Block Unpinned Agent Components
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
54 of 54 pass
In a git repo
At commit
What it does
Gate for the line-visible slice of ASI04: agent components fetched at a floating version. Blocks dist-tags (latest, next, canary, beta, rc, nightly) on npx/uvx/bunx, dlx, add/install and pipx run; FROM at latest or an untagged registry path; floating docker run/pull and docker:// refs; pip --pre; go install at latest; unversioned cargo installs; git+ installs and requirements, and github: dependencies, with no commit SHA. Per line: friction, not a boundary (limits in references).
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 endBuild →
- Codex TestedBlocks Blocks on an agent's file writes and at turn end. 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. 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. 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 staged MCP config launches a server via npx at @latest.
Allowed
A staged MCP config pins the server to an exact version.
Both examples are this policy's own test cases.
What it misses
This policy does not state what it misses.
Latest change
0.1.1 · · Promoted from draft to production: every test case ran and passed, and no bug report was open. Behaviour unchanged.