kenneth 181160b018 feat(core): add FeedEngine for FeedSource orchestration
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>
2026-01-24 22:42:00 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 00:56:55 +00:00
2026-01-16 23:51:05 +00:00
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2026-01-16 00:56:55 +00:00

aris

To install dependencies:

bun install

Packages

@aris/data-source-tfl

TfL (Transport for London) data source for tube, overground, and Elizabeth line alerts.

Testing

cd packages/aris-data-source-tfl
bun run test

Fixtures

Tests use fixture data from real TfL API responses stored in fixtures/tfl-responses.json.

To refresh fixtures:

bun run fetch-fixtures
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