Pretooluse Gate Guard

loom-buildersourcepython
Path: loom-builder/.claude/hooks/pretooluse_gate_guard.pyRelative: .claude/hooks/pretooluse_gate_guard.pySubproject: loom-builderCategory: other
Lines: 105Bytes: 3,779Imports: 5Exports: 4
loom-buildersourcepythonhooks

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  1. #!/usr/bin/env python3
  2. """pretooluse_gate_guard.py — Claude Code PreToolUse hook enforcing N15.
  4. Blocks Edit/Write/MultiEdit/NotebookEdit targeting a MANIFESTED file under
  5. gates/v*/ , and Bash commands that would mutate one. New files in new version
  6. dirs are always allowed — that's the sanctioned flow.
  8. Mechanism: prints hookSpecificOutput.permissionDecision="deny" and exits 0.
  9. JSON deny is used instead of bare exit-2 because exit 2 has a known
  10. unreliability with Write/Edit blocking (anthropics/