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document-api-endpoint

Document and type a Sentry API endpoint. Write or fix @extend_schema decorators, specify response TypedDicts, type request parameters, correct type drift between the declared schema and the runtime response, and validate the generated spec. Use when asked to "document an endpoint", "add OpenAPI docs", "add/fix @extend_schema", "type an endpoint response", "fix the response type", "fix type drift", "reuse a response type", "split an overloaded endpoint", "specify the response schema", "add a TypedDict response", "migrate a legacy api-docs path", "fix a parameter type", or "make an endpoint public" / "promote an endpoint" (promotion is one section here).

skills/document-api-endpoint/SKILL.md

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# Document & Type a Sentry API Endpoint

Add or fix OpenAPI docs for a Sentry endpoint with drf-spectacular. Full reference is at https://develop.sentry.dev/backend/api/public/, the most useful section to you will be https://develop.sentry.dev/backend/api/public/#5-method-decorator. This skill captures the non-obvious lessons on top of it. Most of the work is making the declared schema match what the endpoint actually returns. Before documenting, identify which endpoint class serves the route and what it does; the MCP tool that calls it is usually the fastest way to confirm its behavior. Promoting a PRIVATE/EXPERIMENTAL endpoint to PUBLIC is one application (see below).

## Workflow

1. Class-level `@extend_schema(tags=[...])` — use the closest existing `OPENAPI_TAGS` entry.
2. Method-level `@extend_schema(operation_id=..., parameters=[...], responses={...}, examples=...)`.
3. Reuse `src/sentry/apidocs/parameters.py` and `examples/*.py`; ensure `owner = ApiOwner.<TEAM>` is set.
4. If a legacy `api-docs/paths/**/*.json` covers the path, remove it (see lesson 4).
5. Validate, then verify against the live endpoint (lesson 1).

## Lessons