+      { component: "Slot", props: { name: "cross-source" } },
+    ]
+  },
+  slots: {
+    "insight": {
+      description: "A short contextual insight about the current weather and how it affects the user's day",
+      content: null
+    },
+    "cross-source": {
+      description: "Connection between weather and the user's calendar events or plans",
+      content: null
+    }
+  }
+}
+```
+
+The LLM enhancement harness fills `content`:
+
+```typescript
+slots: {
+  "insight": {
+    description: "...",
+    content: "Rain after 3pm — grab a jacket before your walk"
+  },
+  "cross-source": {
+    description: "...",
+    content: "Should be dry by 7pm for your dinner at The Ivy"
+  }
+}
+```
+
+The client renders the `ui` tree. When it hits a `Slot` node, it looks up `slots[name].content`. If non-null, render the text. If null, render nothing.
+
+### Separation of concerns
+
+- **Sources** own the UI layout and declare what slots exist with descriptions.
+- **The LLM** fills slot content. It doesn't know about layout or positioning.
+- **The client** renders the UI tree and resolves slots to their content.
+
+Sources define the prompt for each slot via the `description` field. The harness doesn't need to know what slots any source type has — it reads them dynamically from the items.
+
+Each source defines its own slots. The harness handles them automatically — no central registry needed.
+
+## Enhancement Harness
+
+The LLM enhancement harness fills slots and produces synthetic feed items. It runs reactively — triggered by context changes, not by a timer.
+
+### Execution model
+
+```
+FeedEngine.refresh()
+  → sources produce items with ui + empty slots
+         ↓
+Fast path (rule-based post-processors, <10ms)
+  → group, dedup, affinity, time-adjust
+  → merge LAST cached slot fills + synthetic items
+  → return feed to UI immediately
+         ↓
+Background: has context changed since last LLM run?
+  (hash of: item IDs + data + slot descriptions + user memory)
+         ↓
+No  → done, cache is still valid
+Yes → run LLM harness async
+      → fill slots + generate synthetic items
+      → cache result
+      → push updated feed to UI via WebSocket
+```
+
+The user never waits for the LLM. They see the feed instantly with the previous enhancement applied. If the LLM produces new slot content or synthetic items, the feed updates in place.
+
+### LLM input
+
+The harness serializes items with their unfilled slots into a single prompt. Items without slots are excluded. The LLM sees everything at once and fills whatever slots are relevant.
+
+```typescript
+function buildHarnessInput(
+  items: FeedItem[],
+  context: AgentContext,
+): HarnessInput {
+  const itemsWithSlots = items
+    .filter(item => item.slots && Object.keys(item.slots).length > 0)
+    .map(item => ({
+      id: item.id,
+      type: item.type,
+      data: item.data,
+      slots: Object.fromEntries(
+        Object.entries(item.slots!).map(
+          ([name, slot]) => [name, slot.description]
+        )
+      ),
+    }))
+
+  return {
+    items: itemsWithSlots,
+    userMemory: context.preferences,
+    currentTime: new Date().toISOString(),
+  }
+}
+```
+
+The LLM sees:
+
+```json
+{
+  "items": [
+    {
+      "id": "weather-current-123",
+      "type": "weather-current",
+      "data": { "temperature": 18, "condition": "cloudy" },
+      "slots": {
+        "insight": "A short contextual insight about the current weather and how it affects the user's day",
+        "cross-source": "Connection between weather and the user's calendar events or plans"
+      }
+    },
+    {
+      "id": "calendar-event-456",
+      "type": "calendar-event",
+      "data": { "title": "Dinner at The Ivy", "startTime": "19:00", "location": "The Ivy, West St" },
+      "slots": {
+        "context": "Background on this event, attendees, or previous meetings with these people",
+        "logistics": "Travel time, parking, directions to the venue",
+        "weather": "Weather conditions relevant to this event's time and location"
+      }
+    }
+  ],
+  "userMemory": { "commute": "victoria-line", "preference.walking_distance": "1 mile" },
+  "currentTime": "2025-02-26T14:30:00Z"
+}
+```
+
+### LLM output
+
+A flat map of item ID → slot name → text content. Slots left null are unfilled.
+
+```json
+{
+  "slotFills": {
+    "weather-current-123": {
+      "insight": "Rain after 3pm — grab a jacket before your walk",
+      "cross-source": "Should be dry by 7pm for your dinner at The Ivy"
+    },
+    "calendar-event-456": {
+      "context": null,
+      "logistics": "20-minute walk from home — leave by 18:40",
+      "weather": "Rain clears by evening, you'll be fine"
+    }
+  },
+  "syntheticItems": [
+    {
+      "id": "briefing-morning",
+      "type": "briefing",
+      "data": {},
+      "ui": { "component": "Text", "props": { "text": "Light afternoon — just your dinner at 7. Rain clears by then." } }
+    }
+  ],
+  "suppress": [],
+  "rankingHints": {}
+}
+```
+
+### Enhancement manager
+
+One per user, living in the `FeedEngineManager` on the backend:
+
+```typescript
+class EnhancementManager {
+  private cache: EnhancementResult | null = null
+  private lastInputHash: string | null = null
+  private running = false
+
+  async enhance(
+    items: FeedItem[],
+    context: AgentContext,
+  ): Promise<EnhancementResult> {
+    const hash = computeHash(items, context)
+
+    if (hash === this.lastInputHash && this.cache) {
+      return this.cache
+    }
+
+    if (this.running) {
+      return this.cache ?? emptyResult()
+    }
+
+    this.running = true
+    this.runHarness(items, context)
+      .then(result => {
+        this.cache = result
+        this.lastInputHash = hash
+        this.notifySubscribers(result)
+      })
+      .finally(() => { this.running = false })
+
+    return this.cache ?? emptyResult()
+  }
+}
+
+interface EnhancementResult {
+  slotFills: Record<string, Record<string, string | null>>
+  syntheticItems: FeedItem[]
+  suppress: string[]
+  rankingHints: Record<string, number>
+}
+```
+
+### Merging
+
+After the harness runs, the engine merges slot fills into items:
+
+```typescript
+function mergeEnhancement(
+  items: FeedItem[],
+  result: EnhancementResult,
+): FeedItem[] {
+  return items.map(item => {
+    const fills = result.slotFills[item.id]
+    if (!fills || !item.slots) return item
+
+    const mergedSlots = { ...item.slots }
+    for (const [name, content] of Object.entries(fills)) {
+      if (name in mergedSlots && content !== null) {
+        mergedSlots[name] = { ...mergedSlots[name], content }
+      }
+    }
+
+    return { ...item, slots: mergedSlots }
+  })
+}
+```
+
+### Cost control
+
+- **Hash-based cache gate.** Most refreshes reuse the cached result.
+- **Debounce.** Rapid context changes (location updates) settle before triggering a run.
+- **Skip inactive users.** Don't run if the user hasn't opened the app in 2+ hours.
+- **Exclude slotless items.** Only items with slots are sent to the LLM.
+- **Text-only output.** Slots produce strings, not UI trees — fewer output tokens, less variance.
 
 ## Open Questions
 
-- Exact schema format for UI registry
-- How third parties authenticate/register their sources and UI schemas
+- How third parties authenticate/register their sources
+- Exact set of React Native components exposed in the json-render component map
+- Validation/sandboxing of third-party ui trees
+- How synthetic items define their UI (full json-render tree vs. registered component)
+- Should slots support rich content (json-render nodes) in the future, or stay text-only?
+- How to handle slot content that references other items (e.g., "your dinner at The Ivy" linking to the calendar card)

docs/feed-source-actions-spec.md

@@ -125,7 +125,7 @@ interface FeedSource<TItem extends FeedItem = FeedItem> {
 
 ### Changes to FeedItem
 
-One optional field added.
+Optional fields added for actions, server-driven UI, and LLM slots.
 
 ```typescript
 interface FeedItem<
@@ -140,6 +140,12 @@ interface FeedItem<
 
 	/** Actions the user can take on this item. */
 	actions?: readonly ItemAction[]
+
+	/** Server-driven UI tree rendered by json-render on the client. */
+	ui?: JsonRenderNode
+
+	/** Named slots for LLM-fillable content. See architecture-draft.md. */
+	slots?: Record<string, Slot>
 }
 ```
 
@@ -222,6 +228,25 @@ class SpotifySource implements FeedSource<SpotifyFeedItem> {
 					{ actionId: "skip-track" },
 					{ actionId: "like-track", params: { trackId: track.id } },
 				],
+				ui: {
+					type: "View",
+					className: "flex-row items-center p-3 gap-3 bg-white dark:bg-black rounded-xl",
+					children: [
+						{
+							type: "Image",
+							source: { uri: track.albumArt },
+							className: "w-12 h-12 rounded-lg",
+						},
+						{
+							type: "View",
+							className: "flex-1",
+							children: [
+								{ type: "Text", className: "font-semibold text-black dark:text-white", text: track.name },
+								{ type: "Text", className: "text-sm text-gray-500 dark:text-gray-400", text: track.artist },
+							],
+						},
+					],
+				},
 			},
 		]
 	}
@@ -236,6 +261,8 @@ class SpotifySource implements FeedSource<SpotifyFeedItem> {
 4. `FeedSource.listActions()` is a required method returning `Record<string, ActionDefinition>` (empty record if no actions)
 5. `FeedSource.executeAction()` is a required method (no-op for sources without actions)
 6. `FeedItem.actions` is an optional readonly array of `ItemAction`
+6b. `FeedItem.ui` is an optional json-render tree describing server-driven UI
+6c. `FeedItem.slots` is an optional record of named LLM-fillable slots
 7. `FeedEngine.executeAction()` routes to correct source, returns `ActionResult`
 8. `FeedEngine.listActions()` aggregates actions from all sources
 9. Existing tests pass unchanged (all changes are additive)

packages/aris-core/src/context-bridge.ts

@@ -1,8 +1,10 @@
-import type { Context } from "./context"
+import type { ContextEntry } from "./context"
 import type { ContextProvider } from "./context-provider"
 
+import { contextKey } from "./context"
+
 interface ContextUpdatable {
-	pushContextUpdate(update: Partial<Context>): void
+	pushContextUpdate(entries: readonly ContextEntry[]): void
 }
 
 export interface ProviderError {
@@ -54,7 +56,7 @@ export class ContextBridge {
 		this.providers.set(provider.key, provider as ContextProvider)
 
 		const cleanup = provider.onUpdate((value) => {
-			this.controller.pushContextUpdate({ [provider.key]: value })
+			this.controller.pushContextUpdate([[contextKey(provider.key), value]])
 		})
 		this.cleanups.push(cleanup)
 
@@ -67,7 +69,7 @@ export class ContextBridge {
 	 * Returns errors from providers that failed to fetch.
 	 */
 	async refresh(): Promise<RefreshResult> {
-		const updates: Partial<Context> = {}
+		const collected: ContextEntry[] = []
 		const errors: ProviderError[] = []
 
 		const entries = Array.from(this.providers.entries())
@@ -78,7 +80,7 @@ export class ContextBridge {
 		entries.forEach(([key], i) => {
 			const result = results[i]
 			if (result?.status === "fulfilled") {
-				updates[key] = result.value
+				collected.push([contextKey(key), result.value])
 			} else if (result?.status === "rejected") {
 				errors.push({
 					key,
@@ -87,7 +89,7 @@ export class ContextBridge {
 			}
 		})
 
-		this.controller.pushContextUpdate(updates)
+		this.controller.pushContextUpdate(collected)
 
 		return { errors }
 	}

packages/aris-core/src/context.test.ts

@@ -0,0 +1,184 @@
+import { describe, expect, test } from "bun:test"
+
+import type { ContextKey } from "./context"
+
+import { Context, contextKey } from "./context"
+
+interface Weather {
+	temperature: number
+}
+
+interface NextEvent {
+	title: string
+}
+
+const WeatherKey: ContextKey<Weather> = contextKey("aris.weather", "current")
+const NextEventKey: ContextKey<NextEvent> = contextKey("aris.google-calendar", "nextEvent")
+
+describe("Context", () => {
+	describe("get", () => {
+		test("returns undefined for missing key", () => {
+			const ctx = new Context()
+			expect(ctx.get(WeatherKey)).toBeUndefined()
+		})
+
+		test("returns value for exact key match", () => {
+			const ctx = new Context()
+			const weather: Weather = { temperature: 20 }
+			ctx.set([[WeatherKey, weather]])
+
+			expect(ctx.get(WeatherKey)).toEqual(weather)
+		})
+
+		test("distinguishes keys with different parts", () => {
+			const ctx = new Context()
+			ctx.set([
+				[WeatherKey, { temperature: 20 }],
+				[NextEventKey, { title: "Standup" }],
+			])
+
+			expect(ctx.get(WeatherKey)).toEqual({ temperature: 20 })
+			expect(ctx.get(NextEventKey)).toEqual({ title: "Standup" })
+		})
+
+		test("last write wins for same key", () => {
+			const ctx = new Context()
+			ctx.set([[WeatherKey, { temperature: 20 }]])
+			ctx.set([[WeatherKey, { temperature: 25 }]])
+
+			expect(ctx.get(WeatherKey)).toEqual({ temperature: 25 })
+		})
+	})
+
+	describe("find", () => {
+		test("returns empty array when no keys match", () => {
+			const ctx = new Context()
+			expect(ctx.find(WeatherKey)).toEqual([])
+		})
+
+		test("returns exact match as single result", () => {
+			const ctx = new Context()
+			ctx.set([[NextEventKey, { title: "Standup" }]])
+
+			const results = ctx.find(NextEventKey)
+			expect(results).toHaveLength(1)
+			expect(results[0]!.value).toEqual({ title: "Standup" })
+		})
+
+		test("prefix match returns multiple instances", () => {
+			const workKey = contextKey<NextEvent>("aris.google-calendar", "nextEvent", {
+				account: "work",
+			})
+			const personalKey = contextKey<NextEvent>("aris.google-calendar", "nextEvent", {
+				account: "personal",
+			})
+
+			const ctx = new Context()
+			ctx.set([
+				[workKey, { title: "Sprint Planning" }],
+				[personalKey, { title: "Dentist" }],
+			])
+
+			const prefix = contextKey<NextEvent>("aris.google-calendar", "nextEvent")
+			const results = ctx.find(prefix)
+
+			expect(results).toHaveLength(2)
+			const titles = results.map((r) => r.value.title).sort()
+			expect(titles).toEqual(["Dentist", "Sprint Planning"])
+		})
+
+		test("prefix match includes exact match and longer keys", () => {
+			const baseKey = contextKey<NextEvent>("aris.google-calendar", "nextEvent")
+			const instanceKey = contextKey<NextEvent>("aris.google-calendar", "nextEvent", {
+				account: "work",
+			})
+
+			const ctx = new Context()
+			ctx.set([
+				[baseKey, { title: "Base" }],
+				[instanceKey, { title: "Instance" }],
+			])
+
+			const results = ctx.find(baseKey)
+			expect(results).toHaveLength(2)
+		})
+
+		test("does not match keys that share a string prefix but differ at segment boundary", () => {
+			const keyA = contextKey<string>("aris.calendar", "next")
+			const keyB = contextKey<string>("aris.calendar", "nextEvent")
+
+			const ctx = new Context()
+			ctx.set([
+				[keyA, "a"],
+				[keyB, "b"],
+			])
+
+			const results = ctx.find(keyA)
+			expect(results).toHaveLength(1)
+			expect(results[0]!.value).toBe("a")
+		})
+
+		test("object key parts with different property order match", () => {
+			const key1 = contextKey<string>("source", "ctx", { b: 2, a: 1 })
+			const key2 = contextKey<string>("source", "ctx", { a: 1, b: 2 })
+
+			const ctx = new Context()
+			ctx.set([[key1, "value"]])
+
+			// Exact match via get should work regardless of property order
+			expect(ctx.get(key2)).toBe("value")
+
+			// find with the reordered key as prefix should also match
+			const prefix = contextKey<string>("source", "ctx")
+			const results = ctx.find(prefix)
+			expect(results).toHaveLength(1)
+		})
+
+		test("single-segment prefix matches all keys starting with that segment", () => {
+			const ctx = new Context()
+			ctx.set([
+				[contextKey("aris.weather", "current"), { temperature: 20 }],
+				[contextKey("aris.weather", "forecast"), { high: 25 }],
+				[contextKey("aris.calendar", "nextEvent"), { title: "Meeting" }],
+			])
+
+			const results = ctx.find(contextKey("aris.weather"))
+			expect(results).toHaveLength(2)
+		})
+
+		test("does not match shorter keys", () => {
+			const ctx = new Context()
+			ctx.set([[contextKey("aris.weather"), "short"]])
+
+			const results = ctx.find(contextKey("aris.weather", "current"))
+			expect(results).toHaveLength(0)
+		})
+
+		test("numeric key parts match correctly", () => {
+			const ctx = new Context()
+			ctx.set([
+				[contextKey("source", 1, "data"), "one"],
+				[contextKey("source", 2, "data"), "two"],
+			])
+
+			const results = ctx.find(contextKey("source", 1))
+			expect(results).toHaveLength(1)
+			expect(results[0]!.value).toBe("one")
+		})
+	})
+
+	describe("size", () => {
+		test("returns 0 for empty context", () => {
+			expect(new Context().size).toBe(0)
+		})
+
+		test("reflects number of entries", () => {
+			const ctx = new Context()
+			ctx.set([
+				[WeatherKey, { temperature: 20 }],
+				[NextEventKey, { title: "Standup" }],
+			])
+			expect(ctx.size).toBe(2)
+		})
+	})
+})

packages/aris-core/src/context.ts

@@ -1,46 +1,128 @@
 /**
- * Branded type for type-safe context keys.
+ * Tuple-keyed context system inspired by React Query's query keys.
  *
- * Each package defines its own keys with associated value types:
- * ```ts
- * const LocationKey: ContextKey<Location> = contextKey("location")
- * ```
+ * Context keys are arrays that form a hierarchy. Sources write to specific
+ * keys (e.g., ["aris.google-calendar", "nextEvent", { account: "work" }])
+ * and consumers can query by exact match or prefix match to get all values
+ * of a given type across source instances.
  */
-export type ContextKey<T> = string & { __contextValue?: T }
 
-/**
- * Creates a typed context key.
- *
- * @example
- * ```ts
- * interface Location { lat: number; lng: number; accuracy: number }
- * const LocationKey: ContextKey<Location> = contextKey("location")
- * ```
- */
-export function contextKey<T>(key: string): ContextKey<T> {
-	return key as ContextKey<T>
+// -- Key types --
+
+/** A single segment of a context key: string, number, or a record of primitives. */
+export type ContextKeyPart = string | number | Record<string, unknown>
+
+/** A context key is a readonly tuple of parts, branded with the value type. */
+export type ContextKey<T> = readonly ContextKeyPart[] & { __contextValue?: T }
+
+/** Creates a typed context key. */
+export function contextKey<T>(...parts: ContextKeyPart[]): ContextKey<T> {
+	return parts as ContextKey<T>
 }
 
-/**
- * Type-safe accessor for context values.
- *
- * @example
- * ```ts
- * const location = contextValue(context, LocationKey)
- * if (location) {
- *   console.log(location.lat, location.lng)
- * }
- * ```
- */
-export function contextValue<T>(context: Context, key: ContextKey<T>): T | undefined {
-	return context[key] as T | undefined
-}
+// -- Serialization --
 
 /**
- * Arbitrary key-value bag representing the current state.
- * Always includes `time`. Other keys are added by context providers.
+ * Deterministic serialization of a context key for use as a Map key.
+ * Object parts have their keys sorted for stable comparison.
  */
-export interface Context {
+export function serializeKey(key: readonly ContextKeyPart[]): string {
+	return JSON.stringify(key, (_key, value) => {
+		if (value !== null && typeof value === "object" && !Array.isArray(value)) {
+			const sorted: Record<string, unknown> = {}
+			for (const k of Object.keys(value).sort()) {
+				sorted[k] = value[k]
+			}
+			return sorted
+		}
+		return value
+	})
+}
+
+// -- Key matching --
+
+/** Returns true if `key` starts with all parts of `prefix`. */
+function keyStartsWith(key: readonly ContextKeyPart[], prefix: readonly ContextKeyPart[]): boolean {
+	if (key.length < prefix.length) return false
+
+	for (let i = 0; i < prefix.length; i++) {
+		if (!partsEqual(key[i]!, prefix[i]!)) return false
+	}
+
+	return true
+}
+
+/** Recursive structural equality, matching React Query's partialMatchKey approach. */
+function partsEqual(a: unknown, b: unknown): boolean {
+	if (a === b) return true
+	if (typeof a !== typeof b) return false
+	if (a && b && typeof a === "object" && typeof b === "object") {
+		const aKeys = Object.keys(a)
+		const bKeys = Object.keys(b)
+		if (aKeys.length !== bKeys.length) return false
+		return aKeys.every((key) =>
+			partsEqual((a as Record<string, unknown>)[key], (b as Record<string, unknown>)[key]),
+		)
+	}
+	return false
+}
+
+// -- Context store --
+
+/** A single context entry: a key-value pair. */
+export type ContextEntry<T = unknown> = readonly [ContextKey<T>, T]
+
+/**
+ * Mutable context store with tuple keys.
+ *
+ * Supports exact-match lookups and prefix-match queries.
+ * Sources write context in topological order during refresh.
+ */
+export class Context {
 	time: Date
-	[key: string]: unknown
+	private readonly store: Map<string, { key: readonly ContextKeyPart[]; value: unknown }>
+
+	constructor(time: Date = new Date()) {
+		this.time = time
+		this.store = new Map()
+	}
+
+	/** Merges entries into this context. */
+	set(entries: readonly ContextEntry[]): void {
+		for (const [key, value] of entries) {
+			this.store.set(serializeKey(key), { key, value })
+		}
+	}
+
+	/** Exact-match lookup. Returns the value for the given key, or undefined. */
+	get<T>(key: ContextKey<T>): T | undefined {
+		const entry = this.store.get(serializeKey(key))
+		return entry?.value as T | undefined
+	}
+
+	/**
+	 * Prefix-match query. Returns all entries whose key starts with the given prefix.
+	 *
+	 * @example
+	 * ```ts
+	 * // Get all "nextEvent" values across calendar source instances
+	 * const events = context.find(contextKey("nextEvent"))
+	 * ```
+	 */
+	find<T>(prefix: ContextKey<T>): Array<{ key: readonly ContextKeyPart[]; value: T }> {
+		const results: Array<{ key: readonly ContextKeyPart[]; value: T }> = []
+
+		for (const entry of this.store.values()) {
+			if (keyStartsWith(entry.key, prefix)) {
+				results.push({ key: entry.key, value: entry.value as T })
+			}
+		}
+
+		return results
+	}
+
+	/** Returns the number of entries (excluding time). */
+	get size(): number {
+		return this.store.size
+	}
 }

packages/aris-core/src/data-source.ts

@@ -12,15 +12,15 @@ import type { FeedItem } from "./feed"
  *   readonly type = "weather"
  *
  *   async query(context: Context): Promise<WeatherItem[]> {
- *     const location = contextValue(context, LocationKey)
+ *     const location = context.get(LocationKey)
  *     if (!location) return []
  *     const data = await fetchWeather(location)
  *     return [{
  *       id: `weather-${Date.now()}`,
  *       type: this.type,
- *       priority: 0.5,
  *       timestamp: context.time,
  *       data: { temp: data.temperature },
+ *       signals: { urgency: 0.5, timeRelevance: "ambient" },
  *     }]
  *   }
  * }

packages/aris-core/src/feed-controller.ts

@@ -1,8 +1,9 @@
-import type { Context } from "./context"
+import type { ContextEntry } from "./context"
 import type { DataSource } from "./data-source"
 import type { FeedItem } from "./feed"
 import type { ReconcileResult } from "./reconciler"
 
+import { Context } from "./context"
 import { Reconciler } from "./reconciler"
 
 export interface FeedControllerConfig {
@@ -40,7 +41,7 @@ const DEFAULT_DEBOUNCE_MS = 100
  * })
  *
  * // Context update triggers debounced reconcile
- * controller.pushContextUpdate({ [LocationKey]: location })
+ * controller.pushContextUpdate([[LocationKey, location]])
  *
  * // Direct reconcile (no debounce)
  * const result = await controller.reconcile()
@@ -59,7 +60,7 @@ export class FeedController<TItems extends FeedItem = never> {
 	private stopped = false
 
 	constructor(config?: FeedControllerConfig) {
-		this.context = config?.initialContext ?? { time: new Date() }
+		this.context = config?.initialContext ?? new Context()
 		this.debounceMs = config?.debounceMs ?? DEFAULT_DEBOUNCE_MS
 		this.timeout = config?.timeout
 	}
@@ -94,9 +95,10 @@ export class FeedController<TItems extends FeedItem = never> {
 		}
 	}
 
-	/** Merges update into context and schedules a debounced reconcile. */
-	pushContextUpdate(update: Partial<Context>): void {
-		this.context = { ...this.context, ...update, time: new Date() }
+	/** Merges entries into context and schedules a debounced reconcile. */
+	pushContextUpdate(entries: readonly ContextEntry[]): void {
+		this.context.time = new Date()
+		this.context.set(entries)
 		this.scheduleReconcile()
 	}
 

packages/aris-core/src/feed-engine.test.ts

@@ -1,9 +1,9 @@
 import { describe, expect, test } from "bun:test"
 
-import type { ActionDefinition, Context, ContextKey, FeedItem, FeedSource } from "./index"
+import type { ActionDefinition, ContextEntry, ContextKey, FeedItem, FeedSource } from "./index"
 
 import { FeedEngine } from "./feed-engine"
-import { UnknownActionError, contextKey, contextValue } from "./index"
+import { Context, TimeRelevance, UnknownActionError, contextKey } from "./index"
 
 // No-op action methods for test sources
 const noActions = {
@@ -48,7 +48,7 @@ interface SimulatedLocationSource extends FeedSource {
 }
 
 function createLocationSource(): SimulatedLocationSource {
-	let callback: ((update: Partial<Context>) => void) | null = null
+	let callback: ((entries: readonly ContextEntry[]) => void) | null = null
 	let currentLocation: Location = { lat: 0, lng: 0 }
 
 	return {
@@ -63,12 +63,12 @@ function createLocationSource(): SimulatedLocationSource {
 		},
 
 		async fetchContext() {
-			return { [LocationKey]: currentLocation }
+			return [[LocationKey, currentLocation]]
 		},
 
 		simulateUpdate(location: Location) {
 			currentLocation = location
-			callback?.({ [LocationKey]: location })
+			callback?.([[LocationKey, location]])
 		},
 	}
 }
@@ -85,27 +85,27 @@ function createWeatherSource(
 		...noActions,
 
 		async fetchContext(context) {
-			const location = contextValue(context, LocationKey)
+			const location = context.get(LocationKey)
 			if (!location) return null
 
 			const weather = await fetchWeather(location)
-			return { [WeatherKey]: weather }
+			return [[WeatherKey, weather]]
 		},
 
 		async fetchItems(context) {
-			const weather = contextValue(context, WeatherKey)
+			const weather = context.get(WeatherKey)
 			if (!weather) return []
 
 			return [
 				{
 					id: `weather-${Date.now()}`,
 					type: "weather",
-					priority: 0.5,
 					timestamp: new Date(),
 					data: {
 						temperature: weather.temperature,
 						condition: weather.condition,
 					},
+					signals: { urgency: 0.5, timeRelevance: TimeRelevance.Ambient },
 				},
 			]
 		},
@@ -123,7 +123,7 @@ function createAlertSource(): FeedSource<AlertFeedItem> {
 		},
 
 		async fetchItems(context) {
-			const weather = contextValue(context, WeatherKey)
+			const weather = context.get(WeatherKey)
 			if (!weather) return []
 
 			if (weather.condition === "storm") {
@@ -131,9 +131,9 @@ function createAlertSource(): FeedSource<AlertFeedItem> {
 					{
 						id: "alert-storm",
 						type: "alert",
-						priority: 1.0,
 						timestamp: new Date(),
 						data: { message: "Storm warning!" },
+						signals: { urgency: 1.0, timeRelevance: TimeRelevance.Imminent },
 					},
 				]
 			}
@@ -265,7 +265,7 @@ describe("FeedEngine", () => {
 				...noActions,
 				async fetchContext() {
 					order.push("location")
-					return { [LocationKey]: { lat: 51.5, lng: -0.1 } }
+					return [[LocationKey, { lat: 51.5, lng: -0.1 }]]
 				},
 			}
 
