canary

name	canary
description	Post-deploy monitoring loop. Watches for console errors, performance regressions, and page failures. Periodic screenshots and anomaly detection. Use after deploying to production.

Canary — Post-Deploy Monitoring

Extended monitoring after deployment. Watch for problems that only appear under real traffic.

Related skills: land-and-deploy | qa | benchmark

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Monitoring Loop

Run every 2-5 minutes for the specified duration (default: 30 minutes):

Each Iteration

1. Navigate to the production URL
2. Console errors — any new JS exceptions since last check?
3. Network errors — any failed requests?
4. Performance — page load time within normal range?
5. Screenshot — visual comparison with previous iteration
6. Key interactions — test 2-3 critical flows (login, main feature, etc.)

Anomaly Detection

Flag if any of these change between iterations:

• New console errors appear
• Network requests start failing
• Page load time increases > 50% from baseline
• Visual layout changes unexpectedly
• Key text content disappears
• HTTP status codes change (200 → 500)

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Output

CANARY REPORT
═══════════════════════════════════════
Duration:         30 minutes
Checks:           12
Anomalies:        0
Console errors:   0 new
Network errors:   0 new
Performance:      Stable (avg 1.8s LCP)
Status:           HEALTHY
═══════════════════════════════════════

If anomalies detected:

⚠️ ANOMALY DETECTED at [timestamp]
Type:     [console error / network failure / perf regression / visual change]
Details:  [specific error or change]
Action:   [recommend: investigate / revert / monitor]