knowledge_upload_unsupported_format
The uploaded document is not one of the accepted formats (pdf, docx, csv, md, txt) - by declared format or by extension.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/knowledge_upload_unsupported_format",
"title": "…",
"status": 415,
"detail": "…",
"instance": "/v1/…"
}