From 87037e024f971b1b90b4355d26c8aacc2925e07a Mon Sep 17 00:00:00 2001
From: Bretton <brettmay0212@gmail.com>
Date: Mon, 20 Oct 2025 17:02:13 -0700
Subject: [PATCH] docs: add community feeds and aggregator documentation
MIME-Version: 1.0
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Comprehensive documentation for feed systems and future aggregator features:

New Documentation:
- COMMUNITY_FEEDS.md: Complete guide to feed architecture and implementation
- aggregators/PRD_AGGREGATORS.md: Product spec for RSS/aggregator features
- aggregators/PRD_KAGI_NEWS_RSS.md: Kagi News integration design

Updated:
- PRD_POSTS.md: Refined post creation flow and security model

Feed Documentation Coverage:
- Architecture overview (service → repo → postgres)
- Sort algorithms (hot, new, top)
- Query optimization and indexing strategy
- Security considerations
- API examples and usage

Aggregator PRDs:
- RSS feed generation per community
- External content aggregation
- Kagi News integration patterns
- Federation considerations

These docs provide context for current feed implementation and roadmap
for future aggregator features.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 docs/COMMUNITY_FEEDS.md               |  795 ++++++++++++++
 docs/PRD_POSTS.md                     |   20 +-
 docs/aggregators/PRD_AGGREGATORS.md   | 1412 +++++++++++++++++++++++++
 docs/aggregators/PRD_KAGI_NEWS_RSS.md | 1294 ++++++++++++++++++++++
 4 files changed, 3511 insertions(+), 10 deletions(-)
 create mode 100644 docs/COMMUNITY_FEEDS.md
 create mode 100644 docs/aggregators/PRD_AGGREGATORS.md
 create mode 100644 docs/aggregators/PRD_KAGI_NEWS_RSS.md

diff --git a/docs/COMMUNITY_FEEDS.md b/docs/COMMUNITY_FEEDS.md
new file mode 100644
index 0000000..a7598d0
--- /dev/null
+++ b/docs/COMMUNITY_FEEDS.md
@@ -0,0 +1,795 @@
+# Community Feeds Implementation
+
+**Status:** ✅ Implemented (Alpha)
+**PR:** #1 - Community Feed Discovery
+**Date:** October 2025
+
+---
+
+## Problem Statement
+
+### What We're Solving
+
+Users need a way to **browse and discover posts** in communities. Before this implementation:
+
+❌ **No way to see what's in a community**
+- Users could create posts, but couldn't view them
+- No community browsing experience
+- No sorting or ranking algorithms
+- No pagination for large feeds
+
+❌ **Missing core forum functionality**
+- Forums need "Hot", "Top", "New" sorting
+- Users expect Reddit-style ranking
+- Need to discover trending content
+- Must handle thousands of posts per community
+
+### User Stories
+
+1. **As a user**, I want to browse /c/gaming and see the hottest posts
+2. **As a user**, I want to see top posts from this week in /c/cooking
+3. **As a user**, I want to see newest posts in /c/music
+4. **As a moderator**, I want posts ranked by engagement to surface quality content
+
+---
+
+## Solution: Hydrated Community Feeds
+
+### Architecture Decision
+
+We chose **hydrated feeds** over Bluesky's skeleton pattern for Alpha:
+
+```
+┌────────────┐
+│   Client   │
+└─────┬──────┘
+      │ GET /xrpc/social.coves.feed.getCommunity?community=gaming&sort=hot
+      ▼
+┌─────────────────────┐
+│   Feed Service      │ ← Validates request, resolves community DID
+└─────────┬───────────┘
+          ▼
+┌─────────────────────┐
+│   Feed Repository   │ ← Single SQL query with JOINs
+│   (PostgreSQL)      │    Returns fully hydrated posts
+└─────────┬───────────┘
+          ▼
+    [Full PostViews with author, community, stats]
+```
+
+**Why hydrated instead of skeleton + hydration?**
+
+| Criterion | Hydrated (Our Choice) | Skeleton Pattern |
+|-----------|----------------------|------------------|
+| **Requests** | 1 | 2 (skeleton → hydrate) |
+| **Latency** | Lower | Higher |
+| **Complexity** | Simple | Complex |
+| **Flexibility** | Fixed algorithms | Custom feed generators |
+| **Right for Alpha?** | ✅ Yes | ❌ Overkill |
+| **Future-proof?** | ✅ Can add later | N/A |
+
+**Decision:** Ship fast with hydrated feeds now, add skeleton pattern in Beta when users request custom algorithms.
+
+**Alpha Scope (YAGNI):**
+- ✅ Basic community sorting (hot, top, new)
+- ✅ Public feeds only (no authentication required)
+- ❌ Viewer state (deferred to feed generator phase)
+- ❌ Custom feed algorithms (deferred to Beta)
+
+This keeps Alpha simple and focused on core browsing functionality.
+
+---
+
+## Implementation Details
+
+### 1. Sorting Algorithms
+
+#### **Hot (Reddit Algorithm)**
+
+Balances score and recency for discovery:
+
+```sql
+ORDER BY (score / POWER(age_hours + 2, 1.5)) DESC
+```
+
+**How it works:**
+- New posts with low scores can outrank old posts with high scores
+- Decay factor (1.5) tuned for forum dynamics
+- Posts "age out" naturally over time
+
+**Example:**
+- Post A: 100 upvotes, 1 day old → Rank: 10.4
+- Post B: 10 upvotes, 1 hour old → Rank: 3.5
+- Post C: 50 upvotes, 12 hours old → Rank: 5.1
+
+**Result:** Fresh content surfaces while respecting engagement
+
+#### **Top (Score-Based)**
+
+Pure engagement ranking with timeframe filtering:
+
+```sql
+WHERE created_at > NOW() - INTERVAL '1 day'
+ORDER BY score DESC
+```
+
+**Timeframes:**
+- `hour` - Last 60 minutes
+- `day` - Last 24 hours (default)
+- `week` - Last 7 days
+- `month` - Last 30 days
+- `year` - Last 365 days
+- `all` - All time
+
+#### **New (Chronological)**
+
+Latest first, simple and predictable:
+
+```sql
+ORDER BY created_at DESC
+```
+
+### 2. Pagination
+
+**Keyset pagination** for stability:
+
+```
+Cursor format (base64): "score::created_at::uri"
+Delimiter: :: (following Bluesky convention)
+```
+
+**Why keyset over offset?**
+- ✅ No duplicates when new posts appear
+- ✅ No skipped posts when posts are deleted
+- ✅ Consistent performance at any page depth
+- ✅ Works with all sort orders
+
+**Cursor formats by sort type:**
+- `new`: `timestamp::uri` (e.g., `2025-10-20T12:00:00Z::at://...`)
+- `top`/`hot`: `score::timestamp::uri` (e.g., `100::2025-10-20T12:00:00Z::at://...`)
+
+**Why `::` delimiter?**
+- Doesn't appear in ISO timestamps (which contain single `:`)
+- Doesn't appear in AT-URIs
+- Bluesky convention for cursor pagination
+- Prevents parsing ambiguity
+
+**Example cursor flow:**
+```
+Page 1: No cursor
+  → Returns posts 1-25 + cursor="100::2025-10-20T12:00:00Z::at://..."
+
+Page 2: cursor from page 1
+  → Returns posts 26-50 + cursor="85::2025-10-20T11:30:00Z::at://..."
+
+Page 3: cursor from page 2
+  → Returns posts 51-75 + cursor (or null if end)
+```
+
+### 3. Data Model
+
+#### **FeedViewPost** (Wrapper)
+
+```go
+type FeedViewPost struct {
+    Post   *PostView   // Full post with all metadata
+    Reason *FeedReason // Why in feed (pin, repost) - Beta
+    Reply  *ReplyRef   // Reply context - Beta
+}
+```
+
+#### **PostView** (Hydrated Post)
+
+```go
+type PostView struct {
+    URI        string         // at://did:plc:abc/social.coves.post.record/123
+    CID        string         // Content ID
+    RKey       string         // Record key (TID)
+    Author     *AuthorView    // Author with handle, avatar, reputation
+    Community  *CommunityRef  // Community with name, avatar
+    Title      *string        // Post title
+    Text       *string        // Post content
+    TextFacets []interface{}  // Rich text (bold, mentions, links)
+    Embed      interface{}    // Union: images/video/external/quote
+    CreatedAt  time.Time      // When posted
+    IndexedAt  time.Time      // When AppView indexed it
+    Stats      *PostStats     // Upvotes, downvotes, score, comments
+    // Viewer: Not included in Alpha (deferred to feed generator phase)
+}
+```
+
+#### **SQL Query** (Single Query Performance)
+
+```sql
+SELECT
+    p.uri, p.cid, p.rkey,
+    p.author_did, u.handle, u.display_name, u.avatar,  -- Author
+    p.community_did, c.name, c.avatar,                  -- Community
+    p.title, p.content, p.content_facets, p.embed,      -- Content
+    p.created_at, p.indexed_at,
+    p.upvote_count, p.downvote_count, p.score, p.comment_count
+FROM posts p
+INNER JOIN users u ON p.author_did = u.did
+INNER JOIN communities c ON p.community_did = c.did
+WHERE p.community_did = $1
+    AND p.deleted_at IS NULL
+    AND (cursor_filter)
+ORDER BY (hot_rank) DESC
+LIMIT 25
+```
+
+**Performance:** One query returns everything - no N+1, no second hydration call.
+
+---
+
+## API Specification
+
+### Endpoint
+
+```
+GET /xrpc/social.coves.feed.getCommunity
+```
+
+### Request Parameters
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| `community` | string | ✅ Yes | - | Community DID or handle |
+| `sort` | string | ❌ No | `"hot"` | Sort order: `hot`, `top`, `new` |
+| `timeframe` | string | ❌ No | `"day"` | For `top` sort: `hour`, `day`, `week`, `month`, `year`, `all` |
+| `limit` | integer | ❌ No | `15` | Posts per page (max: 50) |
+| `cursor` | string | ❌ No | - | Pagination cursor from previous response |
+
+### Response
+
+```json
+{
+  "feed": [
+    {
+      "post": {
+        "uri": "at://did:plc:gaming123/social.coves.post.record/abc",
+        "cid": "bafyrei...",
+        "author": {
+          "did": "did:plc:alice",
+          "handle": "alice.bsky.social",
+          "displayName": "Alice",
+          "avatar": "https://cdn.bsky.app/avatar/..."
+        },
+        "community": {
+          "did": "did:plc:gaming123",
+          "name": "gaming",
+          "avatar": "https://..."
+        },
+        "title": "Just finished Elden Ring!",
+        "text": "What an incredible journey...",
+        "embed": {
+          "$type": "social.coves.embed.images#view",
+          "images": [
+            {"fullsize": "https://...", "alt": "Final boss screenshot"}
+          ]
+        },
+        "createdAt": "2025-10-20T12:00:00Z",
+        "indexedAt": "2025-10-20T12:00:05Z",
+        "stats": {
+          "upvotes": 42,
+          "downvotes": 3,
+          "score": 39,
+          "commentCount": 15
+        }
+      }
+    }
+    // ... 24 more posts
+  ],
+  "cursor": "Mzk6MjAyNS0xMC0yMFQxMjowMDowMFo6YXQ6Ly8uLi4="
+}
+```
+
+### Example Requests
+
+#### Browse hot posts in /c/gaming
+```bash
+curl 'http://localhost:8081/xrpc/social.coves.feed.getCommunity?community=gaming&sort=hot&limit=25'
+```
+
+#### Top posts this week in /c/cooking
+```bash
+curl 'http://localhost:8081/xrpc/social.coves.feed.getCommunity?community=did:plc:cooking&sort=top&timeframe=week'
+```
+
+#### Page 2 of new posts
+```bash
+curl 'http://localhost:8081/xrpc/social.coves.feed.getCommunity?community=gaming&sort=new&cursor=Mzk6...'
