Ask Claude to Generate API Versioning Middleware
Changing an API without versioning breaks clients. Adding versioning after the fact is painful boilerplate — but Claude handles the whole setup from a description.
Add URL-prefix versioning to this Express API. Move the existing routes under /api/v1.
Create a /api/v2 namespace where the same routes exist but accept a new snake_case
request format. Add a Deprecation header to all v1 responses pointing to the v2 docs.
Claude structures the router hierarchy, wires up the version-specific controllers or handlers, and adds the Deprecation and Sunset response headers that well-behaved API clients expect.
Track usage before sunsetting:
Add middleware that logs a warning to our structured logger whenever a v1 endpoint
is called, including the client IP and User-Agent, so we can measure usage
before we sunset it.
If you prefer header-based versioning over URL prefixes, just change the prompt:
Use an Accept-Version header for versioning instead of URL prefixes. Default to
the latest version if the header is absent.
Claude will generate the content negotiation middleware and route dispatcher to match.
Version your API from day one — and when you forget, Claude makes it survivable to add later.
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Set up Claude Code as an automated reviewer in your CI pipeline — on every pull request, it reads the diff, checks for bugs, security issues, missing tests, and convention violations, then posts its findings as a PR comment. Your human reviewers get a head start because the obvious issues are already flagged before they look.
Before deploying, tell Claude to read your project — migrations, environment variables, queue workers, scheduled tasks, caching, third-party integrations — and generate a deployment checklist that's specific to your app. Not a generic "did you run migrations?" list, but one that knows YOUR infrastructure and catches the things YOUR deploy can break.
Instead of writing a README from memory or copying a template, tell Claude to read your project and generate one that's actually accurate — real setup instructions from your config, real architecture from your directory structure, real API examples from your routes, and real prerequisites from your dependency files.