compose_feedback_services() called import_server() without awaiting it. That method became async in FastMCP 2.14, so on the version this package was built against it composed nothing while logging success. FastMCP 4 removed it outright. Use mount(), which is sync on 2.12 through 4.x. The test suite could not start (pytest-html hook, plugin not installed), so nothing caught this. Add pytest-html, bring examples/ over from the docs repo since the integration tests import them, and fix the tests that had drifted from the code. 407 tests pass on FastMCP 2.12.2, 2.14.3 and 4.0.10. - Declare fastmcp>=2.12.2,<5; CI matrix covers each family plus a non-blocking canary on the newest FastMCP - Add a composition test with real servers; the mocked ones could not see a missing await - Rewrite the README against the actual API and execute its examples - Ignore ruff UP042: StrEnum would change stored enum formatting - Version 2026.09.27