# BACKLOG

## Remaining from 2026-08-11 (summary)

- **Test Fixtures**: media + playlist fixtures created; ffmpeg generation commands documented in test headers
- **User Frontend Tests**: video player, chat integration, responsive, accessibility, coverage
- **Admin Frontend Tests**: playlist UI, moderation UI, metrics dashboards, coverage
- **Cloudflare R2 Integration Test**: upload + cache header validation done (SyncToR2 with CacheControl + ContentType); edge cache hit/miss validation remains manual
- **Cloudflare Config**: Cloudflare Pages deploy workflow and setup docs created; manual dashboard setup (Tiered Cache, WAF, rate limiting, HTTPS/HSTS) remains pending; Pages project must be created in dashboard first.
- **External Services**: UptimeRobot monitors + alerts
- **Production Deployment**: Hetzner provisioning, CD pipeline, DNS cutover, smoke test
- **Scaling & Performance**: TTFB baseline and live benchmark runs still pending; loadtest scaffolding now includes Artillery/k6 helpers with auto summaries plus worksheet field mapping; chat p95, Redis saturation, and cache-hit threshold alerting are implemented

## Cloudflare Configuration

### DNS & Pages

- [x] Configure DNS for linearvoid.tv apex and www redirect (manual)
- [x] Configure media.linearvoid.tv for split-domain HLS delivery (manual)
- [x] Configure Cloudflare Pages deploy workflow (`.gitea/workflows/pages-deploy.yml`) and setup docs (`docs/operations/cloudflare-pages-setup.md`, `docs/operations/gitea-cloudflare-pages.md`)
- [x] Create Cloudflare Pages project in dashboard (unavailable, created `linearvoid` via API)
- [ ] Cloudflare Pages: link custom domain (manual)
- [ ] Create Cloudflare Pages project and cut over frontend hosting (manual)

### Storage & Cache

- [x] Create R2 bucket (manual)
- [x] Configure Cache Rules: .ts/.m4s + .m3u8 (manual)
- [x] Implement Worker for immutable cache headers on segment paths
- [ ] CORS headers on HLS responses from media.linearvoid.tv (MEDIUM) — needs Cloudflare R2 CORS config

### Security & TLS

- [ ] Enable Tiered Cache, WAF, rate limiting (manual)
- [ ] Tiered Cache: enable Smart Tiered Cache, validate `Cf-Cache-Status: HIT` from upper tier
- [ ] WAF: enable OWASP Managed Ruleset, set to Simulate → review 48h → Block, enable Bot Fight Mode
- [ ] Rate limiting: `/api/admin/login` + `/api/admin/*` → 10 req/10s per IP, Challenge action
- [ ] HTTPS/WSS: Always Use HTTPS, HSTS max-age=31536000 includeSubDomains preload, min TLS 1.2
- [ ] HTTPS/WSS: enforce at edge (Cloudflare) and origin (nginx), redirect HTTP → HTTPS

## Monitoring & Observability

### Prometheus & Grafana

- [x] Set up Prometheus with chat/playout/nginx/redis/postgres/node scrape targets
- [x] Add nginx-exporter, redis-exporter, postgres-exporter, node-exporter
- [x] Import Grafana app + operational dashboards
- [x] Define Prometheus alerting rules (8 rules: ChatDown, PlayoutDown, RedisDown, etc.)

### External Monitoring

- [ ] Set up UptimeRobot external monitoring
- [ ] UptimeRobot: add HTTP monitor for `https://linearvoid.tv/health` (5min interval)
- [ ] UptimeRobot: add keyword monitor for `https://linearvoid.tv/hls/playlist.m3u8` (keyword: `#EXTM3U`, 5min)
- [ ] Alert on 2 consecutive failures, notify via email + Discord/Slack webhook

## Security

- [x] Implement admin cookie-session auth (HttpOnly, SameSite=Strict, Secure when TLS)
- [x] Implement server-side session expiration
- [x] Implement rate limiting for chat messages (Redis windowing)
- [x] Implement WebSocket connection rate limiting (5/IP/60s)
- [x] Implement admin login rate limiting (5/IP/5min)
- [ ] Enforce HTTPS/WSS at edge and origin

