From agent-skills
Provides pre-launch checklists for safe production deployments, covering code quality, security, performance, accessibility, infrastructure, documentation, feature flags, monitoring, and rollback strategies.
npx claudepluginhub addyosmani/agent-skills --plugin agent-skillsThis skill uses the workspace's default tool permissions.
Ship with confidence. The goal is not just to deploy — it's to deploy safely, with monitoring in place, a rollback plan ready, and a clear understanding of what success looks like. Every launch should be reversible, observable, and incremental.
Deploys applications to Vercel, Netlify, AWS, GCP, DigitalOcean, or VPS after pre-deploy tests, security scans, build verification, and health checks. Activates on 'deploy', 'push to production', 'ship it'.
Runs pre-flight checks for env vars, migrations (Drizzle/Prisma/Knex), bundle size, git status, rollback plan, then deploys to Vercel, Railway, Fly.io, Cloudflare, Docker, or git.
Runs a go/no-go pre-launch checklist checking showstoppers like auth, payments, core flows; UX; operations like monitoring and backups; and professional polish before deploying to real users.
Share bugs, ideas, or general feedback.
Ship with confidence. The goal is not just to deploy — it's to deploy safely, with monitoring in place, a rollback plan ready, and a clear understanding of what success looks like. Every launch should be reversible, observable, and incremental.
console.log debugging statements in production codenpm audit shows no critical or high vulnerabilitiesShip behind feature flags to decouple deployment from release:
// Feature flag check
const flags = await getFeatureFlags(userId);
if (flags.taskSharing) {
// New feature: task sharing
return <TaskSharingPanel task={task} />;
}
// Default: existing behavior
return null;
Feature flag lifecycle:
1. DEPLOY with flag OFF → Code is in production but inactive
2. ENABLE for team/beta → Internal testing in production environment
3. GRADUAL ROLLOUT → 5% → 25% → 50% → 100% of users
4. MONITOR at each stage → Watch error rates, performance, user feedback
5. CLEAN UP → Remove flag and dead code path after full rollout
Rules:
1. DEPLOY to staging
└── Full test suite in staging environment
└── Manual smoke test of critical flows
2. DEPLOY to production (feature flag OFF)
└── Verify deployment succeeded (health check)
└── Check error monitoring (no new errors)
3. ENABLE for team (flag ON for internal users)
└── Team uses the feature in production
└── 24-hour monitoring window
4. CANARY rollout (flag ON for 5% of users)
└── Monitor error rates, latency, user behavior
└── Compare metrics: canary vs. baseline
└── 24-48 hour monitoring window
└── Advance only if all thresholds pass (see table below)
5. GRADUAL increase (25% -> 50% -> 100%)
└── Same monitoring at each step
└── Ability to roll back to previous percentage at any point
6. FULL rollout (flag ON for all users)
└── Monitor for 1 week
└── Clean up feature flag
Use these thresholds to decide whether to advance, hold, or roll back at each stage:
| Metric | Advance (green) | Hold and investigate (yellow) | Roll back (red) |
|---|---|---|---|
| Error rate | Within 10% of baseline | 10-100% above baseline | >2x baseline |
| P95 latency | Within 20% of baseline | 20-50% above baseline | >50% above baseline |
| Client JS errors | No new error types | New errors at <0.1% of sessions | New errors at >0.1% of sessions |
| Business metrics | Neutral or positive | Decline <5% (may be noise) | Decline >5% |
Roll back immediately if:
Application metrics:
├── Error rate (total and by endpoint)
├── Response time (p50, p95, p99)
├── Request volume
├── Active users
└── Key business metrics (conversion, engagement)
Infrastructure metrics:
├── CPU and memory utilization
├── Database connection pool usage
├── Disk space
├── Network latency
└── Queue depth (if applicable)
Client metrics:
├── Core Web Vitals (LCP, INP, CLS)
├── JavaScript errors
├── API error rates from client perspective
└── Page load time
// Set up error boundary with reporting
class ErrorBoundary extends React.Component {
componentDidCatch(error: Error, info: React.ErrorInfo) {
// Report to error tracking service
reportError(error, {
componentStack: info.componentStack,
userId: getCurrentUser()?.id,
page: window.location.pathname,
});
}
render() {
if (this.state.hasError) {
return <ErrorFallback onRetry={() => this.setState({ hasError: false })} />;
}
return this.props.children;
}
}
// Server-side error reporting
app.use((err: Error, req: Request, res: Response, next: NextFunction) => {
reportError(err, {
method: req.method,
url: req.url,
userId: req.user?.id,
});
// Don't expose internals to users
res.status(500).json({
error: { code: 'INTERNAL_ERROR', message: 'Something went wrong' },
});
});
In the first hour after launch:
1. Check health endpoint returns 200
2. Check error monitoring dashboard (no new error types)
3. Check latency dashboard (no regression)
4. Test the critical user flow manually
5. Verify logs are flowing and readable
6. Confirm rollback mechanism works (dry run if possible)
Every deployment needs a rollback plan before it happens:
## Rollback Plan for [Feature/Release]
### Trigger Conditions
- Error rate > 2x baseline
- P95 latency > [X]ms
- User reports of [specific issue]
### Rollback Steps
1. Disable feature flag (if applicable)
OR
1. Deploy previous version: `git revert <commit> && git push`
2. Verify rollback: health check, error monitoring
3. Communicate: notify team of rollback
### Database Considerations
- Migration [X] has a rollback: `npx prisma migrate rollback`
- Data inserted by new feature: [preserved / cleaned up]
### Time to Rollback
- Feature flag: < 1 minute
- Redeploy previous version: < 5 minutes
- Database rollback: < 15 minutes
references/security-checklist.mdreferences/performance-checklist.mdreferences/accessibility-checklist.md| Rationalization | Reality |
|---|---|
| "It works in staging, it'll work in production" | Production has different data, traffic patterns, and edge cases. Monitor after deploy. |
| "We don't need feature flags for this" | Every feature benefits from a kill switch. Even "simple" changes can break things. |
| "Monitoring is overhead" | Not having monitoring means you discover problems from user complaints instead of dashboards. |
| "We'll add monitoring later" | Add it before launch. You can't debug what you can't see. |
| "Rolling back is admitting failure" | Rolling back is responsible engineering. Shipping a broken feature is the failure. |
Before deploying:
After deploying: