{"id":"bd658fe8-8a28-4e9b-94a5-57522ba6c4b8","shortId":"TruhuZ","kind":"skill","title":"canary","tagline":"Post-deploy canary monitoring. Watches the live app for console errors,\nperformance regressions, and page failures using the browse daemon. Takes\nperiodic screenshots, compares against pre-deploy baselines, and alerts\non anomalies. Use when: \"monitor deploy\", \"canary\", \"post-depl","description":"## Preamble\n\n```bash\neval \"$(~/.vibestack/bin/vibe-slug 2>/dev/null)\" 2>/dev/null || SLUG=\"unknown\"\n_LEARN_FILE=\"${VIBESTACK_HOME:-$HOME/.vibestack}/projects/${SLUG:-unknown}/learnings.jsonl\"\nif [ -f \"$_LEARN_FILE\" ]; then\n  _LEARN_COUNT=$(wc -l < \"$_LEARN_FILE\" 2>/dev/null | tr -d ' ')\n  echo \"LEARNINGS: $_LEARN_COUNT entries loaded\"\n  if [ \"$_LEARN_COUNT\" -gt 5 ] 2>/dev/null; then\n    ~/.vibestack/bin/vibe-learnings-search --limit 5 2>/dev/null || true\n  fi\nelse\n  echo \"LEARNINGS: none yet\"\nfi\n```\n\n## SETUP\n\n```bash\n# vibestack does not include a browse daemon.\necho \"BROWSE_NOT_AVAILABLE\"\n```\n\nIf `BROWSE_NOT_AVAILABLE`: skip all `$B` commands and use text-only fallbacks (curl, open, direct HTTP checks).\n\n## Step 0: Detect platform and base branch\n\nFirst, detect the git hosting platform from the remote URL:\n\n```bash\ngit remote get-url origin 2>/dev/null\n```\n\n- If the URL contains \"github.com\" → platform is **GitHub**\n- If the URL contains \"gitlab\" → platform is **GitLab**\n- Otherwise, check CLI availability:\n  - `gh auth status 2>/dev/null` succeeds → platform is **GitHub** (covers GitHub Enterprise)\n  - `glab auth status 2>/dev/null` succeeds → platform is **GitLab** (covers self-hosted)\n  - Neither → **unknown** (use git-native commands only)\n\nDetermine which branch this PR/MR targets, or the repo's default branch if no\nPR/MR exists. Use the result as \"the base branch\" in all subsequent steps.\n\n**If GitHub:**\n1. `gh pr view --json baseRefName -q .baseRefName` — if succeeds, use it\n2. `gh repo view --json defaultBranchRef -q .defaultBranchRef.name` — if succeeds, use it\n\n**If GitLab:**\n1. `glab mr view -F json 2>/dev/null` and extract the `target_branch` field — if succeeds, use it\n2. `glab repo view -F json 2>/dev/null` and extract the `default_branch` field — if succeeds, use it\n\n**Git-native fallback (if unknown platform, or CLI commands fail):**\n1. `git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's|refs/remotes/origin/||'`\n2. If that fails: `git rev-parse --verify origin/main 2>/dev/null` → use `main`\n3. If that fails: `git rev-parse --verify origin/master 2>/dev/null` → use `master`\n\nIf all fail, fall back to `main`.\n\nPrint the detected base branch name. In every subsequent `git diff`, `git log`,\n`git fetch`, `git merge`, and PR/MR creation command, substitute the detected\nbranch name wherever the instructions say \"the base branch\" or `<default>`.\n\n---\n\n# /canary — Post-Deploy Visual Monitor\n\nYou are a **Release Reliability Engineer** watching production after a deploy. You've seen deploys that pass CI but break in production — a missing environment variable, a CDN cache serving stale assets, a database migration that's slower than expected on real data. Your job is to catch these in the first 10 minutes, not 10 hours.\n\nYou use the browse daemon to watch the live app, take screenshots, check console errors, and compare against baselines. You are the safety net between \"shipped\" and \"verified.\"\n\n## User-invocable\nWhen the user types `/canary`, run this skill.