graphify hook install generated scripts that resolved the Python interpreter
purely at git-trigger time via 'command -v graphify'. GUI git clients (VS Code,
GitKraken), CI runners, and non-login shells often run with a minimal PATH that
omits ~/.local/bin -- the uv-tool / pipx launcher location. command -v graphify
returned empty, the python3/python fallbacks could not import graphify (it lives
only in the isolated venv), and the hook silently exited 0 with no output.
Fix: embed sys.executable of the currently-running install process as a pinned
first probe. Since 'graphify hook install' itself runs under the correct isolated
interpreter, sys.executable is always the right path. It is validated at
hook-runtime via 'import graphify' before use, so a stale pinned path safely
falls through to the existing dynamic detection rather than breaking the hook.
Also make the final fallback loud: print a diagnostic to stderr before exiting 0
so the failure is visible rather than invisible.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Safi
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