@@ -275,9 +275,9 @@ describe("FeedEngine", () => {
 				...noActions,
 				async fetchContext(ctx) {
 					order.push("weather")
-					const loc = contextValue(ctx, LocationKey)
+					const loc = ctx.get(LocationKey)
 					expect(loc).toBeDefined()
-					return { [WeatherKey]: { temperature: 20, condition: "sunny" } }
+					return [[WeatherKey, { temperature: 20, condition: "sunny" }]]
 				},
 			}
 
@@ -298,11 +298,11 @@ describe("FeedEngine", () => {
 
 			const { context } = await engine.refresh()
 
-			expect(contextValue(context, LocationKey)).toEqual({
+			expect(context.get(LocationKey)).toEqual({
 				lat: 51.5,
 				lng: -0.1,
 			})
-			expect(contextValue(context, WeatherKey)).toEqual({
+			expect(context.get(WeatherKey)).toEqual({
 				temperature: 20,
 				condition: "sunny",
 			})
@@ -322,7 +322,7 @@ describe("FeedEngine", () => {
 			expect(items[0]!.type).toBe("weather")
 		})
 
-		test("sorts items by priority descending", async () => {
+		test("returns items in source graph order (no engine-level sorting)", async () => {
 			const location = createLocationSource()
 			location.simulateUpdate({ lat: 51.5, lng: -0.1 })
 
@@ -338,8 +338,12 @@ describe("FeedEngine", () => {
 			const { items } = await engine.refresh()
 
 			expect(items).toHaveLength(2)
-			expect(items[0]!.type).toBe("alert") // priority 1.0
-			expect(items[1]!.type).toBe("weather") // priority 0.5
+			// Items returned in topological order (weather before alert)
+			expect(items[0]!.type).toBe("weather")
+			expect(items[1]!.type).toBe("alert")
+			// Signals are preserved for post-processors to consume
+			expect(items[0]!.signals?.urgency).toBe(0.5)
+			expect(items[1]!.signals?.urgency).toBe(1.0)
 		})
 
 		test("handles missing upstream context gracefully", async () => {
@@ -357,7 +361,7 @@ describe("FeedEngine", () => {
 
 			const { context, items } = await engine.refresh()
 
-			expect(contextValue(context, WeatherKey)).toBeUndefined()
+			expect(context.get(WeatherKey)).toBeUndefined()
 			expect(items).toHaveLength(0)
 		})
 
@@ -455,7 +459,7 @@ describe("FeedEngine", () => {
 			await engine.refresh()
 
 			const context = engine.currentContext()
-			expect(contextValue(context, LocationKey)).toEqual({
+			expect(context.get(LocationKey)).toEqual({
 				lat: 51.5,
 				lng: -0.1,
 			})
@@ -730,7 +734,7 @@ describe("FeedEngine", () => {
 		})
 
 		test("reactive item update refreshes cache", async () => {
-			let itemUpdateCallback: (() => void) | null = null
+			let itemUpdateCallback: ((items: FeedItem[]) => void) | null = null
 
 			const source: FeedSource = {
 				id: "reactive-items",
@@ -761,7 +765,7 @@ describe("FeedEngine", () => {
 			engine.start()
 
 			// Trigger item update
-			itemUpdateCallback!()
+			itemUpdateCallback!([])
 
 			// Wait for async refresh
 			await new Promise((resolve) => setTimeout(resolve, 50))
@@ -881,12 +885,12 @@ describe("FeedEngine", () => {
 				...noActions,
 				async fetchContext(ctx) {
 					fetchCount++
-					const loc = contextValue(ctx, LocationKey)
+					const loc = ctx.get(LocationKey)
 					if (!loc) return null
-					return { [WeatherKey]: { temperature: 20, condition: "sunny" } }
+					return [[WeatherKey, { temperature: 20, condition: "sunny" }]]
 				},
 				async fetchItems(ctx) {
-					const weather = contextValue(ctx, WeatherKey)
+					const weather = ctx.get(WeatherKey)
 					if (!weather) return []
 					return [
 						{

packages/aris-core/src/feed-engine.ts

@@ -1,8 +1,11 @@
 import type { ActionDefinition } from "./action"
-import type { Context } from "./context"
+import type { ContextEntry } from "./context"
 import type { FeedItem } from "./feed"
+import type { FeedPostProcessor, ItemGroup } from "./feed-post-processor"
 import type { FeedSource } from "./feed-source"
 
+import { Context } from "./context"
+
 export interface SourceError {
 	sourceId: string
 	error: Error
@@ -12,6 +15,8 @@ export interface FeedResult<TItem extends FeedItem = FeedItem> {
 	context: Context
 	items: TItem[]
 	errors: SourceError[]
+	/** Item groups produced by post-processors */
+	groupedItems?: ItemGroup[]
 }
 
 export type FeedSubscriber<TItem extends FeedItem = FeedItem> = (result: FeedResult<TItem>) => void
@@ -62,10 +67,11 @@ interface SourceGraph {
 export class FeedEngine<TItems extends FeedItem = FeedItem> {
 	private sources = new Map<string, FeedSource>()
 	private graph: SourceGraph | null = null
-	private context: Context = { time: new Date() }
+	private context: Context = new Context()
 	private subscribers = new Set<FeedSubscriber<TItems>>()
 	private cleanups: Array<() => void> = []
 	private started = false
+	private postProcessors: FeedPostProcessor[] = []
 
 	private readonly cacheTtlMs: number
 	private cachedResult: FeedResult<TItems> | null = null
@@ -108,6 +114,23 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 		return this
 	}
 
+	/**
+	 * Registers a post-processor. Processors run in registration order
+	 * after items are collected, on every update path.
+	 */
+	registerPostProcessor(processor: FeedPostProcessor): this {
+		this.postProcessors.push(processor)
+		return this
+	}
+
+	/**
+	 * Unregisters a post-processor by reference.
+	 */
+	unregisterPostProcessor(processor: FeedPostProcessor): this {
+		this.postProcessors = this.postProcessors.filter((p) => p !== processor)
+		return this
+	}
+
 	/**
 	 * Refreshes the feed by running all sources in dependency order.
 	 * Calls fetchContext() then fetchItems() on each source.
@@ -117,14 +140,14 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 		const errors: SourceError[] = []
 
 		// Reset context with fresh time
-		let context: Context = { time: new Date() }
+		const context = new Context()
 
 		// Run fetchContext in topological order
 		for (const source of graph.sorted) {
 			try {
-				const update = await source.fetchContext(context)
-				if (update) {
-					context = { ...context, ...update }
+				const entries = await source.fetchContext(context)
+				if (entries) {
+					context.set(entries)
 				}
 			} catch (err) {
 				errors.push({
@@ -150,12 +173,20 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 			}
 		}
 
-		// Sort by priority descending
-		items.sort((a, b) => b.priority - a.priority)
-
 		this.context = context
 
-		const result: FeedResult<TItems> = { context, items: items as TItems[], errors }
+		const {
+			items: processedItems,
+			groupedItems,
+			errors: postProcessorErrors,
+		} = await this.applyPostProcessors(items as TItems[], context, errors)
+
+		const result: FeedResult<TItems> = {
+			context,
+			items: processedItems,
+			errors: postProcessorErrors,
+			...(groupedItems.length > 0 ? { groupedItems } : {}),
+		}
 		this.updateCache(result)
 
 		return result
@@ -184,8 +215,8 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 		for (const source of graph.sorted) {
 			if (source.onContextUpdate) {
 				const cleanup = source.onContextUpdate(
-					(update) => {
-						this.handleContextUpdate(source.id, update)
+					(entries) => {
+						this.handleContextUpdate(source.id, entries)
 					},
 					() => this.context,
 				)
@@ -263,6 +294,72 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 		return actions
 	}
 
+	private async applyPostProcessors(
+		items: TItems[],
+		context: Context,
+		errors: SourceError[],
+	): Promise<{ items: TItems[]; groupedItems: ItemGroup[]; errors: SourceError[] }> {
+		let currentItems = items
+		const allGroupedItems: ItemGroup[] = []
+		const allErrors = [...errors]
+		const boostScores = new Map<string, number>()
+
+		for (const processor of this.postProcessors) {
+			const snapshot = currentItems
+			try {
+				const enhancement = await processor(currentItems, context)
+
+				if (enhancement.additionalItems?.length) {
+					// Post-processors operate on FeedItem[] without knowledge of TItems.
+					// Additional items are merged untyped — this is intentional. The
+					// processor contract is "FeedItem in, FeedItem out"; type narrowing
+					// is the caller's responsibility when consuming FeedResult.
+					currentItems = [...currentItems, ...(enhancement.additionalItems as TItems[])]
+				}
+
+				if (enhancement.suppress?.length) {
+					const suppressSet = new Set(enhancement.suppress)
+					currentItems = currentItems.filter((item) => !suppressSet.has(item.id))
+				}
+
+				if (enhancement.groupedItems?.length) {
+					allGroupedItems.push(...enhancement.groupedItems)
+				}
+
+				if (enhancement.boost) {
+					for (const [id, score] of Object.entries(enhancement.boost)) {
+						boostScores.set(id, (boostScores.get(id) ?? 0) + score)
+					}
+				}
+			} catch (err) {
+				const sourceId = processor.name || "anonymous"
+				allErrors.push({
+					sourceId,
+					error: err instanceof Error ? err : new Error(String(err)),
+				})
+				currentItems = snapshot
+			}
+		}
+
+		// Apply boost reordering: positive-boost first (desc), then zero, then negative (desc).
+		// Stable sort within each tier preserves original relative order.
+		if (boostScores.size > 0) {
+			currentItems = applyBoostOrder(currentItems, boostScores)
+		}
+
+		// Remove stale item IDs from groups and drop empty groups
+		const itemIds = new Set(currentItems.map((item) => item.id))
+		const validGroups = allGroupedItems.reduce<ItemGroup[]>((acc, group) => {
+			const ids = group.itemIds.filter((id) => itemIds.has(id))
+			if (ids.length > 0) {
+				acc.push({ ...group, itemIds: ids })
+			}
+			return acc
+		}, [])
+
+		return { items: currentItems, groupedItems: validGroups, errors: allErrors }
+	}
+
 	private ensureGraph(): SourceGraph {
 		if (!this.graph) {
 			this.graph = buildGraph(Array.from(this.sources.values()))
@@ -270,8 +367,9 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 		return this.graph
 	}
 
-	private handleContextUpdate(sourceId: string, update: Partial<Context>): void {
-		this.context = { ...this.context, ...update, time: new Date() }
+	private handleContextUpdate(sourceId: string, entries: readonly ContextEntry[]): void {
+		this.context.time = new Date()
+		this.context.set(entries)
 
 		// Re-run dependents and notify
 		this.refreshDependents(sourceId)
@@ -286,9 +384,9 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 			const source = graph.sources.get(id)
 			if (source) {
 				try {
-					const update = await source.fetchContext(this.context)
-					if (update) {
-						this.context = { ...this.context, ...update }
+					const entries = await source.fetchContext(this.context)
+					if (entries) {
+						this.context.set(entries)
 					}
 				} catch {
 					// Errors during reactive updates are logged but don't stop propagation
@@ -314,12 +412,17 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 			}
 		}
 
-		items.sort((a, b) => b.priority - a.priority)
+		const {
+			items: processedItems,
+			groupedItems,
+			errors: postProcessorErrors,
+		} = await this.applyPostProcessors(items as TItems[], this.context, errors)
 
 		const result: FeedResult<TItems> = {
 			context: this.context,
-			items: items as TItems[],
-			errors,
+			items: processedItems,
+			errors: postProcessorErrors,
+			...(groupedItems.length > 0 ? { groupedItems } : {}),
 		}
 		this.updateCache(result)
 
@@ -400,6 +503,47 @@ export class FeedEngine<TItems extends FeedItem = FeedItem> {
 	}
 }
 
+function clamp(value: number, min: number, max: number): number {
+	return Math.min(max, Math.max(min, value))
+}
+
+function applyBoostOrder<T extends FeedItem>(items: T[], boostScores: Map<string, number>): T[] {
+	const positive: T[] = []
+	const neutral: T[] = []
+	const negative: T[] = []
+
+	for (const item of items) {
+		const raw = boostScores.get(item.id)
+		if (raw === undefined || raw === 0) {
+			neutral.push(item)
+		} else {
+			const clamped = clamp(raw, -1, 1)
+			if (clamped > 0) {
+				positive.push(item)
+			} else if (clamped < 0) {
+				negative.push(item)
+			} else {
+				neutral.push(item)
+			}
+		}
+	}
+
+	// Sort positive descending by boost, negative descending (least negative first, most negative last)
+	positive.sort((a, b) => {
+		const aScore = clamp(boostScores.get(a.id) ?? 0, -1, 1)
+		const bScore = clamp(boostScores.get(b.id) ?? 0, -1, 1)
+		return bScore - aScore
+	})
+
+	negative.sort((a, b) => {
+		const aScore = clamp(boostScores.get(a.id) ?? 0, -1, 1)
+		const bScore = clamp(boostScores.get(b.id) ?? 0, -1, 1)
+		return bScore - aScore
+	})
+
+	return [...positive, ...neutral, ...negative]
+}
+
 function buildGraph(sources: FeedSource[]): SourceGraph {
 	const byId = new Map<string, FeedSource>()
 	for (const source of sources) {

packages/aris-core/src/feed-post-processor.test.ts

@@ -0,0 +1,602 @@
+import { describe, expect, mock, test } from "bun:test"
+
+import type {
+	ActionDefinition,
+	ContextEntry,
+	FeedItem,
+	FeedPostProcessor,
+	FeedSource,
+} from "./index"
+
+import { FeedEngine } from "./feed-engine"
+import { UnknownActionError } from "./index"
+
+// No-op action methods for test sources
+const noActions = {
+	async listActions(): Promise<Record<string, ActionDefinition>> {
+		return {}
+	},
+	async executeAction(actionId: string): Promise<void> {
+		throw new UnknownActionError(actionId)
+	},
+}
+
+// =============================================================================
+// FEED ITEMS
+// =============================================================================
+
+type WeatherItem = FeedItem<"weather", { temp: number }>
+type CalendarItem = FeedItem<"calendar", { title: string }>
+
+function weatherItem(id: string, temp: number): WeatherItem {
+	return { id, type: "weather", timestamp: new Date(), data: { temp } }
+}
+
+function calendarItem(id: string, title: string): CalendarItem {
+	return { id, type: "calendar", timestamp: new Date(), data: { title } }
+}
+
+// =============================================================================
+// TEST SOURCES
+// =============================================================================
+
+function createWeatherSource(items: WeatherItem[]) {
+	return {
+		id: "aris.weather",
+		...noActions,
+		async fetchContext() {
+			return null
+		},
+		async fetchItems(): Promise<WeatherItem[]> {
+			return items
+		},
+	}
+}
+
+function createCalendarSource(items: CalendarItem[]) {
+	return {
+		id: "aris.calendar",
+		...noActions,
+		async fetchContext() {
+			return null
+		},
+		async fetchItems(): Promise<CalendarItem[]> {
+			return items
+		},
+	}
+}
+
+// =============================================================================
+// REGISTRATION
+// =============================================================================
+
+describe("FeedPostProcessor", () => {
+	describe("registration", () => {
+		test("registerPostProcessor is chainable", () => {
+			const engine = new FeedEngine()
+			const processor: FeedPostProcessor = async () => ({})
+			const result = engine.registerPostProcessor(processor)
+			expect(result).toBe(engine)
+		})
+
+		test("unregisterPostProcessor is chainable", () => {
+			const engine = new FeedEngine()
+			const processor: FeedPostProcessor = async () => ({})
+			const result = engine.unregisterPostProcessor(processor)
+			expect(result).toBe(engine)
+		})
+
+		test("unregistered processor does not run", async () => {
+			const processor = mock(async () => ({}))
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(processor)
+				.unregisterPostProcessor(processor)
+
+			await engine.refresh()
+			expect(processor).not.toHaveBeenCalled()
+		})
+	})
+
+	// =============================================================================
+	// ADDITIONAL ITEMS
+	// =============================================================================
+
+	describe("additionalItems", () => {
+		test("injects additional items into the feed", async () => {
+			const extra = calendarItem("c1", "Meeting")
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => ({ additionalItems: [extra] }))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(2)
+			expect(result.items.find((i) => i.id === "c1")).toBeDefined()
+		})
+	})
+
+	// =============================================================================
+	// SUPPRESS
+	// =============================================================================
+
+	describe("suppress", () => {
+		test("removes suppressed items from the feed", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ suppress: ["w1"] }))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(1)
+			expect(result.items[0].id).toBe("w2")
+		})
+
+		test("suppressing nonexistent ID is a no-op", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => ({ suppress: ["nonexistent"] }))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(1)
+		})
+	})
+
+	// =============================================================================
+	// GROUPED ITEMS
+	// =============================================================================
+
+	describe("groupedItems", () => {
+		test("accumulates grouped items on FeedResult", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createCalendarSource([calendarItem("c1", "Meeting A"), calendarItem("c2", "Meeting B")]),
+				)
+				.registerPostProcessor(async () => ({
+					groupedItems: [{ itemIds: ["c1", "c2"], summary: "Busy afternoon" }],
+				}))
+
+			const result = await engine.refresh()
+			expect(result.groupedItems).toEqual([{ itemIds: ["c1", "c2"], summary: "Busy afternoon" }])
+		})
+
+		test("multiple processors accumulate groups", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createCalendarSource([calendarItem("c1", "Meeting A"), calendarItem("c2", "Meeting B")]),
+				)
+				.registerPostProcessor(async () => ({
+					groupedItems: [{ itemIds: ["c1"], summary: "Group A" }],
+				}))
+				.registerPostProcessor(async () => ({
+					groupedItems: [{ itemIds: ["c2"], summary: "Group B" }],
+				}))
+
+			const result = await engine.refresh()
+			expect(result.groupedItems).toEqual([
+				{ itemIds: ["c1"], summary: "Group A" },
+				{ itemIds: ["c2"], summary: "Group B" },
+			])
+		})
+
+		test("stale item IDs are removed from groups after suppression", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createCalendarSource([calendarItem("c1", "Meeting A"), calendarItem("c2", "Meeting B")]),
+				)
+				.registerPostProcessor(async () => ({
+					groupedItems: [{ itemIds: ["c1", "c2"], summary: "Afternoon" }],
+				}))
+				.registerPostProcessor(async () => ({ suppress: ["c1"] }))
+
+			const result = await engine.refresh()
+			expect(result.groupedItems).toEqual([{ itemIds: ["c2"], summary: "Afternoon" }])
+		})
+
+		test("groups with all items suppressed are dropped", async () => {
+			const engine = new FeedEngine()
+				.register(createCalendarSource([calendarItem("c1", "Meeting A")]))
+				.registerPostProcessor(async () => ({
+					groupedItems: [{ itemIds: ["c1"], summary: "Solo" }],
+				}))
+				.registerPostProcessor(async () => ({ suppress: ["c1"] }))
+
+			const result = await engine.refresh()
+			expect(result.groupedItems).toBeUndefined()
+		})
+
+		test("groupedItems is omitted when no processors produce groups", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => ({}))
+
+			const result = await engine.refresh()
+			expect(result.groupedItems).toBeUndefined()
+		})
+	})
+
+	// =============================================================================
+	// BOOST
+	// =============================================================================
+
+	describe("boost", () => {
+		test("positive boost moves item before non-boosted items", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ boost: { w2: 0.8 } }))
+
+			const result = await engine.refresh()
+			expect(result.items.map((i) => i.id)).toEqual(["w2", "w1"])
+		})
+
+		test("negative boost moves item after non-boosted items", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ boost: { w1: -0.5 } }))
+
+			const result = await engine.refresh()
+			expect(result.items.map((i) => i.id)).toEqual(["w2", "w1"])
+		})
+
+		test("multiple boosted items are sorted by boost descending", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createWeatherSource([
+						weatherItem("w1", 20),
+						weatherItem("w2", 25),
+						weatherItem("w3", 30),
+					]),
+				)
+				.registerPostProcessor(async () => ({
+					boost: { w3: 0.3, w1: 0.9 },
+				}))
+
+			const result = await engine.refresh()
+			// w1 (0.9) first, w3 (0.3) second, w2 (no boost) last
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "w3", "w2"])
+		})
+
+		test("multiple processors accumulate boost scores", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ boost: { w1: 0.3 } }))
+				.registerPostProcessor(async () => ({ boost: { w1: 0.4 } }))
+
+			const result = await engine.refresh()
+			// w1 accumulated boost = 0.7, moves before w2
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "w2"])
+		})
+
+		test("accumulated boost is clamped to [-1, 1]", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createWeatherSource([
+						weatherItem("w1", 20),
+						weatherItem("w2", 25),
+						weatherItem("w3", 30),
+					]),
+				)
+				.registerPostProcessor(async () => ({ boost: { w1: 0.8, w2: 0.9 } }))
+				.registerPostProcessor(async () => ({ boost: { w1: 0.8 } }))
+
+			const result = await engine.refresh()
+			// w1 accumulated = 1.6 clamped to 1, w2 = 0.9 — w1 still first
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "w2", "w3"])
+		})
+
+		test("out-of-range boost values are clamped", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ boost: { w1: 5.0 } }))
+
+			const result = await engine.refresh()
+			// Clamped to 1, still boosted to front
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "w2"])
+		})
+
+		test("boosting a suppressed item is a no-op", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({
+					suppress: ["w1"],
+					boost: { w1: 1.0 },
+				}))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(1)
+			expect(result.items[0].id).toBe("w2")
+		})
+
+		test("boosting a nonexistent item ID is a no-op", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => ({ boost: { nonexistent: 1.0 } }))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(1)
+			expect(result.items[0].id).toBe("w1")
+		})
+
+		test("items with equal boost retain original relative order", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createWeatherSource([
+						weatherItem("w1", 20),
+						weatherItem("w2", 25),
+						weatherItem("w3", 30),
+					]),
+				)
+				.registerPostProcessor(async () => ({
+					boost: { w1: 0.5, w3: 0.5 },
+				}))
+
+			const result = await engine.refresh()
+			// w1 and w3 have equal boost — original order preserved: w1 before w3
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "w3", "w2"])
+		})
+
+		test("negative boosts preserve relative order among demoted items", async () => {
+			const engine = new FeedEngine()
+				.register(
+					createWeatherSource([
+						weatherItem("w1", 20),
+						weatherItem("w2", 25),
+						weatherItem("w3", 30),
+					]),
+				)
+				.registerPostProcessor(async () => ({
+					boost: { w1: -0.3, w2: -0.3 },
+				}))
+
+			const result = await engine.refresh()
+			// w3 (neutral) first, then w1 and w2 (equal negative) in original order
+			expect(result.items.map((i) => i.id)).toEqual(["w3", "w1", "w2"])
+		})
+
+		test("boost works alongside additionalItems and groupedItems", async () => {
+			const extra = calendarItem("c1", "Meeting")
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({
+					additionalItems: [extra],
+					boost: { c1: 1.0 },
+					groupedItems: [{ itemIds: ["w1", "c1"], summary: "Related" }],
+				}))
+
+			const result = await engine.refresh()
+			// c1 boosted to front
+			expect(result.items[0].id).toBe("c1")
+			expect(result.items).toHaveLength(3)
+			expect(result.groupedItems).toEqual([{ itemIds: ["w1", "c1"], summary: "Related" }])
+		})
+	})
+
+	// =============================================================================
+	// PIPELINE ORDERING
+	// =============================================================================
+
+	describe("pipeline ordering", () => {
+		test("each processor sees items as modified by the previous processor", async () => {
+			const seen: string[] = []
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => ({
+					additionalItems: [calendarItem("c1", "Injected")],
+				}))
+				.registerPostProcessor(async (items) => {
+					seen.push(...items.map((i) => i.id))
+					return {}
+				})
+
+			await engine.refresh()
+			expect(seen).toEqual(["w1", "c1"])
+		})
+
+		test("suppression in first processor affects second processor", async () => {
+			const seen: string[] = []
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({ suppress: ["w1"] }))
+				.registerPostProcessor(async (items) => {
+					seen.push(...items.map((i) => i.id))
+					return {}
+				})
+
+			await engine.refresh()
+			expect(seen).toEqual(["w2"])
+		})
+	})
+
+	// =============================================================================
+	// ERROR HANDLING
+	// =============================================================================
+
+	describe("error handling", () => {
+		test("throwing processor is recorded in errors and pipeline continues", async () => {
+			const seen: string[] = []
+
+			async function failingProcessor(): Promise<never> {
+				throw new Error("processor failed")
+			}
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(failingProcessor)
+				.registerPostProcessor(async (items) => {
+					seen.push(...items.map((i) => i.id))
+					return {}
+				})
+
+			const result = await engine.refresh()
+
+			const ppError = result.errors.find((e) => e.sourceId === "failingProcessor")
+			expect(ppError).toBeDefined()
+			expect(ppError!.error.message).toBe("processor failed")
+
+			// Pipeline continued — observer still saw the original item
+			expect(seen).toEqual(["w1"])
+			expect(result.items).toHaveLength(1)
+		})
+
+		test("anonymous throwing processor uses 'anonymous' as sourceId", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(async () => {
+					throw new Error("anon failed")
+				})
+
+			const result = await engine.refresh()
+			const ppError = result.errors.find((e) => e.sourceId === "anonymous")
+			expect(ppError).toBeDefined()
+		})
+
+		test("non-Error throw is wrapped", async () => {
+			async function failingProcessor(): Promise<never> {
+				throw "string error"
+			}
+
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20)]))
+				.registerPostProcessor(failingProcessor)
+
+			const result = await engine.refresh()
+			const ppError = result.errors.find((e) => e.sourceId === "failingProcessor")
+			expect(ppError).toBeDefined()
+			expect(ppError!.error).toBeInstanceOf(Error)
+		})
+	})
+
+	// =============================================================================
+	// REACTIVE PATHS
+	// =============================================================================
+
+	describe("reactive updates", () => {
+		test("post-processors run during reactive context updates", async () => {
+			let callCount = 0
+
+			let triggerUpdate: ((entries: readonly ContextEntry[]) => void) | null = null
+
+			const source: FeedSource = {
+				id: "aris.reactive",
+				...noActions,
+				async fetchContext() {
+					return null
+				},
+				async fetchItems() {
+					return [weatherItem("w1", 20)]
+				},
+				onContextUpdate(callback, _getContext) {
+					triggerUpdate = callback
+					return () => {
+						triggerUpdate = null
+					}
+				},
+			}
+
+			const engine = new FeedEngine().register(source).registerPostProcessor(async () => {
+				callCount++
+				return {}
+			})
+
+			engine.start()
+
+			// Wait for initial periodic refresh
+			await new Promise((resolve) => setTimeout(resolve, 50))
+			const countAfterStart = callCount
+
+			// Trigger a reactive context update
+			triggerUpdate!([])
+			await new Promise((resolve) => setTimeout(resolve, 50))
+
+			expect(callCount).toBeGreaterThan(countAfterStart)
+
+			engine.stop()
+		})
+
+		test("post-processors run during reactive item updates", async () => {
+			let callCount = 0
+
+			let triggerItemsUpdate: ((items: FeedItem[]) => void) | null = null
+
+			const source: FeedSource = {
+				id: "aris.reactive",
+				...noActions,
+				async fetchContext() {
+					return null
+				},
+				async fetchItems() {
+					return [weatherItem("w1", 20)]
+				},
+				onItemsUpdate(callback, _getContext) {
+					triggerItemsUpdate = callback
+					return () => {
+						triggerItemsUpdate = null
+					}
+				},
+			}
+
+			const engine = new FeedEngine().register(source).registerPostProcessor(async () => {
+				callCount++
+				return {}
+			})
+
+			engine.start()
+
+			await new Promise((resolve) => setTimeout(resolve, 50))
+			const countAfterStart = callCount
+
+			// Trigger a reactive items update
+			triggerItemsUpdate!([weatherItem("w1", 25)])
+			await new Promise((resolve) => setTimeout(resolve, 50))
+
+			expect(callCount).toBeGreaterThan(countAfterStart)
+
+			engine.stop()
+		})
+	})
+
+	// =============================================================================
+	// NO PROCESSORS = NO CHANGE
+	// =============================================================================
+
+	describe("no processors", () => {
+		test("engine without post-processors returns raw items unchanged", async () => {
+			const items = [weatherItem("w1", 20), weatherItem("w2", 25)]
+			const engine = new FeedEngine().register(createWeatherSource(items))
+
+			const result = await engine.refresh()
+			expect(result.items).toHaveLength(2)
+			expect(result.items[0].id).toBe("w1")
+			expect(result.items[1].id).toBe("w2")
+			expect(result.groupedItems).toBeUndefined()
+		})
+	})
+
+	// =============================================================================
+	// COMBINED ENHANCEMENT
+	// =============================================================================
+
+	describe("combined enhancement", () => {
+		test("single processor can use all enhancement fields at once", async () => {
+			const engine = new FeedEngine()
+				.register(createWeatherSource([weatherItem("w1", 20), weatherItem("w2", 25)]))
+				.registerPostProcessor(async () => ({
+					additionalItems: [calendarItem("c1", "Injected")],
+					suppress: ["w2"],
+					groupedItems: [{ itemIds: ["w1", "c1"], summary: "Related" }],
+				}))
+
+			const result = await engine.refresh()
+
+			// w2 suppressed, c1 injected → w1 + c1
+			expect(result.items).toHaveLength(2)
+			expect(result.items.map((i) => i.id)).toEqual(["w1", "c1"])
+
+			// Groups on result
+			expect(result.groupedItems).toEqual([{ itemIds: ["w1", "c1"], summary: "Related" }])
+		})
+	})
+})

