Full ActivityPub implementation wired to cf-core.activitypub module:
Endpoints (root-level, not under /api/v1):
GET /.well-known/webfinger — WebFinger JRD (AP_ENABLED only)
GET /ap/actor — Instance actor document
POST /ap/actor/inbox — Incoming Follow/Undo (dedup + Accept dispatch)
GET /ap/outbox — OrderedCollection of community posts
GET /ap/posts/{slug} — Individual AP Note
GET /ap/followers — Follower count collection
GET /ap/following — Empty following collection
Mastodon OAuth (under /api/v1/social/mastodon/):
POST /connect — Dynamic app registration + OAuth flow start
GET /callback — Code exchange + token storage (Fernet-encrypted)
DELETE /disconnect — Token revocation
GET /status — Connection status
Config: AP_ENABLED, AP_HOST, AP_KEY_PATH, AP_TOKEN_ENCRYPTION_KEY
Migration 042: ap_followers, ap_deliveries, ap_received, mastodon_tokens tables
Key manager: auto-generates RSA-2048 keypair on first boot if AP_ENABLED
Delivery service: deliver_to_followers() with 3-retry exponential backoff + DB log
Post publish: background fan-out to AP followers + Mastodon when opted-in
All AP endpoints gracefully degrade (404) when AP_ENABLED=false.
Three-layer dedup check before community post submission:
- L1: title ILIKE search against existing posts in community DB
- L2: Jaccard ingredient overlap using local corpus (≥0.70 very_similar, ≥0.35 somewhat_similar)
- L3: similar_to_ref FK — user can explicitly mark post as variation of existing
New endpoint: POST /api/v1/community/check-similar (gracefully no-ops if community DB absent)
New service: app/services/community/dedup.py — jaccard(), similarity_tier(), build_similar_post_result()
Both publish modals (plan + outcome) now check similarity before submit; user can proceed as-is,
mark as variation, or cancel. similar_to_ref passed in final publish payload.
Adds GET /community/posts, GET /community/posts/{slug}, GET /community/feed.rss,
GET /community/local-feed, POST /community/posts, DELETE /community/posts/{slug},
POST /community/posts/{slug}/fork, and POST /community/posts/{slug}/fork-adapt (501 stub).
Wires init_community_store into main.py lifespan. 7 new tests; 115 total passing.
