v4.20.15

Name: cybos
Author: Gerstep

Gerstep/cybosv4.20.15Sep 21, 2026by github-actions[bot]

Upgrading?

What changed from v1.22.1 → v4.20.15?What's new in v4.20.16 after v4.20.15?

AI Summary

This release improves server stability and OpenAPI handling, allowing tool calls with optional arguments and fixing potential logging errors.

Key Highlights

Server stability fix for failed log notifications
OpenAPI preservation of JSON dictionary bodies with empty properties
Support for tools/call requests that omit params.arguments

Full Release Notes

## [4.20.15](https://github.com/punkpeye/fastmcp/compare/v4.20.14...v4.20.15) (2026-09-21)


### Bug Fixes

* accept a tools/call that omits params.arguments ([#383](https://github.com/punkpeye/fastmcp/issues/383)) ([e7e4520](https://github.com/punkpeye/fastmcp/commit/e7e45208d339101d8cf0eb39323fb3de56dbd960))
* catch failed log notifications instead of crashing the server ([#382](https://github.com/punkpeye/fastmcp/issues/382)) ([c15e194](https://github.com/punkpeye/fastmcp/commit/c15e194eab508e798cc43ca4e8c8cb66d3c29445))
* **openapi:** preserve JSON dictionary bodies with empty properties ([#381](https://github.com/punkpeye/fastmcp/issues/381)) ([d9edf6c](https://github.com/punkpeye/fastmcp/commit/d9edf6cb5befd49e65723b860fb5418cfb0c3c06))

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