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trails/openspec/changes/federation-hardening/tasks.md
Ullrich Schäfer 5dd4968626 docs+openspec: prior-art research (Organic Maps, Endurain, wanderer) and 15 proposals 
Add docs/inspirations.md as the durable record of the 2026-07-05/06
prior-art research — per-project learnings with source paths, canonical
credit lines, and the changes each spawned — and extend the
acknowledgment lists in philosophy.md/architecture.md (Organic Maps,
Endurain, wanderer).

New OpenSpec changes (proposal/design/specs/tasks each):
- Organic Maps: elevation-profile-hardening, gpx-parser-robustness,
  hiking-time-estimate, poi-index, hiking-foot-profile
- Endurain: account-export, activity-duplicate-review,
  fit-parsing-hardening, activity-locations, self-hosting-guide,
  activity-privacy-controls
- wanderer: federation-hardening, link-share-tokens
- credits-page (user-visible acknowledgments)

Updated in-flight changes with wanderer prior-art sections:
route-federation, route-discovery.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-06 07:23:00 +02:00

1.8 KiB
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1. Durable queue

  • 1.1 Implement federation-queue.server.ts: Fedify MessageQueue over pg-boss (enqueue with delay, listen loop), mirroring the PostgresKvStore adapter pattern
  • 1.2 Swap InProcessMessageQueue for it in federation.server.ts; document the two-layer queueing (fan-out jobs + Fedify queue) in a code comment
  • 1.3 Tests: enqueue/delay/consume roundtrip; simulated restart (new listener picks up previously enqueued messages)

2. Replay defense

  • 2.1 Add federation_processed_activities table (activity IRI PK, received_at) + migration; insert-or-drop check in inbox handlers before side effects
  • 2.2 30-day TTL sweep in the jobs worker
  • 2.3 Tests: duplicate Like/Delete/Update dropped as no-ops; Create double-delivery still covered by remoteOriginIri constraint

3. Blocklist

  • 3.1 Add federation_blocked_instances table + migration; exact-host check helper
  • 3.2 Enforce at inbox (silent 202 drop + counter), delivery enqueue (filter recipients), and outbox poll/actor fetch (refuse)
  • 3.3 Document the operator procedure (SQL insert/delete) in the ops docs; tests for all three boundaries

4. Protocol doc & observability

  • 4.1 Write FEDERATION.md (repo root): NodeInfo, actors/WebFinger, object + activity types with JSON examples, addressing, signatures + dedup expectations, retry policy, moderation semantics; link from README and docs
  • 4.2 Add federation_delivery_total{outcome}, federation_queue_depth, federation_inbox_dropped_total{reason} metrics + journal dashboard row

5. Verification

  • 5.1 Staging check: queue a fan-out, restart the journal container, confirm deliveries complete; block a test domain and verify both directions
  • 5.2 Run pnpm typecheck && pnpm lint && pnpm test && pnpm test:e2e