msd-core/.changeset/fix-3362-windows-powershell-gemini.md

type, pr

type	pr
Fixed	3368

Gemini install output is valid on Windows PowerShell - managed hook commands now use PowerShell's call operator when invoking quoted Node runners on Windows, and reinstall rewrites existing managed hooks without double-prefixing them. Gemini agent conversion also drops Claude-only AskUserQuestion / ask_user tool metadata and rewrites body references to runtime-neutral prompt wording. Fixes #3362.