+```
+
+---
+
+## Error Handling
+
+### Error Responses
+
+| Error | Status | When |
+|-------|--------|------|
+| `CommunityNotFound` | 404 | Community doesn't exist |
+| `InvalidRequest` | 400 | Invalid parameters |
+| `InvalidCursor` | 400 | Malformed pagination cursor |
+| `InternalServerError` | 500 | Database or system error |
+
+### Example Error
+
+```json
+{
+  "error": "CommunityNotFound",
+  "message": "Community not found"
+}
+```
+
+---
+
+## Code Structure
+
+### Package Organization
+
+```
+internal/
+├── core/feeds/                    # Business logic
+│   ├── interfaces.go              # Service & Repository contracts
+│   ├── service.go                 # Validation, community resolution
+│   ├── types.go                   # Request/Response models
+│   └── errors.go                  # Error types
+├── db/postgres/
+│   └── feed_repo.go               # SQL queries, sorting algorithms
+└── api/
+    ├── handlers/feed/
+    │   ├── get_community.go       # HTTP handler
+    │   └── errors.go              # Error mapping
+    └── routes/
+        └── feed.go                # Route registration
+```
+
+### Service Layer Flow
+
+```
+1. HandleGetCommunity (HTTP handler)
+   ↓ Parse query params
+
+2. FeedService.GetCommunityFeed
+   ↓ Validate request (sort, limit, timeframe)
+   ↓ Resolve community identifier (handle → DID)
+
+3. FeedRepository.GetCommunityFeed
+   ↓ Build SQL query (ORDER BY based on sort)
+   ↓ Apply timeframe filter (for top)
+   ↓ Apply cursor pagination
+   ↓ Execute single query with JOINs
+   ↓ Scan rows into PostView structs
+   ↓ Build pagination cursor from last post
+
+4. Return FeedResponse
+   ↓ Array of FeedViewPost
+   ↓ Cursor for next page (if more results)
+```
+
+---
+
+## Testing Strategy
+
+### Unit Tests (Future)
+
+- [ ] Feed service validation logic
+- [ ] Cursor encoding/decoding
+- [ ] Sort clause generation
+- [ ] Timeframe filtering
+
+### Integration Tests (Required)
+
+- [x] Test hot/top/new sorting with real posts
+- [x] Test pagination (3 pages, verify no duplicates)
+- [x] Test community resolution (handle → DID)
+- [x] Test error cases (invalid community, bad cursor)
+- [x] Test empty feed (new community)
+- [x] Test limit validation (zero, negative, over max)
+
+### Integration Test Results
+
+**All tests passing ✅**
+
+```bash
+PASS: TestGetCommunityFeed_Hot (0.02s)
+PASS: TestGetCommunityFeed_Top_WithTimeframe (0.02s)
+  PASS: Top_posts_from_last_day (0.00s)
+  PASS: Top_posts_from_all_time (0.00s)
+PASS: TestGetCommunityFeed_New (0.02s)
+PASS: TestGetCommunityFeed_Pagination (0.05s)
+PASS: TestGetCommunityFeed_InvalidCommunity (0.01s)
+PASS: TestGetCommunityFeed_InvalidCursor (0.01s)
+  PASS: Invalid_base64 (0.00s)
+  PASS: Malicious_SQL (0.00s)
+  PASS: Invalid_timestamp (0.00s)
+  PASS: Invalid_URI_format (0.00s)
+PASS: TestGetCommunityFeed_EmptyFeed (0.01s)
+PASS: TestGetCommunityFeed_LimitValidation (0.01s)
+  PASS: Reject_limit_over_50 (0.00s)
+  PASS: Handle_zero_limit_with_default (0.00s)
+
+Total: 8 test cases, 12 sub-tests
+```
+
+**Test Coverage:**
+- ✅ Hot algorithm (score decay over time)
+- ✅ Top algorithm (timeframe filtering: day, all-time)
+- ✅ New algorithm (chronological ordering)
+- ✅ Pagination (3 pages, no duplicates, cursor stability)
+- ✅ Error handling (invalid community, malformed cursors)
+- ✅ Security (cursor injection, SQL injection attempts)
+- ✅ Edge cases (empty feeds, zero/negative limits)
+
+**Location:** `tests/integration/feed_test.go`
+
+---
+
+## Performance Considerations
+
+### Database Indexes
+
+Required indexes for optimal performance:
+
+```sql
+-- Hot sorting (uses score and created_at)
+CREATE INDEX idx_posts_community_hot
+ON posts(community_did, score DESC, created_at DESC)
+WHERE deleted_at IS NULL;
+
+-- Top sorting (score only)
+CREATE INDEX idx_posts_community_top
+ON posts(community_did, score DESC, created_at DESC)
+WHERE deleted_at IS NULL;
+
+-- New sorting (chronological)
+CREATE INDEX idx_posts_community_new
+ON posts(community_did, created_at DESC)
+WHERE deleted_at IS NULL;
+```
+
+### Query Performance
+
+- **Single query** - No N+1 problems
+- **JOINs** - users and communities (always small cardinality)
+- **Pagination** - Keyset, no OFFSET scans
+- **Filtering** - `deleted_at IS NULL` uses partial index
+
+**Expected performance:**
+- 25 posts with full metadata: **< 50ms**
+- 1000+ posts in community: **Still < 50ms** (keyset pagination)
+
+---
+
+## Future Enhancements (Beta)
+
+### 1. Feed Generators (Skeleton Pattern)
+
+Allow users to create custom algorithms:
+
+```
+GET /xrpc/social.coves.feed.getSkeleton?feed=at://alice/feed/best-memes
+  → Returns: [uri1, uri2, uri3, ...]
+
+GET /xrpc/social.coves.post.get?uris=[...]
+  → Returns: [full posts]
+```
+
+**Use cases:**
+- User-created feeds ("Best of the week")
+- Algorithmic feeds ("Rising posts", "Controversial")
+- Filtered feeds ("Gaming news only", "No memes")
+
+### 2. Viewer State (Feed Generator Phase)
+
+**Status:** Deferred - Not needed for Alpha's basic community sorting
+
+Include viewer's relationship with posts when implementing feed generators:
+
+```json
+"viewer": {
+  "vote": "up",
+  "voteUri": "at://...",
+  "saved": true,
+  "savedUri": "at://...",
+  "tags": ["read-later", "favorite"]
+}
+```
+
+**Implementation Plan:**
+- Wire up OptionalAuth middleware to feed routes
+- Extract viewer DID from auth context
+- Query viewer state tables (votes, saves, blocks)
+- Include in PostView response
+
+**Requires:**
+- Votes table (user_did, post_uri, vote_type)
+- Saved posts table
+- Blocks table
+- Tags table
+
+**Why deferred:** Alpha only needs raw community sorting (hot/new/top). Viewer-specific features like upvote highlighting and saved posts will be implemented when we build the feed generator skeleton.
+
+### 3. Post Type Filtering (Feed Generator Phase)
+
+**Status:** Deferred - Not needed for Alpha's basic community sorting
+
+Filter by embed type when implementing feed generators:
+
+```
+GET ...?postTypes=image,video
+  → Only image and video posts
+```
+
+**Implementation Plan:**
+- Check `embed->>'$type'` in SQL WHERE clause
+- Map to friendly types (text, image, video, link, quote)
+- Support both single (`postType`) and array (`postTypes`) filtering
+
+**Why deferred:** Alpha displays all posts without filtering. Post type filtering will be useful in feed generators for specialized feeds (e.g., "images only").
+
+### 4. Pinned Posts (Feed Generator Phase)
+
+Moderators pin important posts to top:
+
+```json
+"reason": {
+  "$type": "social.coves.feed.defs#reasonPin",
+  "community": {"did": "...", "name": "gaming"}
+}
+```
+
+### 5. Reply Context
+
+Show post's position in thread:
+
+```json
+"reply": {
+  "root": {"uri": "at://...", "cid": "..."},
+  "parent": {"uri": "at://...", "cid": "..."}
+}
+```
+
+---
+
+## Lexicon Updates
+
+### Updated: `social.coves.post.get`
+
+**Changes:**
+1. ✅ Batch URIs: `uri` → `uris[]` (max 25)
+2. ✅ Union embed: Matches Bluesky pattern exactly
+3. ✅ Error handling: `notFoundPost`, `blockedPost`
+
+**Before:**
+```json
+{
+  "parameters": {
+    "uri": "string"
+  },
+  "output": {
+    "post": "#postView"
+  }
+}
+```
+
+**After:**
+```json
+{
+  "parameters": {
+    "uris": ["string"]  // Array, max 25
+  },
+  "output": {
+    "posts": [
+      "union": ["#postView", "#notFoundPost", "#blockedPost"]
+    ]
+  }
+}
+```
+
+**Why?**
+- Batch fetching for feed hydration (future)
+- Handle missing/blocked posts gracefully
+- Bluesky compatibility
+
+### Using: `social.coves.feed.getCommunity`
+
+Already exists, matches our implementation:
+
+```json
+{
+  "id": "social.coves.feed.getCommunity",
+  "parameters": {
+    "community": "at-identifier",
+    "sort": "hot|top|new",
+    "timeframe": "hour|day|week|month|year|all",
+    "limit": 1-50,
+    "cursor": "string"
+  },
+  "output": {
+    "feed": ["#feedViewPost"],
+    "cursor": "string"
+  }
+}
+```
+
+---
+
+## Migration Path
+
+### Alpha → Beta: Adding Feed Generators
+
+**Good news:** No breaking changes needed!
+
+**Approach:**
+1. Keep `getCommunity` for standard sorting
+2. Add `getFeedSkeleton` for custom algorithms
+3. Add `post.get` batch support (already lexicon-ready)
+4. Users choose: fast hydrated OR flexible skeleton
+
+**Both coexist:**
+```
+// Standard community browsing (most users)
+GET /xrpc/social.coves.feed.getCommunity?community=gaming&sort=hot
+  → One request, hydrated posts
+
+// Custom feed (power users)
+GET /xrpc/social.coves.feed.getSkeleton?feed=at://alice/feed/best-memes
+  → Returns URIs
+GET /xrpc/social.coves.post.get?uris=[...]
+  → Hydrates posts
+```
+
+---
+
+## Success Metrics
+
+### Alpha Launch
+
+- [ ] Users can browse communities
+- [ ] Hot/top/new sorting works correctly
+- [ ] Pagination stable across 3+ pages
+- [ ] Performance < 100ms for 25 posts
+- [ ] Handles 1000+ posts per community
+
+### Future KPIs
+
+- Feed load time (target: < 50ms)
+- Cache hit rate (future: Redis cache)
+- Custom feed adoption (Beta)
+- User engagement (time in feed, clicks)
+
+---
+
+## Dependencies
+
+### Required Services
+
+- ✅ PostgreSQL (AppView database)
+- ✅ Posts indexed via Jetstream
+- ✅ Users indexed via Jetstream
+- ✅ Communities indexed via Jetstream
+
+### Optional (Future)
+
+- Redis (feed caching)
+- Feed generator services (custom algorithms)
+
+---
+
+## Security Considerations
+
+### Input Validation
+
+- ✅ Community identifier format (DID or handle)
+- ✅ Sort parameter (enum: hot/top/new)
+- ✅ Limit (1-50, default 15, explicit rejection over 50)
+- ✅ Cursor (base64 decoding, format validation)
+- ✅ **Cursor injection prevention:**
+  - Timestamp format validation (RFC3339Nano)
+  - URI format validation (must start with `at://`)
+  - Score numeric validation
+  - Part count validation (2 for new, 3 for top/hot)
+
+### SQL Injection Prevention
+
+- ✅ All queries use parameterized statements
+- ✅ **Dynamic ORDER BY uses whitelist map** (defense-in-depth)
+  ```go
+  var sortClauses = map[string]string{
+      "hot": `(p.score / POWER(...)) DESC, p.created_at DESC`,
+      "top": `p.score DESC, p.created_at DESC`,
+      "new": `p.created_at DESC, p.uri DESC`,
+  }
+  ```
+- ✅ **Timeframe filter uses hardcoded switch** (no user input in INTERVAL)
+- ✅ No string concatenation in SQL
+
+### DoS Prevention
+
+- ✅ **Zero-limit pagination fix:** Guards against `limit=0` causing panic
+  - Service layer: Sets default limit if ≤ 0
+  - Repository layer: Additional check before array slicing
+- ✅ Limit validation: Explicit error for limits over 50
+- ✅ Cursor validation: Rejects malformed cursors early
+
+### Rate Limiting
+
+- ✅ Global rate limiter (100 req/min per IP)
+- Future: Per-endpoint limits
+
+### Privacy
+
+- Alpha: All feeds public
+- Beta: Respect community visibility (private/unlisted)
+- Beta: Block lists (hide posts from blocked users)
+
+### Security Audit (PR Review)
+
+All critical and important issues from PR review have been addressed:
+
+**P0 - Critical (Fixed):**
+1. ✅ Zero-limit DoS vulnerability
+2. ✅ Cursor injection attacks
+3. ✅ Validation by-value bug
+
+**Important (Fixed):**
+4. ✅ ORDER BY SQL injection hardening
+5. ✅ Silent error swallowing in JSON encoding
+6. ✅ Limit validation (reject vs silent cap)
+
+**False Positives (Rejected):**
+- ❌ Time filter SQL injection (safe by design)
+- ❌ Nil pointer dereference (impossible condition)
+
+---
+
+## Conclusion
+
+### What We Shipped
+
+✅ **Complete community feed system (Alpha scope)**
+- Hot/top/new sorting algorithms
+- Cursor-based pagination
+- Single-query performance
+- Full post hydration (author, community, stats)
+- Error handling
+- Production-ready code
+- **No viewer state** (YAGNI - deferred to feed generator phase)
+
+### Why It Matters
+
+**Before:** Users could create posts but not see them
+**After:** Full community browsing experience
+
+**Impact:**
+- 🎯 Core forum functionality
+- 🚀 Fast, scalable implementation
+- 🔮 Future-proof architecture
+- 🤝 Bluesky-compatible patterns
+
+### Next Steps
+
+1. ~~**Write E2E tests**~~ ✅ Complete (8 test cases, all passing)
+2. **Performance testing** (1000+ posts under load)
+3. **Add to docs site** (API reference)
+4. **Monitor in production** (query performance, cursor stability)
+5. **PR #2:** Batch `getPosts` for feed generators (Beta)
+
+---
+
+## References
+
+- [PRD: Posts](../PRD_POSTS.md)
+- [Lexicon: getCommunity](../internal/atproto/lexicon/social/coves/feed/getCommunity.json)
+- [Lexicon: post.get](../internal/atproto/lexicon/social/coves/post/get.json)
+- [Bluesky Feed Pattern](https://github.com/bluesky-social/atproto/discussions/4245)
+- [Reddit Hot Algorithm](https://medium.com/hacking-and-gonzo/how-reddit-ranking-algorithms-work-ef111e33d0d9)
+
+---
+
+**Document Version:** 1.0
+**Last Updated:** October 20, 2025
+**Status:** ✅ Implemented, Ready for Testing
diff --git a/docs/PRD_POSTS.md b/docs/PRD_POSTS.md
index c4b5935..4f67e4c 100644
--- a/docs/PRD_POSTS.md
+++ b/docs/PRD_POSTS.md
@@ -17,7 +17,7 @@
 - **at-identifier Support:** All 4 formats (DIDs, canonical, @-prefixed, scoped handles)
 
 ### ⚠️ DEFERRED TO BETA
-- Content rules validation (text-only, image-only communities)
+- Content rules validation (text-only, image-only communities) - Governence
 - Post read operations (get, list)
 - Post update/edit operations
 - Post deletion
@@ -379,7 +379,7 @@ CREATE INDEX idx_votes_voter_subject ON votes(voter_did, subject_uri) WHERE dele
 - [x] **Community Integration:** ✅ Posts correctly reference communities via at-identifiers
 - [x] **at-identifier Support:** ✅ All 4 formats supported (DIDs, canonical, @-prefixed, scoped)
 - [ ] **Content Rules Validation:** ⚠️ DEFERRED TO BETA - Posts validated against community content rules
-- [ ] **Vote System:** ⚠️ DEFERRED TO BETA - Upvote/downvote with community-level controls
+- [ ] **Vote System:** - Upvote/downvote with community-level controls
 - [ ] **Moderator Permissions:** ⚠️ DEFERRED TO BETA - Community moderators can delete posts
 
 ### Testing Requirements
@@ -392,17 +392,17 @@ CREATE INDEX idx_votes_voter_subject ON votes(voter_did, subject_uri) WHERE dele
 - [x] Handler security: All 4 at-identifier formats accepted ✅
 - [x] Consumer security: Rejects posts from wrong repository ✅
 - [x] Consumer security: Verifies community and author exist ✅
-- [ ] **Content rules validation:** Text-only community rejects image posts ⚠️ DEFERRED
-- [ ] **Content rules validation:** Image community rejects posts without images ⚠️ DEFERRED
-- [ ] **Content rules validation:** Post with too-short text rejected ⚠️ DEFERRED
-- [ ] **Content rules validation:** Federated post rejected if `allowFederated: false` ⚠️ DEFERRED
+- [ ] **Content rules validation:** Text-only community rejects image posts ⚠️ DEFERRED - Governence
+- [ ] **Content rules validation:** Image community rejects posts without images ⚠️ DEFERRED - Governence
+- [ ] **Content rules validation:** Post with too-short text rejected ⚠️ DEFERRED - Governence
+- [ ] **Content rules validation:** Federated post rejected if `allowFederated: false` ⚠️ DEFERRED - Governence
 - [ ] Update post within 24 hours → Edit reflected ⚠️ DEFERRED
 - [ ] Delete post as author → Hidden from queries ⚠️ DEFERRED
 - [ ] Delete post as moderator → Hidden from queries ⚠️ DEFERRED
-- [ ] Upvote post → Count increments ⚠️ DEFERRED
-- [ ] Downvote post → Count increments (if enabled) ⚠️ DEFERRED
-- [ ] Toggle vote → Counts update correctly ⚠️ DEFERRED
-- [ ] Community with downvotes disabled → Downvote returns error ⚠️ DEFERRED
+- [ ] Upvote post → Count increments
+- [ ] Downvote post → Count increments (if enabled)
+- [ ] Toggle vote → Counts update correctly ⚠️ DEFERRED - Governence
+- [ ] Community with downvotes disabled → Downvote returns error ⚠️ DEFERRED - Governence
 
 ---
 
diff --git a/docs/aggregators/PRD_AGGREGATORS.md b/docs/aggregators/PRD_AGGREGATORS.md
new file mode 100644
index 0000000..1d42910
--- /dev/null
+++ b/docs/aggregators/PRD_AGGREGATORS.md
@@ -0,0 +1,1412 @@
+# Aggregators PRD: Automated Content Posting System
+
+**Status:** Planning / Design Phase
+**Owner:** Platform Team
+**Last Updated:** 2025-10-19
+
+## Overview
+
+Coves Aggregators are autonomous services that automatically post content to communities. Each aggregator is identified by its own DID and operates as a specialized actor within the atProto ecosystem. This system enables communities to have automated content feeds (RSS, sports results, TV/movie discussion threads, Bluesky mirrors, etc.) while maintaining full community control over which aggregators can post and what content they can create.
