For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
- Chunk metadata now works in query filters: metadata set with the chunk metadata endpoints is written to the search index, so
filter matches it the same way as metadata set at upload time. Previously it was returned in responses but could not be filtered on.
- Clearer filter errors: a filter that references an unknown field or uses an unsupported shape now returns a
400 with the underlying error message instead of a 500. Filter keys are top-level field names, for example {"userId": {"$eq": "..."}}; see Advanced Search & Relations.
- Reserved field protection: internal field names such as
file_id and content are rejected as custom metadata keys with a 400.