packages/aris-core/src/feed-post-processor.ts

@@ -0,0 +1,26 @@
+import type { Context } from "./context"
+import type { FeedItem } from "./feed"
+
+export interface ItemGroup {
+	/** IDs of items to present together */
+	itemIds: string[]
+	/** Summary text for the group */
+	summary: string
+}
+
+export interface FeedEnhancement {
+	/** New items to inject into the feed */
+	additionalItems?: FeedItem[]
+	/** Groups of items to present together with a summary */
+	groupedItems?: ItemGroup[]
+	/** Item IDs to remove from the feed */
+	suppress?: string[]
+	/** Map of item ID to boost score (-1 to 1). Positive promotes, negative demotes. */
+	boost?: Record<string, number>
+}
+
+/**
+ * A function that transforms feed items and produces enhancement directives.
+ * Use named functions for meaningful error attribution.
+ */
+export type FeedPostProcessor = (items: FeedItem[], context: Context) => Promise<FeedEnhancement>

packages/aris-core/src/feed-source.test.ts

@@ -1,8 +1,8 @@
 import { describe, expect, test } from "bun:test"
 
-import type { ActionDefinition, Context, ContextKey, FeedItem, FeedSource } from "./index"
+import type { ActionDefinition, ContextEntry, ContextKey, FeedItem, FeedSource } from "./index"
 
-import { UnknownActionError, contextKey, contextValue } from "./index"
+import { Context, TimeRelevance, UnknownActionError, contextKey } from "./index"
 
 // No-op action methods for test sources
 const noActions = {
@@ -47,7 +47,7 @@ interface SimulatedLocationSource extends FeedSource {
 }
 
 function createLocationSource(): SimulatedLocationSource {
-	let callback: ((update: Partial<Context>) => void) | null = null
+	let callback: ((entries: readonly ContextEntry[]) => void) | null = null
 	let currentLocation: Location = { lat: 0, lng: 0 }
 
 	return {
@@ -62,12 +62,12 @@ function createLocationSource(): SimulatedLocationSource {
 		},
 
 		async fetchContext() {
-			return { [LocationKey]: currentLocation }
+			return [[LocationKey, currentLocation]]
 		},
 
 		simulateUpdate(location: Location) {
 			currentLocation = location
-			callback?.({ [LocationKey]: location })
+			callback?.([[LocationKey, location]])
 		},
 	}
 }
@@ -84,27 +84,27 @@ function createWeatherSource(
 		...noActions,
 
 		async fetchContext(context) {
-			const location = contextValue(context, LocationKey)
+			const location = context.get(LocationKey)
 			if (!location) return null
 
 			const weather = await fetchWeather(location)
-			return { [WeatherKey]: weather }
+			return [[WeatherKey, weather]]
 		},
 
 		async fetchItems(context) {
-			const weather = contextValue(context, WeatherKey)
+			const weather = context.get(WeatherKey)
 			if (!weather) return []
 
 			return [
 				{
 					id: `weather-${Date.now()}`,
 					type: "weather",
-					priority: 0.5,
 					timestamp: new Date(),
 					data: {
 						temperature: weather.temperature,
 						condition: weather.condition,
 					},
+					signals: { urgency: 0.5, timeRelevance: TimeRelevance.Ambient },
 				},
 			]
 		},
@@ -122,7 +122,7 @@ function createAlertSource(): FeedSource<AlertFeedItem> {
 		},
 
 		async fetchItems(context) {
-			const weather = contextValue(context, WeatherKey)
+			const weather = context.get(WeatherKey)
 			if (!weather) return []
 
 			if (weather.condition === "storm") {
@@ -130,9 +130,9 @@ function createAlertSource(): FeedSource<AlertFeedItem> {
 					{
 						id: "alert-storm",
 						type: "alert",
-						priority: 1.0,
 						timestamp: new Date(),
 						data: { message: "Storm warning!" },
+						signals: { urgency: 1.0, timeRelevance: TimeRelevance.Imminent },
 					},
 				]
 			}
@@ -207,13 +207,13 @@ function buildGraph(sources: FeedSource[]): SourceGraph {
 }
 
 async function refreshGraph(graph: SourceGraph): Promise<{ context: Context; items: FeedItem[] }> {
-	let context: Context = { time: new Date() }
+	const context = new Context()
 
 	// Run fetchContext in topological order
 	for (const source of graph.sorted) {
-		const update = await source.fetchContext(context)
-		if (update) {
-			context = { ...context, ...update }
+		const entries = await source.fetchContext(context)
+		if (entries) {
+			context.set(entries)
 		}
 	}
 
@@ -226,9 +226,6 @@ async function refreshGraph(graph: SourceGraph): Promise<{ context: Context; ite
 		}
 	}
 
-	// Sort by priority descending
-	items.sort((a, b) => b.priority - a.priority)
-
 	return { context, items }
 }
 
@@ -268,7 +265,7 @@ describe("FeedSource", () => {
 
 		test("source without context returns null from fetchContext", async () => {
 			const source = createAlertSource()
-			const result = await source.fetchContext({ time: new Date() })
+			const result = await source.fetchContext(new Context())
 			expect(result).toBeNull()
 		})
 	})
@@ -372,7 +369,7 @@ describe("FeedSource", () => {
 				...noActions,
 				async fetchContext() {
 					order.push("location")
-					return { [LocationKey]: { lat: 51.5, lng: -0.1 } }
+					return [[LocationKey, { lat: 51.5, lng: -0.1 }]]
 				},
 			}
 
@@ -382,9 +379,9 @@ describe("FeedSource", () => {
 				...noActions,
 				async fetchContext(ctx) {
 					order.push("weather")
-					const loc = contextValue(ctx, LocationKey)
+					const loc = ctx.get(LocationKey)
 					expect(loc).toBeDefined()
-					return { [WeatherKey]: { temperature: 20, condition: "sunny" } }
+					return [[WeatherKey, { temperature: 20, condition: "sunny" }]]
 				},
 			}
 
@@ -403,11 +400,11 @@ describe("FeedSource", () => {
 			const graph = buildGraph([location, weather])
 			const { context } = await refreshGraph(graph)
 
-			expect(contextValue(context, LocationKey)).toEqual({
+			expect(context.get(LocationKey)).toEqual({
 				lat: 51.5,
 				lng: -0.1,
 			})
-			expect(contextValue(context, WeatherKey)).toEqual({
+			expect(context.get(WeatherKey)).toEqual({
 				temperature: 20,
 				condition: "sunny",
 			})
@@ -441,17 +438,19 @@ describe("FeedSource", () => {
 			const { items } = await refreshGraph(graph)
 
 			expect(items).toHaveLength(2)
-			expect(items[0]!.type).toBe("alert") // priority 1.0
-			expect(items[1]!.type).toBe("weather") // priority 0.5
+			// Items returned in topological order (weather before alert)
+			expect(items[0]!.type).toBe("weather")
+			expect(items[1]!.type).toBe("alert")
+			// Signals preserved for post-processors
+			expect(items[0]!.signals?.urgency).toBe(0.5)
+			expect(items[1]!.signals?.urgency).toBe(1.0)
 		})
 
 		test("source without location context returns empty items", async () => {
-			// Location source exists but hasn't been updated
 			const location: FeedSource = {
 				id: "location",
 				...noActions,
 				async fetchContext() {
-					// Simulate no location available
 					return null
 				},
 			}
@@ -461,7 +460,7 @@ describe("FeedSource", () => {
 			const graph = buildGraph([location, weather])
 			const { context, items } = await refreshGraph(graph)
 
-			expect(contextValue(context, WeatherKey)).toBeUndefined()
+			expect(context.get(WeatherKey)).toBeUndefined()
 			expect(items).toHaveLength(0)
 		})
 	})
@@ -475,7 +474,7 @@ describe("FeedSource", () => {
 				() => {
 					updateCount++
 				},
-				() => ({ time: new Date() }),
+				() => new Context(),
 			)
 
 			location.simulateUpdate({ lat: 1, lng: 1 })

packages/aris-core/src/feed-source.ts

@@ -1,5 +1,5 @@
 import type { ActionDefinition } from "./action"
-import type { Context } from "./context"
+import type { Context, ContextEntry } from "./context"
 import type { FeedItem } from "./feed"
 
 /**
@@ -57,7 +57,7 @@ export interface FeedSource<TItem extends FeedItem = FeedItem> {
 	 * Maps to: source/contextUpdated (notification, source → host)
 	 */
 	onContextUpdate?(
-		callback: (update: Partial<Context>) => void,
+		callback: (entries: readonly ContextEntry[]) => void,
 		getContext: () => Context,
 	): () => void
 
@@ -67,7 +67,7 @@ export interface FeedSource<TItem extends FeedItem = FeedItem> {
 	 * Return null if this source cannot provide context.
 	 * Maps to: source/fetchContext
 	 */
-	fetchContext(context: Context): Promise<Partial<Context> | null>
+	fetchContext(context: Context): Promise<readonly ContextEntry[] | null>
 
 	/**
 	 * Subscribe to reactive feed item updates.

packages/aris-core/src/feed.test.ts

@@ -0,0 +1,87 @@
+import { describe, expect, test } from "bun:test"
+
+import type { FeedItem, Slot } from "./feed"
+
+describe("FeedItem slots", () => {
+	test("FeedItem without slots is valid", () => {
+		const item: FeedItem<"test", { value: number }> = {
+			id: "test-1",
+			type: "test",
+			timestamp: new Date(),
+			data: { value: 42 },
+		}
+
+		expect(item.slots).toBeUndefined()
+	})
+
+	test("FeedItem with unfilled slots", () => {
+		const item: FeedItem<"weather", { temp: number }> = {
+			id: "weather-1",
+			type: "weather",
+			timestamp: new Date(),
+			data: { temp: 18 },
+			slots: {
+				insight: {
+					description: "A short contextual insight about the current weather",
+					content: null,
+				},
+				"cross-source": {
+					description: "Connection between weather and calendar events",
+					content: null,
+				},
+			},
+		}
+
+		expect(item.slots).toBeDefined()
+		expect(Object.keys(item.slots!)).toEqual(["insight", "cross-source"])
+		expect(item.slots!.insight!.content).toBeNull()
+		expect(item.slots!["cross-source"]!.content).toBeNull()
+	})
+
+	test("FeedItem with filled slots", () => {
+		const item: FeedItem<"weather", { temp: number }> = {
+			id: "weather-1",
+			type: "weather",
+			timestamp: new Date(),
+			data: { temp: 18 },
+			slots: {
+				insight: {
+					description: "A short contextual insight about the current weather",
+					content: "Rain after 3pm — grab a jacket before your walk",
+				},
+			},
+		}
+
+		expect(item.slots!.insight!.content).toBe("Rain after 3pm — grab a jacket before your walk")
+	})
+
+	test("Slot interface enforces required fields", () => {
+		const slot: Slot = {
+			description: "Test slot description",
+			content: null,
+		}
+
+		expect(slot.description).toBe("Test slot description")
+		expect(slot.content).toBeNull()
+
+		const filledSlot: Slot = {
+			description: "Test slot description",
+			content: "Filled content",
+		}
+
+		expect(filledSlot.content).toBe("Filled content")
+	})
+
+	test("FeedItem with empty slots record", () => {
+		const item: FeedItem<"test", { value: number }> = {
+			id: "test-1",
+			type: "test",
+			timestamp: new Date(),
+			data: { value: 1 },
+			slots: {},
+		}
+
+		expect(item.slots).toEqual({})
+		expect(Object.keys(item.slots!)).toHaveLength(0)
+	})
+})