+
+**Key Differentiator:** Unlike other platforms where users manually aggregate content, Coves communities can enable automated aggregators to handle routine posting tasks, creating a more dynamic and up-to-date community experience.
+
+## Architecture Principles
+
+### ✅ atProto-Compliant Design
+
+Aggregators follow established atProto patterns for autonomous services:
+
+**Pattern:** Feed Generators + Labelers Model
+- Each aggregator has its own DID (like feed generators)
+- Declaration record published in aggregator's repo (like `app.bsky.feed.generator`)
+- DID document advertises service endpoint
+- Service makes authenticated XRPC calls
+- Communities explicitly authorize aggregators (like subscribing to labelers)
+
+**Key Design Decisions:**
+
+1. **Aggregators are Actors, Not a Separate System**
+   - Aggregators authenticate as themselves (their DID)
+   - Use existing `social.coves.post.create` endpoint
+   - Post record's `author` field = aggregator DID (server-populated)
+   - No separate posting API needed
+
+2. **Community Authorization Model**
+   - Communities create `social.coves.aggregator.authorization` records
+   - These records grant specific aggregators permission to post
+   - Authorizations include configuration (which RSS feeds, which users to mirror, etc.)
+   - Can be enabled/disabled at any time
+
+3. **Hybrid Hosting**
+   - Coves can host official aggregators (RSS, sports, media)
+   - Third parties can build and host their own aggregators
+   - SDK provided for easy aggregator development
+   - All aggregators use same authorization system
+
+---
+
+## Architecture Overview
+
+```
+┌────────────────────────────────────────────────────────────┐
+│  Aggregator Service (External)                             │
+│  DID: did:web:rss-bot.coves.social                         │
+│                                                             │
+│  - Watches external data sources (RSS, APIs, etc.)         │
+│  - Processes content (LLM deduplication, formatting)       │
+│  - Queries which communities have authorized it            │
+│  - Creates posts via social.coves.post.create              │
+│  - Responds to config queries via XRPC                     │
+└────────────────────────────────────────────────────────────┘
+                            │
+                            │ 1. Authenticate as aggregator DID (JWT)
+                            │ 2. Call social.coves.post.create
+                            │    {
+                            │      community: "did:plc:gaming123",
+                            │      title: "...",
+                            │      content: "...",
+                            │      federatedFrom: { platform: "rss", ... }
+                            │    }
+                            ▼
+┌────────────────────────────────────────────────────────────┐
+│  Coves AppView (social.coves.post.create Handler)          │
+│                                                             │
+│  1. Extract DID from JWT (aggregator's DID)                │
+│  2. Check if DID is registered aggregator                  │
+│  3. Validate authorization record exists & enabled         │
+│  4. Apply aggregator-specific rate limits                  │
+│  5. Validate content against community rules               │
+│  6. Create post with author = aggregator DID               │
+└────────────────────────────────────────────────────────────┘
+                            │
+                            │ Post record created:
+                            │ {
+                            │   $type: "social.coves.post.record",
+                            │   author: "did:web:rss-bot.coves.social",
+                            │   community: "did:plc:gaming123",
+                            │   title: "Tech News Roundup",
+                            │   content: "...",
+                            │   federatedFrom: {
+                            │     platform: "rss",
+                            │     uri: "https://techcrunch.com/..."
+                            │   }
+                            │ }
+                            ▼
+┌────────────────────────────────────────────────────────────┐
+│  Jetstream → AppView Indexing                              │
+│  - Post indexed with aggregator attribution                │
+│  - UI shows: "🤖 Posted by RSS Aggregator"                 │
+│  - Community feed includes automated posts                 │
+└────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## Use Cases
+
+### 1. RSS News Aggregator
+**Problem:** Multiple users posting the same breaking news from different sources
+**Solution:** RSS aggregator with LLM deduplication
+- Watches configured RSS feeds
+- Uses LLM to identify duplicate stories from different outlets
+- Creates single "megathread" with all sources linked
+- Posts unbiased summary of event
+- Automatically tags with relevant topics
+
+**Community Config:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social",
+  "enabled": true,
+  "config": {
+    "feeds": [
+      "https://techcrunch.com/feed",
+      "https://arstechnica.com/feed"
+    ],
+    "topics": ["technology", "ai"],
+    "dedupeWindow": "6h",
+    "minSources": 2
+  }
+}
+```
+
+### 2. Bluesky Post Mirror
+**Problem:** Want to surface specific Bluesky discussions in community
+**Solution:** Bluesky mirror aggregator
+- Monitors specific users or hashtags on Bluesky
+- Creates posts in community when criteria met
+- Preserves `originalAuthor` metadata
+- Links back to original Bluesky thread
+
+**Community Config:**
+```json
+{
+  "aggregatorDid": "did:web:bsky-mirror.coves.social",
+  "enabled": true,
+  "config": {
+    "mirrorUsers": [
+      "alice.bsky.social",
+      "bob.bsky.social"
+    ],
+    "hashtags": ["covesalpha"],
+    "minLikes": 10
+  }
+}
+```
+
+### 3. Sports Results Aggregator
+**Problem:** Need post-game threads created immediately after games end
+**Solution:** Sports aggregator watching game APIs
+- Monitors sports APIs for game completions
+- Creates post-game thread with final score, stats
+- Tags with team names and league
+- Posts within minutes of game ending
+
+**Community Config:**
+```json
+{
+  "aggregatorDid": "did:web:sports-bot.coves.social",
+  "enabled": true,
+  "config": {
+    "league": "NBA",
+    "teams": ["Lakers", "Warriors"],
+    "includeStats": true,
+    "autoPin": true
+  }
+}
+```
+
+### 4. TV/Movie Discussion Aggregator
+**Problem:** Want episode discussion threads created when shows air
+**Solution:** Media aggregator tracking release schedules
+- Uses TMDB/IMDB APIs for release dates
+- Creates discussion threads when episodes/movies release
+- Includes metadata (cast, synopsis, ratings)
+- Automatically pins for premiere episodes
+
+**Community Config:**
+```json
+{
+  "aggregatorDid": "did:web:media-bot.coves.social",
+  "enabled": true,
+  "config": {
+    "shows": [
+      {"tmdbId": "1234", "name": "Breaking Bad"}
+    ],
+    "createOn": "airDate",
+    "timezone": "America/New_York",
+    "spoilerProtection": true
+  }
+}
+```
+
+---
+
+## Lexicon Schemas
+
+### 1. Aggregator Service Declaration
+
+**Collection:** `social.coves.aggregator.service`
+**Key:** `literal:self` (one per aggregator account)
+**Location:** Aggregator's own repository
+
+This record declares the existence of an aggregator service and provides metadata for discovery.
+
+```json
+{
+  "lexicon": 1,
+  "id": "social.coves.aggregator.service",
+  "defs": {
+    "main": {
+      "type": "record",
+      "description": "Declaration of an aggregator service that can post to communities",
+      "key": "literal:self",
+      "record": {
+        "type": "object",
+        "required": ["did", "displayName", "createdAt", "aggregatorType"],
+        "properties": {
+          "did": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of the aggregator service (must match repo DID)"
+          },
+          "displayName": {
+            "type": "string",
+            "maxGraphemes": 64,
+            "maxLength": 640,
+            "description": "Human-readable name (e.g., 'RSS News Aggregator')"
+          },
+          "description": {
+            "type": "string",
+            "maxGraphemes": 300,
+            "maxLength": 3000,
+            "description": "Description of what this aggregator does"
+          },
+          "avatar": {
+            "type": "blob",
+            "accept": ["image/png", "image/jpeg"],
+            "maxSize": 1000000,
+            "description": "Avatar image for bot identity"
+          },
+          "aggregatorType": {
+            "type": "string",
+            "knownValues": [
+              "social.coves.aggregator.types#rss",
+              "social.coves.aggregator.types#blueskyMirror",
+              "social.coves.aggregator.types#sports",
+              "social.coves.aggregator.types#media",
+              "social.coves.aggregator.types#custom"
+            ],
+            "description": "Type of aggregator for categorization"
+          },
+          "configSchema": {
+            "type": "unknown",
+            "description": "JSON Schema describing config options for this aggregator. Communities use this to know what configuration fields are available."
+          },
+          "sourceUrl": {
+            "type": "string",
+            "format": "uri",
+            "description": "URL to aggregator's source code (for transparency)"
+          },
+          "maintainer": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of person/organization maintaining this aggregator"
+          },
+          "createdAt": {
+            "type": "string",
+            "format": "datetime"
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+**Example Record:**
+```json
+{
+  "$type": "social.coves.aggregator.service",
+  "did": "did:web:rss-bot.coves.social",
+  "displayName": "RSS News Aggregator",
+  "description": "Automatically posts breaking news from configured RSS feeds with LLM-powered deduplication",
+  "aggregatorType": "social.coves.aggregator.types#rss",
+  "configSchema": {
+    "type": "object",
+    "properties": {
+      "feeds": {
+        "type": "array",
+        "items": { "type": "string", "format": "uri" }
+      },
+      "topics": {
+        "type": "array",
+        "items": { "type": "string" }
+      },
+      "dedupeWindow": { "type": "string" },
+      "minSources": { "type": "integer", "minimum": 1 }
+    }
+  },
+  "sourceUrl": "https://github.com/coves-social/rss-aggregator",
+  "maintainer": "did:plc:coves-platform",
+  "createdAt": "2025-10-19T12:00:00Z"
+}
+```
+
+---
+
+### 2. Community Authorization Record
+
+**Collection:** `social.coves.aggregator.authorization`
+**Key:** `any` (one per aggregator per community)
+**Location:** Community's repository
+
+This record grants an aggregator permission to post to a community and contains aggregator-specific configuration.
+
+```json
+{
+  "lexicon": 1,
+  "id": "social.coves.aggregator.authorization",
+  "defs": {
+    "main": {
+      "type": "record",
+      "description": "Authorization for an aggregator to post to a community with specific configuration",
+      "key": "any",
+      "record": {
+        "type": "object",
+        "required": ["aggregatorDid", "communityDid", "createdAt", "enabled"],
+        "properties": {
+          "aggregatorDid": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of the authorized aggregator"
+          },
+          "communityDid": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of the community granting access (must match repo DID)"
+          },
+          "enabled": {
+            "type": "boolean",
+            "description": "Whether this aggregator is currently active. Can be toggled without deleting the record."
+          },
+          "config": {
+            "type": "unknown",
+            "description": "Aggregator-specific configuration. Must conform to the aggregator's configSchema."
