canary-watch

Canary Watch — Post-Deploy Monitoring

When to Use

After deploying to production or staging
After merging a risky PR
When you want to verify a fix actually fixed it
Continuous monitoring during a launch window
After dependency upgrades

How It Works

Monitors a deployed URL for regressions. Runs in a loop until stopped or until the watch window expires.

What It Watches

1. HTTP Status — is the page returning 200?
2. Console Errors — new errors that weren't there before?
3. Network Failures — failed API calls, 5xx responses?
4. Performance — LCP/CLS/INP regression vs baseline?
5. Content — did key elements disappear? (h1, nav, footer, CTA)
6. API Health — are critical endpoints responding within SLA?
7. Static Assets — are JS, CSS, image, and font requests returning 2xx/3xx with expected content types?
8. SSE Streams — do event-stream endpoints connect and receive an initial event or heartbeat?

Watch Modes

Quick check (default): single pass, report results

/canary-watch https://myapp.com

Sustained watch: check every N minutes for M hours

Diff mode: compare staging vs production

Alert Thresholds

Notifications

When a critical threshold is crossed:

Desktop notification (macOS/Linux)
Optional: Slack/Discord webhook
Log to ~/.claude/canary-watch.log

Output

Integration

Pair with:

/browser-qa for pre-deploy verification
Hooks: add as a PostToolUse hook on git push to auto-check after deploys
CI: run in GitHub Actions after deploy step

Canary Watch — Post-Deploy Monitoring

When to Use

After deploying to production or staging
After merging a risky PR
When you want to verify a fix actually fixed it
Continuous monitoring during a launch window
After dependency upgrades

How It Works

Monitors a deployed URL for regressions. Runs in a loop until stopped or until the watch window expires.

What It Watches

1. HTTP Status — is the page returning 200?
2. Console Errors — new errors that weren't there before?
3. Network Failures — failed API calls, 5xx responses?
4. Performance — LCP/CLS/INP regression vs baseline?
5. Content — did key elements disappear? (h1, nav, footer, CTA)
6. API Health — are critical endpoints responding within SLA?
7. Static Assets — are JS, CSS, image, and font requests returning 2xx/3xx with expected content types?
8. SSE Streams — do event-stream endpoints connect and receive an initial event or heartbeat?

Watch Modes

Quick check (default): single pass, report results

/canary-watch https://myapp.com

Sustained watch: check every N minutes for M hours

Diff mode: compare staging vs production

Alert Thresholds

Notifications

When a critical threshold is crossed:

Desktop notification (macOS/Linux)
Optional: Slack/Discord webhook
Log to ~/.claude/canary-watch.log

Output

Integration

Pair with:

/browser-qa for pre-deploy verification
Hooks: add as a PostToolUse hook on git push to auto-check after deploys
CI: run in GitHub Actions after deploy step

Documentation

Documentation

Canary Watch — Post-Deploy Monitoring

When to Use

How It Works

What It Watches

Watch Modes

Alert Thresholds

Notifications

Output

Integration

Documentation

canary-watch

Documentation

Canary Watch — Post-Deploy Monitoring

When to Use

How It Works

What It Watches

Watch Modes

Alert Thresholds

Notifications

Output

Integration