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When a Gitea repo is renamed, the API returns a 301 redirect. Go's default `http.Client` follows 301/302/303 redirects by changing the HTTP method from PATCH/POST/PUT to GET and dropping the request body. This causes mutating API calls (edit PR, create issue, etc.) to silently appear to succeed while no write actually occurs — the client receives the current resource data via the redirected GET and returns it as if the edit worked. ## Fix Add a `CheckRedirect` function to both HTTP clients (SDK client in `gitea.go` and REST client in `rest.go`) that returns `http.ErrUseLastResponse` for non-GET/HEAD methods. This surfaces the redirect as an error instead of silently downgrading the request. GET/HEAD reads continue to follow redirects normally. ## Tests - `TestCheckRedirect`: table-driven unit tests for all HTTP methods + redirect limit - `TestDoJSON_RepoRenameRedirect`: regression test with `httptest` server proving PATCH to a 301 endpoint returns an error instead of silently succeeding - `TestDoJSON_GETRedirectFollowed`: verifies GET reads still follow 301 redirects *This PR was authored by Claude.* Reviewed-on: https://gitea.com/gitea/gitea-mcp/pulls/154 Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>