# feature-sunset

`https://ckrets.ai/problems/feature-sunset` is a problem type of the ckrets.ai API (RFC 9457: the body is
`application/problem+json` with `type`, `title`, `status` and `detail`; every problem from `/v1` also carries `requestId`).

| Status | Also in the answer | What to do |
|---|---|---|
| 410 | - | the feature you called was deprecated (announced in `/.well-known/ckrets.json` `deprecations` and `/llms.txt` at least six months before, with `Deprecation` and `Sunset` headers) and has now ended; use the replacement the deprecation names, and do not retry |

Every type, with its retry rule and headers: [limits.md, "Errors, retries and headers"](/limits.md#errors-retries-and-headers).