Implements infrastructure-level enforcement of the "no PRs" policy.
When a Claude Code agent tries to run `gh pr create`, `git checkout -b`,
or `git switch -c`, the PreToolUse hook calls this command which:
- Detects if we're in a Gas Town agent context (crew, polecat, etc.)
- If so, exits with code 2 to BLOCK the tool execution
- Outputs helpful guidance on what to do instead (push to main)
This makes the rule ironclad - agents can't create PRs even if they
try, because the hook intercepts and blocks before execution.
Hook configuration (add to .claude/settings.json):
"PreToolUse": [{
"matcher": "Bash(gh pr create*)",
"hooks": [{"command": "gt block-pr-workflow --reason pr-create"}]
}]
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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