Type Alias StatusKeysOf<D, P, M>

StatusKeysOf: ResolveOperation<D, P, M> extends { responses: infer R }
    ? R extends Record<string, unknown>
        ? string extends keyof R ? string : Extract<keyof R, string>
        : string
    : string

Extract the status-code keys declared by an operation's responses map. Includes class wildcards (2XX, etc.) and the default sentinel; runtime documents widen to string.