Monitors deployed URLs after deployment, merge, or dependency upgrades for regressions and alerts on critical thresholds.
- What it does
- Checks a deployed URL for HTTP status, new console errors, failed network calls, performance regressions (LCP/CLS/INP), missing key content, and API health. It runs as a single quick check, continuous monitoring at an interval for a duration, or a diff comparison between staging and production. It classifies findings into critical, warning, and info thresholds and produces a canary report with status and diffs from baseline.
- When to use it
- Use after deploying to production or staging, after merging a risky PR, when verifying that a fix actually fixed the issue, during a launch window, or after a dependency upgrade.
- Requirements
- No scripts are shipped; instructions only. Requires access to the deployed URLs being monitored, and optionally a Slack or Discord webhook for notifications.