packages/aris-core/src/feed.ts

@@ -1,3 +1,42 @@
+/**
+ * Source-provided hints for post-processors.
+ *
+ * Sources express domain-specific relevance without determining final ranking.
+ * Post-processors consume these signals alongside other inputs (user affinity,
+ * time of day, interaction history) to produce the final feed order.
+ */
+export const TimeRelevance = {
+	/** Needs attention now (e.g., event starting in minutes, severe alert) */
+	Imminent: "imminent",
+	/** Relevant soon (e.g., event in the next hour, approaching deadline) */
+	Upcoming: "upcoming",
+	/** Background information (e.g., daily forecast, low-priority status) */
+	Ambient: "ambient",
+} as const
+
+export type TimeRelevance = (typeof TimeRelevance)[keyof typeof TimeRelevance]
+
+export interface FeedItemSignals {
+	/** Source-assessed urgency (0-1). Post-processors use this as one ranking input. */
+	urgency?: number
+	/** How time-sensitive this item is relative to now. */
+	timeRelevance?: TimeRelevance
+}
+
+/**
+ * A named slot for LLM-fillable content on a feed item.
+ *
+ * Sources declare slots with a description that tells the LLM what content
+ * to generate. The enhancement harness fills `content` asynchronously;
+ * until then it remains `null`.
+ */
+export interface Slot {
+	/** Tells the LLM what this slot wants — written by the source */
+	description: string
+	/** LLM-filled text content, null until enhanced */
+	content: string | null
+}
+
 /**
  * A single item in the feed.
  *
@@ -8,9 +47,15 @@
  * const item: WeatherItem = {
  *   id: "weather-123",
  *   type: "weather",
- *   priority: 0.5,
  *   timestamp: new Date(),
  *   data: { temp: 18, condition: "cloudy" },
+ *   signals: { urgency: 0.5, timeRelevance: "ambient" },
+ *   slots: {
+ *     insight: {
+ *       description: "A short contextual insight about the current weather",
+ *       content: null,
+ *     },
+ *   },
  * }
  * ```
  */
@@ -22,10 +67,12 @@ export interface FeedItem<
 	id: string
 	/** Item type, matches the data source type */
 	type: TType
-	/** Sort priority (higher = more important, shown first) */
-	priority: number
 	/** When this item was generated */
 	timestamp: Date
 	/** Type-specific payload */
 	data: TData
+	/** Source-provided hints for post-processors. Optional — omit if no signals apply. */
+	signals?: FeedItemSignals
+	/** Named slots for LLM-fillable content. Keys are slot names. */
+	slots?: Record<string, Slot>
 }

packages/aris-core/src/index.ts

@@ -1,17 +1,21 @@
 // Context
-export type { Context, ContextKey } from "./context"
-export { contextKey, contextValue } from "./context"
+export type { ContextEntry, ContextKey, ContextKeyPart } from "./context"
+export { Context, contextKey, serializeKey } from "./context"
 
 // Actions
 export type { ActionDefinition } from "./action"
 export { UnknownActionError } from "./action"
 
 // Feed
-export type { FeedItem } from "./feed"
+export type { FeedItem, FeedItemSignals, Slot } from "./feed"
+export { TimeRelevance } from "./feed"
 
 // Feed Source
 export type { FeedSource } from "./feed-source"
 
+// Feed Post-Processor
+export type { FeedEnhancement, FeedPostProcessor, ItemGroup } from "./feed-post-processor"
+
 // Feed Engine
 export type { FeedEngineConfig, FeedResult, FeedSubscriber, SourceError } from "./feed-engine"
 export { FeedEngine } from "./feed-engine"

packages/aris-core/src/reconciler.ts

@@ -72,8 +72,6 @@ export class Reconciler<TItems extends FeedItem = never> {
 			}
 		})
 
-		items.sort((a, b) => b.priority - a.priority)
-
 		return { items, errors } as ReconcileResult<TItems>
 	}
 }

packages/aris-data-source-weatherkit/src/data-source.test.ts

@@ -1,5 +1,6 @@
-import type { Context } from "@aris/core"
+import type { ContextKey } from "@aris/core"
 
+import { Context, contextKey } from "@aris/core"
 import { describe, expect, test } from "bun:test"
 
 import type { WeatherKitClient, WeatherKitResponse } from "./weatherkit"
@@ -15,14 +16,25 @@ const mockCredentials = {
 	serviceId: "mock",
 }
 
+interface LocationData {
+	lat: number
+	lng: number
+	accuracy: number
+}
+
+const LocationKey: ContextKey<LocationData> = contextKey("aris.location", "location")
+
 const createMockClient = (response: WeatherKitResponse): WeatherKitClient => ({
 	fetch: async () => response,
 })
 
-const createMockContext = (location?: { lat: number; lng: number }): Context => ({
-	time: new Date("2026-01-17T00:00:00Z"),
-	location: location ? { ...location, accuracy: 10 } : undefined,
-})
+function createMockContext(location?: { lat: number; lng: number }): Context {
+	const ctx = new Context(new Date("2026-01-17T00:00:00Z"))
+	if (location) {
+		ctx.set([[LocationKey, { ...location, accuracy: 10 }]])
+	}
+	return ctx
+}
 
 describe("WeatherKitDataSource", () => {
 	test("returns empty array when location is missing", async () => {
@@ -39,7 +51,7 @@ describe("WeatherKitDataSource", () => {
 			credentials: mockCredentials,
 		})
 
-		expect(dataSource.type).toBe(WeatherFeedItemType.current)
+		expect(dataSource.type).toBe(WeatherFeedItemType.Current)
 	})
 
 	test("throws error if neither client nor credentials provided", () => {
@@ -130,9 +142,9 @@ describe("query() with mocked client", () => {
 		const items = await dataSource.query(context)
 
 		expect(items.length).toBeGreaterThan(0)
-		expect(items.some((i) => i.type === WeatherFeedItemType.current)).toBe(true)
-		expect(items.some((i) => i.type === WeatherFeedItemType.hourly)).toBe(true)
-		expect(items.some((i) => i.type === WeatherFeedItemType.daily)).toBe(true)
+		expect(items.some((i) => i.type === WeatherFeedItemType.Current)).toBe(true)
+		expect(items.some((i) => i.type === WeatherFeedItemType.Hourly)).toBe(true)
+		expect(items.some((i) => i.type === WeatherFeedItemType.Daily)).toBe(true)
 	})
 
 	test("applies hourly and daily limits", async () => {
@@ -145,8 +157,8 @@ describe("query() with mocked client", () => {
 
 		const items = await dataSource.query(context)
 
-		const hourlyItems = items.filter((i) => i.type === WeatherFeedItemType.hourly)
-		const dailyItems = items.filter((i) => i.type === WeatherFeedItemType.daily)
+		const hourlyItems = items.filter((i) => i.type === WeatherFeedItemType.Hourly)
+		const dailyItems = items.filter((i) => i.type === WeatherFeedItemType.Daily)
 
 		expect(hourlyItems.length).toBe(3)
 		expect(dailyItems.length).toBe(2)
@@ -176,8 +188,8 @@ describe("query() with mocked client", () => {
 			units: Units.imperial,
 		})
 
-		const metricCurrent = metricItems.find((i) => i.type === WeatherFeedItemType.current)
-		const imperialCurrent = imperialItems.find((i) => i.type === WeatherFeedItemType.current)
+		const metricCurrent = metricItems.find((i) => i.type === WeatherFeedItemType.Current)
+		const imperialCurrent = imperialItems.find((i) => i.type === WeatherFeedItemType.Current)
 
 		expect(metricCurrent).toBeDefined()
 		expect(imperialCurrent).toBeDefined()
@@ -190,21 +202,22 @@ describe("query() with mocked client", () => {
 		expect(imperialTemp).toBeCloseTo(expectedImperial, 2)
 	})
 
-	test("assigns priority based on weather conditions", async () => {
+	test("assigns signals based on weather conditions", async () => {
 		const dataSource = new WeatherKitDataSource({ client: mockClient })
 		const context = createMockContext({ lat: 37.7749, lng: -122.4194 })
 
 		const items = await dataSource.query(context)
 
 		for (const item of items) {
-			expect(item.priority).toBeGreaterThanOrEqual(0)
-			expect(item.priority).toBeLessThanOrEqual(1)
+			expect(item.signals).toBeDefined()
+			expect(item.signals!.urgency).toBeGreaterThanOrEqual(0)
+			expect(item.signals!.urgency).toBeLessThanOrEqual(1)
+			expect(item.signals!.timeRelevance).toBeDefined()
 		}
 
-		const currentItem = items.find((i) => i.type === WeatherFeedItemType.current)
+		const currentItem = items.find((i) => i.type === WeatherFeedItemType.Current)
 		expect(currentItem).toBeDefined()
-		// Base priority for current is 0.5, may be adjusted for conditions
-		expect(currentItem!.priority).toBeGreaterThanOrEqual(0.5)
+		expect(currentItem!.signals!.urgency).toBeGreaterThanOrEqual(0.5)
 	})
 
 	test("generates unique IDs for each item", async () => {

packages/aris-data-source-weatherkit/src/data-source.ts

@@ -1,4 +1,6 @@
-import type { Context, DataSource } from "@aris/core"
+import type { Context, ContextKey, DataSource, FeedItemSignals } from "@aris/core"
+
+import { TimeRelevance, contextKey } from "@aris/core"
 
 import {
 	WeatherFeedItemType,
@@ -38,11 +40,18 @@ export interface WeatherKitQueryConfig {
 	units?: Units
 }
 
+interface LocationData {
+	lat: number
+	lng: number
+}
+
+const LocationKey: ContextKey<LocationData> = contextKey("aris.location", "location")
+
 export class WeatherKitDataSource implements DataSource<WeatherFeedItem, WeatherKitQueryConfig> {
 	private readonly DEFAULT_HOURLY_LIMIT = 12
 	private readonly DEFAULT_DAILY_LIMIT = 7
 
-	readonly type = WeatherFeedItemType.current
+	readonly type = WeatherFeedItemType.Current
 	private readonly client: WeatherKitClient
 	private readonly hourlyLimit: number
 	private readonly dailyLimit: number
@@ -57,7 +66,8 @@ export class WeatherKitDataSource implements DataSource<WeatherFeedItem, Weather
 	}
 
 	async query(context: Context, config: WeatherKitQueryConfig = {}): Promise<WeatherFeedItem[]> {
-		if (!context.location) {
+		const location = context.get(LocationKey)
+		if (!location) {
 			return []
 		}
 
@@ -65,8 +75,8 @@ export class WeatherKitDataSource implements DataSource<WeatherFeedItem, Weather
 		const timestamp = context.time
 
 		const response = await this.client.fetch({
-			lat: context.location.lat,
-			lng: context.location.lng,
+			lat: location.lat,
+			lng: location.lng,
 		})
 
 		const items: WeatherFeedItem[] = []
@@ -105,7 +115,7 @@ export class WeatherKitDataSource implements DataSource<WeatherFeedItem, Weather
 	}
 }
 
-const BASE_PRIORITY = {
+const BASE_URGENCY = {
 	current: 0.5,
 	hourly: 0.3,
 	daily: 0.2,
@@ -134,17 +144,17 @@ const MODERATE_CONDITIONS = new Set<ConditionCode>([
 	ConditionCode.BlowingSnow,
 ])
 
-function adjustPriorityForCondition(basePriority: number, conditionCode: ConditionCode): number {
+function adjustUrgencyForCondition(baseUrgency: number, conditionCode: ConditionCode): number {
 	if (SEVERE_CONDITIONS.has(conditionCode)) {
-		return Math.min(1, basePriority + 0.3)
+		return Math.min(1, baseUrgency + 0.3)
 	}
 	if (MODERATE_CONDITIONS.has(conditionCode)) {
-		return Math.min(1, basePriority + 0.15)
+		return Math.min(1, baseUrgency + 0.15)
 	}
-	return basePriority
+	return baseUrgency
 }
 
-function adjustPriorityForAlertSeverity(severity: Severity): number {
+function adjustUrgencyForAlertSeverity(severity: Severity): number {
 	switch (severity) {
 		case Severity.Extreme:
 			return 1
@@ -153,7 +163,29 @@ function adjustPriorityForAlertSeverity(severity: Severity): number {
 		case Severity.Moderate:
 			return 0.75
 		case Severity.Minor:
-			return BASE_PRIORITY.alert
+			return BASE_URGENCY.alert
+	}
+}
+
+function timeRelevanceForCondition(conditionCode: ConditionCode): TimeRelevance {
+	if (SEVERE_CONDITIONS.has(conditionCode)) {
+		return TimeRelevance.Imminent
+	}
+	if (MODERATE_CONDITIONS.has(conditionCode)) {
+		return TimeRelevance.Upcoming
+	}
+	return TimeRelevance.Ambient
+}
+
+function timeRelevanceForAlertSeverity(severity: Severity): TimeRelevance {
+	switch (severity) {
+		case Severity.Extreme:
+		case Severity.Severe:
+			return TimeRelevance.Imminent
+		case Severity.Moderate:
+			return TimeRelevance.Upcoming
+		case Severity.Minor:
+			return TimeRelevance.Ambient
 	}
 }
 
@@ -197,12 +229,14 @@ function createCurrentWeatherFeedItem(
 	timestamp: Date,
 	units: Units,
 ): CurrentWeatherFeedItem {
-	const priority = adjustPriorityForCondition(BASE_PRIORITY.current, current.conditionCode)
+	const signals: FeedItemSignals = {
+		urgency: adjustUrgencyForCondition(BASE_URGENCY.current, current.conditionCode),
+		timeRelevance: timeRelevanceForCondition(current.conditionCode),
+	}
 
 	return {
 		id: `weather-current-${timestamp.getTime()}`,
-		type: WeatherFeedItemType.current,
-		priority,
+		type: WeatherFeedItemType.Current,
 		timestamp,
 		data: {
 			conditionCode: current.conditionCode,
@@ -219,6 +253,7 @@ function createCurrentWeatherFeedItem(
 			windGust: convertSpeed(current.windGust, units),
 			windSpeed: convertSpeed(current.windSpeed, units),
 		},
+		signals,
 	}
 }
 
@@ -228,12 +263,14 @@ function createHourlyWeatherFeedItem(
 	timestamp: Date,
 	units: Units,
 ): HourlyWeatherFeedItem {
-	const priority = adjustPriorityForCondition(BASE_PRIORITY.hourly, hourly.conditionCode)
+	const signals: FeedItemSignals = {
+		urgency: adjustUrgencyForCondition(BASE_URGENCY.hourly, hourly.conditionCode),
+		timeRelevance: timeRelevanceForCondition(hourly.conditionCode),
+	}
 
 	return {
 		id: `weather-hourly-${timestamp.getTime()}-${index}`,
-		type: WeatherFeedItemType.hourly,
-		priority,
+		type: WeatherFeedItemType.Hourly,
 		timestamp,
 		data: {
 			forecastTime: new Date(hourly.forecastStart),
@@ -250,6 +287,7 @@ function createHourlyWeatherFeedItem(
 			windGust: convertSpeed(hourly.windGust, units),
 			windSpeed: convertSpeed(hourly.windSpeed, units),
 		},
+		signals,
 	}
 }
 
@@ -259,12 +297,14 @@ function createDailyWeatherFeedItem(
 	timestamp: Date,
 	units: Units,
 ): DailyWeatherFeedItem {
-	const priority = adjustPriorityForCondition(BASE_PRIORITY.daily, daily.conditionCode)
+	const signals: FeedItemSignals = {
+		urgency: adjustUrgencyForCondition(BASE_URGENCY.daily, daily.conditionCode),
+		timeRelevance: timeRelevanceForCondition(daily.conditionCode),
+	}
 
 	return {
 		id: `weather-daily-${timestamp.getTime()}-${index}`,
-		type: WeatherFeedItemType.daily,
-		priority,
+		type: WeatherFeedItemType.Daily,
 		timestamp,
 		data: {
 			forecastDate: new Date(daily.forecastStart),
@@ -279,16 +319,19 @@ function createDailyWeatherFeedItem(
 			temperatureMax: convertTemperature(daily.temperatureMax, units),
 			temperatureMin: convertTemperature(daily.temperatureMin, units),
 		},
+		signals,
 	}
 }
 
 function createWeatherAlertFeedItem(alert: WeatherAlert, timestamp: Date): WeatherAlertFeedItem {
-	const priority = adjustPriorityForAlertSeverity(alert.severity)
+	const signals: FeedItemSignals = {
+		urgency: adjustUrgencyForAlertSeverity(alert.severity),
+		timeRelevance: timeRelevanceForAlertSeverity(alert.severity),
+	}
 
 	return {
 		id: `weather-alert-${alert.id}`,
-		type: WeatherFeedItemType.alert,
-		priority,
+		type: WeatherFeedItemType.Alert,
 		timestamp,
 		data: {
 			alertId: alert.id,
@@ -302,5 +345,6 @@ function createWeatherAlertFeedItem(alert: WeatherAlert, timestamp: Date): Weath
 			source: alert.source,
 			urgency: alert.urgency,
 		},
+		signals,
 	}
 }

packages/aris-data-source-weatherkit/src/feed-items.ts

@@ -3,10 +3,10 @@ import type { FeedItem } from "@aris/core"
 import type { Certainty, ConditionCode, PrecipitationType, Severity, Urgency } from "./weatherkit"
 
 export const WeatherFeedItemType = {
-	current: "weather-current",
-	hourly: "weather-hourly",
-	daily: "weather-daily",
-	alert: "weather-alert",
+	Current: "weather-current",
+	Hourly: "weather-hourly",
+	Daily: "weather-daily",
+	Alert: "weather-alert",
 } as const
 
 export type WeatherFeedItemType = (typeof WeatherFeedItemType)[keyof typeof WeatherFeedItemType]
@@ -28,7 +28,7 @@ export type CurrentWeatherData = {
 }
 
 export interface CurrentWeatherFeedItem extends FeedItem<
-	typeof WeatherFeedItemType.current,
+	typeof WeatherFeedItemType.Current,
 	CurrentWeatherData
 > {}
 
@@ -49,7 +49,7 @@ export type HourlyWeatherData = {
 }
 
 export interface HourlyWeatherFeedItem extends FeedItem<
-	typeof WeatherFeedItemType.hourly,
+	typeof WeatherFeedItemType.Hourly,
 	HourlyWeatherData
 > {}
 
@@ -68,7 +68,7 @@ export type DailyWeatherData = {
 }
 
 export interface DailyWeatherFeedItem extends FeedItem<
-	typeof WeatherFeedItemType.daily,
+	typeof WeatherFeedItemType.Daily,
 	DailyWeatherData
 > {}
 
@@ -86,7 +86,7 @@ export type WeatherAlertData = {
 }
 
 export interface WeatherAlertFeedItem extends FeedItem<
-	typeof WeatherFeedItemType.alert,
+	typeof WeatherFeedItemType.Alert,
 	WeatherAlertData
 > {}
 

packages/aris-feed-enhancers/package.json

@@ -0,0 +1,17 @@
+{
+	"name": "@aris/feed-enhancers",
+	"version": "0.0.0",
+	"type": "module",
+	"main": "src/index.ts",
+	"types": "src/index.ts",
+	"scripts": {
+		"test": "bun test src/"
+	},
+	"dependencies": {
+		"@aris/core": "workspace:*",
+		"@aris/source-caldav": "workspace:*",
+		"@aris/source-google-calendar": "workspace:*",
+		"@aris/source-tfl": "workspace:*",
+		"@aris/source-weatherkit": "workspace:*"
+	}
+}

packages/aris-feed-enhancers/src/index.ts

@@ -0,0 +1 @@
+export { createTimeOfDayEnhancer, type TimeOfDayEnhancerOptions } from "./time-of-day-enhancer.ts"

packages/aris-feed-enhancers/src/time-of-day-enhancer.test.ts

@@ -0,0 +1,704 @@
+import type { FeedItem, FeedItemSignals } from "@aris/core"
+
+import { Context, TimeRelevance } from "@aris/core"
+import { CalDavFeedItemType } from "@aris/source-caldav"
+import { CalendarFeedItemType } from "@aris/source-google-calendar"
+import { TflFeedItemType } from "@aris/source-tfl"
+import { WeatherFeedItemType } from "@aris/source-weatherkit"
+import { describe, expect, test } from "bun:test"
+
+import {
+	createTimeOfDayEnhancer,
+	getTimePeriod,
+	getDayType,
+	TimePeriod,
+	DayType,
+} from "./time-of-day-enhancer"
+
+// =============================================================================
+// Helpers
+// =============================================================================
+
+function makeContext(date: Date): Context {
+	return new Context(date)
+}
+
+function makeDate(year: number, month: number, day: number, hour: number, minute = 0): Date {
+	return new Date(year, month - 1, day, hour, minute, 0, 0)
+}
+
+/** Tuesday 2025-07-08 at given hour:minute */
+function tuesday(hour: number, minute = 0): Date {
+	return makeDate(2025, 7, 8, hour, minute)
+}
+
+/** Saturday 2025-07-12 at given hour:minute */
+function saturday(hour: number, minute = 0): Date {
+	return makeDate(2025, 7, 12, hour, minute)
+}
+
+function weatherCurrent(id = "w-current"): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Current,
+		timestamp: new Date(),
+		data: { temperature: 18, precipitationIntensity: 0 },
+	}
+}
+
+function weatherCurrentRainy(id = "w-current-rain"): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Current,
+		timestamp: new Date(),
+		data: { temperature: 12, precipitationIntensity: 2.5 },
+	}
+}
+
+function weatherCurrentExtreme(id = "w-current-extreme"): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Current,
+		timestamp: new Date(),
+		data: { temperature: -5, precipitationIntensity: 0 },
+	}
+}
+
+function weatherHourly(id = "w-hourly"): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Hourly,
+		timestamp: new Date(),
+		data: { forecastTime: new Date(), temperature: 20 },
+	}
+}
+
+function weatherDaily(id = "w-daily"): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Daily,
+		timestamp: new Date(),
+		data: { forecastDate: new Date() },
+	}
+}
+
+function weatherAlert(id = "w-alert", urgency = 0.9): FeedItem {
+	return {
+		id,
+		type: WeatherFeedItemType.Alert,
+		timestamp: new Date(),
+		data: { severity: "extreme" },
+		signals: { urgency, timeRelevance: TimeRelevance.Imminent },
+	}
+}
+
+function calendarEvent(
+	id: string,
+	startTime: Date,
+	options: { location?: string; signals?: FeedItemSignals } = {},
+): FeedItem {
+	return {
+		id,
+		type: CalendarFeedItemType.Event,
+		timestamp: new Date(),
+		data: {
+			eventId: id,
+			calendarId: "primary",
+			title: `Event ${id}`,
+			description: null,
+			location: options.location ?? null,
+			startTime,
+			endTime: new Date(startTime.getTime() + 3_600_000),
+			isAllDay: false,
+			status: "confirmed",
+			htmlLink: "",
+		},
+		signals: options.signals,
+	}
+}
+
+function calendarAllDay(id: string): FeedItem {
+	return {
+		id,
+		type: CalendarFeedItemType.AllDay,
+		timestamp: new Date(),
+		data: {
+			eventId: id,
+			calendarId: "primary",
+			title: `All Day ${id}`,
+			description: null,
+			location: null,
+			startTime: new Date(),
+			endTime: new Date(),
+			isAllDay: true,
+			status: "confirmed",
+			htmlLink: "",
+		},
+		signals: { timeRelevance: TimeRelevance.Ambient },
+	}
+}
+
+function caldavEvent(
+	id: string,
+	startDate: Date,
+	options: { location?: string; signals?: FeedItemSignals } = {},
+): FeedItem {
+	return {
+		id,
+		type: CalDavFeedItemType.Event,
+		timestamp: new Date(),
+		data: {
+			uid: id,
+			title: `CalDAV ${id}`,
+			startDate,
+			endDate: new Date(startDate.getTime() + 3_600_000),
+			isAllDay: false,
+			location: options.location ?? null,
+			description: null,
+			calendarName: null,
+			status: "confirmed",
+			url: null,
+			organizer: null,
+			attendees: [],
+			alarms: [],
+			recurrenceId: null,
+		},
+		signals: options.signals,
+	}
+}
+
+function tflAlert(id = "tfl-1", urgency = 0.8): FeedItem {
+	return {
+		id,
+		type: TflFeedItemType.Alert,
+		timestamp: new Date(),
+		data: {
+			line: "northern",
+			lineName: "Northern",
+			severity: "major-delays",
+			description: "Delays",
+		},
+		signals: { urgency, timeRelevance: TimeRelevance.Imminent },
+	}
+}
+
+function unknownItem(id = "unknown-1"): FeedItem {
+	return {
+		id,
+		type: "some-future-type",
+		timestamp: new Date(),
+		data: { foo: "bar" },
+	}
+}
+
+// =============================================================================
+// Period detection
+// =============================================================================
+
+describe("getTimePeriod", () => {
+	test("morning: 06:00–11:59", () => {
+		expect(getTimePeriod(tuesday(6))).toBe(TimePeriod.Morning)
+		expect(getTimePeriod(tuesday(8))).toBe(TimePeriod.Morning)
+		expect(getTimePeriod(tuesday(11, 59))).toBe(TimePeriod.Morning)
+	})
+
+	test("afternoon: 12:00–16:59", () => {
+		expect(getTimePeriod(tuesday(12))).toBe(TimePeriod.Afternoon)
+		expect(getTimePeriod(tuesday(14))).toBe(TimePeriod.Afternoon)
+		expect(getTimePeriod(tuesday(16, 59))).toBe(TimePeriod.Afternoon)
+	})
+
+	test("evening: 17:00–21:59", () => {
+		expect(getTimePeriod(tuesday(17))).toBe(TimePeriod.Evening)
+		expect(getTimePeriod(tuesday(19))).toBe(TimePeriod.Evening)
+		expect(getTimePeriod(tuesday(21, 59))).toBe(TimePeriod.Evening)
+	})
+
+	test("night: 22:00–05:59", () => {
+		expect(getTimePeriod(tuesday(22))).toBe(TimePeriod.Night)
+		expect(getTimePeriod(tuesday(0))).toBe(TimePeriod.Night)
+		expect(getTimePeriod(tuesday(3))).toBe(TimePeriod.Night)
+		expect(getTimePeriod(tuesday(5, 59))).toBe(TimePeriod.Night)
+	})
+})
+
+describe("getDayType", () => {
+	test("weekday: Monday–Friday", () => {
+		// 2025-07-07 is Monday, 2025-07-08 is Tuesday, 2025-07-11 is Friday
+		expect(getDayType(makeDate(2025, 7, 7, 10))).toBe(DayType.Weekday)
+		expect(getDayType(tuesday(10))).toBe(DayType.Weekday)
+		expect(getDayType(makeDate(2025, 7, 11, 10))).toBe(DayType.Weekday)
+	})
+
+	test("weekend: Saturday–Sunday", () => {
+		expect(getDayType(saturday(10))).toBe(DayType.Weekend)
+		expect(getDayType(makeDate(2025, 7, 13, 10))).toBe(DayType.Weekend) // Sunday
+	})
+})
+
+// =============================================================================
+// Morning
+// =============================================================================
+
+describe("morning weekday", () => {
+	const now = tuesday(8)
+	const ctx = makeContext(now)
+
+	test("boosts weather-current and weather-alert, demotes weather-hourly", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherCurrent(), weatherHourly(), weatherAlert()]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+		expect(result.boost!["w-alert"]).toBeGreaterThan(0)
+		expect(result.boost!["w-hourly"]).toBeLessThan(0)
+	})
+
+	test("boosts first calendar event of the day", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event1 = calendarEvent("c1", tuesday(9))
+		const event2 = calendarEvent("c2", tuesday(14))
+		const result = await enhancer([event1, event2], ctx)
+
+		expect(result.boost!["c1"]).toBeGreaterThan(0)
+		// Second event should not get the first-event boost
+		expect(result.boost?.["c2"] ?? 0).toBeLessThanOrEqual(0)
+	})
+
+	test("boosts TfL alerts", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const result = await enhancer([tflAlert()], ctx)
+
+		expect(result.boost!["tfl-1"]).toBeGreaterThan(0)
+	})
+})
+
+describe("morning weekend", () => {
+	const now = saturday(9)
+	const ctx = makeContext(now)
+
+	test("boosts weather-current and weather-daily", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherCurrent(), weatherDaily()]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+		expect(result.boost!["w-daily"]).toBeGreaterThan(0)
+	})
+
+	test("demotes calendar events and TfL alerts", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", saturday(10))
+		const items = [event, tflAlert()]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["c1"]).toBeLessThan(0)
+		expect(result.boost!["tfl-1"]).toBeLessThan(0)
+	})
+})
+
+// =============================================================================
+// Afternoon
+// =============================================================================
+
+describe("afternoon weekday", () => {
+	const now = tuesday(14)
+	const ctx = makeContext(now)
+
+	test("boosts imminent calendar events", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", tuesday(14, 10), {
+			signals: { timeRelevance: TimeRelevance.Imminent },
+		})
+		const result = await enhancer([event], ctx)
+
+		expect(result.boost!["c1"]).toBeGreaterThan(0)
+	})
+
+	test("demotes weather-current and weather-hourly", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherCurrent(), weatherHourly()]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-current"]).toBeLessThan(0)
+		expect(result.boost!["w-hourly"]).toBeLessThan(0)
+	})
+})
+
+describe("afternoon weekend", () => {
+	const now = saturday(14)
+	const ctx = makeContext(now)
+
+	test("boosts weather-current, demotes calendar events", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", saturday(15))
+		const items = [weatherCurrent(), event]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+		expect(result.boost!["c1"]).toBeLessThan(0)
+	})
+})
+
+// =============================================================================
+// Evening
+// =============================================================================
+
+describe("evening weekday", () => {
+	const now = tuesday(19)
+	const ctx = makeContext(now)
+
+	test("suppresses ambient work calendar events", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", tuesday(9), {
+			signals: { timeRelevance: TimeRelevance.Ambient },
+		})
+		const result = await enhancer([event], ctx)
+
+		expect(result.suppress).toContain("c1")
+	})
+
+	test("demotes TfL alerts", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const result = await enhancer([tflAlert()], ctx)
+
+		expect(result.boost!["tfl-1"]).toBeLessThan(0)
+	})
+
+	test("boosts weather-daily and all-day calendar events", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherDaily(), calendarAllDay("ad1")]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-daily"]).toBeGreaterThan(0)
+		expect(result.boost!["ad1"]).toBeGreaterThan(0)
+	})
+})
+
+describe("evening weekend", () => {
