# Guard Memory Writes

Guard Memory Writes: what it does, its label on each agent, what it misses, and examples.

Catalog policy guard-memory-writes, version 0.0.10, labelled blocks on Claude Code.

> Ask the user before running any command on this page: each one changes how their agent or repository behaves.

## What it does

Refuses agent-memory writes holding pasted git history, a code block over 20 lines, a duplicate line or a secret. Warns (observe, ASI06) on an added line that tells the agent to run a command or fetch a URL, an encoded blob, and, only where the repo keeps .chock/egress-allowlist.txt, a URL host off it. Judges memory files only (MEMORY.md, CLAUDE.local.md, .claude/memory/**, memory/**/*.md, the agent's own stores) and what a change adds. No waiver. A write after an untrusted fetch is not seen.

## On each agent

| Agent | Label | What it does there |
| --- | --- | --- |
| Claude Code | Blocks | Blocks on an agent's file writes and at turn end |
| Cursor | Blocks | Blocks on an agent's file writes and at turn end |
| Codex | Blocks | 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) |
| GitHub Copilot | Blocks | 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) |
| Devin | Blocks | 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) |
| Grok | Not graded | Not graded yet for Grok |
| goose | Not graded | Not graded yet for goose |
| Antigravity | Not graded | Not graded yet for Antigravity |
| OpenHands | Not graded | Not graded yet for OpenHands |
| Kimi Code | Not graded | Not graded yet for Kimi Code |
| Factory Droid | Not graded | Not graded yet for Factory Droid |

## What it misses

This policy does not state what it misses.

## Examples from its eval suite

Refused: A memory file gains a pasted git diff header.

Allowed: A memory file holds short non-derivable facts and repeated headings.

## More

- [The policy on the catalog pages](https://chock.sh/coding/policies/guard-memory-writes/)
- [Source at the pinned catalog commit](https://github.com/open-coder-ai/chock-catalog/tree/1e60d211c1bb767152c6ab0167932da06ab3a10f/base/guard-memory-writes)


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