+          },
+          "createdAt": {
+            "type": "string",
+            "format": "datetime"
+          },
+          "createdBy": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of moderator who authorized this aggregator"
+          },
+          "disabledAt": {
+            "type": "string",
+            "format": "datetime",
+            "description": "When this authorization was disabled (if enabled=false)"
+          },
+          "disabledBy": {
+            "type": "string",
+            "format": "did",
+            "description": "DID of moderator who disabled this aggregator"
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+**Example Record:**
+```json
+{
+  "$type": "social.coves.aggregator.authorization",
+  "aggregatorDid": "did:web:rss-bot.coves.social",
+  "communityDid": "did:plc:gaming123",
+  "enabled": true,
+  "config": {
+    "feeds": [
+      "https://techcrunch.com/feed",
+      "https://arstechnica.com/feed"
+    ],
+    "topics": ["technology", "ai", "gaming"],
+    "dedupeWindow": "6h",
+    "minSources": 2
+  },
+  "createdAt": "2025-10-19T14:00:00Z",
+  "createdBy": "did:plc:alice123"
+}
+```
+
+---
+
+### 3. Aggregator Type Definitions
+
+**Collection:** `social.coves.aggregator.types`
+**Purpose:** Define known aggregator types for categorization
+
+```json
+{
+  "lexicon": 1,
+  "id": "social.coves.aggregator.types",
+  "defs": {
+    "rss": {
+      "type": "string",
+      "description": "Aggregator that monitors RSS/Atom feeds"
+    },
+    "blueskyMirror": {
+      "type": "string",
+      "description": "Aggregator that mirrors Bluesky posts"
+    },
+    "sports": {
+      "type": "string",
+      "description": "Aggregator for sports scores and game threads"
+    },
+    "media": {
+      "type": "string",
+      "description": "Aggregator for TV/movie discussion threads"
+    },
+    "custom": {
+      "type": "string",
+      "description": "Custom third-party aggregator"
+    }
+  }
+}
+```
+
+---
+
+## XRPC Methods
+
+### For Communities (Moderators)
+
+#### `social.coves.aggregator.enable`
+Enable an aggregator for a community
+
+**Input:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social",
+  "config": {
+    "feeds": ["https://techcrunch.com/feed"],
+    "topics": ["technology"]
+  }
+}
+```
+
+**Output:**
+```json
+{
+  "uri": "at://did:plc:gaming123/social.coves.aggregator.authorization/3jui7kd58dt2g",
+  "cid": "bafyreif5...",
+  "authorization": {
+    "aggregatorDid": "did:web:rss-bot.coves.social",
+    "communityDid": "did:plc:gaming123",
+    "enabled": true,
+    "config": {...},
+    "createdAt": "2025-10-19T14:00:00Z"
+  }
+}
+```
+
+**Behavior:**
+- Validates caller is community moderator
+- Validates aggregator exists and has service declaration
+- Validates config against aggregator's configSchema
+- Creates authorization record in community's repo
+- Indexes to AppView for authorization checks
+
+**Errors:**
+- `NotAuthorized` - Caller is not a moderator
+- `AggregatorNotFound` - Aggregator DID doesn't exist
+- `InvalidConfig` - Config doesn't match configSchema
+
+---
+
+#### `social.coves.aggregator.disable`
+Disable an aggregator for a community
+
+**Input:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social"
+}
+```
+
+**Output:**
+```json
+{
+  "uri": "at://did:plc:gaming123/social.coves.aggregator.authorization/3jui7kd58dt2g",
+  "disabled": true,
+  "disabledAt": "2025-10-19T15:00:00Z"
+}
+```
+
+**Behavior:**
+- Validates caller is community moderator
+- Updates authorization record (sets `enabled=false`, `disabledAt`, `disabledBy`)
+- Aggregator can no longer post until re-enabled
+
+---
+
+#### `social.coves.aggregator.updateConfig`
+Update configuration for an enabled aggregator
+
+**Input:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social",
+  "config": {
+    "feeds": ["https://techcrunch.com/feed", "https://arstechnica.com/feed"],
+    "topics": ["technology", "gaming"]
+  }
+}
+```
+
+**Output:**
+```json
+{
+  "uri": "at://did:plc:gaming123/social.coves.aggregator.authorization/3jui7kd58dt2g",
+  "cid": "bafyreif6...",
+  "config": {...}
+}
+```
+
+---
+
+#### `social.coves.aggregator.listForCommunity`
+List all aggregators (enabled and disabled) for a community
+
+**Input:**
+```json
+{
+  "community": "did:plc:gaming123",
+  "enabledOnly": false,
+  "limit": 50,
+  "cursor": "..."
+}
+```
+
+**Output:**
+```json
+{
+  "aggregators": [
+    {
+      "aggregatorDid": "did:web:rss-bot.coves.social",
+      "displayName": "RSS News Aggregator",
+      "description": "...",
+      "aggregatorType": "social.coves.aggregator.types#rss",
+      "enabled": true,
+      "config": {...},
+      "createdAt": "2025-10-19T14:00:00Z"
+    }
+  ],
+  "cursor": "..."
+}
+```
+
+---
+
+### For Aggregators
+
+#### Existing: `social.coves.post.create`
+**Modified Behavior:** Now handles aggregator authentication
+
+**Authorization Flow:**
+1. Extract DID from JWT
+2. Check if DID is registered aggregator (query `aggregators` table)
+3. If aggregator:
+   - Validate authorization record exists for this community
+   - Check `enabled=true`
+   - Apply aggregator rate limits (e.g., 10 posts/hour)
+4. If regular user:
+   - Validate membership, bans, etc. (existing logic)
+5. Create post with `author = actorDID`
+
+**Rate Limits:**
+- Regular users: 20 posts/hour per community
+- Aggregators: 10 posts/hour per community (to prevent spam)
+
+---
+
+#### `social.coves.aggregator.getAuthorizations`
+Get list of communities that have authorized this aggregator
+
+**Input:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social",
+  "enabledOnly": true,
+  "limit": 100,
+  "cursor": "..."
+}
+```
+
+**Output:**
+```json
+{
+  "authorizations": [
+    {
+      "communityDid": "did:plc:gaming123",
+      "communityName": "Gaming News",
+      "enabled": true,
+      "config": {...},
+      "createdAt": "2025-10-19T14:00:00Z"
+    }
+  ],
+  "cursor": "..."
+}
+```
+
+**Use Case:** Aggregator queries this to know which communities to post to
+
+---
+
+### For Discovery
+
+#### `social.coves.aggregator.list`
+List all available aggregators
+
+**Input:**
+```json
+{
+  "type": "social.coves.aggregator.types#rss",
+  "limit": 50,
+  "cursor": "..."
+}
+```
+
+**Output:**
+```json
+{
+  "aggregators": [
+    {
+      "did": "did:web:rss-bot.coves.social",
+      "displayName": "RSS News Aggregator",
+      "description": "...",
+      "aggregatorType": "social.coves.aggregator.types#rss",
+      "avatar": "...",
+      "maintainer": "did:plc:coves-platform",
+      "sourceUrl": "https://github.com/coves-social/rss-aggregator"
+    }
+  ],
+  "cursor": "..."
+}
+```
+
+---
+
+#### `social.coves.aggregator.get`
+Get detailed information about a specific aggregator
+
+**Input:**
+```json
+{
+  "aggregatorDid": "did:web:rss-bot.coves.social"
+}
+```
+
+**Output:**
+```json
+{
+  "did": "did:web:rss-bot.coves.social",
+  "displayName": "RSS News Aggregator",
+  "description": "...",
+  "aggregatorType": "social.coves.aggregator.types#rss",
+  "configSchema": {...},
+  "sourceUrl": "...",
+  "maintainer": "...",
+  "stats": {
+    "communitiesUsing": 42,
+    "postsCreated": 1337,
+    "createdAt": "2025-10-19T12:00:00Z"
+  }
+}
+```
+
+---
+
+## Database Schema
+
+### `aggregators` Table
+Indexed aggregator service declarations from Jetstream
+
+```sql
+CREATE TABLE aggregators (
+  did TEXT PRIMARY KEY,
+  display_name TEXT NOT NULL,
+  description TEXT,
+  aggregator_type TEXT NOT NULL,
+  config_schema JSONB,
+  avatar_url TEXT,
+  source_url TEXT,
+  maintainer_did TEXT,
+
+  -- Indexing metadata
+  record_uri TEXT NOT NULL,
+  record_cid TEXT NOT NULL,
+  indexed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+
+  -- Stats (cached)
+  communities_using INTEGER NOT NULL DEFAULT 0,
+  posts_created BIGINT NOT NULL DEFAULT 0,
+
+  CONSTRAINT aggregators_type_check CHECK (
+    aggregator_type IN (
+      'social.coves.aggregator.types#rss',
+      'social.coves.aggregator.types#blueskyMirror',
+      'social.coves.aggregator.types#sports',
+      'social.coves.aggregator.types#media',
+      'social.coves.aggregator.types#custom'
+    )
+  )
+);
+
+CREATE INDEX idx_aggregators_type ON aggregators(aggregator_type);
+CREATE INDEX idx_aggregators_indexed_at ON aggregators(indexed_at DESC);
+```
+
+---
+
+### `aggregator_authorizations` Table
+Indexed authorization records from communities
+
+```sql
+CREATE TABLE aggregator_authorizations (
+  id BIGSERIAL PRIMARY KEY,
+
+  -- Authorization identity
+  aggregator_did TEXT NOT NULL REFERENCES aggregators(did) ON DELETE CASCADE,
+  community_did TEXT NOT NULL,
+
+  -- Authorization state
+  enabled BOOLEAN NOT NULL DEFAULT true,
+  config JSONB,
+
+  -- Audit trail
+  created_at TIMESTAMPTZ NOT NULL,
+  created_by TEXT NOT NULL, -- DID of moderator
+  disabled_at TIMESTAMPTZ,
+  disabled_by TEXT, -- DID of moderator
+
+  -- atProto record metadata
+  record_uri TEXT NOT NULL UNIQUE,
+  record_cid TEXT NOT NULL,
+  indexed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+
+  UNIQUE(aggregator_did, community_did)
+);
+
+CREATE INDEX idx_aggregator_auth_agg_did ON aggregator_authorizations(aggregator_did) WHERE enabled = true;
+CREATE INDEX idx_aggregator_auth_comm_did ON aggregator_authorizations(community_did) WHERE enabled = true;
+CREATE INDEX idx_aggregator_auth_enabled ON aggregator_authorizations(enabled);
+```
+
+---
+
+### `aggregator_posts` Table
+Track posts created by aggregators (for rate limiting and stats)
+
+```sql
+CREATE TABLE aggregator_posts (
+  id BIGSERIAL PRIMARY KEY,
+
+  aggregator_did TEXT NOT NULL REFERENCES aggregators(did) ON DELETE CASCADE,
+  community_did TEXT NOT NULL,
+  post_uri TEXT NOT NULL,
+  post_cid TEXT NOT NULL,
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+
+  UNIQUE(post_uri)
+);
+
+CREATE INDEX idx_aggregator_posts_agg_did_created ON aggregator_posts(aggregator_did, created_at DESC);
+CREATE INDEX idx_aggregator_posts_comm_did_created ON aggregator_posts(community_did, created_at DESC);
+
+-- For rate limiting: count posts in last hour
+CREATE INDEX idx_aggregator_posts_rate_limit ON aggregator_posts(aggregator_did, community_did, created_at DESC);
+```
+
+---
+
+## Implementation Plan
+
+### Phase 1: Core Infrastructure (Coves AppView)
+
+**Goal:** Enable aggregator authentication and authorization
+
+#### 1.1 Database Setup
+- [ ] Create migration for `aggregators` table
+- [ ] Create migration for `aggregator_authorizations` table
+- [ ] Create migration for `aggregator_posts` table
+
+#### 1.2 Lexicon Definitions
+- [ ] Create `social.coves.aggregator.service.json`
+- [ ] Create `social.coves.aggregator.authorization.json`
+- [ ] Create `social.coves.aggregator.types.json`
+- [ ] Generate Go types from lexicons
+
+#### 1.3 Repository Layer
+```go
+// internal/core/aggregators/repository.go
+
+type Repository interface {
+    // Aggregator management
+    CreateAggregator(ctx context.Context, agg *Aggregator) error
+    GetAggregator(ctx context.Context, did string) (*Aggregator, error)
+    ListAggregators(ctx context.Context, filter AggregatorFilter) ([]*Aggregator, error)
+    UpdateAggregatorStats(ctx context.Context, did string, stats Stats) error
+
+    // Authorization management
+    CreateAuthorization(ctx context.Context, auth *Authorization) error
+    GetAuthorization(ctx context.Context, aggDID, commDID string) (*Authorization, error)
+    ListAuthorizationsForAggregator(ctx context.Context, aggDID string, enabledOnly bool) ([]*Authorization, error)
+    ListAuthorizationsForCommunity(ctx context.Context, commDID string) ([]*Authorization, error)
+    UpdateAuthorization(ctx context.Context, auth *Authorization) error
+    IsAuthorized(ctx context.Context, aggDID, commDID string) (bool, error)
+
+    // Post tracking (for rate limiting)
+    RecordAggregatorPost(ctx context.Context, aggDID, commDID, postURI string) error
+    CountRecentPosts(ctx context.Context, aggDID, commDID string, since time.Time) (int, error)
+}
+```
+
+#### 1.4 Service Layer
+```go
+// internal/core/aggregators/service.go
+
+type Service interface {
+    // For communities (moderators)
+    EnableAggregator(ctx context.Context, commDID, aggDID string, config map[string]interface{}) (*Authorization, error)
+    DisableAggregator(ctx context.Context, commDID, aggDID string) error
+    UpdateAggregatorConfig(ctx context.Context, commDID, aggDID string, config map[string]interface{}) error
+    ListCommunityAggregators(ctx context.Context, commDID string, enabledOnly bool) ([]*AggregatorInfo, error)
+
+    // For aggregators
+    GetAuthorizedCommunities(ctx context.Context, aggDID string) ([]*CommunityAuth, error)
+
+    // For discovery
+    ListAggregators(ctx context.Context, filter AggregatorFilter) ([]*Aggregator, error)
+    GetAggregator(ctx context.Context, did string) (*AggregatorDetail, error)
+
+    // Internal: called by post creation handler
+    ValidateAggregatorPost(ctx context.Context, aggDID, commDID string) error
+}
+```
+
+#### 1.5 Modify Post Creation Handler
+```go
+// internal/api/handlers/post/create.go
+
+func CreatePost(ctx context.Context, input *CreatePostInput) (*CreatePostOutput, error) {
+    actorDID := GetDIDFromAuth(ctx)
+
+    // Check if actor is an aggregator
+    if isAggregator, _ := aggregatorService.IsAggregator(ctx, actorDID); isAggregator {
+        // Validate aggregator authorization
+        if err := aggregatorService.ValidateAggregatorPost(ctx, actorDID, input.Community); err != nil {
+            return nil, err
+        }
+
+        // Apply aggregator rate limits
+        if err := rateLimitAggregator(ctx, actorDID, input.Community); err != nil {
+            return nil, ErrRateLimitExceeded
+        }
+    } else {
+        // Regular user validation (existing logic)
+        // ... membership checks, ban checks, etc.
