A git hook runs with a stripped PATH, so `command -v dotnet` missed the SDK
that was already installed and ensure_dotnet fell through to downloading one.
It asked for the current channel, got .NET 9, and failed every project in the
solution with NETSDK1045 — the build only breaks when the hook actually runs,
which is precisely when it is least welcome.
ensure_dotnet now looks in DOTNET_ROOT and the usual per-user and system install
locations before downloading anything, and the download is pinned to the channel
matching the repo's TargetFramework rather than whatever is current.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S56bfZMGe1hnhpWP4CjjNw