\n\n## Arguments\n- `/canary <url>` — monitor a URL for 10 minutes after deploy\n- `/canary <url> --duration 5m` — custom monitoring duration (1m to 30m)\n- `/canary <url> --baseline` — capture baseline screenshots (run BEFORE deploying)\n- `/canary <url> --pages /,/dashboard,/settings` — specify pages to monitor\n- `/canary <url> --quick` — single-pass health check (no continuous monitoring)\n\n## Instructions\n\n### Phase 1: Setup\n\n```bash\neval \"$(~/.vibestack/bin/vibe-slug 2>/dev/null || echo \"SLUG=unknown\")\"\nmkdir -p .vibestack/canary-reports\nmkdir -p .vibestack/canary-reports/baselines\nmkdir -p .vibestack/canary-reports/screenshots\n```\n\nParse the user's arguments. Default duration is 10 minutes. Default pages: auto-discover from the app's navigation.\n\n### Phase 2: Baseline Capture (--baseline mode)\n\nIf the user passed `--baseline`, capture the current state BEFORE deploying.\n\nFor each page (either from `--pages` or the homepage):\n\n```bash\n$B goto <page-url>\n$B snapshot -i -a -o \".vibestack/canary-reports/baselines/<page-name>.png\"\n$B console --errors\n$B perf\n$B text\n```\n\nCollect for each page: screenshot path, console error count, page load time from `perf`, and a text content snapshot.\n\nSave the baseline manifest to `.vibestack/canary-reports/baseline.json`:\n\n```json\n{\n  \"url\": \"<url>\",\n  \"timestamp\": \"<ISO>\",\n  \"branch\": \"<current branch>\",\n  \"pages\": {\n    \"/\": {\n      \"screenshot\": \"baselines/home.png\",\n      \"console_errors\": 0,\n      \"load_time_ms\": 450\n    }\n  }\n}\n```\n\nThen STOP and tell the user: \"Baseline captured. Deploy your changes, then run `/canary <url>` to monitor.\"\n\n### Phase 3: Page Discovery\n\nIf no `--pages` were specified, auto-discover pages to monitor:\n\n```bash\n$B goto <url>\n$B links\n$B snapshot -i\n```\n\nExtract the top 5 internal navigation links from the `links` output. Always include the homepage. Present the page list via AskUserQuestion:\n\n- **Context:** Monitoring the production site at the given URL after a deploy.\n- **Question:** Which pages should the canary monitor?\n- **RECOMMENDATION:** Choose A — these are the main navigation targets.\n- A) Monitor these pages: [list the discovered pages]\n- B) Add more pages (user specifies)\n- C) Monitor homepage only (quick check)\n\n### Phase 4: Pre-Deploy Snapshot (if no baseline exists)\n\nIf no `baseline.json` exists, take a quick snapshot now as a reference point.\n\nFor each page to monitor:\n\n```bash\n$B goto <page-url>\n$B snapshot -i -a -o \".vibestack/canary-reports/screenshots/pre-<page-name>.png\"\n$B console --errors\n$B perf\n```\n\nRecord the console error count and load time for each page. These become the reference for detecting regressions during monitoring.\n\n### Phase 5: Continuous Monitoring Loop\n\nMonitor for the specified duration. Every 60 seconds, check each page:\n\n```bash\n$B goto <page-url>\n$B snapshot -i -a -o \".vibestack/canary-reports/screenshots/<page-name>-<check-number>.png\"\n$B console --errors\n$B perf\n```\n\nAfter each check, compare results against the baseline (or pre-deploy snapshot):\n\n1. **Page load failure** — `goto` returns error or timeout → CRITICAL ALERT\n2. **New console errors** — errors not present in baseline → HIGH ALERT\n3. **Performance regression** — load time exceeds 2x baseline → MEDIUM ALERT\n4. **Broken links** — new 404s not in baseline → LOW ALERT\n\n**Alert on changes, not absolutes.** A page with 3 console errors in the baseline is fine if it still has 3. One NEW error is an alert.\n\n**Don't cry wolf.** Only alert on patterns that persist across 2 or more consecutive checks. A single transient network blip is not an alert.\n\n**If a CRITICAL or HIGH alert is detected**, immediately notify the user via AskUserQuestion:\n\n```\nCANARY ALERT\n════════════\nTime:     [timestamp, e.g., check #3 at 180s]\nPage:     [page URL]\nType:     [CRITICAL / HIGH / MEDIUM]\nFinding:  [what changed — be specific]\nEvidence: [screenshot path]\nBaseline: [baseline value]\nCurrent:  [current value]\n```\n\n- **Context:** Canary monitoring detected an issue on [page] after [duration].