feat: add agent websocket endpoint (#142)

packages/freya-agent-protocol/src/index.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, test } from "bun:test"
+
+import type { AgentEvent, AgentServerApi } from "./index"
+
+describe("agent protocol", () => {
+	test("defines server methods and agent events", () => {
+		const server: AgentServerApi = {
+			async sendMessage(message) {
+				return { message, conversationId: "conversation-1" }
+			},
+			ping() {
+				return "pong"
+			},
+		}
+		const event: AgentEvent = { type: "message_finished" }
+
+		expect(server.ping()).toBe("pong")
+		expect(event.type).toBe("message_finished")
+	})
+})

packages/freya-agent-protocol/src/index.ts

@@ -0,0 +1,21 @@
+export interface SendMessageResult {
+	message: string
+	conversationId: string
+}
+
+export type AgentEvent =
+	| { type: "conversation_started"; conversationId: string }
+	| { type: "message_created"; text: string }
+	| { type: "tool_started"; toolName: string }
+	| { type: "tool_finished"; toolName: string; ok: boolean }
+	| { type: "message_finished" }
+	| { type: "message_failed"; error: string }
+
+export interface AgentServerApi {
+	sendMessage(message: string): Promise<SendMessageResult>
+	ping(): "pong"
+}
+
+export interface AgentClientApi {
+	notify(event: AgentEvent): void
+}