Deploy: DevOps & Deployment for Claude Code | AI Skill Market | AI Skill Market

Deploy: DevOps & Deployment for Claude Code | AI Skill Market | AI Skill Market

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Deployment Rules

Pre-Deploy Checklist

Tests passing in CI — never deploy with failing tests
Environment variables set in target — missing secrets cause silent failures
Database migrations run before code deploy — new code expecting new schema fails
Rollback plan ready — know exactly how to revert before you need to

Deployment Strategies

Rolling: update instances one by one — safe, slower, no extra resources
Blue-green: full parallel environment, instant switch — fast rollback, 2x resources
Canary: route percentage to new version — catch issues early, complex routing
Choose based on risk tolerance and resources — no universal best

Zero-Downtime Deploys

Health checks must pass before traffic routes — unhealthy instances stay out
Graceful shutdown: finish in-flight requests before terminating
Database changes must be backwards compatible — old code still running during deploy
Session handling: sticky sessions or external session store — don't lose user state

CI/CD Pipeline

Build once, deploy everywhere — same artifact to staging and prod
Cache dependencies between builds — save minutes per deploy
Parallel steps where possible — tests, linting, security scans
Fail fast: quick checks first — don't wait for slow tests to catch typos
Pin action versions with SHA — tags can change unexpectedly

Environment Management

Staging mirrors prod — different configs cause "works in staging" bugs
Secrets in secret manager, not environment files — rotation without redeploy
Feature flags decouple deploy from release — ship dark, enable later
Config as code in version control — except secrets

Database Migrations

Migrations must be backwards compatible during deploy window
Add columns nullable first, then backfill, then add constraint
Never rename columns in one step — add new, migrate data, remove old
Test migrations on prod-size data — 10 rows is fast, 10 million isn't
Rollback script for every migration

Rollback

Automated rollback on health check failure
Keep previous version artifacts available — can't rollback what you deleted
Database rollbacks are hard — design migrations to not need them
Feature flags for instant rollback of functionality without deploy
Document rollback procedure — panic time is not learning time

Monitoring Post-Deploy

Watch error rates for 15 minutes after deploy — most issues surface quickly
Compare key metrics to pre-deploy baseline
Alerting on anomalies: latency spike, error rate increase
Log correlation: trace requests through systems
User-facing smoke tests after deploy

Platform-Specific

Containers

Image tagged with git SHA — know exactly what's running
Health check endpoint that verifies dependencies
Resource limits set — prevent runaway containers

Serverless

Cold start optimization — keep bundles small
Provisioned concurrency for latency-sensitive paths
Timeout set appropriately — default is often too short

Static Sites

CDN cache invalidation after deploy
Immutable assets with content hashes — cache forever
Preview deploys for PRs

Common Mistakes

Deploying Friday afternoon — issues surface when nobody's watching
No rollback plan — hoping nothing goes wrong isn't a strategy
Mixing code and migration deploys — one thing at a time
Manual deploy steps — if it's not automated, it's wrong sometimes
Deploying without monitoring — you won't know it's broken until users complain