+	const now = saturday(19)
+	const ctx = makeContext(now)
+
+	test("boosts weather-current, suppresses ambient calendar events", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", saturday(9), {
+			signals: { timeRelevance: TimeRelevance.Ambient },
+		})
+		const items = [weatherCurrent(), event]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+		expect(result.suppress).toContain("c1")
+	})
+
+	test("demotes TfL alerts more aggressively", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const result = await enhancer([tflAlert()], ctx)
+
+		expect(result.boost!["tfl-1"]).toBeLessThan(-0.3)
+	})
+})
+
+// =============================================================================
+// Night
+// =============================================================================
+
+describe("night", () => {
+	const now = tuesday(23)
+	const ctx = makeContext(now)
+
+	test("suppresses ambient items", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", tuesday(9), {
+			signals: { timeRelevance: TimeRelevance.Ambient },
+		})
+		const result = await enhancer([event], ctx)
+
+		expect(result.suppress).toContain("c1")
+	})
+
+	test("demotes calendar events and weather-current", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", makeDate(2025, 7, 9, 9)) // tomorrow
+		const items = [event, weatherCurrent()]
+		const result = await enhancer(items, ctx)
+
+		expect(result.boost!["c1"]).toBeLessThan(0)
+		expect(result.boost!["w-current"]).toBeLessThan(0)
+	})
+
+	test("high-urgency alerts survive unboosted", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const alert = weatherAlert("w-alert", 0.9)
+		const result = await enhancer([alert], ctx)
+
+		// Should not be demoted — either no boost entry or >= 0
+		const alertBoost = result.boost?.["w-alert"] ?? 0
+		expect(alertBoost).toBeGreaterThanOrEqual(0)
+	})
+})
+
+// =============================================================================
+// Pre-meeting window
+// =============================================================================
+
+describe("pre-meeting window", () => {
+	test("boosts upcoming meeting to +0.9", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10))
+		const result = await enhancer([meeting], makeContext(now))
+
+		expect(result.boost!["c1"]).toBe(0.9)
+	})
+
+	test("suppresses low-urgency items during pre-meeting", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10))
+		const lowPriority = weatherHourly()
+		lowPriority.signals = { urgency: 0.1 }
+		const result = await enhancer([meeting, lowPriority], makeContext(now))
+
+		expect(result.suppress).toContain("w-hourly")
+	})
+
+	test("does not suppress items without signals during pre-meeting", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10))
+		const noSignals = weatherDaily()
+		const result = await enhancer([meeting, noSignals], makeContext(now))
+
+		expect(result.suppress ?? []).not.toContain("w-daily")
+	})
+
+	test("boosts TfL alerts during pre-meeting", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10))
+		const result = await enhancer([meeting, tflAlert()], makeContext(now))
+
+		expect(result.boost!["tfl-1"]).toBeGreaterThan(0)
+	})
+
+	test("boosts weather-current if meeting has a location", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10), { location: "Office, London" })
+		const result = await enhancer([meeting, weatherCurrent()], makeContext(now))
+
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+	})
+
+	test("works with CalDAV events", async () => {
+		const now = tuesday(9, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = caldavEvent("cd1", tuesday(10))
+		const result = await enhancer([meeting], makeContext(now))
+
+		expect(result.boost!["cd1"]).toBe(0.9)
+	})
+
+	test("does not trigger for events more than 30 minutes away", async () => {
+		const now = tuesday(9)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(10))
+		const result = await enhancer([meeting], makeContext(now))
+
+		// Should not get the +0.9 pre-meeting boost
+		expect(result.boost?.["c1"] ?? 0).not.toBe(0.9)
+	})
+})
+
+// =============================================================================
+// Wind-down gradient
+// =============================================================================
+
+describe("wind-down gradient", () => {
+	test("20:00 weekday: additional -0.1 on work items", async () => {
+		const now = tuesday(20)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		// Non-ambient calendar event — evening rules don't boost or suppress it,
+		// so the only demotion comes from wind-down at 20:00 (-0.1).
+		const event = calendarEvent("c1", makeDate(2025, 7, 9, 9))
+		const result = await enhancer([event], makeContext(now))
+
+		expect(result.boost!["c1"]).toBe(-0.1)
+	})
+
+	test("21:00 weekday: additional -0.2 on work items", async () => {
+		const now = tuesday(21)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const alert = tflAlert("tfl-1", 0.5)
+		const result = await enhancer([alert], makeContext(now))
+
+		// Evening demotes TfL by -0.4, wind-down adds -0.2 = -0.6
+		expect(result.boost!["tfl-1"]).toBeLessThanOrEqual(-0.6)
+	})
+
+	test("21:30 weekday: additional -0.3 on work items", async () => {
+		const now = tuesday(21, 30)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const alert = tflAlert("tfl-1", 0.5)
+		const result = await enhancer([alert], makeContext(now))
+
+		// Evening demotes TfL by -0.4, wind-down adds -0.3 = -0.7
+		expect(result.boost!["tfl-1"]).toBeLessThanOrEqual(-0.7)
+	})
+
+	test("does not apply on weekends", async () => {
+		const now = saturday(21)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const alert = tflAlert("tfl-1", 0.5)
+		const result = await enhancer([alert], makeContext(now))
+
+		// Weekend evening demotes TfL by -0.5, but no wind-down
+		expect(result.boost!["tfl-1"]).toBe(-0.5)
+	})
+})
+
+// =============================================================================
+// Transition lookahead
+// =============================================================================
+
+describe("transition lookahead", () => {
+	test("Saturday 11:40 boosts afternoon-relevant weather-current", async () => {
+		const now = saturday(11, 40)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherCurrent()]
+		const result = await enhancer(items, makeContext(now))
+
+		// Weekend morning boosts weather-current by +0.5.
+		// Transition to afternoon adds +0.2 (weekend afternoon boosts weather-current).
+		expect(result.boost!["w-current"]).toBe(0.7)
+	})
+
+	test("16:40 weekday boosts evening-relevant items (weather-daily)", async () => {
+		const now = tuesday(16, 40)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherDaily()]
+		const result = await enhancer(items, makeContext(now))
+
+		// Afternoon weekday doesn't boost weather-daily, but transition to evening does (+0.2)
+		expect(result.boost!["w-daily"]).toBeGreaterThan(0)
+	})
+
+	test("does not apply when far from boundary", async () => {
+		const now = tuesday(14)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const items = [weatherDaily()]
+		const result = await enhancer(items, makeContext(now))
+
+		// Afternoon weekday doesn't boost or demote weather-daily, and no transition
+		expect(result.boost?.["w-daily"]).toBeUndefined()
+	})
+})
+
+// =============================================================================
+// Weather-time correlation
+// =============================================================================
+
+describe("weather-time correlation", () => {
+	test("morning weekday: extra boost for precipitation", async () => {
+		const now = tuesday(8)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const rainy = weatherCurrentRainy()
+		const dry = weatherCurrent("w-dry")
+		const result = await enhancer([rainy, dry], makeContext(now))
+
+		// Both get morning boost, but rainy gets extra +0.1
+		expect(result.boost!["w-current-rain"]).toBeGreaterThan(result.boost!["w-dry"] ?? 0)
+	})
+
+	test("morning weekday: extra boost for extreme temperature", async () => {
+		const now = tuesday(8)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const extreme = weatherCurrentExtreme()
+		const normal = weatherCurrent("w-normal")
+		const result = await enhancer([extreme, normal], makeContext(now))
+
+		expect(result.boost!["w-current-extreme"]).toBeGreaterThan(result.boost!["w-normal"] ?? 0)
+	})
+
+	test("evening with location event: extra boost for weather-current", async () => {
+		const now = tuesday(19)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const event = calendarEvent("c1", tuesday(19, 30), { location: "The Ivy, London" })
+		const items = [weatherCurrent(), event]
+		const result = await enhancer(items, makeContext(now))
+
+		// Weather-current gets evening weather-time correlation boost (+0.2)
+		// Note: evening weekday doesn't normally boost weather-current
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+	})
+
+	test("weather-alert always gets at least +0.5", async () => {
+		const now = tuesday(14) // afternoon — no special weather boost
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const alert = weatherAlert("w-alert", 0.5)
+		const result = await enhancer([alert], makeContext(now))
+
+		expect(result.boost!["w-alert"]).toBeGreaterThanOrEqual(0.5)
+	})
+})
+
+// =============================================================================
+// Edge cases
+// =============================================================================
+
+describe("edge cases", () => {
+	test("empty items returns empty enhancement", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => tuesday(8) })
+		const result = await enhancer([], makeContext(tuesday(8)))
+
+		expect(result).toEqual({})
+	})
+
+	test("unknown item types get no boost", async () => {
+		const enhancer = createTimeOfDayEnhancer({ clock: () => tuesday(8) })
+		const result = await enhancer([unknownItem()], makeContext(tuesday(8)))
+
+		expect(result.boost?.["unknown-1"]).toBeUndefined()
+		expect(result.suppress).toBeUndefined()
+	})
+
+	test("uses context.time when no clock provided", async () => {
+		const enhancer = createTimeOfDayEnhancer()
+		const morningCtx = makeContext(tuesday(8))
+		const items = [weatherCurrent()]
+		const result = await enhancer(items, morningCtx)
+
+		// Should apply morning rules — weather-current boosted
+		expect(result.boost!["w-current"]).toBeGreaterThan(0)
+	})
+
+	test("boost values are clamped to [-1, 1]", async () => {
+		// Morning weekday: TfL alert gets +0.6 from period rules.
+		// Pre-meeting adds +0.5. Total would be +1.1 without clamping.
+		const now = tuesday(8, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(9))
+		const alert = tflAlert("tfl-1", 0.8)
+		const result = await enhancer([meeting, alert], makeContext(now))
+
+		expect(result.boost!["tfl-1"]).toBeLessThanOrEqual(1)
+		expect(result.boost!["tfl-1"]).toBeGreaterThanOrEqual(-1)
+	})
+
+	test("suppress list is deduplicated", async () => {
+		// An item that would be suppressed by both evening rules and pre-meeting low-urgency
+		const now = tuesday(19, 45)
+		const enhancer = createTimeOfDayEnhancer({ clock: () => now })
+		const meeting = calendarEvent("c1", tuesday(20))
+		const ambientEvent = calendarEvent("c2", tuesday(9), {
+			signals: { urgency: 0.1, timeRelevance: TimeRelevance.Ambient },
+		})
+		const result = await enhancer([meeting, ambientEvent], makeContext(now))
+
+		if (result.suppress) {
+			const c2Count = result.suppress.filter((id) => id === "c2").length
+			expect(c2Count).toBeLessThanOrEqual(1)
+		}
+	})
+})

packages/aris-feed-enhancers/src/time-of-day-enhancer.ts

@@ -0,0 +1,595 @@
+import type { Context, FeedEnhancement, FeedItem, FeedPostProcessor } from "@aris/core"
+
+import { TimeRelevance } from "@aris/core"
+
+import type { CalDavEventData } from "@aris/source-caldav"
+import type { CalendarEventData } from "@aris/source-google-calendar"
+import type { CurrentWeatherData } from "@aris/source-weatherkit"
+
+import { CalDavFeedItemType } from "@aris/source-caldav"
+import { CalendarFeedItemType } from "@aris/source-google-calendar"
+import { TflFeedItemType } from "@aris/source-tfl"
+import { WeatherFeedItemType } from "@aris/source-weatherkit"
+
+
+export const TimePeriod = {
+	Morning: "morning",
+	Afternoon: "afternoon",
+	Evening: "evening",
+	Night: "night",
+} as const
+
+export type TimePeriod = (typeof TimePeriod)[keyof typeof TimePeriod]
+
+export const DayType = {
+	Weekday: "weekday",
+	Weekend: "weekend",
+} as const
+
+export type DayType = (typeof DayType)[keyof typeof DayType]
+
+
+const PRE_MEETING_WINDOW_MS = 30 * 60 * 1000
+const TRANSITION_WINDOW_MS = 30 * 60 * 1000
+
+const PERIOD_BOUNDARIES = [
+	{ hour: 6, period: TimePeriod.Morning },
+	{ hour: 12, period: TimePeriod.Afternoon },
+	{ hour: 17, period: TimePeriod.Evening },
+	{ hour: 22, period: TimePeriod.Night },
+] as const
+
+/** All calendar event types across sources */
+const CALENDAR_EVENT_TYPES: ReadonlySet<string> = new Set([
+	CalendarFeedItemType.Event,
+	CalDavFeedItemType.Event,
+])
+
+/**
+ * Creates a post-processor that reranks feed items based on time of day.
+ *
+ * Prioritizes items that matter right now and pushes down items that don't:
+ *
+ * - Morning: weather and first meeting rise, hourly forecasts sink.
+ *   Weekends flip — weather stays up but work calendar and commute alerts drop.
+ * - Afternoon: imminent meetings rise. Stale weather sinks.
+ * - Evening: work calendar is suppressed, tomorrow's forecast and personal
+ *   events rise. Weekends suppress work more aggressively.
+ * - Night: almost everything sinks except high-urgency alerts.
+ * - Pre-meeting (30 min before any event): that meeting dominates, low-urgency
+ *   noise is suppressed, commute/weather context rises if the meeting has a location.
+ * - Wind-down (weekday 20–22h): work items progressively sink as night approaches.
+ * - Transition lookahead (30 min before a period boundary): items relevant to
+ *   the next period get a head start.
+ * - Weather-time correlation: precipitation boosts morning weather, evening
+ *   events with locations boost current weather, alerts always stay high.
+ */
+export interface TimeOfDayEnhancerOptions {
+	/** Override clock for testing. Defaults to reading context.time. */
+	clock?: () => Date
+}
+
+export function createTimeOfDayEnhancer(options?: TimeOfDayEnhancerOptions): FeedPostProcessor {
+	const clock = options?.clock
+
+	function timeOfDayEnhancer(items: FeedItem[], context: Context): Promise<FeedEnhancement> {
+		if (items.length === 0) return Promise.resolve({})
+
+		const now = clock ? clock() : context.time
+		const period = getTimePeriod(now)
+		const dayType = getDayType(now)
+		const boost: Record<string, number> = {}
+		const suppress: string[] = []
+
+		// 1. Apply period-based rules
+		const firstEventId = findFirstEventOfDay(items, now)
+
+		switch (period) {
+			case TimePeriod.Morning:
+				if (dayType === DayType.Weekday) {
+					applyMorningWeekday(items, boost, firstEventId)
+				} else {
+					applyMorningWeekend(items, boost)
+				}
+				break
+			case TimePeriod.Afternoon:
+				if (dayType === DayType.Weekday) {
+					applyAfternoonWeekday(items, boost)
+				} else {
+					applyAfternoonWeekend(items, boost)
+				}
+				break
+			case TimePeriod.Evening:
+				if (dayType === DayType.Weekday) {
+					applyEveningWeekday(items, boost, suppress)
+				} else {
+					applyEveningWeekend(items, boost, suppress)
+				}
+				break
+			case TimePeriod.Night:
+				applyNight(items, boost, suppress)
+				break
+		}
+
+		// 2. Pre-meeting overrides (can override period rules)
+		const preMeeting = detectPreMeetingItems(items, now)
+		applyPreMeetingOverrides(items, preMeeting, boost, suppress)
+
+		// 3. Wind-down gradient
+		applyWindDown(items, now, dayType, boost)
+
+		// 4. Transition lookahead
+		applyTransitionLookahead(items, now, period, dayType, boost)
+
+		// 5. Weather-time correlation
+		const eveningLocation = hasEveningCalendarEventWithLocation(items, now)
+		applyWeatherTimeCorrelation(items, period, dayType, eveningLocation, boost)
+
+		// Clamp boost values to [-1, 1] — additive layers can exceed the range
+		for (const id in boost) {
+			boost[id] = Math.max(-1, Math.min(1, boost[id]!))
+		}
+
+		const result: FeedEnhancement = {}
+		if (Object.keys(boost).length > 0) {
+			result.boost = boost
+		}
+		const uniqueSuppress = [...new Set(suppress)]
+		if (uniqueSuppress.length > 0) {
+			result.suppress = uniqueSuppress
+		}
+		return Promise.resolve(result)
+	}
+
+	return timeOfDayEnhancer
+}
+
+
+export function getTimePeriod(date: Date): TimePeriod {
+	const hour = date.getHours()
+	if (hour >= 22 || hour < 6) return TimePeriod.Night
+	if (hour >= 17) return TimePeriod.Evening
+	if (hour >= 12) return TimePeriod.Afternoon
+	return TimePeriod.Morning
+}
+
+export function getDayType(date: Date): DayType {
+	const day = date.getDay()
+	return day === 0 || day === 6 ? DayType.Weekend : DayType.Weekday
+}
+
+/**
+ * Returns the next period boundary as { hour, period } and the ms until it.
+ */
+function getNextPeriodBoundary(date: Date): { period: TimePeriod; msUntil: number } {
+	const hour = date.getHours()
+	const minuteMs = date.getMinutes() * 60_000 + date.getSeconds() * 1000 + date.getMilliseconds()
+
+	for (const boundary of PERIOD_BOUNDARIES) {
+		if (hour < boundary.hour) {
+			const msUntil = (boundary.hour - hour) * 3_600_000 - minuteMs
+			return { period: boundary.period, msUntil }
+		}
+	}
+
+	// Past 22:00 — next boundary is morning at 06:00
+	const hoursUntil6 = (24 - hour + 6) * 3_600_000 - minuteMs
+	return { period: TimePeriod.Morning, msUntil: hoursUntil6 }
+}
+
+/**
+ * Extract start time from calendar event data.
+ * Google Calendar uses `startTime`, CalDAV uses `startDate`.
+ */
+function getEventStartTime(data: CalendarEventData | CalDavEventData): Date {
+	return "startTime" in data ? (data as CalendarEventData).startTime : (data as CalDavEventData).startDate
+}
+
+/**
+ * Check if a current weather item indicates precipitation or extreme conditions.
+ * Only meaningful for weather-current items.
+ */
+function hasPrecipitationOrExtreme(item: FeedItem): boolean {
+	const data = item.data as CurrentWeatherData
+	if (data.precipitationIntensity > 0) return true
+	if (data.temperature < 0 || data.temperature > 35) return true
+	return false
+}
+
+
+interface PreMeetingInfo {
+	/** IDs of calendar items starting within the pre-meeting window */
+	upcomingMeetingIds: Set<string>
+	/** Whether any upcoming meeting has a location */
+	hasLocationMeeting: boolean
+}
+
+function detectPreMeetingItems(items: FeedItem[], now: Date): PreMeetingInfo {
+	const nowMs = now.getTime()
+	const upcomingMeetingIds = new Set<string>()
+	let hasLocationMeeting = false
+
+	for (const item of items) {
+		if (!CALENDAR_EVENT_TYPES.has(item.type)) continue
+
+		const data = item.data as CalendarEventData | CalDavEventData
+		const msUntil = getEventStartTime(data).getTime() - nowMs
+		if (msUntil > 0 && msUntil <= PRE_MEETING_WINDOW_MS) {
+			upcomingMeetingIds.add(item.id)
+			if (data.location) {
+				hasLocationMeeting = true
+			}
+		}
+	}
+
+	return { upcomingMeetingIds, hasLocationMeeting }
+}
+
+
+function findFirstEventOfDay(items: FeedItem[], now: Date): string | null {
+	let earliest: { id: string; time: number } | null = null
+
+	for (const item of items) {
+		if (!CALENDAR_EVENT_TYPES.has(item.type)) continue
+
+		const data = item.data as CalendarEventData | CalDavEventData
+		const startTime = getEventStartTime(data)
+		const startMs = startTime.getTime()
+
+		// Must be today and in the future
+		const sameDay =
+			startTime.getFullYear() === now.getFullYear() &&
+			startTime.getMonth() === now.getMonth() &&
+			startTime.getDate() === now.getDate()
+		if (!sameDay) continue
+		if (startMs <= now.getTime()) continue
+
+		if (!earliest || startMs < earliest.time) {
+			earliest = { id: item.id, time: startMs }
+		}
+	}
+
+	return earliest?.id ?? null
+}
+
+
+function applyMorningWeekday(
+	items: FeedItem[],
+	boost: Record<string, number>,
+	firstEventId: string | null,
+): void {
+	for (const item of items) {
+		switch (item.type) {
+			case WeatherFeedItemType.Current:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.7
+				break
+			case WeatherFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.8
+				break
+			case WeatherFeedItemType.Hourly:
+			case WeatherFeedItemType.Daily:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.3
+				break
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.6
+				break
+		}
+	}
+
+	if (firstEventId) {
+		boost[firstEventId] = (boost[firstEventId] ?? 0) + 0.6
+	}
+}
+
+function applyMorningWeekend(items: FeedItem[], boost: Record<string, number>): void {
+	for (const item of items) {
+		switch (item.type) {
+			case WeatherFeedItemType.Current:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.5
+				break
+			case WeatherFeedItemType.Daily:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.4
+				break
+			case CalendarFeedItemType.Event:
+			case CalDavFeedItemType.Event:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.4
+				break
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.3
+				break
+		}
+	}
+}
+
+function applyAfternoonWeekday(items: FeedItem[], boost: Record<string, number>): void {
+	for (const item of items) {
+		switch (item.type) {
+			case CalendarFeedItemType.Event:
+			case CalDavFeedItemType.Event:
+				if (item.signals?.timeRelevance === TimeRelevance.Imminent) {
+					boost[item.id] = (boost[item.id] ?? 0) + 0.5
+				}
+				break
+			case WeatherFeedItemType.Current:
+			case WeatherFeedItemType.Hourly:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.2
+				break
+		}
+	}
+}
+
+function applyAfternoonWeekend(items: FeedItem[], boost: Record<string, number>): void {
+	for (const item of items) {
+		switch (item.type) {
+			case WeatherFeedItemType.Current:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.3
+				break
+			case CalendarFeedItemType.Event:
+			case CalDavFeedItemType.Event:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.5
+				break
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.2
+				break
+		}
+	}
+}
+
+function applyEveningWeekday(
+	items: FeedItem[],
+	boost: Record<string, number>,
+	suppress: string[],
+): void {
+	for (const item of items) {
+		switch (item.type) {
+			case CalendarFeedItemType.Event:
+			case CalDavFeedItemType.Event:
+				if (item.signals?.timeRelevance === TimeRelevance.Ambient) {
+					suppress.push(item.id)
+				}
+				break
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.4
+				break
+			case WeatherFeedItemType.Daily:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.3
+				break
+			case CalendarFeedItemType.AllDay:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.3
+				break
+		}
+	}
+}
+
+function applyEveningWeekend(
+	items: FeedItem[],
+	boost: Record<string, number>,
+	suppress: string[],
+): void {
+	for (const item of items) {
+		switch (item.type) {
+			case WeatherFeedItemType.Current:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.3
+				break
+			case CalendarFeedItemType.Event:
+			case CalDavFeedItemType.Event:
+				if (item.signals?.timeRelevance === TimeRelevance.Ambient) {
+					suppress.push(item.id)
+				}
+				break
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.5
+				break
+		}
+	}
+}
+
+function applyNight(items: FeedItem[], boost: Record<string, number>, suppress: string[]): void {
+	for (const item of items) {
+		// Suppress all ambient items
+		if (item.signals?.timeRelevance === TimeRelevance.Ambient) {
+			suppress.push(item.id)
+			continue
+		}
+
+		// High-urgency alerts survive unboosted
+		if (
+			(item.type === WeatherFeedItemType.Alert || item.type === TflFeedItemType.Alert) &&
+			(item.signals?.urgency ?? 0) >= 0.8
+		) {
+			continue
+		}
+
+		// Demote everything else
+		switch (item.type) {
+			case CalendarFeedItemType.Event:
+			case CalendarFeedItemType.AllDay:
+			case CalDavFeedItemType.Event:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.6
+				break
+			case WeatherFeedItemType.Current:
+			case WeatherFeedItemType.Hourly:
+				boost[item.id] = (boost[item.id] ?? 0) - 0.5
+				break
+		}
+	}
+}
+
+
+function applyPreMeetingOverrides(
+	items: FeedItem[],
+	preMeeting: PreMeetingInfo,
+	boost: Record<string, number>,
+	suppress: string[],
+): void {
+	if (preMeeting.upcomingMeetingIds.size === 0) return
+
+	// Intentional override, not additive — the upcoming meeting should dominate
+	// regardless of what period rules assigned. Don't reorder this before period rules.
+	for (const meetingId of preMeeting.upcomingMeetingIds) {
+		boost[meetingId] = 0.9
+	}
+
+	for (const item of items) {
+		if (preMeeting.upcomingMeetingIds.has(item.id)) continue
+
+		switch (item.type) {
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) + 0.5
+				break
+			case WeatherFeedItemType.Current:
+				if (preMeeting.hasLocationMeeting) {
+					boost[item.id] = (boost[item.id] ?? 0) + 0.4
+				}
+				break
+		}
+
+		// Suppress items that explicitly declare low urgency.
+		// Items without signals are left alone — absence of urgency is not low urgency.
+		if (item.signals && item.signals.urgency !== undefined && item.signals.urgency < 0.3) {
+			suppress.push(item.id)
+		}
+	}
+}
+
+function applyWindDown(
+	items: FeedItem[],
+	now: Date,
+	dayType: DayType,
+	boost: Record<string, number>,
+): void {
+	if (dayType !== DayType.Weekday) return
+
+	const hour = now.getHours()
+	const minutes = now.getMinutes()
+
+	if (hour < 20 || hour >= 22) return
+
+	// Gradient: 20:00 → -0.1, 21:00 → -0.2, 21:30+ → -0.3
+	let additionalDemotion: number
+	if (hour === 20) {
+		additionalDemotion = -0.1
+	} else if (hour === 21 && minutes < 30) {
+		additionalDemotion = -0.2
+	} else {
+		additionalDemotion = -0.3
+	}
+
+	for (const item of items) {
+		switch (item.type) {
+			case CalendarFeedItemType.Event:
+			case CalendarFeedItemType.AllDay:
+			case CalDavFeedItemType.Event:
+			case TflFeedItemType.Alert:
+				boost[item.id] = (boost[item.id] ?? 0) + additionalDemotion
+				break
+		}
+	}
+}
+
+
+function applyTransitionLookahead(
+	items: FeedItem[],
+	now: Date,
+	currentPeriod: TimePeriod,
+	dayType: DayType,
+	boost: Record<string, number>,
+): void {
+	const next = getNextPeriodBoundary(now)
+	if (next.msUntil > TRANSITION_WINDOW_MS) return
+
+	// Apply a +0.2 secondary boost to items that would be boosted in the next period
+	const nextPeriodBoost = getNextPeriodBoostTargets(next.period, dayType)
+
+	for (const item of items) {
+		if (nextPeriodBoost.has(item.type)) {
+			boost[item.id] = (boost[item.id] ?? 0) + 0.2
+		}
+	}
+}
+
+/**
+ * Returns the set of item types that get boosted in a given period+dayType.
+ */
+function getNextPeriodBoostTargets(period: TimePeriod, dayType: DayType): ReadonlySet<string> {
+	const targets = new Set<string>()
+
+	switch (period) {
+		case TimePeriod.Morning:
+			targets.add(WeatherFeedItemType.Current)
+			if (dayType === DayType.Weekday) {
+				targets.add(WeatherFeedItemType.Alert)
+				targets.add(TflFeedItemType.Alert)
+			} else {
+				targets.add(WeatherFeedItemType.Daily)
+			}
+			break
+		case TimePeriod.Afternoon:
+			if (dayType === DayType.Weekend) {
+				targets.add(WeatherFeedItemType.Current)
+			}
+			break
+		case TimePeriod.Evening:
+			targets.add(WeatherFeedItemType.Daily)
+			if (dayType === DayType.Weekend) {
