Make validate_brain_file hook portable across python/python3#3
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hema-sanam wants to merge 1 commit into
Open
Make validate_brain_file hook portable across python/python3#3hema-sanam wants to merge 1 commit into
hema-sanam wants to merge 1 commit into
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The PostToolUse hook in the scaffold's settings.json invoked bare `python`,
which doesn't exist on macOS (and many Linux distros), where only `python3`
is on PATH. A generated PM-brain workspace would then fail to run the
validator on Write/Edit.
Use a POSIX-shell launcher that prefers python3 and falls back to python:
sh -c 'if command -v python3 >/dev/null 2>&1; then \
python3 .claude/hooks/validate_brain_file.py; \
else python .claude/hooks/validate_brain_file.py; fi'
No logic change to the hook itself.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Problem
The scaffold's
.claude/settings.jsonwires thevalidate_brain_file.pyPostToolUse hook with a barepython:On macOS (and many modern Linux distros) only
python3is onPATH—pythondoesn't exist. So a PM-brain workspace generated on those systems fails to run the validator on everyWrite/Edit, silently losing the provenance/link checks the hook is meant to enforce.Fix
Use a POSIX-shell launcher that prefers
python3and falls back topython:validate_brain_file.pyitself — launcher only.sh).#!/usr/bin/env python3, so this just makes the invocation match that intent.Test plan
sh -carg, no inner double quotes to escape).Writeunderhypotheses/in a generated workspace and confirm the hook runs viapython3.🤖 Generated with Claude Code