The pairing came back perfectly clean, and it is the whole diagnosis:
has library_file_id → refused (11/11)
no library_file_id → deleted (7/7)
And /files/{libfile_id}/download answered 200 — not 403, not 404 — with
{status, error_code, error_type, error_message}. That endpoint accepts the
Library id; it is returning an application-level error inside an HTTP 200.
The probe printed only the keys and dropped the message, which is the one
thing that says what the call is missing.
- show() now prints the full body for every response, and detects a
non-JSON 200 as possible raw bytes.
- Added routes worth ruling in or out: the same call as POST, with a
conversation_id, /files/{lib}/content, /content?asset_pointer=, and four
Library listing endpoints — a listing usually reveals both the id form
the UI uses and the route that actually serves bytes.
- Probes a second Library id too, so one odd file cannot mislead us.