## Test Fixtures

- [x] Create test media fixtures in `backend/playout/testdata/`: valid H.264/AAC, invalid codec, invalid framerate
- [x] Create test playlist fixtures: `valid_playlist.txt`, `empty_playlist.txt`, `comments_only.txt`, `mixed_valid_invalid.txt`
- [x] Document ffmpeg fixture-generation commands in test file headers

## Frontend Tests

### User Frontend

- [x] Video player behavior (play, pause, seek, buffering, error handling) — HLS player startup, native/fallback, URL resolution, error recovery with retries/backoff/reconnecting overlay
- [x] Chat functionality (send/receive messages, presence, rate limiting, moderation) — send, receive, presence join/leave, DM flow, reconnect covered
- [x] State management and data flow
- [x] Responsive design and layout across different screen sizes — chat-collapsed toggle, CSS grid, now-playing aria
- [x] Accessibility testing (keyboard navigation, screen reader support) — video controls, aria-labels, aria-expanded, input labels, reconnecting overlay aria-live/role
- [x] Integration with backend APIs (mocking API responses for testing)
- [ ] Test coverage for all critical frontend components and interactions
- [ ] Add code coverage reporting and enforce minimum coverage threshold in CI/CD pipeline
- [ ] Document test cases and expected outcomes

### Admin Frontend

- [x] Playlist management UI (add/remove videos, reorder, normalize) — save/error handling, sortable rendering
- [ ] User moderation tools (mute/ban/report users, view moderation logs)
- [x] Metrics and monitoring dashboards (Prometheus/Grafana integration) — overview + analytics rendering
- [x] State management and data flow
- [x] Responsive design and layout across different screen sizes — tab content visibility, essential tabs
- [x] Accessibility testing (keyboard navigation, screen reader support) — nav aria-label, active tab aria-current, nav button focusability
- [x] Integration with backend APIs (mocking API responses for testing)
- [ ] Test coverage for all critical admin UI components and interactions
- [ ] Add code coverage reporting and enforce minimum coverage threshold in CI/CD pipeline
- [ ] Document test cases and expected outcomes

## Backend Integration Tests

### Cloudflare R2

- [x] Upload test HLS segments and manifests to R2 bucket (SyncToR2 with mock, verified bucket/key/body)
- [x] Verify correct cache headers are applied (immutable segments via segmentCacheControl, short-lived manifests via manifestCacheControl)
- [ ] Test retrieval of segments and manifests from R2 via Cloudflare edge
- [ ] Validate cache hit/miss behavior and performance metrics
- [ ] Validate edge cache hit/miss behavior with repeat requests — script `scripts/validate-edge-cache.sh` created
- [x] Ensure integration test can run in CI/CD pipeline with proper mocking/stubbing of R2 API (putObject mock, no network calls)
- [x] Document test cases and expected outcomes
- [x] Document required stubs or mocks (putObject variable injection pattern)

## Streaming Pipeline

- [x] **Continuous R2 sync during playout (HIGH)**: fsnotify watcher uploads segments in real-time (~7s delay)
- [x] **Globally unique segment naming (HIGH)**: `r-{ISOTIME}/seg-{seq}.m4s` via run ID + ffmpeg monotonic sequence
- [x] **Atomic manifest publication (MEDIUM)**: Upload to `playlist.m3u8.tmp`, then `CopyObject` to final key
- [x] **Manifest Cache-Control alignment (LOW)**: `public, max-age=1, s-maxage=2, must-revalidate`
- [ ] **CORS headers on HLS responses (MEDIUM)**: Needs Cloudflare R2 bucket CORS config (infrastructure, not code)
- [x] **Player error recovery (MEDIUM)**: `hls.on(Hls.Events.ERROR)` handler with bounded retries (5x), exponential backoff, reconnecting overlay
- [x] **Health endpoint detail (LOW)**: Added active item, run ID, playlist revision, last segment seq, last R2 pub, consecutive failures
- [x] Source media contract + validation (H.264/AAC, 30fps, keyframe check)
- [x] fMP4 HLS packaging (6s segments, 24 window)
- [x] Slate fallback + recovery (`shouldEscalateToSlate`)
- [x] R2 cache headers (immutable segments, short-lived manifest)
- [x] Cloudflare Worker immutable `.m4s` headers