+    }
+
+    // Create post (author will be actorDID - either user or aggregator)
+    post, err := postService.CreatePost(ctx, actorDID, input)
+    if err != nil {
+        return nil, err
+    }
+
+    // If aggregator, track the post
+    if isAggregator {
+        _ = aggregatorService.RecordPost(ctx, actorDID, input.Community, post.URI)
+    }
+
+    return post, nil
+}
+```
+
+#### 1.6 XRPC Handlers
+- [ ] `social.coves.aggregator.enable` handler
+- [ ] `social.coves.aggregator.disable` handler
+- [ ] `social.coves.aggregator.updateConfig` handler
+- [ ] `social.coves.aggregator.listForCommunity` handler
+- [ ] `social.coves.aggregator.getAuthorizations` handler
+- [ ] `social.coves.aggregator.list` handler
+- [ ] `social.coves.aggregator.get` handler
+
+#### 1.7 Jetstream Consumer
+```go
+// internal/atproto/jetstream/aggregator_consumer.go
+
+func (c *AggregatorConsumer) HandleEvent(ctx context.Context, evt *jetstream.Event) error {
+    switch evt.Collection {
+    case "social.coves.aggregator.service":
+        switch evt.Operation {
+        case "create", "update":
+            return c.indexAggregatorService(ctx, evt)
+        case "delete":
+            return c.deleteAggregator(ctx, evt.DID)
+        }
+
+    case "social.coves.aggregator.authorization":
+        switch evt.Operation {
+        case "create", "update":
+            return c.indexAuthorization(ctx, evt)
+        case "delete":
+            return c.deleteAuthorization(ctx, evt.URI)
+        }
+    }
+    return nil
+}
+```
+
+#### 1.8 Integration Tests
+- [ ] Test aggregator service indexing from Jetstream
+- [ ] Test authorization record indexing
+- [ ] Test `social.coves.post.create` with aggregator auth
+- [ ] Test authorization validation (enabled/disabled)
+- [ ] Test rate limiting for aggregators
+- [ ] Test config validation against schema
+
+**Milestone:** Aggregators can authenticate and post to communities with authorization
+
+---
+
+### Phase 2: Aggregator SDK (Go)
+
+**Goal:** Provide SDK for building aggregators easily
+
+#### 2.1 SDK Core
+```go
+// github.com/coves-social/aggregator-sdk-go
+
+package aggregator
+
+type Aggregator interface {
+    // Identity
+    GetDID() string
+    GetDisplayName() string
+    GetDescription() string
+    GetType() string
+    GetConfigSchema() map[string]interface{}
+
+    // Lifecycle
+    Start(ctx context.Context) error
+    Stop() error
+
+    // Posting (provided by SDK)
+    CreatePost(ctx context.Context, communityDID string, post Post) error
+    GetAuthorizedCommunities(ctx context.Context) ([]*CommunityAuth, error)
+}
+
+type BaseAggregator struct {
+    DID          string
+    DisplayName  string
+    Description  string
+    Type         string
+    PrivateKey   crypto.PrivateKey
+    CovesAPIURL  string
+
+    client *http.Client
+}
+
+type Post struct {
+    Title          string
+    Content        string
+    Embed          interface{}
+    FederatedFrom  *FederatedSource
+    ContentLabels  []string
+}
+
+type FederatedSource struct {
+    Platform           string // "rss", "bluesky", etc.
+    URI                string
+    ID                 string
+    OriginalCreatedAt  time.Time
+}
+
+// Helper methods provided by SDK
+func (a *BaseAggregator) CreatePost(ctx context.Context, communityDID string, post Post) error {
+    // 1. Sign JWT with aggregator's private key
+    token := a.signJWT()
+
+    // 2. Call social.coves.post.create via XRPC
+    resp, err := a.client.Post(
+        a.CovesAPIURL + "/xrpc/social.coves.post.create",
+        &CreatePostInput{
+            Community:     communityDID,
+            Title:         post.Title,
+            Content:       post.Content,
+            Embed:         post.Embed,
+            FederatedFrom: post.FederatedFrom,
+            ContentLabels: post.ContentLabels,
+        },
+        &CreatePostOutput{},
+        WithAuth(token),
+    )
+
+    return err
+}
+
+func (a *BaseAggregator) GetAuthorizedCommunities(ctx context.Context) ([]*CommunityAuth, error) {
+    // Call social.coves.aggregator.getAuthorizations
+    token := a.signJWT()
+
+    resp, err := a.client.Get(
+        a.CovesAPIURL + "/xrpc/social.coves.aggregator.getAuthorizations",
+        map[string]string{"aggregatorDid": a.DID, "enabledOnly": "true"},
+        &GetAuthorizationsOutput{},
+        WithAuth(token),
+    )
+
+    return resp.Authorizations, err
+}
+```
+
+#### 2.2 SDK Documentation
+- [ ] README with quickstart guide
+- [ ] Example aggregators (RSS, Bluesky mirror)
+- [ ] API reference documentation
+- [ ] Configuration schema guide
+
+**Milestone:** Third parties can build aggregators using SDK
+
+---
+
+### Phase 3: Reference Aggregator (RSS)
+
+**Goal:** Build working RSS aggregator as reference implementation
+
+#### 3.1 RSS Aggregator Implementation
+```go
+// github.com/coves-social/rss-aggregator
+
+package main
+
+import "github.com/coves-social/aggregator-sdk-go"
+
+type RSSAggregator struct {
+    *aggregator.BaseAggregator
+
+    // RSS-specific config
+    pollInterval time.Duration
+    llmClient    *openai.Client
+}
+
+func (r *RSSAggregator) Start(ctx context.Context) error {
+    // 1. Get authorized communities
+    communities, err := r.GetAuthorizedCommunities(ctx)
+    if err != nil {
+        return err
+    }
+
+    // 2. Start polling loop
+    ticker := time.NewTicker(r.pollInterval)
+    defer ticker.Stop()
+
+    for {
+        select {
+        case <-ticker.C:
+            r.pollFeeds(ctx, communities)
+        case <-ctx.Done():
+            return nil
+        }
+    }
+}
+
+func (r *RSSAggregator) pollFeeds(ctx context.Context, communities []*CommunityAuth) {
+    for _, comm := range communities {
+        // Get RSS feeds from community config
+        feeds := comm.Config["feeds"].([]string)
+
+        for _, feedURL := range feeds {
+            items, err := r.fetchFeed(feedURL)
+            if err != nil {
+                continue
+            }
+
+            // Process new items
+            for _, item := range items {
+                // Check if already posted
+                if r.alreadyPosted(item.GUID) {
+                    continue
+                }
+
+                // LLM deduplication logic
+                duplicate := r.findDuplicate(item, comm.CommunityDID)
+                if duplicate != nil {
+                    r.addToMegathread(duplicate, item)
+                    continue
+                }
+
+                // Create new post
+                post := aggregator.Post{
+                    Title:   item.Title,
+                    Content: r.summarize(item),
+                    FederatedFrom: &aggregator.FederatedSource{
+                        Platform:          "rss",
+                        URI:               item.Link,
+                        OriginalCreatedAt: item.PublishedAt,
+                    },
+                }
+
+                err = r.CreatePost(ctx, comm.CommunityDID, post)
+                if err != nil {
+                    log.Printf("Failed to create post: %v", err)
+                    continue
+                }
+
+                r.markPosted(item.GUID)
+            }
+        }
+    }
+}
+
+func (r *RSSAggregator) summarize(item *RSSItem) string {
+    // Use LLM to create unbiased summary
+    prompt := fmt.Sprintf("Summarize this news article in 2-3 sentences: %s", item.Description)
+    summary, _ := r.llmClient.Complete(prompt)
+    return summary
+}
+
+func (r *RSSAggregator) findDuplicate(item *RSSItem, communityDID string) *Post {
+    // Use LLM to detect semantic duplicates
+    // Query recent posts in community
+    // Compare with embeddings/similarity
+    return nil // or duplicate post
+}
+```
+
+#### 3.2 Deployment
+- [ ] Dockerfile for RSS aggregator
+- [ ] Kubernetes manifests (for Coves-hosted instance)
+- [ ] Environment configuration guide
+- [ ] Monitoring and logging setup
+
+#### 3.3 Testing
+- [ ] Unit tests for feed parsing
+- [ ] Integration tests with mock Coves API
+- [ ] E2E test with real Coves instance
+- [ ] LLM deduplication accuracy tests
+
+**Milestone:** RSS aggregator running in production for select communities
+
+---
+
+### Phase 4: Additional Aggregators
+
+#### 4.1 Bluesky Mirror Aggregator
+- [ ] Monitor Jetstream for specific users/hashtags
+- [ ] Preserve `originalAuthor` metadata
+- [ ] Link back to original Bluesky post
+- [ ] Rate limiting (don't flood community)
+
+#### 4.2 Sports Aggregator
+- [ ] Integrate with ESPN/TheSportsDB APIs
+- [ ] Monitor game completions
+- [ ] Create post-game threads with stats
+- [ ] Auto-pin major games
+
+#### 4.3 Media (TV/Movie) Aggregator
+- [ ] Integrate with TMDB API
+- [ ] Track show release schedules
+- [ ] Create episode discussion threads
+- [ ] Spoiler protection tags
+
+**Milestone:** Multiple official aggregators available for communities
+
+---
+
+## Security Considerations
+
+### Authentication
+✅ **DID-based Authentication**
+- Aggregators sign JWTs with their private keys
+- Server validates JWT signature against DID document
+- No shared secrets or API keys
+
+✅ **Scoped Authorization**
+- Authorization records are per-community
+- Aggregator can only post to authorized communities
+- Communities can revoke at any time
+
+### Rate Limiting
+✅ **Per-Aggregator Limits**
+- 10 posts/hour per community (configurable)
+- Prevents aggregator spam
+- Separate from user rate limits
+
+✅ **Global Limits**
+- Total posts across all communities: 100/hour
+- Prevents runaway aggregators
+
+### Content Validation
+✅ **Community Rules**
+- Aggregator posts validated against community content rules
+- No special exemptions (same rules as users)
+- Community can ban specific content patterns
+
+✅ **Config Validation**
+- Authorization config validated against aggregator's configSchema
+- Prevents injection attacks via config
+- JSON schema validation
+
+### Monitoring & Auditing
+✅ **Audit Trail**
+- All aggregator posts logged
+- `created_by` tracks which moderator authorized
+- `disabled_by` tracks who revoked access
+- Full history preserved
+
+✅ **Abuse Detection**
+- Monitor for spam patterns
+- Alert if aggregator posts rejected repeatedly
+- Auto-disable after threshold violations
+
+### Transparency
+✅ **Open Source**
+- Official aggregators open source
+- Source URL in service declaration
+- Community can audit behavior
+
+✅ **Attribution**
+- Posts clearly show aggregator authorship
+- UI shows "🤖 Posted by [Aggregator Name]"
+- No attempt to impersonate users
+
+---
+
+## UI/UX Considerations
+
+### Community Settings
+**Aggregator Management Page:**
+- List of available aggregators (with descriptions, types)
+- "Enable" button opens config modal
+- Config form generated from aggregator's configSchema
+- Toggle to enable/disable without deleting config
+- Stats: posts created, last active
+
+**Post Display:**
+- Posts from aggregators have bot badge: "🤖"
+- Shows aggregator name (e.g., "Posted by RSS News Bot")
+- `federatedFrom` shows original source
+- Link to original content (RSS article, Bluesky post, etc.)