+				targets.add(WeatherFeedItemType.Current)
+			}
+			break
+		case TimePeriod.Night:
+			// Night doesn't boost much — transition toward night means demoting,
+			// which is handled by wind-down. No positive targets here.
+			break
+	}
+
+	return targets
+}
+
+
+function applyWeatherTimeCorrelation(
+	items: FeedItem[],
+	period: TimePeriod,
+	dayType: DayType,
+	hasEveningEventWithLocation: boolean,
+	boost: Record<string, number>,
+): void {
+	for (const item of items) {
+		switch (item.type) {
+			case WeatherFeedItemType.Alert: {
+				const current = boost[item.id] ?? 0
+				if (current < 0.5) {
+					boost[item.id] = 0.5
+				}
+				break
+			}
+			case WeatherFeedItemType.Current:
+				if (period === TimePeriod.Morning && dayType === DayType.Weekday && hasPrecipitationOrExtreme(item)) {
+					boost[item.id] = (boost[item.id] ?? 0) + 0.1
+				}
+				if (period === TimePeriod.Evening && hasEveningEventWithLocation) {
+					boost[item.id] = (boost[item.id] ?? 0) + 0.2
+				}
+				break
+		}
+	}
+}
+
+function hasEveningCalendarEventWithLocation(items: FeedItem[], now: Date): boolean {
+	const todayEvening17 = new Date(now)
+	todayEvening17.setHours(17, 0, 0, 0)
+	const todayNight22 = new Date(now)
+	todayNight22.setHours(22, 0, 0, 0)
+
+	for (const item of items) {
+		if (!CALENDAR_EVENT_TYPES.has(item.type)) continue
+
+		const data = item.data as CalendarEventData | CalDavEventData
+		const startMs = getEventStartTime(data).getTime()
+		if (startMs >= todayEvening17.getTime() && startMs < todayNight22.getTime()) {
+			if (data.location) return true
+		}
+	}
+
+	return false
+}
+
+

packages/aris-source-apple-calendar/src/calendar-source.test.ts

@@ -1,473 +0,0 @@
-import type { Context } from "@aris/core"
-
-import { contextValue } from "@aris/core"
-import { describe, expect, test } from "bun:test"
-import { readFileSync } from "node:fs"
-import { join } from "node:path"
-
-import type {
-	CalendarCredentialProvider,
-	CalendarCredentials,
-	CalendarDAVCalendar,
-	CalendarDAVClient,
-	CalendarDAVObject,
-	CalendarEventData,
-} from "./types.ts"
-
-import { CalendarKey } from "./calendar-context.ts"
-import { CalendarSource, computePriority } from "./calendar-source.ts"
-
-function loadFixture(name: string): string {
-	return readFileSync(join(import.meta.dir, "..", "fixtures", name), "utf-8")
-}
-
-function createContext(time: Date): Context {
-	return { time }
-}
-
-const mockCredentials: CalendarCredentials = {
-	accessToken: "mock-access-token",
-	refreshToken: "mock-refresh-token",
-	expiresAt: Date.now() + 3600000,
-	tokenUrl: "https://appleid.apple.com/auth/token",
-	clientId: "com.example.aris",
-	clientSecret: "mock-secret",
-}
-
-class NullCredentialProvider implements CalendarCredentialProvider {
-	async fetchCredentials(_userId: string): Promise<CalendarCredentials | null> {
-		return null
-	}
-}
-
-class MockCredentialProvider implements CalendarCredentialProvider {
-	async fetchCredentials(_userId: string): Promise<CalendarCredentials | null> {
-		return mockCredentials
-	}
-}
-
-class MockDAVClient implements CalendarDAVClient {
-	credentials: Record<string, unknown> = {}
-	fetchCalendarsCallCount = 0
-	private calendars: CalendarDAVCalendar[]
-	private objectsByCalendarUrl: Record<string, CalendarDAVObject[]>
-
-	constructor(
-		calendars: CalendarDAVCalendar[],
-		objectsByCalendarUrl: Record<string, CalendarDAVObject[]>,
-	) {
-		this.calendars = calendars
-		this.objectsByCalendarUrl = objectsByCalendarUrl
-	}
-
-	async login(): Promise<void> {}
-
-	async fetchCalendars(): Promise<CalendarDAVCalendar[]> {
-		this.fetchCalendarsCallCount++
-		return this.calendars
-	}
-
-	async fetchCalendarObjects(params: {
-		calendar: CalendarDAVCalendar
-		timeRange: { start: string; end: string }
-	}): Promise<CalendarDAVObject[]> {
-		return this.objectsByCalendarUrl[params.calendar.url] ?? []
-	}
-}
-
-describe("CalendarSource", () => {
-	test("has correct id", () => {
-		const source = new CalendarSource(new NullCredentialProvider(), "user-1")
-		expect(source.id).toBe("aris.apple-calendar")
-	})
-
-	test("returns empty array when credentials are null", async () => {
-		const source = new CalendarSource(new NullCredentialProvider(), "user-1")
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-		expect(items).toEqual([])
-	})
-
-	test("returns empty array when no calendars exist", async () => {
-		const client = new MockDAVClient([], {})
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-		expect(items).toEqual([])
-	})
-
-	test("returns feed items from a single calendar", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-
-		expect(items).toHaveLength(1)
-		expect(items[0]!.type).toBe("calendar-event")
-		expect(items[0]!.id).toBe("calendar-event-single-event-001@test")
-		expect(items[0]!.data.title).toBe("Team Standup")
-		expect(items[0]!.data.location).toBe("Conference Room A")
-		expect(items[0]!.data.calendarName).toBe("Work")
-		expect(items[0]!.data.attendees).toHaveLength(2)
-		expect(items[0]!.data.alarms).toHaveLength(2)
-	})
-
-	test("returns feed items from multiple calendars", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-			"/cal/personal": [
-				{
-					url: "/cal/personal/event2.ics",
-					data: loadFixture("all-day-event.ics"),
-				},
-			],
-		}
-		const client = new MockDAVClient(
-			[
-				{ url: "/cal/work", displayName: "Work" },
-				{ url: "/cal/personal", displayName: "Personal" },
-			],
-			objects,
-		)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-
-		expect(items).toHaveLength(2)
-
-		const standup = items.find((i) => i.data.title === "Team Standup")
-		const holiday = items.find((i) => i.data.title === "Company Holiday")
-
-		expect(standup).toBeDefined()
-		expect(standup!.data.calendarName).toBe("Work")
-
-		expect(holiday).toBeDefined()
-		expect(holiday!.data.calendarName).toBe("Personal")
-		expect(holiday!.data.isAllDay).toBe(true)
-	})
-
-	test("skips objects with non-string data", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [
-				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
-				{ url: "/cal/work/bad.ics", data: 12345 },
-				{ url: "/cal/work/empty.ics" },
-			],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-		expect(items).toHaveLength(1)
-		expect(items[0]!.data.title).toBe("Team Standup")
-	})
-
-	test("uses context time as feed item timestamp", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const now = new Date("2026-01-15T12:00:00Z")
-		const items = await source.fetchItems(createContext(now))
-		expect(items[0]!.timestamp).toEqual(now)
-	})
-
-	test("assigns priority based on event proximity", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [
-				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
-				{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") },
-			],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		// 2 hours before the event at 14:00
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-
-		const standup = items.find((i) => i.data.title === "Team Standup")
-		const holiday = items.find((i) => i.data.title === "Company Holiday")
-
-		expect(standup!.priority).toBe(0.7) // within 2 hours
-		expect(holiday!.priority).toBe(0.3) // all-day
-	})
-
-	test("handles calendar with non-string displayName", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/weird": [
-				{
-					url: "/cal/weird/event1.ics",
-					data: loadFixture("minimal-event.ics"),
-				},
-			],
-		}
-		const client = new MockDAVClient(
-			[{ url: "/cal/weird", displayName: { _cdata: "Weird Calendar" } }],
-			objects,
-		)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-		expect(items[0]!.data.calendarName).toBeNull()
-	})
-
-	test("handles recurring events with exceptions", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [
-				{
-					url: "/cal/work/recurring.ics",
-					data: loadFixture("recurring-event.ics"),
-				},
-			],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const items = await source.fetchItems(createContext(new Date("2026-01-15T08:00:00Z")))
-
-		expect(items).toHaveLength(2)
-
-		const base = items.find((i) => i.data.title === "Weekly Sync")
-		const exception = items.find((i) => i.data.title === "Weekly Sync (moved)")
-
-		expect(base).toBeDefined()
-		expect(base!.data.recurrenceId).toBeNull()
-
-		expect(exception).toBeDefined()
-		expect(exception!.data.recurrenceId).not.toBeNull()
-		expect(exception!.id).toContain("-")
-	})
-
-	test("caches events within the same refresh cycle", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const context = createContext(new Date("2026-01-15T12:00:00Z"))
-
-		await source.fetchContext(context)
-		await source.fetchItems(context)
-
-		// Same context.time reference — fetchEvents should only hit the client once
-		expect(client.fetchCalendarsCallCount).toBe(1)
-	})
-
-	test("refetches events for a different context time", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
-		await source.fetchItems(createContext(new Date("2026-01-15T13:00:00Z")))
-
-		// Different context.time references — should fetch twice
-		expect(client.fetchCalendarsCallCount).toBe(2)
-	})
-})
-
-describe("CalendarSource.fetchContext", () => {
-	test("returns empty context when credentials are null", async () => {
-		const source = new CalendarSource(new NullCredentialProvider(), "user-1")
-		const ctx = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
-		const calendar = contextValue(ctx as Context, CalendarKey)
-
-		expect(calendar).toBeDefined()
-		expect(calendar!.inProgress).toEqual([])
-		expect(calendar!.nextEvent).toBeNull()
-		expect(calendar!.hasTodayEvents).toBe(false)
-		expect(calendar!.todayEventCount).toBe(0)
-	})
-
-	test("identifies in-progress events", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		// 14:30 is during the 14:00-15:00 event
-		const ctx = await source.fetchContext(createContext(new Date("2026-01-15T14:30:00Z")))
-		const calendar = contextValue(ctx as Context, CalendarKey)
-
-		expect(calendar!.inProgress).toHaveLength(1)
-		expect(calendar!.inProgress[0]!.title).toBe("Team Standup")
-	})
-
-	test("identifies next upcoming event", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		// 12:00 is before the 14:00 event
-		const ctx = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
-		const calendar = contextValue(ctx as Context, CalendarKey)
-
-		expect(calendar!.inProgress).toHaveLength(0)
-		expect(calendar!.nextEvent).not.toBeNull()
-		expect(calendar!.nextEvent!.title).toBe("Team Standup")
-	})
-
-	test("excludes all-day events from inProgress and nextEvent", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") }],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const ctx = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
-		const calendar = contextValue(ctx as Context, CalendarKey)
-
-		expect(calendar!.inProgress).toHaveLength(0)
-		expect(calendar!.nextEvent).toBeNull()
-		expect(calendar!.hasTodayEvents).toBe(true)
-		expect(calendar!.todayEventCount).toBe(1)
-	})
-
-	test("counts all events including all-day in todayEventCount", async () => {
-		const objects: Record<string, CalendarDAVObject[]> = {
-			"/cal/work": [
-				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
-				{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") },
-			],
-		}
-		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
-		const source = new CalendarSource(new MockCredentialProvider(), "user-1", {
-			davClient: client,
-		})
-
-		const ctx = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
-		const calendar = contextValue(ctx as Context, CalendarKey)
-
-		expect(calendar!.todayEventCount).toBe(2)
-		expect(calendar!.hasTodayEvents).toBe(true)
-	})
-})
-
-describe("computePriority", () => {
-	const now = new Date("2026-01-15T12:00:00Z")
-
-	function makeEvent(overrides: Partial<CalendarEventData>): CalendarEventData {
-		return {
-			uid: "test-uid",
-			title: "Test",
-			startDate: new Date("2026-01-15T14:00:00Z"),
-			endDate: new Date("2026-01-15T15:00:00Z"),
-			isAllDay: false,
-			location: null,
-			description: null,
-			calendarName: null,
-			status: null,
-			url: null,
-			organizer: null,
-			attendees: [],
-			alarms: [],
-			recurrenceId: null,
-			...overrides,
-		}
-	}
-
-	test("all-day events get priority 0.3", () => {
-		const event = makeEvent({ isAllDay: true })
-		expect(computePriority(event, now)).toBe(0.3)
-	})
-
-	test("events starting within 30 minutes get priority 0.9", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T12:20:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.9)
-	})
-
-	test("events starting exactly at 30 minutes get priority 0.9", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T12:30:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.9)
-	})
-
-	test("events starting within 2 hours get priority 0.7", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T13:00:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.7)
-	})
-
-	test("events later today get priority 0.5", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T20:00:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.5)
-	})
-
-	test("in-progress events get priority 0.8", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T11:00:00Z"),
-			endDate: new Date("2026-01-15T13:00:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.8)
-	})
-
-	test("fully past events get priority 0.2", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-15T09:00:00Z"),
-			endDate: new Date("2026-01-15T10:00:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.2)
-	})
-
-	test("events on future days get priority 0.2", () => {
-		const event = makeEvent({
-			startDate: new Date("2026-01-16T10:00:00Z"),
-		})
-		expect(computePriority(event, now)).toBe(0.2)
-	})
-
-	test("priority boundaries are correct", () => {
-		// 31 minutes from now should be 0.7 (within 2 hours, not within 30 min)
-		const event31min = makeEvent({
-			startDate: new Date("2026-01-15T12:31:00Z"),
-		})
-		expect(computePriority(event31min, now)).toBe(0.7)
-
-		// 2 hours 1 minute from now should be 0.5 (later today, not within 2 hours)
-		const event2h1m = makeEvent({
-			startDate: new Date("2026-01-15T14:01:00Z"),
-		})
-		expect(computePriority(event2h1m, now)).toBe(0.5)
-	})
-})

packages/aris-source-apple-calendar/src/calendar-source.ts

@@ -1,251 +0,0 @@
-import type { ActionDefinition, Context, FeedSource } from "@aris/core"
-import { UnknownActionError } from "@aris/core"
-
-import { DAVClient } from "tsdav"
-
-import type {
-	CalendarCredentialProvider,
-	CalendarCredentials,
-	CalendarDAVClient,
-	CalendarEventData,
-	CalendarFeedItem,
-} from "./types.ts"
-
-export interface CalendarSourceOptions {
-	/** Number of additional days beyond today to fetch. Default: 0 (today only). */
-	lookAheadDays?: number
-	/** Optional DAVClient instance for testing. Uses tsdav DAVClient by default. */
-	davClient?: CalendarDAVClient
-}
-
-import { CalendarKey, type CalendarContext } from "./calendar-context.ts"
-import { parseICalEvents } from "./ical-parser.ts"
-
-const ICLOUD_CALDAV_URL = "https://caldav.icloud.com"
-const DEFAULT_LOOK_AHEAD_DAYS = 0
-
-/**
- * A FeedSource that fetches Apple Calendar events via CalDAV.
- *
- * Credentials are provided by an injected CalendarCredentialProvider.
- * The server is responsible for managing OAuth tokens and storage.
- *
- * @example
- * ```ts
- * const source = new CalendarSource(credentialProvider, "user-123")
- * const engine = new FeedEngine()
- * engine.register(source)
- * ```
- */
-export class CalendarSource implements FeedSource<CalendarFeedItem> {
-	readonly id = "aris.apple-calendar"
-
-	private readonly credentialProvider: CalendarCredentialProvider
-	private readonly userId: string
-	private readonly lookAheadDays: number
-	private readonly injectedClient: CalendarDAVClient | null
-	private davClient: CalendarDAVClient | null = null
-	private lastAccessToken: string | null = null
-	private cachedEvents: { time: Date; events: CalendarEventData[] } | null = null
-
-	constructor(
-		credentialProvider: CalendarCredentialProvider,
-		userId: string,
-		options?: CalendarSourceOptions,
-	) {
-		this.credentialProvider = credentialProvider
-		this.userId = userId
-		this.lookAheadDays = options?.lookAheadDays ?? DEFAULT_LOOK_AHEAD_DAYS
-		this.injectedClient = options?.davClient ?? null
-	}
-
-	async listActions(): Promise<Record<string, ActionDefinition>> {
-		return {}
-	}
-
-	async executeAction(actionId: string): Promise<void> {
-		throw new UnknownActionError(actionId)
-	}
-
-	async fetchContext(context: Context): Promise<Partial<Context> | null> {
-		const events = await this.fetchEvents(context)
-		if (events.length === 0) {
-			return {
-				[CalendarKey]: {
-					inProgress: [],
-					nextEvent: null,
-					hasTodayEvents: false,
-					todayEventCount: 0,
-				},
-			}
-		}
-
-		const now = context.time
-		const inProgress = events.filter((e) => !e.isAllDay && e.startDate <= now && e.endDate > now)
-
-		const upcoming = events
-			.filter((e) => !e.isAllDay && e.startDate > now)
-			.sort((a, b) => a.startDate.getTime() - b.startDate.getTime())
-
-		const calendarContext: CalendarContext = {
-			inProgress,
-			nextEvent: upcoming[0] ?? null,
-			hasTodayEvents: events.length > 0,
-			todayEventCount: events.length,
-		}
-
-		return { [CalendarKey]: calendarContext }
-	}
-
-	async fetchItems(context: Context): Promise<CalendarFeedItem[]> {
-		const now = context.time
-		const events = await this.fetchEvents(context)
-		return events.map((event) => createFeedItem(event, now))
-	}
-
-	private async fetchEvents(context: Context): Promise<CalendarEventData[]> {
-		if (this.cachedEvents && this.cachedEvents.time === context.time) {
-			return this.cachedEvents.events
-		}
-
-		const credentials = await this.credentialProvider.fetchCredentials(this.userId)
-		if (!credentials) {
-			return []
-		}
-
-		const client = await this.connectClient(credentials)
-		const calendars = await client.fetchCalendars()
-
-		const { start, end } = computeTimeRange(context.time, this.lookAheadDays)
-
-		const results = await Promise.allSettled(
-			calendars.map(async (calendar) => {
-				const objects = await client.fetchCalendarObjects({
-					calendar,
-					timeRange: {
-						start: start.toISOString(),
-						end: end.toISOString(),
-					},
-				})
-				// tsdav types displayName as string | Record<string, unknown> | undefined
-				// because the XML parser can return an object for some responses
-				const calendarName = typeof calendar.displayName === "string" ? calendar.displayName : null
-				return { objects, calendarName }
-			}),
-		)
-
-		const allEvents: CalendarEventData[] = []
-		for (const result of results) {
-			if (result.status !== "fulfilled") continue
-			const { objects, calendarName } = result.value
-			for (const obj of objects) {
-				if (typeof obj.data !== "string") continue
-
-				const events = parseICalEvents(obj.data, calendarName)
-				for (const event of events) {
-					allEvents.push(event)
-				}
-			}
-		}
-
-		this.cachedEvents = { time: context.time, events: allEvents }
-		return allEvents
-	}
-
-	/**
-	 * Returns a ready-to-use DAVClient. Creates and logs in a new client
-	 * on first call; reuses the existing one on subsequent calls, updating
-	 * credentials if the access token has changed.
-	 */
-	private async connectClient(credentials: CalendarCredentials): Promise<CalendarDAVClient> {
-		if (this.injectedClient) {
-			return this.injectedClient
-		}
-
-		const davCredentials = {
-			tokenUrl: credentials.tokenUrl,
-			refreshToken: credentials.refreshToken,
-			accessToken: credentials.accessToken,
-			expiration: credentials.expiresAt,
-			clientId: credentials.clientId,
-			clientSecret: credentials.clientSecret,
-		}
-
-		if (!this.davClient) {
-			this.davClient = new DAVClient({
-				serverUrl: ICLOUD_CALDAV_URL,
-				credentials: davCredentials,
-				authMethod: "Oauth",
-				defaultAccountType: "caldav",
-			})
-			await this.davClient.login()
-			this.lastAccessToken = credentials.accessToken
-			return this.davClient
-		}
-
-		if (credentials.accessToken !== this.lastAccessToken) {
-			this.davClient.credentials = davCredentials
-			this.lastAccessToken = credentials.accessToken
-		}
-
-		return this.davClient
-	}
-}
-
-function computeTimeRange(now: Date, lookAheadDays: number): { start: Date; end: Date } {
-	const start = new Date(now)
-	start.setUTCHours(0, 0, 0, 0)
-
-	const end = new Date(start)
-	end.setUTCDate(end.getUTCDate() + 1 + lookAheadDays)
-
-	return { start, end }
-}
-
-export function computePriority(event: CalendarEventData, now: Date): number {
-	if (event.isAllDay) {
-		return 0.3
-	}
-
-	const msUntilStart = event.startDate.getTime() - now.getTime()
-
-	// Event already started
-	if (msUntilStart < 0) {
-		const isInProgress = now.getTime() < event.endDate.getTime()
-		// Currently happening events are high priority; fully past events are low
-		return isInProgress ? 0.8 : 0.2
-	}
-
-	// Starting within 30 minutes
-	if (msUntilStart <= 30 * 60 * 1000) {
-		return 0.9
-	}
-
-	// Starting within 2 hours
-	if (msUntilStart <= 2 * 60 * 60 * 1000) {
-		return 0.7
-	}
-
-	// Later today (within 24 hours from start of day)
-	const startOfDay = new Date(now)
-	startOfDay.setUTCHours(0, 0, 0, 0)
-	const endOfDay = new Date(startOfDay)
-	endOfDay.setUTCDate(endOfDay.getUTCDate() + 1)
-
-	if (event.startDate.getTime() < endOfDay.getTime()) {
-		return 0.5
-	}
-
-	// Future days
-	return 0.2
-}
-
-function createFeedItem(event: CalendarEventData, now: Date): CalendarFeedItem {
-	return {
-		id: `calendar-event-${event.uid}${event.recurrenceId ? `-${event.recurrenceId}` : ""}`,
-		type: "calendar-event",
-		priority: computePriority(event, now),
-		timestamp: now,
-		data: event,
-	}
-}

packages/aris-source-apple-calendar/src/ical-parser.test.ts

@@ -1,107 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import { readFileSync } from "node:fs"
-import { join } from "node:path"
-
-import { parseICalEvents } from "./ical-parser.ts"
-
-function loadFixture(name: string): string {
-	return readFileSync(join(import.meta.dir, "..", "fixtures", name), "utf-8")
-}
-
-describe("parseICalEvents", () => {
-	test("parses a full event with all fields", () => {
-		const events = parseICalEvents(loadFixture("single-event.ics"), "Work")
-
-		expect(events).toHaveLength(1)
-		const event = events[0]!
-
-		expect(event.uid).toBe("single-event-001@test")
-		expect(event.title).toBe("Team Standup")
-		expect(event.startDate).toEqual(new Date("2026-01-15T14:00:00Z"))
-		expect(event.endDate).toEqual(new Date("2026-01-15T15:00:00Z"))
-		expect(event.isAllDay).toBe(false)
-		expect(event.location).toBe("Conference Room A")
-		expect(event.description).toBe("Daily standup meeting")
-		expect(event.calendarName).toBe("Work")
-		expect(event.status).toBe("confirmed")
-		expect(event.url).toBe("https://example.com/meeting/123")
-		expect(event.organizer).toBe("Alice Smith")
-		expect(event.recurrenceId).toBeNull()
-
-		expect(event.attendees).toHaveLength(2)
-		expect(event.attendees[0]).toEqual({
-			name: "Bob Jones",
-			email: "bob@example.com",
-			role: "required",
-			status: "accepted",
-		})
-		expect(event.attendees[1]).toEqual({
-			name: "Carol White",
-			email: "carol@example.com",
-			role: "optional",
-			status: "tentative",
-		})
-
-		expect(event.alarms).toHaveLength(2)
-		expect(event.alarms[0]).toEqual({ trigger: "-PT15M", action: "DISPLAY" })
-		expect(event.alarms[1]).toEqual({ trigger: "-PT5M", action: "AUDIO" })
-	})
-
-	test("parses an all-day event with optional fields as null", () => {
-		const events = parseICalEvents(loadFixture("all-day-event.ics"), null)
-
-		expect(events).toHaveLength(1)
-		const event = events[0]!
-
-		expect(event.isAllDay).toBe(true)
-		expect(event.title).toBe("Company Holiday")
-		expect(event.calendarName).toBeNull()
-		expect(event.location).toBeNull()
-		expect(event.description).toBeNull()
-		expect(event.url).toBeNull()
-		expect(event.organizer).toBeNull()
-		expect(event.attendees).toEqual([])
-		expect(event.alarms).toEqual([])
-	})
-
-	test("parses recurring event with exception", () => {
-		const events = parseICalEvents(loadFixture("recurring-event.ics"), "Team")
-
-		expect(events).toHaveLength(2)
-		expect(events[0]!.uid).toBe("recurring-001@test")
-		expect(events[1]!.uid).toBe("recurring-001@test")
-
-		const base = events.find((e) => e.title === "Weekly Sync")
-		expect(base).toBeDefined()
-		expect(base!.recurrenceId).toBeNull()
-
-		const exception = events.find((e) => e.title === "Weekly Sync (moved)")
-		expect(exception).toBeDefined()
-		expect(exception!.recurrenceId).not.toBeNull()
-	})
-
-	test("parses minimal event with defaults", () => {
-		const events = parseICalEvents(loadFixture("minimal-event.ics"), null)
-
-		expect(events).toHaveLength(1)
-		const event = events[0]!
-
-		expect(event.uid).toBe("minimal-001@test")
-		expect(event.title).toBe("Quick Chat")
-		expect(event.startDate).toEqual(new Date("2026-01-15T18:00:00Z"))
-		expect(event.endDate).toEqual(new Date("2026-01-15T19:00:00Z"))
-		expect(event.location).toBeNull()
-		expect(event.description).toBeNull()
-		expect(event.status).toBeNull()
-		expect(event.url).toBeNull()
-		expect(event.organizer).toBeNull()
-		expect(event.attendees).toEqual([])
-		expect(event.alarms).toEqual([])
-		expect(event.recurrenceId).toBeNull()
-	})
-
-	test("parses cancelled status", () => {
-		const events = parseICalEvents(loadFixture("cancelled-event.ics"), null)
-		expect(events[0]!.status).toBe("cancelled")
-	})
-})

packages/aris-source-apple-calendar/src/ical-parser.ts

@@ -1,150 +0,0 @@
-import ICAL from "ical.js"
-
-import {
-	AttendeeRole,
-	AttendeeStatus,
-	CalendarEventStatus,
-	type CalendarAlarm,
-	type CalendarAttendee,
-	type CalendarEventData,
-} from "./types.ts"
-
-/**
- * Parses a raw iCalendar string and extracts all VEVENT components
- * into CalendarEventData objects.
- *
- * @param icsData - Raw iCalendar string from a CalDAV response
- * @param calendarName - Display name of the calendar this event belongs to
- */
-export function parseICalEvents(icsData: string, calendarName: string | null): CalendarEventData[] {
-	const jcal = ICAL.parse(icsData)
-	const comp = new ICAL.Component(jcal)
-	const vevents = comp.getAllSubcomponents("vevent")
-
-	return vevents.map((vevent: InstanceType<typeof ICAL.Component>) =>
-		parseVEvent(vevent, calendarName),
-	)
-}
-
-function parseVEvent(
-	vevent: InstanceType<typeof ICAL.Component>,
-	calendarName: string | null,
-): CalendarEventData {
-	const event = new ICAL.Event(vevent)
-
-	return {
-		uid: event.uid ?? "",
-		title: event.summary ?? "",
-		startDate: event.startDate?.toJSDate() ?? new Date(0),
-		endDate: event.endDate?.toJSDate() ?? new Date(0),
-		isAllDay: event.startDate?.isDate ?? false,
-		location: event.location ?? null,
-		description: event.description ?? null,
-		calendarName,
-		status: parseStatus(asStringOrNull(vevent.getFirstPropertyValue("status"))),
-		url: asStringOrNull(vevent.getFirstPropertyValue("url")),
-		organizer: parseOrganizer(asStringOrNull(event.organizer), vevent),
-		attendees: parseAttendees(Array.isArray(event.attendees) ? event.attendees : []),
-		alarms: parseAlarms(vevent),
-		recurrenceId: event.recurrenceId ? event.recurrenceId.toString() : null,
-	}
-}
-
-function parseStatus(raw: string | null): CalendarEventStatus | null {
-	if (!raw) return null
-	switch (raw.toLowerCase()) {
-		case "confirmed":