\n- **RECOMMENDATION:** Choose based on severity — A for critical, B for transient.\n- A) Investigate now — stop monitoring, focus on this issue\n- B) Continue monitoring — this might be transient (wait for next check)\n- C) Rollback — revert the deploy immediately\n- D) Dismiss — false positive, continue monitoring\n\n### Phase 6: Health Report\n\nAfter monitoring completes (or if the user stops early), produce a summary:\n\n```\nCANARY REPORT — [url]\n═════════════════════\nDuration:     [X minutes]\nPages:        [N pages monitored]\nChecks:       [N total checks performed]\nStatus:       [HEALTHY / DEGRADED / BROKEN]\n\nPer-Page Results:\n─────────────────────────────────────────────────────\n  Page            Status      Errors    Avg Load\n  /               HEALTHY     0         450ms\n  /dashboard      DEGRADED    2 new     1200ms (was 400ms)\n  /settings       HEALTHY     0         380ms\n\nAlerts Fired:  [N] (X critical, Y high, Z medium)\nScreenshots:   .vibestack/canary-reports/screenshots/\n\nVERDICT: [DEPLOY IS HEALTHY / DEPLOY HAS ISSUES — details above]\n```\n\nSave report to `.vibestack/canary-reports/{date}-canary.md` and `.vibestack/canary-reports/{date}-canary.json`.\n\nLog the result for the review dashboard:\n\n```bash\neval \"$(~/.vibestack/bin/vibe-slug 2>/dev/null)\"\nmkdir -p ~/.vibestack/projects/$SLUG\n```\n\nWrite a JSONL entry: `{\"skill\":\"canary\",\"timestamp\":\"<ISO>\",\"status\":\"<HEALTHY/DEGRADED/BROKEN>\",\"url\":\"<url>\",\"duration_min\":<N>,\"alerts\":<N>}`\n\n### Phase 7: Baseline Update\n\nIf the deploy is healthy, offer to update the baseline:\n\n- **Context:** Canary monitoring completed. The deploy is healthy.\n- **RECOMMENDATION:** Choose A — deploy is healthy, new baseline reflects current production.\n- A) Update baseline with current screenshots\n- B) Keep old baseline\n\nIf the user chooses A, copy the latest screenshots to the baselines directory and update `baseline.json`.\n\n## Important Rules\n\n- **Speed matters.** Start monitoring within 30 seconds of invocation. Don't over-analyze before monitoring.\n- **Alert on changes, not absolutes.** Compare against baseline, not industry standards.\n- **Screenshots are evidence.** Every alert includes a screenshot path. No exceptions.\n- **Transient tolerance.** Only alert on patterns that persist across 2+ consecutive checks.\n- **Baseline is king.** Without a baseline, canary is a health check. Encourage `--baseline` before deploying.\n- **Performance thresholds are relative.** 2x baseline is a regression. 1.5x might be normal variance.\n- **Read-only.** Observe and report. Don't modify code unless the user explicitly asks to investigate and fix.","tags":["canary","vibestack","timurgaleev","agent-skills","ai-agents","claude-code","cursor-ide","developer-tools","kiro","mcp","prompt-engineering","slash-commands"],"capabilities":["skill","source-timurgaleev","skill-canary","topic-agent-skills","topic-ai-agents","topic-claude-code","topic-cursor-ide","topic-developer-tools","topic-kiro","topic-mcp","topic-prompt-engineering","topic-slash-commands"],"categories":["vibestack"],"synonyms":[],"warnings":[],"endpointUrl":"https://skills.sh/timurgaleev/vibestack/canary","protocol":"skill","transport":"skills-sh","auth":{"type":"none","details":{"cli":"npx skills add timurgaleev/vibestack","source_repo":"https://github.com/timurgaleev/vibestack","install_from":"skills.sh"}},"qualityScore":"0.457","qualityRationale":"deterministic score 0.46 from registry signals: · indexed on github topic:agent-skills · 15 github stars · SKILL.md body (9,652 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