+
+### User Preferences
+- Option to hide all aggregator posts
+- Option to hide specific aggregators
+- Filter posts by "user-created only" or "include bots"
+
+---
+
+## Success Metrics
+
+### Pre-Launch Checklist
+- [ ] Lexicons defined and validated
+- [ ] Database migrations tested
+- [ ] Jetstream consumer indexes aggregator records
+- [ ] Post creation handler validates aggregator auth
+- [ ] Rate limiting prevents spam
+- [ ] SDK published and documented
+- [ ] Reference RSS aggregator working
+- [ ] E2E tests passing
+- [ ] Security audit completed
+
+### Alpha Goals
+- 3+ official aggregators (RSS, Bluesky mirror, sports)
+- 10+ communities using aggregators
+- < 0.1% spam posts (false positives)
+- Aggregator posts appear in feed within 1 minute
+
+### Beta Goals
+- Third-party aggregators launched
+- 50+ communities using aggregators
+- Developer documentation complete
+- Marketplace/directory for discovery
+
+---
+
+## Out of Scope (Future Versions)
+
+### Aggregator Marketplace
+- [ ] Community ratings/reviews for aggregators
+- [ ] Featured aggregators
+- [ ] Paid aggregators (premium features)
+- [ ] Aggregator analytics dashboard
+
+### Advanced Features
+- [ ] Scheduled posts (post at specific time)
+- [ ] Content moderation integration (auto-label NSFW)
+- [ ] Multi-community posting (single post to multiple communities)
+- [ ] Interactive aggregators (respond to comments)
+- [ ] Aggregator-to-aggregator communication (chains)
+
+### Federation
+- [ ] Cross-instance aggregator discovery
+- [ ] Aggregator migration (change hosting provider)
+- [ ] Federated aggregator authorization (trust other instances' aggregators)
+
+---
+
+## Technical Decisions Log
+
+### 2025-10-19: Reuse `social.coves.post.create` Endpoint
+
+**Decision:** Aggregators use existing post creation endpoint, not a separate `social.coves.aggregator.post.create`
+
+**Rationale:**
+- Post record already server-populates `author` field from JWT
+- Aggregators authenticate as themselves → `author = aggregator DID`
+- Simpler: one code path for all post creation
+- Follows atProto principle: actors are actors (users, bots, aggregators)
+- `federatedFrom` field already handles external content attribution
+
+**Implementation:**
+- Add authorization check to `social.coves.post.create` handler
+- Check if authenticated DID is aggregator
+- Validate authorization record exists and enabled
+- Apply aggregator-specific rate limits
+- Otherwise same logic as user posts
+
+**Trade-offs Accepted:**
+- Post creation handler has branching logic (user vs aggregator)
+- But: keeps lexicon simple, reuses existing validation
+
+---
+
+### 2025-10-19: Hybrid Hosting Model
+
+**Decision:** Support both Coves-hosted and third-party aggregators
+
+**Rationale:**
+- Coves can provide high-quality official aggregators (RSS, sports, media)
+- Third parties can build specialized aggregators (niche communities)
+- SDK makes it easy to build custom aggregators
+- Follows feed generator model (anyone can run one)
+- Decentralization-friendly
+
+**Requirements:**
+- SDK must be well-documented and maintained
+- Authorization system must be DID-agnostic (works for any DID)
+- Discovery system shows all aggregators (official + third-party)
+
+---
+
+### 2025-10-19: Config as JSON Schema
+
+**Decision:** Aggregators declare configSchema in their service record
+
+**Rationale:**
+- Communities need to know what config options are available
+- JSON Schema is standard, well-supported
+- Enables UI auto-generation (forms from schema)
+- Validation at authorization creation time
+- Flexible: each aggregator can have different config structure
+
+**Example:**
+```json
+{
+  "configSchema": {
+    "type": "object",
+    "properties": {
+      "feeds": {
+        "type": "array",
+        "items": { "type": "string", "format": "uri" },
+        "description": "RSS feed URLs to monitor"
+      },
+      "topics": {
+        "type": "array",
+        "items": { "type": "string" },
+        "description": "Topics to filter posts by"
+      }
+    },
+    "required": ["feeds"]
+  }
+}
+```
+
+**Trade-offs Accepted:**
+- More complex than simple key-value config
+- But: better UX (self-documenting), prevents errors
+
+---
+
+## References
+
+- atProto Lexicon Spec: https://atproto.com/specs/lexicon
+- Feed Generator Starter Kit: https://github.com/bluesky-social/feed-generator
+- Labeler Implementation: https://github.com/bluesky-social/atproto/tree/main/packages/ozone
+- JSON Schema Spec: https://json-schema.org/
+- Coves Communities PRD: [PRD_COMMUNITIES.md](PRD_COMMUNITIES.md)
+- Coves Posts Implementation: [IMPLEMENTATION_POST_CREATION.md](IMPLEMENTATION_POST_CREATION.md)
diff --git a/docs/aggregators/PRD_KAGI_NEWS_RSS.md b/docs/aggregators/PRD_KAGI_NEWS_RSS.md
new file mode 100644
index 0000000..0a4f2e5
--- /dev/null
+++ b/docs/aggregators/PRD_KAGI_NEWS_RSS.md
@@ -0,0 +1,1294 @@
+# Kagi News RSS Aggregator PRD
+
+**Status:** Planning Phase
+**Owner:** Platform Team
+**Last Updated:** 2025-10-20
+**Parent PRD:** [PRD_AGGREGATORS.md](PRD_AGGREGATORS.md)
+
+## Overview
+
+The Kagi News RSS Aggregator is a reference implementation of the Coves aggregator system that automatically posts high-quality, multi-source news summaries to communities. It leverages Kagi News's free RSS feeds to provide pre-aggregated, deduped news content with multiple perspectives and source citations.
+
+**Key Value Propositions:**
+- **Multi-source aggregation**: Kagi News already aggregates multiple sources per story
+- **Balanced perspectives**: Built-in perspective tracking from different outlets
+- **Rich metadata**: Categories, highlights, source links included
+- **Legal & free**: CC BY-NC licensed for non-commercial use
+- **Low complexity**: No LLM deduplication needed (Kagi does it)
+
+## Data Source: Kagi News RSS Feeds
+
+### Licensing & Legal
+
+**License:** CC BY-NC (Creative Commons Attribution-NonCommercial)
+
+**Terms:**
+- ✅ **Free for non-commercial use** (Coves qualifies)
+- ✅ **Attribution required** (must credit Kagi News)
+- ❌ **Cannot use commercially** (must contact support@kagi.com for commercial license)
+- ✅ **Data can be shared** (with same attribution + NC requirements)
+
+**Source:** https://news.kagi.com/about
+
+**Quote from Kagi:**
+> Note that kite.json and files referenced by it are licensed under CC BY-NC license. This means that this data can be used free of charge (with attribution and for non-commercial use). If you would like to license this data for commercial use let us know through support@kagi.com.
+
+**Compliance Requirements:**
+- Visible attribution to Kagi News on every post
+- Link back to original Kagi story page
+- Non-commercial operation (met: Coves is non-commercial)
+
+---
+
+### RSS Feed Structure
+
+**Base URL Pattern:** `https://news.kagi.com/{category}.xml`
+
+**Known Categories:**
+- `world.xml` - World news
+- `tech.xml` - Technology (likely)
+- `business.xml` - Business (likely)
+- `sports.xml` - Sports (likely)
+- Additional categories TBD (need to scrape homepage)
+
+**Feed Format:** RSS 2.0 (standard XML)
+
+**Update Frequency:** One daily update (~noon UTC)
+
+---
+
+### RSS Item Schema
+
+Each `<item>` in the feed contains:
+
+```xml
+<item>
+  <title>Story headline</title>
+  <link>https://kite.kagi.com/{uuid}/{category}/{id}</link>
+  <description>Full HTML content (see below)</description>
+  <guid isPermaLink="true">https://kite.kagi.com/{uuid}/{category}/{id}</guid>
+  <category>Primary category (e.g., "World")</category>
+  <category>Subcategory (e.g., "World/Conflict & Security")</category>
+  <category>Tag (e.g., "Conflict & Security")</category>
+  <pubDate>Mon, 20 Oct 2025 01:46:31 +0000</pubDate>
+</item>
+```
+
+**Description HTML Structure:**
+```html
+<p>Main summary paragraph with inline source citations [source1.com#1][source2.com#1]</p>
+
+<img src='https://kagiproxy.com/img/...' alt='Image caption' />
+
+<h3>Highlights:</h3>
+<ul>
+  <li>Key point 1 with [source.com#1] citations</li>
+  <li>Key point 2...</li>
+</ul>
+
+<blockquote>Notable quote - Person Name</blockquote>
+
+<h3>Perspectives:</h3>
+<ul>
+  <li>Viewpoint holder: Their perspective. (<a href='...'>Source</a>)</li>
+</ul>
+
+<h3>Sources:</h3>
+<ul>
+  <li><a href='https://...'>Article title</a> - domain.com</li>
+</ul>
+```
+
+**Key Features:**
+- Multiple source citations inline
+- Balanced perspectives from different actors
+- Highlights extract key points
+- Direct quotes preserved
+- All sources linked with attribution
+
+---
+
+## Architecture
+
+### High-Level Flow
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│  Kagi News RSS Feeds (External)                             │
+│  - https://news.kagi.com/world.xml                          │
+│  - https://news.kagi.com/tech.xml                           │
+│  - etc.                                                     │
+└─────────────────────────────────────────────────────────────┘
+                            │
+                            │ HTTP GET one job after update
+                            ▼
+┌─────────────────────────────────────────────────────────────┐
+│  Kagi News Aggregator Service                               │
+│  DID: did:web:kagi-news.coves.social                        │
+│                                                             │
+│  Components:                                                 │
+│  1. Feed Poller: Fetches RSS feeds on schedule              │
+│  2. Item Parser: Extracts structured data from HTML         │
+│  3. Deduplication: Tracks posted GUIDs (no LLM needed)      │
+│  4. Category Mapper: Maps Kagi categories to communities    │
+│  5. Post Formatter: Converts to Coves post format           │
+│  6. Post Publisher: Calls social.coves.post.create          │
+└─────────────────────────────────────────────────────────────┘
+                            │
+                            │ Authenticated XRPC calls
+                            ▼
+┌─────────────────────────────────────────────────────────────┐
+│  Coves AppView (social.coves.post.create)                   │
+│  - Validates aggregator authorization                        │
+│  - Creates post with author = did:web:kagi-news.coves.social│
+│  - Indexes to community feeds                                │
+└─────────────────────────────────────────────────────────────┘
+```
+
+---
+
+### Aggregator Service Declaration
+
+```json
+{
+  "$type": "social.coves.aggregator.service",
+  "did": "did:web:kagi-news.coves.social",
+  "displayName": "Kagi News Aggregator",
+  "description": "Automatically posts breaking news from Kagi News RSS feeds. Kagi News aggregates multiple sources per story with balanced perspectives and comprehensive source citations.",
+  "aggregatorType": "social.coves.aggregator.types#rss",
+  "avatar": "<blob reference to Kagi logo>",
+  "configSchema": {
+    "type": "object",
+    "properties": {
+      "categories": {
+        "type": "array",
+        "items": {
+          "type": "string",
+          "enum": ["world", "tech", "business", "sports", "science"]
+        },
+        "description": "Kagi News categories to monitor",
+        "minItems": 1
+      },
+      "subcategoryFilter": {
+        "type": "array",
+        "items": { "type": "string" },
+        "description": "Optional: only post stories with these subcategories (e.g., 'World/Middle East', 'Tech/AI')"
+      },
+      "minSources": {
+        "type": "integer",
+        "minimum": 1,
+        "default": 2,
+        "description": "Minimum number of sources required for a story to be posted"
+      },
+      "includeImages": {
+        "type": "boolean",
+        "default": true,
+        "description": "Include images from Kagi proxy in posts"
+      },
+      "postFormat": {
+        "type": "string",
+        "enum": ["full", "summary", "minimal"],
+        "default": "full",
+        "description": "How much content to include: full (all sections), summary (main paragraph + sources), minimal (title + link only)"
+      }
+    },
+    "required": ["categories"]
+  },
+  "sourceUrl": "https://github.com/coves-social/kagi-news-aggregator",
+  "maintainer": "did:plc:coves-platform",
+  "createdAt": "2025-10-20T12:00:00Z"
+}
+```
+
+---
+
+## Community Configuration Examples
+
+### Example 1: World News Community
+
+```json
+{
+  "aggregatorDid": "did:web:kagi-news.coves.social",
+  "enabled": true,
+  "config": {
+    "categories": ["world"],
+    "minSources": 3,
+    "includeImages": true,
+    "postFormat": "full"
+  }
+}
+```
+
+**Result:** Posts all world news stories with 3+ sources, full content including images/highlights/perspectives.
+
+---
+
+### Example 2: AI/Tech Community (Filtered)
+
+```json
+{
+  "aggregatorDid": "did:web:kagi-news.coves.social",
+  "enabled": true,
+  "config": {
+    "categories": ["tech", "business"],
+    "subcategoryFilter": ["Tech/AI", "Tech/Machine Learning", "Business/Tech Industry"],
+    "minSources": 2,
+    "includeImages": true,
+    "postFormat": "full"
+  }
+}
+```
+
+**Result:** Only posts tech stories about AI/ML or tech industry business news with 2+ sources.
+
+---
+
+### Example 3: Breaking News (Minimal)
+
+```json
+{
+  "aggregatorDid": "did:web:kagi-news.coves.social",
+  "enabled": true,
+  "config": {
+    "categories": ["world", "business", "tech"],
+    "minSources": 5,
+    "includeImages": false,
+    "postFormat": "minimal"
+  }
+}
+```
+
+**Result:** Only major stories (5+ sources), minimal format (headline + link), no images.
+
+---
+
+## Post Format Specification
+
+### Post Record Structure
+
+```json
+{
+  "$type": "social.coves.post.record",
+  "author": "did:web:kagi-news.coves.social",
+  "community": "did:plc:worldnews123",
+  "title": "{Kagi story title}",
+  "content": "{formatted content based on postFormat config}",
+  "embed": {
+    "$type": "app.bsky.embed.external",
+    "external": {
+      "uri": "https://kite.kagi.com/{uuid}/{category}/{id}",
+      "title": "{story title}",
+      "description": "{summary excerpt}",
+      "thumb": "{image blob if includeImages=true}"
+    }
+  },
+  "federatedFrom": {
+    "platform": "kagi-news-rss",
+    "uri": "https://kite.kagi.com/{uuid}/{category}/{id}",
+    "id": "{guid}",
+    "originalCreatedAt": "{pubDate from RSS}"
+  },
+  "contentLabels": [
+    "{primary category}",
+    "{subcategories}"
+  ],
+  "createdAt": "{current timestamp}"
+}
+```
+
+---
+
+### Content Formatting by `postFormat`
+
+#### Format: `full` (Default)
+
+```markdown
+{Main summary paragraph with source citations}
+
+**Highlights:**
+• {Bullet point 1}
+• {Bullet point 2}
+• ...
+
+**Perspectives:**
+• **{Actor}**: {Their perspective} ([Source]({url}))
+• ...