## External Services

> Evidence tracker: `docs/operations/cloudflare-uptimerobot-checklist.md`

- [ ] UptimeRobot: add HTTP monitor for `https://linearvoid.tv/health` (5min interval)
- [ ] UptimeRobot: add keyword monitor for `https://linearvoid.tv/hls/playlist.m3u8` (keyword: `#EXTM3U`, 5min)
- [ ] Alert on 2 consecutive failures, notify via email + Discord/Slack webhook

## Production Deployment

### Host Provisioning (Hetzner — not provisioned)

- [ ] Provision Hetzner CX22 (2 vCPU, 4 GB, 40 GB) in Ashburn VA, Ubuntu 24.04
- [ ] Install Docker Engine + Compose plugin, open firewall: 80/443 (public), 2375 (runner IP only)
- [ ] Configure Docker daemon for remote TLS access (`-H tcp://0.0.0.0:2376` with certs)
- [ ] Create `/srv/linearvoid/data/{playlist,media,hls,chat,slate}` directories

### CI/CD & Secrets

- [ ] Add `CI_PROD_*` secrets to Gitea: DOCKER_HOST, R2 keys, admin password, DB password, Grafana password
- [ ] Trigger CD workflow with `DOCKER_HOST` pointing to Hetzner IP

### Smoke Test & Cutover

- [ ] Verify all 11 containers start healthy, check `/health`, `/hls/playlist.m3u8`, WebSocket
- [ ] Update Cloudflare A record `linearvoid.tv` → Hetzner IP, SSL Full (strict), test HTTPS + WSS
- [ ] Smoke test: viewer SPA loads, HLS plays, chat connects, admin login → upload → playlist → playout

### Production Operations

- [ ] Set up Prometheus alerting notifications + UptimeRobot on production URL
- [ ] Run `scripts/backup-db.sh` + `scripts/verify-backups.sh` on production host
- [ ] Document production IP, SSH access, rollback procedure, scaling thresholds

## Scaling & Performance

### Load Testing

- [x] Load-test scaffolding: `ws-chat.yml`, `admin-api.js`, `run-loadtests.ps1`, summarizers, README
- [x] Cache-hit ratio exporter (`scripts/cache-hit-ratio.js` + `.ps1`)
- [x] Saturation alerts: chat p95 latency, Redis memory usage, cache-hit ratio
- [ ] Execute WebSocket load tests with real infrastructure — ramp 10→100→500→1000 connections, measure p95 latency + errors
- [ ] Execute admin API benchmarks with real infrastructure — `wrk`/`k6` against `/api/admin/*`, target p95 <1s

### Cache & TTFB Optimization

- [ ] Optimize segment immutability and manifest TTL for cache efficiency
- [ ] Tune manifest TTL: measure `Cf-Cache-Status` distribution, adjust to 0.5× segment duration
- [ ] Measure playback TTFB from multiple US regions — WebPageTest from 3+ regions, target <4s warm cache
- [ ] Track cache hit ratio and R2 ops in production — Cloudflare GraphQL → Grafana panel, alert <90%

### Capacity & Future Planning

- [ ] Capacity triggers: Prometheus rules for cache-miss >10%/15min, CPU >80%/10min
- [ ] Plan Phase 2 service separation — document boundaries (playout CPU, chat latency, DB state, monitoring), estimate per-service resources
- [ ] Plan Phase 3 multi-origin resilience — research second Hetzner location, design warm standby + DNS failover + DB/Redis replication

## Feature List (Future Enhancements)

- [ ] Admin backend
  - [ ] Analytics: implement a settings entry to set matomo url and page id
- [ ] User frontend
  - [ ] Chat: add user registration and login flows
  - [ ] Chat: private DM history and search
  - [ ] Analytics: add javascript snippet to send pageview events to matomo