chore(beads): drop a MacBook-only lefthook path from the committed hook

[GeiserX]

The committed .beads/hooks/prepare-commit-msg carried a fallback that ran lefthook from a path under one person's home directory on one machine. That path exists nowhere else, so the branch never fired for anyone but its author, and a public repo should not name a home directory.

The fix removes those three lines. The hook still finds lefthook on PATH, in node_modules, or through the package-manager runners, exactly as before. No other hook changes.

Summary by CodeRabbit

• Chores
  • Commit preparation now uses Lefthook when it is available through the standard command lookup and no explicit executable is configured. Existing repository and package-manager fallbacks remain available. This removes reliance on a platform-specific Lefthook executable.

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: GeiserX/Pumperly/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: c2473b3a-b55b-4c74-bcbb-c622b41786e5

📥 Commits

Reviewing files that changed from the base of the PR and between c60e4ae and 03092b3.

📒 Files selected for processing (1)

• .beads/hooks/prepare-commit-msg

💤 Files with no reviewable changes (1)

• .beads/hooks/prepare-commit-msg

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📝 Walkthrough

Walkthrough

The prepare-commit-msg hook removes a hard-coded macOS ARM64 Lefthook binary check and invocation. When LEFTHOOK_BIN is unset, it uses lefthook from command lookup if available; otherwise, it continues to the existing fallback search.

Changes

Lefthook command resolution

Layer / File(s)	Summary
Hook command resolution .beads/hooks/prepare-commit-msg	The hook no longer checks or invokes the hard-coded binary path. It uses lefthook from command lookup when available, or continues to the existing fallback search.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 03092

The hook retains its supported Lefthook lookup paths and is ready to merge after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the main change: removing the MacBook-specific Lefthook path from the committed hook.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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