> ## Documentation Index
> Fetch the complete documentation index at: https://docs.anyformat.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# September 2026

> Changes shipped in September 2026.

### September 11, 2026

<Warning>
  **\[Breaking + API]** One consolidated error envelope across the API

  Every REST API error response now carries `{error, detail, error_code, retryable, request_id}`. Branch on `error_code`; `request_id` is the sole correlation handle to quote in a support request. (MCP tool errors add a numeric `status` field, because a tool error travels inside a 200 JSON-RPC response.)

  **Action required:** read the machine-readable code from `error_code`, not a separate `code` field. There is no `reference_id` — use `request_id`. Responses no longer include a `params` object, and there is no bare `{ "detail": … }` fallback shape; any occurrence-specific value, such as the scope a call is missing, is named in the `error` sentence. `detail` stays free-shaped developer diagnostics and may be omitted.

  See [Errors](/api-reference/errors) for the full envelope and code reference.
</Warning>