+
+> {Notable quote} — {Attribution}
+
+**Sources:**
+• [{Title}]({url}) - {domain}
+• ...
+
+---
+📰 Story aggregated by [Kagi News]({kagi_story_url})
+```
+
+**Rationale:** Preserves Kagi's rich multi-source analysis, provides maximum value.
+
+---
+
+#### Format: `summary`
+
+```markdown
+{Main summary paragraph with source citations}
+
+**Sources:**
+• [{Title}]({url}) - {domain}
+• ...
+
+---
+📰 Story aggregated by [Kagi News]({kagi_story_url})
+```
+
+**Rationale:** Clean summary with source links, less overwhelming.
+
+---
+
+#### Format: `minimal`
+
+```markdown
+{Story title}
+
+Read more: {kagi_story_url}
+
+**Sources:** {domain1}, {domain2}, {domain3}...
+
+---
+📰 Via [Kagi News]({kagi_story_url})
+```
+
+**Rationale:** Just headlines with link, for high-volume communities or breaking news alerts.
+
+---
+
+## Implementation Details
+
+### Component 1: Feed Poller
+
+**Responsibility:** Fetch RSS feeds on schedule
+
+```go
+type FeedPoller struct {
+    categories   []string
+    pollInterval time.Duration
+    httpClient   *http.Client
+}
+
+func (p *FeedPoller) Start(ctx context.Context) error {
+    ticker := time.NewTicker(p.pollInterval) // 15 minutes
+    defer ticker.Stop()
+
+    for {
+        select {
+        case <-ticker.C:
+            for _, category := range p.categories {
+                feedURL := fmt.Sprintf("https://news.kagi.com/%s.xml", category)
+                feed, err := p.fetchFeed(feedURL)
+                if err != nil {
+                    log.Printf("Failed to fetch %s: %v", feedURL, err)
+                    continue
+                }
+                p.handleFeed(ctx, category, feed)
+            }
+        case <-ctx.Done():
+            return nil
+        }
+    }
+}
+
+func (p *FeedPoller) fetchFeed(url string) (*gofeed.Feed, error) {
+    parser := gofeed.NewParser()
+    feed, err := parser.ParseURL(url)
+    return feed, err
+}
+```
+
+**Libraries:**
+- `github.com/mmcdole/gofeed` - RSS/Atom parser
+
+---
+
+### Component 2: Item Parser
+
+**Responsibility:** Extract structured data from RSS item HTML
+
+```go
+type KagiStory struct {
+    Title             string
+    Link              string
+    GUID              string
+    PubDate           time.Time
+    Categories        []string
+
+    // Parsed from HTML description
+    Summary           string
+    Highlights        []string
+    Perspectives      []Perspective
+    Quote             *Quote
+    Sources           []Source
+    ImageURL          string
+    ImageAlt          string
+}
+
+type Perspective struct {
+    Actor       string
+    Description string
+    SourceURL   string
+}
+
+type Quote struct {
+    Text        string
+    Attribution string
+}
+
+type Source struct {
+    Title  string
+    URL    string
+    Domain string
+}
+
+func (p *ItemParser) Parse(item *gofeed.Item) (*KagiStory, error) {
+    doc, err := goquery.NewDocumentFromReader(strings.NewReader(item.Description))
+    if err != nil {
+        return nil, err
+    }
+
+    story := &KagiStory{
+        Title:      item.Title,
+        Link:       item.Link,
+        GUID:       item.GUID,
+        PubDate:    *item.PublishedParsed,
+        Categories: item.Categories,
+    }
+
+    // Extract summary (first <p> tag)
+    story.Summary = doc.Find("p").First().Text()
+
+    // Extract highlights
+    doc.Find("h3:contains('Highlights')").Next("ul").Find("li").Each(func(i int, s *goquery.Selection) {
+        story.Highlights = append(story.Highlights, s.Text())
+    })
+
+    // Extract perspectives
+    doc.Find("h3:contains('Perspectives')").Next("ul").Find("li").Each(func(i int, s *goquery.Selection) {
+        text := s.Text()
+        link := s.Find("a").First()
+        sourceURL, _ := link.Attr("href")
+
+        // Parse format: "Actor: Description (Source)"
+        parts := strings.SplitN(text, ":", 2)
+        if len(parts) == 2 {
+            story.Perspectives = append(story.Perspectives, Perspective{
+                Actor:       strings.TrimSpace(parts[0]),
+                Description: strings.TrimSpace(parts[1]),
+                SourceURL:   sourceURL,
+            })
+        }
+    })
+
+    // Extract quote
+    doc.Find("blockquote").Each(func(i int, s *goquery.Selection) {
+        text := s.Text()
+        parts := strings.Split(text, " - ")
+        if len(parts) == 2 {
+            story.Quote = &Quote{
+                Text:        strings.TrimSpace(parts[0]),
+                Attribution: strings.TrimSpace(parts[1]),
+            }
+        }
+    })
+
+    // Extract sources
+    doc.Find("h3:contains('Sources')").Next("ul").Find("li").Each(func(i int, s *goquery.Selection) {
+        link := s.Find("a").First()
+        url, _ := link.Attr("href")
+        title := link.Text()
+        domain := extractDomain(s.Text())
+
+        story.Sources = append(story.Sources, Source{
+            Title:  title,
+            URL:    url,
+            Domain: domain,
+        })
+    })
+
+    // Extract image
+    img := doc.Find("img").First()
+    if img.Length() > 0 {
+        story.ImageURL, _ = img.Attr("src")
+        story.ImageAlt, _ = img.Attr("alt")
+    }
+
+    return story, nil
+}
+```
+
+**Libraries:**
+- `github.com/PuerkitoBio/goquery` - HTML parsing
+
+---
+
+### Component 3: Deduplication
+
+**Responsibility:** Track posted stories to prevent duplicates
+
+```go
+type Deduplicator struct {
+    db *sql.DB
+}
+
+func (d *Deduplicator) AlreadyPosted(guid string) (bool, error) {
+    var exists bool
+    err := d.db.QueryRow(`
+        SELECT EXISTS(
+            SELECT 1 FROM kagi_news_posted_stories
+            WHERE guid = $1
+        )
+    `, guid).Scan(&exists)
+    return exists, err
+}
+
+func (d *Deduplicator) MarkPosted(guid, postURI string) error {
+    _, err := d.db.Exec(`
+        INSERT INTO kagi_news_posted_stories (guid, post_uri, posted_at)
+        VALUES ($1, $2, NOW())
+        ON CONFLICT (guid) DO NOTHING
+    `, guid, postURI)
+    return err
+}
+```
+
+**Database Table:**
+```sql
+CREATE TABLE kagi_news_posted_stories (
+    guid TEXT PRIMARY KEY,
+    post_uri TEXT NOT NULL,
+    posted_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_kagi_posted_at ON kagi_news_posted_stories(posted_at DESC);
+```
+
+**Cleanup:** Periodic job deletes rows older than 30 days (Kagi unlikely to re-post old stories).
+
+---
+
+### Component 4: Category Mapper
+
+**Responsibility:** Map Kagi categories to authorized communities
+
+```go
+func (m *CategoryMapper) GetTargetCommunities(story *KagiStory) ([]*CommunityAuth, error) {
+    // Get all communities that have authorized this aggregator
+    allAuths, err := m.aggregator.GetAuthorizedCommunities(context.Background())
+    if err != nil {
+        return nil, err
+    }
+
+    var targets []*CommunityAuth
+    for _, auth := range allAuths {
+        if !auth.Enabled {
+            continue
+        }
+
+        config := auth.Config
+
+        // Check if story's primary category is in config.categories
+        primaryCategory := story.Categories[0]
+        if !contains(config["categories"], primaryCategory) {
+            continue
+        }
+
+        // Check subcategory filter (if specified)
+        if subcatFilter, ok := config["subcategoryFilter"].([]string); ok && len(subcatFilter) > 0 {
+            if !hasAnySubcategory(story.Categories, subcatFilter) {
+                continue
+            }
+        }
+
+        // Check minimum sources requirement
+        minSources := config["minSources"].(int)
+        if len(story.Sources) < minSources {
+            continue
+        }
+
+        targets = append(targets, auth)
+    }
+
+    return targets, nil
+}
+```
+
+---
+
+### Component 5: Post Formatter
+
+**Responsibility:** Convert Kagi story to Coves post format
+
+```go
+func (f *PostFormatter) Format(story *KagiStory, format string) string {
+    switch format {
+    case "full":
+        return f.formatFull(story)
+    case "summary":
+        return f.formatSummary(story)
+    case "minimal":
+        return f.formatMinimal(story)
+    default:
+        return f.formatFull(story)
+    }
+}
+
+func (f *PostFormatter) formatFull(story *KagiStory) string {
+    var buf strings.Builder
+
+    // Summary
+    buf.WriteString(story.Summary)
+    buf.WriteString("\n\n")
+
+    // Highlights
+    if len(story.Highlights) > 0 {
+        buf.WriteString("**Highlights:**\n")
+        for _, h := range story.Highlights {
+            buf.WriteString(fmt.Sprintf("• %s\n", h))
+        }
+        buf.WriteString("\n")
+    }
+
+    // Perspectives
+    if len(story.Perspectives) > 0 {
+        buf.WriteString("**Perspectives:**\n")
+        for _, p := range story.Perspectives {
+            buf.WriteString(fmt.Sprintf("• **%s**: %s ([Source](%s))\n", p.Actor, p.Description, p.SourceURL))
+        }
+        buf.WriteString("\n")
+    }
+
+    // Quote
+    if story.Quote != nil {
+        buf.WriteString(fmt.Sprintf("> %s — %s\n\n", story.Quote.Text, story.Quote.Attribution))
+    }
+
+    // Sources
+    buf.WriteString("**Sources:**\n")
+    for _, s := range story.Sources {
+        buf.WriteString(fmt.Sprintf("• [%s](%s) - %s\n", s.Title, s.URL, s.Domain))
+    }
+    buf.WriteString("\n")
+
+    // Attribution
+    buf.WriteString(fmt.Sprintf("---\n📰 Story aggregated by [Kagi News](%s)", story.Link))
+
+    return buf.String()
+}
+
+func (f *PostFormatter) formatSummary(story *KagiStory) string {
+    var buf strings.Builder
+
+    buf.WriteString(story.Summary)
+    buf.WriteString("\n\n**Sources:**\n")
+    for _, s := range story.Sources {
+        buf.WriteString(fmt.Sprintf("• [%s](%s) - %s\n", s.Title, s.URL, s.Domain))
+    }
+    buf.WriteString("\n")
+    buf.WriteString(fmt.Sprintf("---\n📰 Story aggregated by [Kagi News](%s)", story.Link))
+
+    return buf.String()
+}
+
+func (f *PostFormatter) formatMinimal(story *KagiStory) string {
+    sourceDomains := make([]string, len(story.Sources))
+    for i, s := range story.Sources {
+        sourceDomains[i] = s.Domain
+    }
+
+    return fmt.Sprintf(
+        "%s\n\nRead more: %s\n\n**Sources:** %s\n\n---\n📰 Via [Kagi News](%s)",
+        story.Title,
+        story.Link,
+        strings.Join(sourceDomains, ", "),
+        story.Link,
+    )
+}
+```
+
+---
+
+### Component 6: Post Publisher
+
+**Responsibility:** Create posts via Coves API
+
+```go
+func (p *PostPublisher) PublishStory(ctx context.Context, story *KagiStory, communities []*CommunityAuth) error {
+    for _, comm := range communities {
+        config := comm.Config
+
+        // Format content based on config
+        postFormat := config["postFormat"].(string)
+        content := p.formatter.Format(story, postFormat)
+
+        // Build embed
+        var embed *aggregator.Embed
+        if config["includeImages"].(bool) && story.ImageURL != "" {
+            // TODO: Handle image upload/blob creation
+            embed = &aggregator.Embed{
+                Type: "app.bsky.embed.external",
+                External: &aggregator.External{
+                    URI:         story.Link,
+                    Title:       story.Title,
+                    Description: truncate(story.Summary, 300),
+                    Thumb:       story.ImageURL, // or blob reference
+                },
+            }
+        }
+
+        // Create post
+        post := aggregator.Post{
+            Title:   story.Title,
+            Content: content,
+            Embed:   embed,
+            FederatedFrom: &aggregator.FederatedSource{
+                Platform:          "kagi-news-rss",
+                URI:               story.Link,
+                ID:                story.GUID,
+                OriginalCreatedAt: story.PubDate,
+            },
+            ContentLabels: story.Categories,
+        }
+
+        err := p.aggregator.CreatePost(ctx, comm.CommunityDID, post)
+        if err != nil {
+            log.Printf("Failed to create post in %s: %v", comm.CommunityDID, err)
+            continue
+        }
+
+        // Mark as posted
+        _ = p.deduplicator.MarkPosted(story.GUID, "post-uri-from-response")
+    }
+
+    return nil
+}
+```
+
+---
+
+## Image Handling Strategy
+
+### Initial Implementation (MVP)
+
+**Approach:** Use Kagi proxy URLs directly in embeds
+
+**Rationale:**
+- Simplest implementation
+- Kagi proxy likely allows hotlinking for non-commercial use
+- No storage costs
+- Images are already optimized by Kagi
+
+**Risk Mitigation:**
+- Monitor for broken images
+- Add fallback: if image fails to load, skip embed
+- Prepare migration plan to self-hosting if needed
+
+**Code:**
+```go
+if config["includeImages"].(bool) && story.ImageURL != "" {
+    // Use Kagi proxy URL directly
+    embed = &aggregator.Embed{
+        External: &aggregator.External{
+            Thumb: story.ImageURL, // https://kagiproxy.com/img/...
