Anchor new code to an existing pattern

Look at how {{example: e.g. the GitHub webhook handler at src/webhooks/github.ts}} is implemented. Read it carefully, including its tests and any helpers it uses.

Then build {{new: e.g. a Stripe webhook handler}} following the same pattern.

Match:
- File and folder structure
- Naming conventions (functions, types, files)
- Error handling style
- Logging shape
- Test structure (test runner, assertion style, fixtures location)
- How configuration and secrets are read
- Any project-specific helpers used (don't reinvent what already exists)

When you have to make a choice the reference doesn't cover, say so explicitly and explain which option you picked and why. Don't silently introduce a new style.