-			return CalendarEventStatus.Confirmed
-		case "tentative":
-			return CalendarEventStatus.Tentative
-		case "cancelled":
-			return CalendarEventStatus.Cancelled
-		default:
-			return null
-	}
-}
-
-function parseOrganizer(
-	value: string | null,
-	vevent: InstanceType<typeof ICAL.Component>,
-): string | null {
-	if (!value) return null
-
-	// Try CN parameter first
-	const prop = vevent.getFirstProperty("organizer")
-	if (prop) {
-		const cn = prop.getParameter("cn") as string | undefined
-		if (cn) return cn
-	}
-
-	// Fall back to mailto: value
-	return value.replace(/^mailto:/i, "")
-}
-
-function parseAttendees(properties: unknown[]): CalendarAttendee[] {
-	if (properties.length === 0) return []
-
-	return properties.map((prop) => {
-		const p = prop as InstanceType<typeof ICAL.Property>
-		const value = asStringOrNull(p.getFirstValue())
-		const cn = asStringOrNull(p.getParameter("cn"))
-		const role = asStringOrNull(p.getParameter("role"))
-		const partstat = asStringOrNull(p.getParameter("partstat"))
-
-		return {
-			name: cn,
-			email: value ? value.replace(/^mailto:/i, "") : null,
-			role: parseAttendeeRole(role),
-			status: parseAttendeeStatus(partstat),
-		}
-	})
-}
-
-function parseAttendeeRole(raw: string | null): AttendeeRole | null {
-	if (!raw) return null
-	switch (raw.toUpperCase()) {
-		case "CHAIR":
-			return AttendeeRole.Chair
-		case "REQ-PARTICIPANT":
-			return AttendeeRole.Required
-		case "OPT-PARTICIPANT":
-			return AttendeeRole.Optional
-		default:
-			return null
-	}
-}
-
-function parseAttendeeStatus(raw: string | null): AttendeeStatus | null {
-	if (!raw) return null
-	switch (raw.toUpperCase()) {
-		case "ACCEPTED":
-			return AttendeeStatus.Accepted
-		case "DECLINED":
-			return AttendeeStatus.Declined
-		case "TENTATIVE":
-			return AttendeeStatus.Tentative
-		case "NEEDS-ACTION":
-			return AttendeeStatus.NeedsAction
-		default:
-			return null
-	}
-}
-
-function parseAlarms(vevent: InstanceType<typeof ICAL.Component>): CalendarAlarm[] {
-	const valarms = vevent.getAllSubcomponents("valarm")
-	if (!valarms || valarms.length === 0) return []
-
-	return valarms.map((valarm: InstanceType<typeof ICAL.Component>) => {
-		const trigger = valarm.getFirstPropertyValue("trigger")
-		const action = asStringOrNull(valarm.getFirstPropertyValue("action"))
-
-		return {
-			trigger: trigger ? trigger.toString() : "",
-			action: action ?? "DISPLAY",
-		}
-	})
-}
-
-function asStringOrNull(value: unknown): string | null {
-	return typeof value === "string" ? value : null
-}

packages/aris-source-apple-calendar/src/index.ts

@@ -1,16 +0,0 @@
-export { CalendarKey, type CalendarContext } from "./calendar-context.ts"
-export { CalendarSource, type CalendarSourceOptions } from "./calendar-source.ts"
-export {
-	CalendarEventStatus,
-	AttendeeRole,
-	AttendeeStatus,
-	type CalendarCredentials,
-	type CalendarCredentialProvider,
-	type CalendarDAVClient,
-	type CalendarDAVCalendar,
-	type CalendarDAVObject,
-	type CalendarAttendee,
-	type CalendarAlarm,
-	type CalendarEventData,
-	type CalendarFeedItem,
-} from "./types.ts"

packages/aris-source-caldav/README.md

@@ -0,0 +1,58 @@
+# @aris/source-caldav
+
+A FeedSource that fetches calendar events from any CalDAV server.
+
+## Usage
+
+```ts
+import { CalDavSource } from "@aris/source-caldav"
+
+// Basic auth (Nextcloud, Radicale, Baikal, iCloud, etc.)
+const source = new CalDavSource({
+	serverUrl: "https://caldav.example.com",
+	authMethod: "basic",
+	username: "user",
+	password: "pass",
+	lookAheadDays: 7, // optional, default: 0 (today only)
+	timeZone: "America/New_York", // optional, default: UTC
+})
+
+// OAuth
+const source = new CalDavSource({
+	serverUrl: "https://caldav.provider.com",
+	authMethod: "oauth",
+	accessToken: "...",
+	refreshToken: "...",
+	tokenUrl: "https://provider.com/oauth/token",
+})
+```
+
+### iCloud
+
+Use your Apple ID email as the username and an [app-specific password](https://support.apple.com/en-us/102654):
+
+```ts
+const source = new CalDavSource({
+	serverUrl: "https://caldav.icloud.com",
+	authMethod: "basic",
+	username: "you@icloud.com",
+	password: "<app-specific-password>",
+})
+```
+
+## Testing
+
+```bash
+bun test
+```
+
+### Live test
+
+`bun run test:live` connects to a real CalDAV server and prints all events to the console. It prompts for:
+
+- **CalDAV server URL** — e.g. `https://caldav.icloud.com`
+- **Username** — your account email
+- **Password** — your password (or app-specific password for iCloud)
+- **Look-ahead days** — how many days beyond today to fetch (default: 0)
+
+The script runs both `fetchContext` and `fetchItems`, printing the calendar context (in-progress events, next event, today's count) followed by each event with its title, time, location, signals, and attendees.

packages/aris-source-caldav/fixtures/daily-recurring-allday.ics

@@ -0,0 +1,12 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//Test//Test//EN
+BEGIN:VEVENT
+UID:daily-allday-001@test
+DTSTART;VALUE=DATE:20260112
+DTEND;VALUE=DATE:20260113
+SUMMARY:Daily Reminder
+RRULE:FREQ=DAILY;COUNT=7
+STATUS:CONFIRMED
+END:VEVENT
+END:VCALENDAR

packages/aris-source-caldav/fixtures/weekly-recurring-with-exception.ics

@@ -0,0 +1,20 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//Test//Test//EN
+BEGIN:VEVENT
+UID:weekly-exc-001@test
+DTSTART:20260101T140000Z
+DTEND:20260101T150000Z
+SUMMARY:Standup
+RRULE:FREQ=WEEKLY;BYDAY=TH;COUNT=8
+STATUS:CONFIRMED
+END:VEVENT
+BEGIN:VEVENT
+UID:weekly-exc-001@test
+RECURRENCE-ID:20260115T140000Z
+DTSTART:20260115T160000Z
+DTEND:20260115T170000Z
+SUMMARY:Standup (rescheduled)
+STATUS:CONFIRMED
+END:VEVENT
+END:VCALENDAR

packages/aris-source-caldav/fixtures/weekly-recurring.ics

@@ -0,0 +1,13 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//Test//Test//EN
+BEGIN:VEVENT
+UID:weekly-001@test
+DTSTART:20260101T100000Z
+DTEND:20260101T110000Z
+SUMMARY:Weekly Team Meeting
+RRULE:FREQ=WEEKLY;BYDAY=TH;COUNT=10
+LOCATION:Room B
+STATUS:CONFIRMED
+END:VEVENT
+END:VCALENDAR

packages/aris-source-caldav/package.json

@@ -1,11 +1,12 @@
 {
-	"name": "@aris/source-apple-calendar",
+	"name": "@aris/source-caldav",
 	"version": "0.0.0",
 	"type": "module",
 	"main": "src/index.ts",
 	"types": "src/index.ts",
 	"scripts": {
-		"test": "bun test ."
+		"test": "bun test .",
+		"test:live": "bun run scripts/test-live.ts"
 	},
 	"dependencies": {
 		"@aris/core": "workspace:*",

packages/aris-source-caldav/scripts/test-live.ts

@@ -0,0 +1,80 @@
+/**
+ * Live test script for CalDavSource.
+ *
+ * Usage:
+ *   bun run test-live.ts
+ *
+ * Writes feed items (with slots) to scripts/.cache/feed-items.json for inspection.
+ */
+
+import { mkdirSync, writeFileSync } from "node:fs"
+import { join } from "node:path"
+
+import { Context } from "@aris/core"
+
+import { CalDavSource } from "../src/index.ts"
+
+const serverUrl = prompt("CalDAV server URL:")
+const username = prompt("Username:")
+const password = prompt("Password:")
+const lookAheadRaw = prompt("Look-ahead days (default 0):")
+
+if (!serverUrl || !username || !password) {
+	console.error("Server URL, username, and password are required.")
+	process.exit(1)
+}
+
+const lookAheadDays = Number(lookAheadRaw) || 0
+
+const source = new CalDavSource({
+	serverUrl,
+	authMethod: "basic",
+	username,
+	password,
+	lookAheadDays,
+})
+
+const context = new Context()
+
+console.log(`\nFetching from ${serverUrl} as ${username} (lookAheadDays=${lookAheadDays})...\n`)
+
+const contextResult = await source.fetchContext(context)
+const items = await source.fetchItems(context)
+
+console.log("=== Context ===")
+console.log(JSON.stringify(contextResult, null, 2))
+
+console.log(`\n=== Feed Items (${items.length}) ===`)
+for (const item of items) {
+	console.log(`\n--- ${item.data.title} ---`)
+	console.log(`  ID:         ${item.id}`)
+	console.log(`  Calendar:   ${item.data.calendarName ?? "(unknown)"}`)
+	console.log(`  Start:      ${item.data.startDate.toISOString()}`)
+	console.log(`  End:        ${item.data.endDate.toISOString()}`)
+	console.log(`  All-day:    ${item.data.isAllDay}`)
+	console.log(`  Location:   ${item.data.location ?? "(none)"}`)
+	console.log(`  Status:     ${item.data.status ?? "(none)"}`)
+	console.log(`  Urgency:    ${item.signals?.urgency}`)
+	console.log(`  Relevance:  ${item.signals?.timeRelevance}`)
+	if (item.slots) {
+		console.log(`  Slots:      ${Object.keys(item.slots).join(", ")}`)
+	}
+	if (item.data.attendees.length > 0) {
+		console.log(`  Attendees:  ${item.data.attendees.map((a) => a.name ?? a.email).join(", ")}`)
+	}
+	if (item.data.description) {
+		console.log(`  Desc:       ${item.data.description.slice(0, 100)}`)
+	}
+}
+
+if (items.length === 0) {
+	console.log("(no events found in the time window)")
+}
+
+// Write feed items to .cache for slot testing
+const cacheDir = join(import.meta.dir, ".cache")
+mkdirSync(cacheDir, { recursive: true })
+
+const outPath = join(cacheDir, "feed-items.json")
+writeFileSync(outPath, JSON.stringify(items, null, 2))
+console.log(`\nFeed items written to ${outPath}`)

packages/aris-source-caldav/src/caldav-source.test.ts

@@ -0,0 +1,537 @@
+import type { ContextEntry } from "@aris/core"
+
+import { Context, TimeRelevance } from "@aris/core"
+import { describe, expect, test } from "bun:test"
+import { readFileSync } from "node:fs"
+import { join } from "node:path"
+
+import type {
+	CalDavDAVCalendar,
+	CalDavDAVClient,
+	CalDavDAVObject,
+	CalDavEventData,
+} from "./types.ts"
+
+import { CalDavSource, computeSignals } from "./caldav-source.ts"
+import { CalDavCalendarKey, type CalendarContext } from "./calendar-context.ts"
+
+function loadFixture(name: string): string {
+	return readFileSync(join(import.meta.dir, "..", "fixtures", name), "utf-8")
+}
+
+function createContext(time: Date): Context {
+	return new Context(time)
+}
+
+/** Extract the CalendarContext value from fetchContext entries. */
+function extractCalendar(entries: readonly ContextEntry[] | null): CalendarContext | undefined {
+	if (!entries) return undefined
+	const entry = entries.find(([key]) => key === CalDavCalendarKey)
+	return entry?.[1] as CalendarContext | undefined
+}
+
+class MockDAVClient implements CalDavDAVClient {
+	credentials: Record<string, unknown> = {}
+	fetchCalendarsCallCount = 0
+	lastTimeRange: { start: string; end: string } | null = null
+	private calendars: CalDavDAVCalendar[]
+	private objectsByCalendarUrl: Record<string, CalDavDAVObject[]>
+
+	constructor(
+		calendars: CalDavDAVCalendar[],
+		objectsByCalendarUrl: Record<string, CalDavDAVObject[]>,
+	) {
+		this.calendars = calendars
+		this.objectsByCalendarUrl = objectsByCalendarUrl
+	}
+
+	async login(): Promise<void> {}
+
+	async fetchCalendars(): Promise<CalDavDAVCalendar[]> {
+		this.fetchCalendarsCallCount++
+		return this.calendars
+	}
+
+	async fetchCalendarObjects(params: {
+		calendar: CalDavDAVCalendar
+		timeRange: { start: string; end: string }
+	}): Promise<CalDavDAVObject[]> {
+		this.lastTimeRange = params.timeRange
+		return this.objectsByCalendarUrl[params.calendar.url] ?? []
+	}
+}
+
+function createSource(client: MockDAVClient, lookAheadDays?: number): CalDavSource {
+	return new CalDavSource({
+		serverUrl: "https://caldav.example.com",
+		authMethod: "basic",
+		username: "user",
+		password: "pass",
+		davClient: client,
+		lookAheadDays,
+	})
+}
+
+describe("CalDavSource", () => {
+	test("has correct id", () => {
+		const client = new MockDAVClient([], {})
+		const source = createSource(client)
+		expect(source.id).toBe("aris.caldav")
+	})
+
+	test("returns empty array when no calendars exist", async () => {
+		const client = new MockDAVClient([], {})
+		const source = createSource(client)
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+		expect(items).toEqual([])
+	})
+
+	test("returns feed items from a single calendar", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+
+		expect(items).toHaveLength(1)
+		expect(items[0]!.type).toBe("caldav-event")
+		expect(items[0]!.id).toBe("caldav-event-single-event-001@test")
+		expect(items[0]!.data.title).toBe("Team Standup")
+		expect(items[0]!.data.location).toBe("Conference Room A")
+		expect(items[0]!.data.calendarName).toBe("Work")
+		expect(items[0]!.data.attendees).toHaveLength(2)
+		expect(items[0]!.data.alarms).toHaveLength(2)
+	})
+
+	test("returns feed items from multiple calendars", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+			"/cal/personal": [
+				{
+					url: "/cal/personal/event2.ics",
+					data: loadFixture("all-day-event.ics"),
+				},
+			],
+		}
+		const client = new MockDAVClient(
+			[
+				{ url: "/cal/work", displayName: "Work" },
+				{ url: "/cal/personal", displayName: "Personal" },
+			],
+			objects,
+		)
+		const source = createSource(client)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+
+		expect(items).toHaveLength(2)
+
+		const standup = items.find((i) => i.data.title === "Team Standup")
+		const holiday = items.find((i) => i.data.title === "Company Holiday")
+
+		expect(standup).toBeDefined()
+		expect(standup!.data.calendarName).toBe("Work")
+
+		expect(holiday).toBeDefined()
+		expect(holiday!.data.calendarName).toBe("Personal")
+		expect(holiday!.data.isAllDay).toBe(true)
+	})
+
+	test("skips objects with non-string data", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [
+				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
+				{ url: "/cal/work/bad.ics", data: 12345 },
+				{ url: "/cal/work/empty.ics" },
+			],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+		expect(items).toHaveLength(1)
+		expect(items[0]!.data.title).toBe("Team Standup")
+	})
+
+	test("uses context time as feed item timestamp", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const now = new Date("2026-01-15T12:00:00Z")
+		const items = await source.fetchItems(createContext(now))
+		expect(items[0]!.timestamp).toEqual(now)
+	})
+
+	test("assigns signals based on event proximity", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [
+				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
+				{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") },
+			],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		// 2 hours before the event at 14:00
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+
+		const standup = items.find((i) => i.data.title === "Team Standup")
+		const holiday = items.find((i) => i.data.title === "Company Holiday")
+
+		expect(standup!.signals!.urgency).toBe(0.7) // within 2 hours
+		expect(standup!.signals!.timeRelevance).toBe(TimeRelevance.Upcoming)
+		expect(holiday!.signals!.urgency).toBe(0.3) // all-day
+		expect(holiday!.signals!.timeRelevance).toBe(TimeRelevance.Ambient)
+	})
+
+	test("handles calendar with non-string displayName", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/weird": [
+				{
+					url: "/cal/weird/event1.ics",
+					data: loadFixture("minimal-event.ics"),
+				},
+			],
+		}
+		const client = new MockDAVClient(
+			[{ url: "/cal/weird", displayName: { _cdata: "Weird Calendar" } }],
+			objects,
+		)
+		const source = createSource(client)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+		expect(items[0]!.data.calendarName).toBeNull()
+	})
+
+	test("expands recurring events within the time range", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [
+				{
+					url: "/cal/work/recurring.ics",
+					data: loadFixture("recurring-event.ics"),
+				},
+			],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		// lookAheadDays=0 → range is Jan 15 only
+		const source = createSource(client)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T08:00:00Z")))
+
+		// Only the Jan 15 occurrence falls in the single-day window
+		expect(items).toHaveLength(1)
+		expect(items[0]!.data.title).toBe("Weekly Sync")
+		expect(items[0]!.data.startDate).toEqual(new Date("2026-01-15T09:00:00Z"))
+	})
+
+	test("includes exception overrides when they fall in range", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [
+				{
+					url: "/cal/work/recurring.ics",
+					data: loadFixture("recurring-event.ics"),
+				},
+			],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		// lookAheadDays=8 → range covers Jan 15 through Jan 23, includes the Jan 22 exception
+		const source = createSource(client, 8)
+
+		const items = await source.fetchItems(createContext(new Date("2026-01-15T08:00:00Z")))
+
+		const base = items.filter((i) => i.data.title === "Weekly Sync")
+		const exception = items.find((i) => i.data.title === "Weekly Sync (moved)")
+
+		// Jan 15 base occurrence
+		expect(base.length).toBeGreaterThanOrEqual(1)
+
+		// Jan 22 exception replaces the base occurrence
+		expect(exception).toBeDefined()
+		expect(exception!.data.startDate).toEqual(new Date("2026-01-22T10:00:00Z"))
+		expect(exception!.data.endDate).toEqual(new Date("2026-01-22T10:30:00Z"))
+	})
+
+	test("caches events within the same refresh cycle", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const context = createContext(new Date("2026-01-15T12:00:00Z"))
+
+		await source.fetchContext(context)
+		await source.fetchItems(context)
+
+		// Same context.time reference — fetchEvents should only hit the client once
+		expect(client.fetchCalendarsCallCount).toBe(1)
+	})
+
+	test("uses timezone for time range when provided", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+
+		// 2026-01-15T22:00:00Z = 2026-01-16T09:00:00 in Australia/Sydney (AEDT, UTC+11)
+		const source = new CalDavSource({
+			serverUrl: "https://caldav.example.com",
+			authMethod: "basic",
+			username: "user",
+			password: "pass",
+			davClient: client,
+			timeZone: "Australia/Sydney",
+		})
+
+		await source.fetchItems(createContext(new Date("2026-01-15T22:00:00Z")))
+
+		// "Today" in Sydney is Jan 16, so start should be Jan 15 13:00 UTC (midnight Jan 16 AEDT)
+		expect(client.lastTimeRange).not.toBeNull()
+		expect(client.lastTimeRange!.start).toBe("2026-01-15T13:00:00.000Z")
+		// End should be Jan 16 13:00 UTC (midnight Jan 17 AEDT) — 1 day window
+		expect(client.lastTimeRange!.end).toBe("2026-01-16T13:00:00.000Z")
+	})
+
+	test("defaults to UTC midnight when no timezone provided", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		await source.fetchItems(createContext(new Date("2026-01-15T22:00:00Z")))
+
+		expect(client.lastTimeRange).not.toBeNull()
+		expect(client.lastTimeRange!.start).toBe("2026-01-15T00:00:00.000Z")
+		expect(client.lastTimeRange!.end).toBe("2026-01-16T00:00:00.000Z")
+	})
+
+	test("refetches events for a different context time", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		await source.fetchItems(createContext(new Date("2026-01-15T12:00:00Z")))
+		await source.fetchItems(createContext(new Date("2026-01-15T13:00:00Z")))
+
+		// Different context.time references — should fetch twice
+		expect(client.fetchCalendarsCallCount).toBe(2)
+	})
+})
+
+describe("CalDavSource.fetchContext", () => {
+	test("returns empty context when no calendars exist", async () => {
+		const client = new MockDAVClient([], {})
+		const source = createSource(client)
+		const entries = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
+		const calendar = extractCalendar(entries)
+
+		expect(calendar).toBeDefined()
+		expect(calendar!.inProgress).toEqual([])
+		expect(calendar!.nextEvent).toBeNull()
+		expect(calendar!.hasTodayEvents).toBe(false)
+		expect(calendar!.todayEventCount).toBe(0)
+	})
+
+	test("identifies in-progress events", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		// 14:30 is during the 14:00-15:00 event
+		const entries = await source.fetchContext(createContext(new Date("2026-01-15T14:30:00Z")))
+		const calendar = extractCalendar(entries)
+
+		expect(calendar!.inProgress).toHaveLength(1)
+		expect(calendar!.inProgress[0]!.title).toBe("Team Standup")
+	})
+
+	test("identifies next upcoming event", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		// 12:00 is before the 14:00 event
+		const entries = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
+		const calendar = extractCalendar(entries)
+
+		expect(calendar!.inProgress).toHaveLength(0)
+		expect(calendar!.nextEvent).not.toBeNull()
+		expect(calendar!.nextEvent!.title).toBe("Team Standup")
+	})
+
+	test("excludes all-day events from inProgress and nextEvent", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") }],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const entries = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
+		const calendar = extractCalendar(entries)
+
+		expect(calendar!.inProgress).toHaveLength(0)
+		expect(calendar!.nextEvent).toBeNull()
+		expect(calendar!.hasTodayEvents).toBe(true)
+		expect(calendar!.todayEventCount).toBe(1)
+	})
+
+	test("counts all events including all-day in todayEventCount", async () => {
+		const objects: Record<string, CalDavDAVObject[]> = {
+			"/cal/work": [
+				{ url: "/cal/work/event1.ics", data: loadFixture("single-event.ics") },
+				{ url: "/cal/work/allday.ics", data: loadFixture("all-day-event.ics") },
+			],
+		}
+		const client = new MockDAVClient([{ url: "/cal/work", displayName: "Work" }], objects)
+		const source = createSource(client)
+
+		const entries = await source.fetchContext(createContext(new Date("2026-01-15T12:00:00Z")))
+		const calendar = extractCalendar(entries)
+
+		expect(calendar!.todayEventCount).toBe(2)
+		expect(calendar!.hasTodayEvents).toBe(true)
+	})
+})
+
+describe("computeSignals", () => {
+	const now = new Date("2026-01-15T12:00:00Z")
+
+	function makeEvent(overrides: Partial<CalDavEventData>): CalDavEventData {
+		return {
+			uid: "test-uid",
+			title: "Test",
+			startDate: new Date("2026-01-15T14:00:00Z"),
+			endDate: new Date("2026-01-15T15:00:00Z"),
+			isAllDay: false,
+			location: null,
+			description: null,
+			calendarName: null,
+			status: null,
+			url: null,
+			organizer: null,
+			attendees: [],
+			alarms: [],
+			recurrenceId: null,
+			...overrides,
+		}
+	}
+
+	test("all-day events get urgency 0.3 and ambient relevance", () => {
+		const event = makeEvent({ isAllDay: true })
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.3)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Ambient)
+	})
+
+	test("events starting within 30 minutes get urgency 0.9 and imminent relevance", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T12:20:00Z"),
+		})
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.9)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Imminent)
+	})
+
+	test("events starting exactly at 30 minutes get urgency 0.9", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T12:30:00Z"),
+		})
+		expect(computeSignals(event, now).urgency).toBe(0.9)
+	})
+
+	test("events starting within 2 hours get urgency 0.7 and upcoming relevance", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T13:00:00Z"),
+		})
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.7)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Upcoming)
+	})
+
+	test("events later today get urgency 0.5", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T20:00:00Z"),
+		})
+		expect(computeSignals(event, now).urgency).toBe(0.5)
+	})
+
+	test("in-progress events get urgency 0.8 and imminent relevance", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T11:00:00Z"),
+			endDate: new Date("2026-01-15T13:00:00Z"),
+		})
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.8)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Imminent)
+	})
+
+	test("fully past events get urgency 0.2 and ambient relevance", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T09:00:00Z"),
+			endDate: new Date("2026-01-15T10:00:00Z"),
+		})
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.2)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Ambient)
+	})
+
+	test("events on future days get urgency 0.2", () => {
+		const event = makeEvent({
+			startDate: new Date("2026-01-16T10:00:00Z"),
+		})
+		expect(computeSignals(event, now).urgency).toBe(0.2)
+	})
+
+	test("urgency boundaries are correct", () => {
+		// 31 minutes from now should be 0.7 (within 2 hours, not within 30 min)
+		const event31min = makeEvent({
+			startDate: new Date("2026-01-15T12:31:00Z"),
+		})
+		expect(computeSignals(event31min, now).urgency).toBe(0.7)
+
+		// 2 hours 1 minute from now should be 0.5 (later today, not within 2 hours)
+		const event2h1m = makeEvent({
+			startDate: new Date("2026-01-15T14:01:00Z"),
+		})
+		expect(computeSignals(event2h1m, now).urgency).toBe(0.5)
+	})
+
+	test("cancelled events get urgency 0.1 regardless of timing", () => {
+		const event = makeEvent({
+			status: "cancelled",
+			startDate: new Date("2026-01-15T12:20:00Z"), // would be 0.9 if not cancelled
+		})
+		const signals = computeSignals(event, now)
+		expect(signals.urgency).toBe(0.1)
+		expect(signals.timeRelevance).toBe(TimeRelevance.Ambient)
+	})
+
+	test("uses timezone for 'later today' boundary", () => {
+		// now = 2026-01-15T12:00:00Z = 2026-01-15T21:00:00 JST (UTC+9)
+		// event at 2026-01-15T15:30:00Z = 2026-01-16T00:30:00 JST — next day in JST
+		const event = makeEvent({
+			startDate: new Date("2026-01-15T15:30:00Z"),
+		})
+
+		// Without timezone: UTC day ends at 2026-01-16T00:00:00Z, event is before that → "later today"
+		expect(computeSignals(event, now).urgency).toBe(0.5)
+
+		// With Asia/Tokyo: local day ends at 2026-01-15T15:00:00Z (midnight Jan 16 JST),
+		// event is after that → "future days"
+		expect(computeSignals(event, now, "Asia/Tokyo").urgency).toBe(0.2)
+	})
+})
+
+

packages/aris-source-caldav/src/caldav-source.ts

@@ -0,0 +1,351 @@
+import type { ActionDefinition, ContextEntry, FeedItemSignals, FeedSource } from "@aris/core"
+
+import { Context, TimeRelevance, UnknownActionError } from "@aris/core"
+import { DAVClient } from "tsdav"
+
+import type { CalDavDAVClient, CalDavEventData, CalDavFeedItem } from "./types.ts"
+
+import { CalDavCalendarKey, type CalendarContext } from "./calendar-context.ts"
+import { parseICalEvents } from "./ical-parser.ts"
+import { CalDavEventStatus, CalDavFeedItemType } from "./types.ts"
+
+// -- Source options --
+
+interface CalDavSourceBaseOptions {
+	serverUrl: string
+	/** Number of additional days beyond today to fetch. Default: 0 (today only). */
+	lookAheadDays?: number
+	/** IANA timezone for determining "today" (e.g. "America/New_York"). Default: UTC. */
+	timeZone?: string
+	/** Optional DAV client for testing. */
+	davClient?: CalDavDAVClient
+}
+
+interface CalDavSourceBasicAuthOptions extends CalDavSourceBaseOptions {
+	authMethod: "basic"
+	username: string
+	password: string
+}
+
+interface CalDavSourceOAuthOptions extends CalDavSourceBaseOptions {
+	authMethod: "oauth"
+	accessToken: string
+	refreshToken: string
+	tokenUrl: string
+	expiration?: number
+	clientId?: string
+	clientSecret?: string
+}
+
+export type CalDavSourceOptions = CalDavSourceBasicAuthOptions | CalDavSourceOAuthOptions
+
+const DEFAULT_LOOK_AHEAD_DAYS = 0
+
+/**
+ * A FeedSource that fetches calendar events from any CalDAV server.
+ *
+ * Supports Basic auth (username/password) and OAuth (access token + refresh token).
+ * The server URL is provided at construction time.
+ *
+ * @example
+ * ```ts
+ * // Basic auth (self-hosted servers)
+ * const source = new CalDavSource({
+ *   serverUrl: "https://nextcloud.example.com/remote.php/dav",
+ *   authMethod: "basic",
+ *   username: "user",
+ *   password: "pass",
+ * })
+ *
+ * // OAuth (cloud providers)
+ * const source = new CalDavSource({
+ *   serverUrl: "https://caldav.provider.com",
+ *   authMethod: "oauth",
+ *   accessToken: "...",