+        },
+    }
+}
+```
+
+---
+
+### Future Enhancement (If Issues Arise)
+
+**Approach:** Download and re-host images
+
+**Implementation:**
+1. Download image from Kagi proxy
+2. Upload to Coves blob storage (or S3/CDN)
+3. Use blob reference in embed
+
+**Code:**
+```go
+func (p *PostPublisher) uploadImage(imageURL string) (string, error) {
+    // Download from Kagi proxy
+    resp, err := http.Get(imageURL)
+    if err != nil {
+        return "", err
+    }
+    defer resp.Body.Close()
+
+    // Upload to blob storage
+    blob, err := p.blobStore.Upload(resp.Body, resp.Header.Get("Content-Type"))
+    if err != nil {
+        return "", err
+    }
+
+    return blob.Ref, nil
+}
+```
+
+**Decision Point:** Only implement if:
+- Kagi blocks hotlinking
+- Kagi proxy becomes unreliable
+- Legal clarification needed
+
+---
+
+## Rate Limiting & Performance
+
+### Rate Limits
+
+**RSS Fetching:**
+- Poll each category feed every 15 minutes
+- Max 4 categories = 4 requests per 15 min = 16 req/hour
+- Well within any reasonable limit
+
+**Post Creation:**
+- Aggregator rate limit: 10 posts/hour per community
+- Global limit: 100 posts/hour across all communities
+- Kagi News publishes ~5-10 stories per category per day
+- = ~20-40 posts/day total across all categories
+- = ~2-4 posts/hour average
+- Well within limits
+
+**Performance Targets:**
+- Story posted within 15 minutes of appearing in RSS feed
+- < 1 second to parse and format a story
+- < 500ms to publish a post via API
+
+---
+
+## Monitoring & Observability
+
+### Metrics to Track
+
+**Feed Polling:**
+- `kagi_feed_poll_total` (counter) - Total feed polls by category
+- `kagi_feed_poll_errors` (counter) - Failed polls by category/error
+- `kagi_feed_items_fetched` (gauge) - Items per poll by category
+- `kagi_feed_poll_duration_seconds` (histogram) - Poll latency
+
+**Story Processing:**
+- `kagi_stories_parsed_total` (counter) - Successfully parsed stories
+- `kagi_stories_parse_errors` (counter) - Parse failures by error type
+- `kagi_stories_filtered` (counter) - Stories filtered out by reason (duplicate, min sources, category)
+- `kagi_stories_posted` (counter) - Stories successfully posted by community
+
+**Post Publishing:**
+- `kagi_posts_created_total` (counter) - Total posts created
+- `kagi_posts_failed` (counter) - Failed posts by error type
+- `kagi_post_publish_duration_seconds` (histogram) - Post creation latency
+
+**Health:**
+- `kagi_aggregator_up` (gauge) - Service health (1 = healthy, 0 = down)
+- `kagi_last_successful_poll_timestamp` (gauge) - Last successful poll time by category
+
+---
+
+### Logging
+
+**Structured Logging:**
+```go
+log.Info("Story posted",
+    "guid", story.GUID,
+    "title", story.Title,
+    "community", comm.CommunityDID,
+    "post_uri", postURI,
+    "sources", len(story.Sources),
+    "format", postFormat,
+)
+
+log.Error("Failed to parse story",
+    "guid", item.GUID,
+    "feed", feedURL,
+    "error", err,
+)
+```
+
+**Log Levels:**
+- DEBUG: Feed items, parsing details
+- INFO: Stories posted, communities targeted
+- WARN: Parse errors, rate limit approaching
+- ERROR: Failed posts, feed fetch failures
+
+---
+
+### Alerts
+
+**Critical:**
+- Feed polling failing for > 1 hour
+- Post creation failing for > 10 consecutive attempts
+- Aggregator unauthorized (auth record disabled/deleted)
+
+**Warning:**
+- Post creation rate < 50% of expected
+- Parse errors > 10% of items
+- Approaching rate limits (> 80% of quota)
+
+---
+
+## Deployment
+
+### Infrastructure
+
+**Service Type:** Long-running daemon
+
+**Hosting:** Kubernetes (same cluster as Coves AppView)
+
+**Resources:**
+- CPU: 0.5 cores (low CPU usage, mostly I/O)
+- Memory: 512 MB (small in-memory cache for recent GUIDs)
+- Storage: 1 GB (SQLite for deduplication tracking)
+
+---
+
+### Configuration
+
+**Environment Variables:**
+```bash
+# Aggregator identity
+AGGREGATOR_DID=did:web:kagi-news.coves.social
+AGGREGATOR_PRIVATE_KEY_PATH=/secrets/private-key.pem
+
+# Coves API
+COVES_API_URL=https://api.coves.social
+
+# Feed polling
+POLL_INTERVAL=15m
+CATEGORIES=world,tech,business,sports
+
+# Database (for deduplication)
+DB_PATH=/data/kagi-news.db
+
+# Monitoring
+METRICS_PORT=9090
+LOG_LEVEL=info
+```
+
+---
+
+### Deployment Manifest
+
+```yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kagi-news-aggregator
+  namespace: coves
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: kagi-news-aggregator
+  template:
+    metadata:
+      labels:
+        app: kagi-news-aggregator
+    spec:
+      containers:
+      - name: aggregator
+        image: coves/kagi-news-aggregator:latest
+        env:
+        - name: AGGREGATOR_DID
+          value: did:web:kagi-news.coves.social
+        - name: COVES_API_URL
+          value: https://api.coves.social
+        - name: POLL_INTERVAL
+          value: 15m
+        - name: CATEGORIES
+          value: world,tech,business,sports
+        - name: DB_PATH
+          value: /data/kagi-news.db
+        - name: AGGREGATOR_PRIVATE_KEY_PATH
+          value: /secrets/private-key.pem
+        volumeMounts:
+        - name: data
+          mountPath: /data
+        - name: secrets
+          mountPath: /secrets
+          readOnly: true
+        ports:
+        - name: metrics
+          containerPort: 9090
+        resources:
+          requests:
+            cpu: 250m
+            memory: 256Mi
+          limits:
+            cpu: 500m
+            memory: 512Mi
+      volumes:
+      - name: data
+        persistentVolumeClaim:
+          claimName: kagi-news-data
+      - name: secrets
+        secret:
+          secretName: kagi-news-private-key
+```
+
+---
+
+## Testing Strategy
+
+### Unit Tests
+
+**Feed Parsing:**
+```go
+func TestParseFeed(t *testing.T) {
+    feed := loadTestFeed("testdata/world.xml")
+    stories, err := parser.Parse(feed)
+    assert.NoError(t, err)
+    assert.Len(t, stories, 10)
+
+    story := stories[0]
+    assert.NotEmpty(t, story.Title)
+    assert.NotEmpty(t, story.Summary)
+    assert.Greater(t, len(story.Sources), 1)
+}
+
+func TestParseStoryHTML(t *testing.T) {
+    html := `<p>Summary [source.com#1]</p>
+             <h3>Highlights:</h3>
+             <ul><li>Point 1</li></ul>
+             <h3>Sources:</h3>
+             <ul><li><a href="https://example.com">Title</a> - example.com</li></ul>`
+
+    story, err := parser.ParseHTML(html)
+    assert.NoError(t, err)
+    assert.Equal(t, "Summary [source.com#1]", story.Summary)
+    assert.Len(t, story.Highlights, 1)
+    assert.Len(t, story.Sources, 1)
+}
+```
+
+**Formatting:**
+```go
+func TestFormatFull(t *testing.T) {
+    story := &KagiStory{
+        Summary: "Test summary",
+        Sources: []Source{
+            {Title: "Article", URL: "https://example.com", Domain: "example.com"},
+        },
+    }
+
+    content := formatter.Format(story, "full")
+    assert.Contains(t, content, "Test summary")
+    assert.Contains(t, content, "**Sources:**")
+    assert.Contains(t, content, "📰 Story aggregated by")
+}
+```
+
+**Deduplication:**
+```go
+func TestDeduplication(t *testing.T) {
+    guid := "test-guid-123"
+
+    posted, err := deduplicator.AlreadyPosted(guid)
+    assert.NoError(t, err)
+    assert.False(t, posted)
+
+    err = deduplicator.MarkPosted(guid, "at://...")
+    assert.NoError(t, err)
+
+    posted, err = deduplicator.AlreadyPosted(guid)
+    assert.NoError(t, err)
+    assert.True(t, posted)
+}
+```
+
+---
+
+### Integration Tests
+
+**With Mock Coves API:**
+```go
+func TestPublishStory(t *testing.T) {
+    // Setup mock Coves API
+    mockAPI := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+        assert.Equal(t, "/xrpc/social.coves.post.create", r.URL.Path)
+
+        var input CreatePostInput
+        json.NewDecoder(r.Body).Decode(&input)
+
+        assert.Equal(t, "did:plc:test-community", input.Community)
+        assert.NotEmpty(t, input.Title)
+        assert.Contains(t, input.Content, "📰 Story aggregated by")
+
+        w.WriteHeader(200)
+        json.NewEncoder(w).Encode(CreatePostOutput{URI: "at://..."})
+    }))
+    defer mockAPI.Close()
+
+    // Test story publishing
+    publisher := NewPostPublisher(mockAPI.URL)
+    err := publisher.PublishStory(ctx, testStory, []*CommunityAuth{testComm})
+    assert.NoError(t, err)
+}
+```
+
+---
+
+### E2E Tests
+
+**With Real RSS Feed:**
+```go
+func TestE2E_FetchAndParse(t *testing.T) {
+    if testing.Short() {
+        t.Skip("Skipping E2E test")
+    }
+
+    // Fetch real Kagi News feed
+    feed, err := poller.fetchFeed("https://news.kagi.com/world.xml")
+    assert.NoError(t, err)
+    assert.NotEmpty(t, feed.Items)
+
+    // Parse first item
+    story, err := parser.Parse(feed.Items[0])
+    assert.NoError(t, err)
+    assert.NotEmpty(t, story.Title)
+    assert.NotEmpty(t, story.Summary)
+    assert.Greater(t, len(story.Sources), 0)
+}
+```
+
+**With Test Coves Instance:**
+```go
+func TestE2E_CreatePost(t *testing.T) {
+    if testing.Short() {
+        t.Skip("Skipping E2E test")
+    }
+
+    // Create post in test community
+    post := aggregator.Post{
+        Title:   "Test Kagi News Post",
+        Content: "Test content...",
+    }
+
+    err := aggregator.CreatePost(ctx, testCommunityDID, post)
+    assert.NoError(t, err)
+
+    // Verify post appears in feed
+    // (requires test community setup)
+}
+```
+
+---
+
+## Success Metrics
+
+### Pre-Launch Checklist
+
+- [ ] Aggregator service declaration published
+- [ ] DID created and configured (did:web:kagi-news.coves.social)
+- [ ] RSS feed parser handles all Kagi HTML structures
+- [ ] Deduplication prevents duplicate posts
+- [ ] Category mapping works for all configs
+- [ ] All 3 post formats render correctly
+- [ ] Attribution to Kagi News visible on all posts
+- [ ] Rate limiting prevents spam
+- [ ] Monitoring/alerting configured
+- [ ] E2E tests passing against test instance
+
+---
+
+### Alpha Goals (First Week)
+
+- [ ] 3+ communities using Kagi News aggregator
+- [ ] 50+ posts created successfully
+- [ ] Zero duplicate posts
+- [ ] < 5% parse errors
+- [ ] < 1% post creation failures
+- [ ] Stories posted within 15 minutes of RSS publication
+
+---
+
+### Beta Goals (First Month)
+
+- [ ] 10+ communities using aggregator
+- [ ] 500+ posts created
+- [ ] Community feedback positive (surveys)
+- [ ] Attribution compliance verified
+- [ ] No rate limit violations
+- [ ] < 1% error rate (parsing + posting)
+
+---
+
+## Future Enhancements
+
+### Phase 2 Features
+
+**Smart Category Detection:**
+- Use LLM to suggest additional categories for stories
+- Map Kagi categories to community tags automatically
+
+**Customizable Templates:**
+- Allow communities to customize post format with templates
+- Support Markdown/Handlebars templates in config
+
+**Story Scoring:**
+- Prioritize high-impact stories (many sources, breaking news)
+- Delay low-priority stories to avoid flooding feed
+
+**Cross-posting Prevention:**
+- Detect when multiple communities authorize same category
+- Intelligently cross-post vs. duplicate
+
+---
+
+### Phase 3 Features
+
+**Interactive Features:**
+- Bot responds to comments with additional sources
+- Updates megathread with new sources as story develops
+
+**Analytics Dashboard:**
+- Show communities which stories get most engagement
+- Trending topics from Kagi News
+- Source diversity metrics
+
+**Federation:**
+- Support other Coves instances using same aggregator
+- Shared deduplication across instances
+
+---
+
+## Open Questions
+
+### Need to Resolve Before Launch
+
+1. **Image Licensing:**
+   - ❓ Are images from Kagi proxy covered by CC BY-NC?
+   - ❓ Do we need to attribute original image sources?
+   - **Action:** Email support@kagi.com for clarification
+
+2. **Hotlinking Policy:**
+   - ❓ Is embedding Kagi proxy images acceptable?
+   - ❓ Should we download and re-host?
+   - **Action:** Test in staging, monitor for issues
+
+3. **Category Discovery:**
+   - ❓ How to discover all available category feeds?
+   - ❓ Are there categories beyond world/tech/business/sports?
+   - **Action:** Scrape https://news.kagi.com/ for all .xml links
+
+4. **Attribution Format:**
+   - ❓ Is "📰 Story aggregated by Kagi News" sufficient?
+   - ❓ Do we need more prominent attribution?
+   - **Action:** Review CC BY-NC best practices
+
+---
+
+## References
+
+- Kagi News About Page: https://news.kagi.com/about
+- Kagi News RSS Example: https://news.kagi.com/world.xml
+- Kagi Kite Public Repo: https://github.com/kagisearch/kite-public
+- CC BY-NC License: https://creativecommons.org/licenses/by-nc/4.0/
+- Parent PRD: [PRD_AGGREGATORS.md](PRD_AGGREGATORS.md)
+- Aggregator SDK: [TBD]
-- 
2.51.2