chore(main): release 0.3.5

[release-please]

🤖 I have created a release beep boop

0.3.5 (2026-09-23)

Features

• prebuilt: Migrate skills-repo toolsets to kind: group with descriptions (mcp-toolbox#​3595) (b895b36) (b65f184)
• server: Add /healthz endpoint for container health checks (mcp-toolbox#​3060) (d5aefbc) (b65f184)
• skills: Add --group flag to generate a skill from one group (mcp-toolbox#​3585) (c1abd4f) (b65f184)
• skills: Default --name to --group, --toolset, or single --prebuilt name (mcp-toolbox#​3586) (2b33b08) (b65f184)
• skills: Make description optional during skills gen (mcp-toolbox#​3584) (d0a8f14) (b65f184)
• Add groups support (mcp-toolbox#​3605) (e75ec3b) (b65f184)
• plugin: migrate from generated skills to the prebuilt MCP server (#140) (502ff19)
• plugin: support agent plugin spec (#137) (9eac991)
• Update draft specs to 2026-07-28 (mcp-toolbox#​3699) (cf128ff) (b65f184)

Bug Fixes

• server: Sort default toolset alphabetically for stable ordering (mcp-toolbox#​3539) (e5da24c) (b65f184)
• Re-add name validation to tools name (mcp-toolbox#​3654) (944f6ce) (b65f184)
• Re-add tool validation during startup (mcp-toolbox#​3705) (25ce953) (b65f184)

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