v2.133.0 v4.22.2
docling-project/doclingOct 3, 2026 → Oct 4, 20261 day between releases
What's New
Older release focuses on OCR and document parsing; newer release addresses MCP protocol and OpenAPI handling.
Breaking Changes
- Returns 400 for unsupported MCP-Protocol-Version headers
- Changes tool error serialization to return isError results
Improvements
- Avoids secondary parameter name collisions in OpenAPI
- Preserves empty property names in JSON Schema issue paths
Bug Fixes
- Fixes tool error serialization to return isError results
- Fixes secondary parameter name collisions in OpenAPI
- Preserves empty property names in JSON Schema issue paths
Upgrade Notes
Clients must ensure they send a supported MCP-Protocol-Version header to avoid 400 errors. Error handling logic for tools should be updated to expect isError results instead of throwing exceptions.
The Two Releases
Oct 3, 2026· 19 days ago
This release focuses on improving document parsing accuracy for various formats, specifically addressing issues with LaTeX decoding, OpenDocument charts, and Markdown formatting. It also introduces configuration options for OCR models.
Full release notesv4.22.2
Oct 4, 2026· 18 days ago
This release includes multiple bug fixes for edge cases in the MCP protocol, OpenAPI parameter handling, and JSON Schema generation.
Full release notes