Review Scripts That Run on Install
Blocks on an agent's file writes and at turn end.
Acts on
File write · Turn end
When
Before the file write · at turn end
Tested
28 of 28 pass
In a git repo
At commit
What it does
Blocks fetch-exec class hooks and asks about other new ones when a change adds or edits code that runs at install or build time: npm install/prepare/pack scripts, gypfile without native sources, bin shadowing, unpinned git/URL deps; setup.py cmdclass and import-time calls, .pth imports, conftest, pyproject build hooks; build.rs and build-deps; go:generate; MSBuild Exec; gemspec, extconf, Podfile, Composer, Maven, Gradle exec. Judges file text, not what a hook runs. Friction, not a security boundary.
Chock adds friction. It is not a security boundary.
Its label on each agent
The catalog grades each policy on each agent. Pick an agent to build with this policy:
- Claude Code TestedBlocks Blocks on an agent's file writes and at turn endBuild →
- Cursor TestedBlocks Blocks on an agent's file writes and at turn end. Where its description says it asks, it refuses at both points, because this client cannot prompt at either pointBuild →
- Codex TestedBlocks Blocks on an agent's file writes and at turn end. Where its description says it asks, it refuses at both points, because this client cannot prompt at either point. If the hook errors, the action goes through (not witnessed; the vendor's row is only partly live-run)Build →
- GitHub Copilot TestedBlocks Blocks at turn end only. It does not check a file write when it happens. Where its description says it asks, it refuses at turn end, because this client cannot prompt there. If the hook errors, the action goes through (not witnessed; the vendor's row is only partly live-run)Build →
- Devin TestedBlocks Blocks at turn end only. It does not check a file write when it happens. Where its description says it asks, it refuses at turn end, because this client cannot prompt there. If the hook errors, the action goes through (vendor docs only, not witnessed)Build →
- Grok Tested Not graded yet for GrokBuild →
- goose Tested Not graded yet for gooseBuild →
- Antigravity Tested Not graded yet for AntigravityBuild →
- OpenHands Untested Not graded yet for OpenHandsBuild →
- Kimi Code Untested Not graded yet for Kimi CodeBuild →
- Factory Droid Untested Not graded yet for Factory DroidBuild →
See it in action
Refused
A commit adds a postinstall script that pipes a download into sh (roadmap postinstall-curl).
Allowed
A commit adds husky's documented prepare script (roadmap husky-prepare).
Both examples are this policy's own test cases.
What it misses
This policy does not state what it misses.
Latest change
0.1.2 · · Title wording only (IR-F40): "Flag Package Lifecycle Scripts" is now "Review Scripts That Run on Install". The id, guard and tests are unchanged.