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v4.20.0

ruvnet/RuViewv4.20.0Sep 4, 2026by github-actions[bot]

AI Summary

Introduces significant OpenAPI integration by wiring up schemas and defining serialization styles for content output.

Key Highlights

  • Wired outputSchema support for OpenAPI
  • Integrated structuredContent handling
  • Configured query and body serialization styles

New Features

  • OpenAPI output schema wiring
  • Structured content support
  • Query and body serialization styles

Full Release Notes

# [4.20.0](https://github.com/punkpeye/fastmcp/compare/v4.19.1...v4.20.0) (2026-09-04)


### Features

* **openapi:** wire outputSchema/structuredContent and query/body serialization styles ([#351](https://github.com/punkpeye/fastmcp/issues/351)) ([10b08f7](https://github.com/punkpeye/fastmcp/commit/10b08f7c6975ace9fcff1c24c5db815cc2f7565e))