Context keys are now tuples instead of strings, inspired by
React Query's query keys. This prevents context collisions
when multiple instances of the same source type are registered.
Sources write to structured keys like
["aris.google-calendar", "nextEvent", { account: "work" }]
and consumers can query by prefix via context.find().
Co-authored-by: Ona <no-reply@ona.com>
* feat: replace FeedItem.priority with signals
Remove priority field from FeedItem and engine-level sorting.
Add FeedItemSignals with urgency and timeRelevance fields.
Update all source packages to emit signals instead of priority.
Ranking is now the post-processing layer's responsibility.
Urgency values are unchanged from the old priority values.
Co-authored-by: Ona <no-reply@ona.com>
* fix: use TimeRelevance enum in all tests
Co-authored-by: Ona <no-reply@ona.com>
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Co-authored-by: Ona <no-reply@ona.com>
Add lastFeed() method that returns cached FeedResult within
a configurable TTL (default 5 min). refresh() always fetches
fresh data and updates the cache. Periodic auto-refresh via
recursive setTimeout when engine is started. Reactive updates
reset the timer to avoid redundant fetches.
Co-authored-by: Ona <no-reply@ona.com>
Add listActions() and executeAction() to FeedSource for write
operations back to external services. Actions use arktype schemas
for input validation via StandardSchemaV1.
- ActionDefinition type with optional input schema
- FeedEngine routes actions with existence and ID validation
- Source IDs use reverse-domain format (aris.location, aris.tfl)
- LocationSource: update-location action with schema validation
- TflSource: set-lines-of-interest action with lineId validation
- No-op implementations for sources without actions
Co-authored-by: Ona <no-reply@ona.com>
Sources that cannot provide context now return null
instead of omitting the method. The engine checks the
return value rather than method existence.
Co-authored-by: Ona <no-reply@ona.com>
Introduces FeedEngine that consumes FeedSource instances and manages
the dependency graph for context flow and item collection.
- Validates dependency graph (missing deps, circular references)
- Topologically sorts sources for execution order
- Runs fetchContext() in dependency order, accumulating context
- Runs fetchItems() on all sources with final context
- Supports reactive updates via onContextUpdate/onItemsUpdate
- Graceful error handling (continues after source failures)
Marks DataSource, ContextProvider, ContextBridge, Reconciler, and
FeedController as deprecated in favor of FeedSource + FeedEngine.
Co-authored-by: Ona <no-reply@ona.com>
