@biomejs/biome@2.5.15 v4.22.2
low risk
leejet/stable-diffusion.cppSep 30, 2026 → Oct 4, 20263 days between releases
What's New
The newer release adds error handling for unsupported MCP headers and modifies tool error reporting.
Breaking Changes
- Server now returns 400 for an unsupported MCP-Protocol-Version header
- Throwing tool errors are now returned as isError results instead of being thrown
Bug Fixes
- Return a throwing tool's error as an isError result
- Answer 400 for an unsupported MCP-Protocol-Version header
- Avoid secondary parameter name collisions in OpenAPI
- Preserve empty property names in JSON Schema issue paths
Upgrade Notes
The provided release notes describe different tools (Biome and FastMCP); there is no upgrade path between them.
The Two Releases
@biomejs/biome@2.5.15
Biome CLI v2.5.15
Sep 30, 2026· 22 days ago
Adds multiple new linter rules for React, Svelte, Astro, and CSS, significantly improves performance of HTML formatting and indexing, and fixes various bugs in configuration and formatting.
Full release notesv4.22.2
v4.22.2
Oct 4, 2026· 18 days ago
The server now returns a 400 error for an unsupported MCP-Protocol-Version header and returns throwing tool errors as isError results.
Full release notes