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chore(deps): upgrade fastmcp to 4.2.0 - #2115
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phernandez wants to merge 1 commit into
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FastMCP 4.2 makes skills a first-class server feature and deprecates the 4.1 skills API we used, for removal in 4.3. The bundled skills now come from fastmcp.skills.provider.SkillsDirectoryProvider, which validates every SKILL.md at startup and registers the Skills extension itself, so the experimental_skills flag and the manual add_extension call are gone. The Claude Code and Codex hook scripts pin the same fastmcp version. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CMYVL1rjJwNnrvxniz1dDD Signed-off-by: phernandez <paul@basicmachines.co>
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Upgrades FastMCP from 4.1.3 to 4.2.0, the release that makes skills a server feature.
Change
fastmcp==4.2.0inpyproject.tomland in the four Claude Code and Codex hook scripts, which must match the core pin.mcp/resources/skills.pymoves off the 4.1 skills API, which 4.2 deprecates and 4.3 removes. It now usesfastmcp.skills.provider.SkillsDirectoryProvider. That provider:skills/list, SEP-2640) itself, so theexperimental_skills=Trueflag and the manualadd_extension(SkillsExtension(...))call are gone;SKILL.mdat construction, so a malformed bundled skill fails server startup instead of disappearing from the list.Tests
-W error::DeprecationWarning, andSkillsExtensionis registered.tests/mcp/test_skill_resources.pyandtests/test_skills_dist.py: 60 passed.just fast-checkpasses.just test-sqlite: 8712 passed, 7 failed.test_codex_plugin_package.py), fixed by this commit.🤖 Generated with Claude Code
https://claude.ai/code/session_01CMYVL1rjJwNnrvxniz1dDD