+ *   refreshToken: "...",
+ *   tokenUrl: "https://provider.com/oauth/token",
+ * })
+ * ```
+ */
+export class CalDavSource implements FeedSource<CalDavFeedItem> {
+	readonly id = "aris.caldav"
+
+	private options: CalDavSourceOptions | null
+	private readonly lookAheadDays: number
+	private readonly timeZone: string | undefined
+	private readonly injectedClient: CalDavDAVClient | null
+	private clientPromise: Promise<CalDavDAVClient> | null = null
+	private cachedEvents: { time: Date; events: CalDavEventData[] } | null = null
+	private pendingFetch: { time: Date; promise: Promise<CalDavEventData[]> } | null = null
+
+	constructor(options: CalDavSourceOptions) {
+		this.options = options
+		this.lookAheadDays = options.lookAheadDays ?? DEFAULT_LOOK_AHEAD_DAYS
+		this.timeZone = options.timeZone
+		this.injectedClient = options.davClient ?? null
+	}
+
+	async listActions(): Promise<Record<string, ActionDefinition>> {
+		return {}
+	}
+
+	async executeAction(actionId: string): Promise<void> {
+		throw new UnknownActionError(actionId)
+	}
+
+	async fetchContext(context: Context): Promise<readonly ContextEntry[] | null> {
+		const events = await this.fetchEvents(context)
+		if (events.length === 0) {
+			return [
+				[
+					CalDavCalendarKey,
+					{
+						inProgress: [],
+						nextEvent: null,
+						hasTodayEvents: false,
+						todayEventCount: 0,
+					},
+				],
+			]
+		}
+
+		const now = context.time
+		const active = events.filter((e) => e.status !== CalDavEventStatus.Cancelled)
+		const inProgress = active.filter((e) => !e.isAllDay && e.startDate <= now && e.endDate > now)
+
+		const upcoming = active
+			.filter((e) => !e.isAllDay && e.startDate > now)
+			.sort((a, b) => a.startDate.getTime() - b.startDate.getTime())
+
+		const calendarContext: CalendarContext = {
+			inProgress,
+			nextEvent: upcoming[0] ?? null,
+			hasTodayEvents: events.length > 0,
+			todayEventCount: events.length,
+		}
+
+		return [[CalDavCalendarKey, calendarContext]]
+	}
+
+	async fetchItems(context: Context): Promise<CalDavFeedItem[]> {
+		const now = context.time
+		const events = await this.fetchEvents(context)
+		return events.map((event) => createFeedItem(event, now, this.timeZone))
+	}
+
+	private fetchEvents(context: Context): Promise<CalDavEventData[]> {
+		if (this.cachedEvents && this.cachedEvents.time === context.time) {
+			return Promise.resolve(this.cachedEvents.events)
+		}
+
+		// Deduplicate concurrent fetches for the same context.time reference
+		if (this.pendingFetch && this.pendingFetch.time === context.time) {
+			return this.pendingFetch.promise
+		}
+
+		const promise = this.doFetchEvents(context).finally(() => {
+			if (this.pendingFetch?.promise === promise) {
+				this.pendingFetch = null
+			}
+		})
+
+		this.pendingFetch = { time: context.time, promise }
+		return promise
+	}
+
+	private async doFetchEvents(context: Context): Promise<CalDavEventData[]> {
+		const client = await this.connectClient()
+		const calendars = await client.fetchCalendars()
+
+		const { start, end } = computeTimeRange(context.time, this.lookAheadDays, this.timeZone)
+
+		const results = await Promise.allSettled(
+			calendars.map(async (calendar) => {
+				const objects = await client.fetchCalendarObjects({
+					calendar,
+					timeRange: {
+						start: start.toISOString(),
+						end: end.toISOString(),
+					},
+				})
+				// tsdav types displayName as string | Record<string, unknown> | undefined
+				const calendarName = typeof calendar.displayName === "string" ? calendar.displayName : null
+				return { objects, calendarName }
+			}),
+		)
+
+		const allEvents: CalDavEventData[] = []
+		for (const result of results) {
+			if (result.status === "rejected") {
+				console.warn("[aris.caldav] Failed to fetch calendar:", result.reason)
+				continue
+			}
+			const { objects, calendarName } = result.value
+			for (const obj of objects) {
+				if (typeof obj.data !== "string") continue
+
+				const events = parseICalEvents(obj.data, calendarName, { start, end })
+				for (const event of events) {
+					allEvents.push(event)
+				}
+			}
+		}
+
+		this.cachedEvents = { time: context.time, events: allEvents }
+		return allEvents
+	}
+
+	private connectClient(): Promise<CalDavDAVClient> {
+		if (this.injectedClient) {
+			return Promise.resolve(this.injectedClient)
+		}
+
+		if (!this.clientPromise) {
+			this.clientPromise = this.createAndLoginClient().catch((err) => {
+				this.clientPromise = null
+				throw err
+			})
+		}
+
+		return this.clientPromise
+	}
+
+	private async createAndLoginClient(): Promise<CalDavDAVClient> {
+		const opts = this.options
+		if (!opts) {
+			throw new Error("CalDavSource options have already been consumed")
+		}
+
+		let client: CalDavDAVClient
+
+		if (opts.authMethod === "basic") {
+			client = new DAVClient({
+				serverUrl: opts.serverUrl,
+				credentials: {
+					username: opts.username,
+					password: opts.password,
+				},
+				authMethod: "Basic",
+				defaultAccountType: "caldav",
+			})
+		} else {
+			client = new DAVClient({
+				serverUrl: opts.serverUrl,
+				credentials: {
+					tokenUrl: opts.tokenUrl,
+					refreshToken: opts.refreshToken,
+					accessToken: opts.accessToken,
+					expiration: opts.expiration,
+					clientId: opts.clientId,
+					clientSecret: opts.clientSecret,
+				},
+				authMethod: "Oauth",
+				defaultAccountType: "caldav",
+			})
+		}
+
+		await client.login()
+		this.options = null
+		return client
+	}
+}
+
+function computeTimeRange(
+	now: Date,
+	lookAheadDays: number,
+	timeZone?: string,
+): { start: Date; end: Date } {
+	const start = startOfDay(now, timeZone)
+	const end = new Date(start.getTime() + (1 + lookAheadDays) * 24 * 60 * 60 * 1000)
+	return { start, end }
+}
+
+/**
+ * Returns midnight (start of day) as a UTC Date.
+ * When timeZone is provided, "midnight" is local midnight in that timezone
+ * converted to UTC. Otherwise, UTC midnight.
+ */
+function startOfDay(date: Date, timeZone?: string): Date {
+	if (!timeZone) {
+		const d = new Date(date)
+		d.setUTCHours(0, 0, 0, 0)
+		return d
+	}
+
+	// Extract the local year/month/day in the target timezone
+	const parts = new Intl.DateTimeFormat("en-CA", {
+		timeZone,
+		year: "numeric",
+		month: "2-digit",
+		day: "2-digit",
+	}).formatToParts(date)
+
+	const year = Number(parts.find((p) => p.type === "year")!.value)
+	const month = Number(parts.find((p) => p.type === "month")!.value)
+	const day = Number(parts.find((p) => p.type === "day")!.value)
+
+	// Binary-search-free approach: construct a UTC date at the local date's noon,
+	// then use the timezone offset at that moment to find local midnight in UTC.
+	const noonUtc = Date.UTC(year, month - 1, day, 12, 0, 0)
+	const noonLocal = new Date(noonUtc).toLocaleString("sv-SE", { timeZone, hour12: false })
+	// sv-SE locale formats as "YYYY-MM-DD HH:MM:SS" which Date can parse
+	const noonLocalMs = new Date(noonLocal + "Z").getTime()
+	const offsetMs = noonLocalMs - noonUtc
+
+	return new Date(Date.UTC(year, month - 1, day) - offsetMs)
+}
+
+export function computeSignals(
+	event: CalDavEventData,
+	now: Date,
+	timeZone?: string,
+): FeedItemSignals {
+	if (event.status === CalDavEventStatus.Cancelled) {
+		return { urgency: 0.1, timeRelevance: TimeRelevance.Ambient }
+	}
+
+	if (event.isAllDay) {
+		return { urgency: 0.3, timeRelevance: TimeRelevance.Ambient }
+	}
+
+	const msUntilStart = event.startDate.getTime() - now.getTime()
+
+	// Event already started
+	if (msUntilStart < 0) {
+		const isInProgress = now.getTime() < event.endDate.getTime()
+		return isInProgress
+			? { urgency: 0.8, timeRelevance: TimeRelevance.Imminent }
+			: { urgency: 0.2, timeRelevance: TimeRelevance.Ambient }
+	}
+
+	// Starting within 30 minutes
+	if (msUntilStart <= 30 * 60 * 1000) {
+		return { urgency: 0.9, timeRelevance: TimeRelevance.Imminent }
+	}
+
+	// Starting within 2 hours
+	if (msUntilStart <= 2 * 60 * 60 * 1000) {
+		return { urgency: 0.7, timeRelevance: TimeRelevance.Upcoming }
+	}
+
+	// Later today (using local day boundary when timeZone is set)
+	const todayStart = startOfDay(now, timeZone)
+	const endOfDay = new Date(todayStart.getTime() + 24 * 60 * 60 * 1000)
+
+	if (event.startDate.getTime() < endOfDay.getTime()) {
+		return { urgency: 0.5, timeRelevance: TimeRelevance.Upcoming }
+	}
+
+	// Future days
+	return { urgency: 0.2, timeRelevance: TimeRelevance.Ambient }
+}
+
+function createFeedItem(event: CalDavEventData, now: Date, timeZone?: string): CalDavFeedItem {
+	return {
+		id: `caldav-event-${event.uid}${event.recurrenceId ? `-${event.recurrenceId}` : ""}`,
+		type: CalDavFeedItemType.Event,
+		timestamp: now,
+		data: event,
+		signals: computeSignals(event, now, timeZone),
+	}
+}

packages/aris-source-caldav/src/calendar-context.ts

@@ -2,23 +2,23 @@ import type { ContextKey } from "@aris/core"
 
 import { contextKey } from "@aris/core"
 
-import type { CalendarEventData } from "./types.ts"
+import type { CalDavEventData } from "./types.ts"
 
 /**
  * Calendar context for downstream sources.
  *
- * Provides a snapshot of the user's upcoming events so other sources
+ * Provides a snapshot of the user's upcoming CalDAV events so other sources
  * can adapt (e.g. a commute source checking if there's a meeting soon).
  */
 export interface CalendarContext {
 	/** Events happening right now */
-	inProgress: CalendarEventData[]
+	inProgress: CalDavEventData[]
 	/** Next upcoming event, if any */
-	nextEvent: CalendarEventData | null
+	nextEvent: CalDavEventData | null
 	/** Whether the user has any events today */
 	hasTodayEvents: boolean
 	/** Total number of events today */
 	todayEventCount: number
 }
 
-export const CalendarKey: ContextKey<CalendarContext> = contextKey("calendar")
+export const CalDavCalendarKey: ContextKey<CalendarContext> = contextKey("aris.caldav", "calendar")

packages/aris-source-caldav/src/ical-parser.test.ts

@@ -0,0 +1,198 @@
+import { describe, expect, test } from "bun:test"
+import { readFileSync } from "node:fs"
+import { join } from "node:path"
+
+import { parseICalEvents } from "./ical-parser.ts"
+
+function loadFixture(name: string): string {
+	return readFileSync(join(import.meta.dir, "..", "fixtures", name), "utf-8")
+}
+
+describe("parseICalEvents", () => {
+	test("parses a full event with all fields", () => {
+		const events = parseICalEvents(loadFixture("single-event.ics"), "Work")
+
+		expect(events).toHaveLength(1)
+		const event = events[0]!
+
+		expect(event.uid).toBe("single-event-001@test")
+		expect(event.title).toBe("Team Standup")
+		expect(event.startDate).toEqual(new Date("2026-01-15T14:00:00Z"))
+		expect(event.endDate).toEqual(new Date("2026-01-15T15:00:00Z"))
+		expect(event.isAllDay).toBe(false)
+		expect(event.location).toBe("Conference Room A")
+		expect(event.description).toBe("Daily standup meeting")
+		expect(event.calendarName).toBe("Work")
+		expect(event.status).toBe("confirmed")
+		expect(event.url).toBe("https://example.com/meeting/123")
+		expect(event.organizer).toBe("Alice Smith")
+		expect(event.recurrenceId).toBeNull()
+
+		expect(event.attendees).toHaveLength(2)
+		expect(event.attendees[0]).toEqual({
+			name: "Bob Jones",
+			email: "bob@example.com",
+			role: "required",
+			status: "accepted",
+		})
+		expect(event.attendees[1]).toEqual({
+			name: "Carol White",
+			email: "carol@example.com",
+			role: "optional",
+			status: "tentative",
+		})
+
+		expect(event.alarms).toHaveLength(2)
+		expect(event.alarms[0]).toEqual({ trigger: "-PT15M", action: "DISPLAY" })
+		expect(event.alarms[1]).toEqual({ trigger: "-PT5M", action: "AUDIO" })
+	})
+
+	test("parses an all-day event with optional fields as null", () => {
+		const events = parseICalEvents(loadFixture("all-day-event.ics"), null)
+
+		expect(events).toHaveLength(1)
+		const event = events[0]!
+
+		expect(event.isAllDay).toBe(true)
+		expect(event.title).toBe("Company Holiday")
+		expect(event.calendarName).toBeNull()
+		expect(event.location).toBeNull()
+		expect(event.description).toBeNull()
+		expect(event.url).toBeNull()
+		expect(event.organizer).toBeNull()
+		expect(event.attendees).toEqual([])
+		expect(event.alarms).toEqual([])
+	})
+
+	test("parses recurring event with exception", () => {
+		const events = parseICalEvents(loadFixture("recurring-event.ics"), "Team")
+
+		expect(events).toHaveLength(2)
+		expect(events[0]!.uid).toBe("recurring-001@test")
+		expect(events[1]!.uid).toBe("recurring-001@test")
+
+		const base = events.find((e) => e.title === "Weekly Sync")
+		expect(base).toBeDefined()
+		expect(base!.recurrenceId).toBeNull()
+
+		const exception = events.find((e) => e.title === "Weekly Sync (moved)")
+		expect(exception).toBeDefined()
+		expect(exception!.recurrenceId).not.toBeNull()
+	})
+
+	test("parses minimal event with defaults", () => {
+		const events = parseICalEvents(loadFixture("minimal-event.ics"), null)
+
+		expect(events).toHaveLength(1)
+		const event = events[0]!
+
+		expect(event.uid).toBe("minimal-001@test")
+		expect(event.title).toBe("Quick Chat")
+		expect(event.startDate).toEqual(new Date("2026-01-15T18:00:00Z"))
+		expect(event.endDate).toEqual(new Date("2026-01-15T19:00:00Z"))
+		expect(event.location).toBeNull()
+		expect(event.description).toBeNull()
+		expect(event.status).toBeNull()
+		expect(event.url).toBeNull()
+		expect(event.organizer).toBeNull()
+		expect(event.attendees).toEqual([])
+		expect(event.alarms).toEqual([])
+		expect(event.recurrenceId).toBeNull()
+	})
+
+	test("parses cancelled status", () => {
+		const events = parseICalEvents(loadFixture("cancelled-event.ics"), null)
+		expect(events[0]!.status).toBe("cancelled")
+	})
+})
+
+describe("parseICalEvents with timeRange (recurrence expansion)", () => {
+	test("expands weekly recurring event into occurrences within range", () => {
+		// weekly-recurring.ics: DTSTART 2026-01-01 (Thu), FREQ=WEEKLY;BYDAY=TH;COUNT=10
+		// Occurrences: Jan 1, 8, 15, 22, 29, Feb 5, 12, 19, 26, Mar 5
+		// Query window: Jan 14 – Jan 23 → should get Jan 15 and Jan 22
+		const events = parseICalEvents(loadFixture("weekly-recurring.ics"), "Work", {
+			start: new Date("2026-01-14T00:00:00Z"),
+			end: new Date("2026-01-23T00:00:00Z"),
+		})
+
+		expect(events).toHaveLength(2)
+		expect(events[0]!.startDate).toEqual(new Date("2026-01-15T10:00:00Z"))
+		expect(events[0]!.endDate).toEqual(new Date("2026-01-15T11:00:00Z"))
+		expect(events[1]!.startDate).toEqual(new Date("2026-01-22T10:00:00Z"))
+		expect(events[1]!.endDate).toEqual(new Date("2026-01-22T11:00:00Z"))
+
+		// All occurrences share the same UID and metadata
+		for (const event of events) {
+			expect(event.uid).toBe("weekly-001@test")
+			expect(event.title).toBe("Weekly Team Meeting")
+			expect(event.location).toBe("Room B")
+			expect(event.calendarName).toBe("Work")
+		}
+	})
+
+	test("returns empty array when no occurrences fall in range", () => {
+		// Query window: Dec 2025 — before the first occurrence
+		const events = parseICalEvents(loadFixture("weekly-recurring.ics"), null, {
+			start: new Date("2025-12-01T00:00:00Z"),
+			end: new Date("2025-12-31T00:00:00Z"),
+		})
+
+		expect(events).toHaveLength(0)
+	})
+
+	test("applies exception overrides during expansion", () => {
+		// weekly-recurring-with-exception.ics:
+		//   Master: DTSTART 2026-01-01 (Thu) 14:00, FREQ=WEEKLY;BYDAY=TH;COUNT=8
+		//   Exception: RECURRENCE-ID 2026-01-15T14:00 → moved to 16:00-17:00, title changed
+		// Query window: Jan 14 – Jan 16 → should get the exception occurrence for Jan 15
+		const events = parseICalEvents(loadFixture("weekly-recurring-with-exception.ics"), "Work", {
+			start: new Date("2026-01-14T00:00:00Z"),
+			end: new Date("2026-01-16T00:00:00Z"),
+		})
+
+		expect(events).toHaveLength(1)
+		expect(events[0]!.title).toBe("Standup (rescheduled)")
+		expect(events[0]!.startDate).toEqual(new Date("2026-01-15T16:00:00Z"))
+		expect(events[0]!.endDate).toEqual(new Date("2026-01-15T17:00:00Z"))
+	})
+
+	test("expands recurring all-day events", () => {
+		// daily-recurring-allday.ics: DTSTART 2026-01-12, FREQ=DAILY;COUNT=7
+		// Occurrences: Jan 12, 13, 14, 15, 16, 17, 18
+		// Query window: Jan 14 – Jan 17 → should get Jan 14, 15, 16
+		const events = parseICalEvents(loadFixture("daily-recurring-allday.ics"), null, {
+			start: new Date("2026-01-14T00:00:00Z"),
+			end: new Date("2026-01-17T00:00:00Z"),
+		})
+
+		expect(events).toHaveLength(3)
+		for (const event of events) {
+			expect(event.isAllDay).toBe(true)
+			expect(event.title).toBe("Daily Reminder")
+		}
+	})
+
+	test("non-recurring events are filtered by range", () => {
+		// single-event.ics: 2026-01-15T14:00 – 15:00
+		// Query window that includes it
+		const included = parseICalEvents(loadFixture("single-event.ics"), null, {
+			start: new Date("2026-01-15T00:00:00Z"),
+			end: new Date("2026-01-16T00:00:00Z"),
+		})
+		expect(included).toHaveLength(1)
+
+		// Query window that excludes it
+		const excluded = parseICalEvents(loadFixture("single-event.ics"), null, {
+			start: new Date("2026-01-16T00:00:00Z"),
+			end: new Date("2026-01-17T00:00:00Z"),
+		})
+		expect(excluded).toHaveLength(0)
+	})
+
+	test("without timeRange, recurring events return raw VEVENTs (legacy)", () => {
+		// Legacy behavior: no expansion, just returns the VEVENT components as-is
+		const events = parseICalEvents(loadFixture("recurring-event.ics"), "Team")
+		expect(events).toHaveLength(2)
+	})
+})

packages/aris-source-caldav/src/ical-parser.ts

@@ -0,0 +1,323 @@
+import ICAL from "ical.js"
+
+import {
+	AttendeeRole,
+	AttendeeStatus,
+	CalDavEventStatus,
+	type CalDavAlarm,
+	type CalDavAttendee,
+	type CalDavEventData,
+} from "./types.ts"
+
+export interface ICalTimeRange {
+	start: Date
+	end: Date
+}
+
+/**
+ * Safety cap to prevent runaway iteration on pathological recurrence rules.
+ * Each iteration is pure date math (no I/O), so a high cap is fine.
+ * 10,000 covers a daily event with DTSTART ~27 years in the past.
+ */
+const MAX_RECURRENCE_ITERATIONS = 10_000
+
+/**
+ * Parses a raw iCalendar string and extracts VEVENT components
+ * into CalDavEventData objects.
+ *
+ * When a timeRange is provided, recurring events are expanded into
+ * individual occurrences within that range. Without a timeRange,
+ * each VEVENT component is returned as-is (legacy behavior).
+ *
+ * @param icsData - Raw iCalendar string from a CalDAV response
+ * @param calendarName - Display name of the calendar this event belongs to
+ * @param timeRange - When set, expand recurrences and filter to this window
+ */
+export function parseICalEvents(
+	icsData: string,
+	calendarName: string | null,
+	timeRange?: ICalTimeRange,
+): CalDavEventData[] {
+	const jcal = ICAL.parse(icsData)
+	const comp = new ICAL.Component(jcal)
+	const vevents = comp.getAllSubcomponents("vevent")
+
+	if (!timeRange) {
+		return vevents.map((vevent: InstanceType<typeof ICAL.Component>) =>
+			parseVEvent(vevent, calendarName),
+		)
+	}
+
+	// Group VEVENTs by UID: master + exceptions
+	const byUid = new Map<
+		string,
+		{
+			master: InstanceType<typeof ICAL.Component> | null
+			exceptions: InstanceType<typeof ICAL.Component>[]
+		}
+	>()
+
+	for (const vevent of vevents as InstanceType<typeof ICAL.Component>[]) {
+		const uid = vevent.getFirstPropertyValue("uid") as string | null
+		if (!uid) continue
+
+		const hasRecurrenceId = vevent.getFirstPropertyValue("recurrence-id") !== null
+		let group = byUid.get(uid)
+		if (!group) {
+			group = { master: null, exceptions: [] }
+			byUid.set(uid, group)
+		}
+
+		if (hasRecurrenceId) {
+			group.exceptions.push(vevent)
+		} else {
+			group.master = vevent
+		}
+	}
+
+	const results: CalDavEventData[] = []
+	const rangeStart = ICAL.Time.fromJSDate(timeRange.start, true)
+	const rangeEnd = ICAL.Time.fromJSDate(timeRange.end, true)
+
+	for (const group of byUid.values()) {
+		if (!group.master) {
+			// Orphan exceptions — parse them directly if they fall in range
+			for (const exc of group.exceptions) {
+				const parsed = parseVEvent(exc, calendarName)
+				if (overlapsRange(parsed, timeRange)) {
+					results.push(parsed)
+				}
+			}
+			continue
+		}
+
+		const masterEvent = new ICAL.Event(group.master)
+
+		// Register exceptions so getOccurrenceDetails resolves them
+		for (const exc of group.exceptions) {
+			masterEvent.relateException(exc)
+		}
+
+		if (!masterEvent.isRecurring()) {
+			const parsed = parseVEvent(group.master, calendarName)
+			if (overlapsRange(parsed, timeRange)) {
+				results.push(parsed)
+			}
+			// Also include standalone exceptions for non-recurring events
+			for (const exc of group.exceptions) {
+				const parsedExc = parseVEvent(exc, calendarName)
+				if (overlapsRange(parsedExc, timeRange)) {
+					results.push(parsedExc)
+				}
+			}
+			continue
+		}
+
+		// Expand recurring event occurrences within the time range.
+		// The iterator must start from DTSTART (not rangeStart) because
+		// ical.js needs to walk the recurrence rule grid from the original
+		// anchor. We cap iterations to avoid runaway expansion on
+		// pathological rules.
+		const iter = masterEvent.iterator()
+		let next: InstanceType<typeof ICAL.Time> | null = iter.next()
+		let iterations = 0
+
+		while (next) {
+			if (++iterations > MAX_RECURRENCE_ITERATIONS) {
+				console.warn(
+					`[aris.caldav] Recurrence expansion for "${masterEvent.uid}" hit iteration limit (${MAX_RECURRENCE_ITERATIONS}), stopping`,
+				)
+				break
+			}
+
+			// Stop once we're past the range end
+			if (next.compare(rangeEnd) >= 0) break
+
+			const details = masterEvent.getOccurrenceDetails(next)
+			const occEnd = details.endDate
+
+			// Skip occurrences that end before the range starts
+			if (occEnd.compare(rangeStart) <= 0) {
+				next = iter.next()
+				continue
+			}
+
+			const occEvent = details.item
+			const occComponent = occEvent.component
+
+			const parsed = parseVEventWithDates(
+				occComponent,
+				calendarName,
+				details.startDate.toJSDate(),
+				details.endDate.toJSDate(),
+				details.recurrenceId ? details.recurrenceId.toString() : null,
+			)
+			results.push(parsed)
+
+			next = iter.next()
+		}
+	}
+
+	return results
+}
+
+function overlapsRange(event: CalDavEventData, range: ICalTimeRange): boolean {
+	return event.startDate < range.end && event.endDate > range.start
+}
+
+/**
+ * Parse a VEVENT component, overriding start/end/recurrenceId with
+ * values from recurrence expansion.
+ */
+function parseVEventWithDates(
+	vevent: InstanceType<typeof ICAL.Component>,
+	calendarName: string | null,
+	startDate: Date,
+	endDate: Date,
+	recurrenceId: string | null,
+): CalDavEventData {
+	const event = new ICAL.Event(vevent)
+
+	return {
+		uid: event.uid ?? "",
+		title: event.summary ?? "",
+		startDate,
+		endDate,
+		isAllDay: event.startDate?.isDate ?? false,
+		location: event.location ?? null,
+		description: event.description ?? null,
+		calendarName,
+		status: parseStatus(asStringOrNull(vevent.getFirstPropertyValue("status"))),
+		url: asStringOrNull(vevent.getFirstPropertyValue("url")),
+		organizer: parseOrganizer(asStringOrNull(event.organizer), vevent),
+		attendees: parseAttendees(Array.isArray(event.attendees) ? event.attendees : []),
+		alarms: parseAlarms(vevent),
+		recurrenceId,
+	}
+}
+
+function parseVEvent(
+	vevent: InstanceType<typeof ICAL.Component>,
+	calendarName: string | null,
+): CalDavEventData {
+	const event = new ICAL.Event(vevent)
+
+	return {
+		uid: event.uid ?? "",
+		title: event.summary ?? "",
+		startDate: event.startDate?.toJSDate() ?? new Date(0),
+		endDate: event.endDate?.toJSDate() ?? new Date(0),
+		isAllDay: event.startDate?.isDate ?? false,
+		location: event.location ?? null,
+		description: event.description ?? null,
+		calendarName,
+		status: parseStatus(asStringOrNull(vevent.getFirstPropertyValue("status"))),
+		url: asStringOrNull(vevent.getFirstPropertyValue("url")),
+		organizer: parseOrganizer(asStringOrNull(event.organizer), vevent),
+		attendees: parseAttendees(Array.isArray(event.attendees) ? event.attendees : []),
+		alarms: parseAlarms(vevent),
+		recurrenceId: event.recurrenceId ? event.recurrenceId.toString() : null,
+	}
+}
+
+function parseStatus(raw: string | null): CalDavEventStatus | null {
+	if (!raw) return null
+	switch (raw.toLowerCase()) {
+		case "confirmed":
+			return CalDavEventStatus.Confirmed
+		case "tentative":
+			return CalDavEventStatus.Tentative
+		case "cancelled":
+			return CalDavEventStatus.Cancelled
+		default:
+			return null
+	}
+}
+
+function parseOrganizer(
+	value: string | null,
+	vevent: InstanceType<typeof ICAL.Component>,
+): string | null {
+	if (!value) return null
+
+	// Try CN parameter first
+	const prop = vevent.getFirstProperty("organizer")
+	if (prop) {
+		const cn = prop.getParameter("cn") as string | undefined
+		if (cn) return cn
+	}
+
+	// Fall back to mailto: value
+	return value.replace(/^mailto:/i, "")
+}
+
+function parseAttendees(properties: unknown[]): CalDavAttendee[] {
+	if (properties.length === 0) return []
+
+	return properties.flatMap((prop) => {
+		if (!prop || typeof prop !== "object" || !("getFirstValue" in prop)) return []
+		const p = prop as InstanceType<typeof ICAL.Property>
+		const value = asStringOrNull(p.getFirstValue())
+		const cn = asStringOrNull(p.getParameter("cn"))
+		const role = asStringOrNull(p.getParameter("role"))
+		const partstat = asStringOrNull(p.getParameter("partstat"))
+
+		return [
+			{
+				name: cn,
+				email: value ? value.replace(/^mailto:/i, "") : null,
+				role: parseAttendeeRole(role),
+				status: parseAttendeeStatus(partstat),
+			},
+		]
+	})
+}
+
+function parseAttendeeRole(raw: string | null): AttendeeRole | null {
+	if (!raw) return null
+	switch (raw.toUpperCase()) {
+		case "CHAIR":
+			return AttendeeRole.Chair
+		case "REQ-PARTICIPANT":
+			return AttendeeRole.Required
+		case "OPT-PARTICIPANT":
+			return AttendeeRole.Optional
+		default:
+			return null
+	}
+}
+
+function parseAttendeeStatus(raw: string | null): AttendeeStatus | null {
+	if (!raw) return null
+	switch (raw.toUpperCase()) {
+		case "ACCEPTED":
+			return AttendeeStatus.Accepted
+		case "DECLINED":
+			return AttendeeStatus.Declined
+		case "TENTATIVE":
+			return AttendeeStatus.Tentative
+		case "NEEDS-ACTION":
+			return AttendeeStatus.NeedsAction
+		default:
+			return null
+	}
+}
+
+function parseAlarms(vevent: InstanceType<typeof ICAL.Component>): CalDavAlarm[] {
+	const valarms = vevent.getAllSubcomponents("valarm")
+	if (!valarms || valarms.length === 0) return []
+
+	return valarms.map((valarm: InstanceType<typeof ICAL.Component>) => {
+		const trigger = valarm.getFirstPropertyValue("trigger")
+		const action = asStringOrNull(valarm.getFirstPropertyValue("action"))
+
+		return {
+			trigger: trigger ? trigger.toString() : "",
+			action: action ?? "DISPLAY",
+		}
+	})
+}
+
+function asStringOrNull(value: unknown): string | null {
+	return typeof value === "string" ? value : null
+}

packages/aris-source-caldav/src/index.ts

@@ -0,0 +1,16 @@
+export { CalDavCalendarKey, type CalendarContext } from "./calendar-context.ts"
+export { CalDavSource, type CalDavSourceOptions } from "./caldav-source.ts"
+export { parseICalEvents, type ICalTimeRange } from "./ical-parser.ts"
+export {
+	AttendeeRole,
+	AttendeeStatus,
+	CalDavEventStatus,
+	CalDavFeedItemType,
+	type CalDavAlarm,
+	type CalDavAttendee,
+	type CalDavDAVCalendar,
+	type CalDavDAVClient,
+	type CalDavDAVObject,
+	type CalDavEventData,
+	type CalDavFeedItem,
+} from "./types.ts"