Verifying a server/API change

The handle is curl (or equivalent). The evidence is the response.

Pattern

1. Start the server (background, with a readiness poll - see below)
2. curl the route the diff touches, with inputs that hit the changed branch
3. Capture the full response (status + headers + body)
4. Compare to expected

Lifecycle

If there's a run-skill it handles this. If not: