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safety-guard

Skill8 starsChanged 3 months agoMITView on GitHub

Use this skill to prevent destructive operations when working on production systems or running agents autonomously.

  • Deletes or force-pushes
  • Commits and pushes

We split this skill into the rules it gives an agent

4 rules. 4 are common, 0 are distinctive, and 0 are very specific to this project.

  • 4

    Common

    Most of the 9 edited versions we read keep these.

  • 0

    Distinctive

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Common:

    When working on production systems

    line 12
  2. Common:

    When agents are running autonomously (full-auto mode)

    line 13
  3. Common:

    When you want to restrict edits to a specific directory

    line 14
  4. Common:

    When detected: shows what the command does, asks for confirmation, suggests safer alternative.

    line 40

“Common” is measured: kept by at least 6 in 10 of the 9 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Safety Guard — Prevent Destructive Operations

When to Use

  • When working on production systems
  • When agents are running autonomously (full-auto mode)
  • When you want to restrict edits to a specific directory
  • During sensitive operations (migrations, deploys, data changes)

How It Works

Three modes of protection:

Mode 1: Careful Mode

Intercepts destructive commands before execution and warns:

Watched patterns:
- rm -rf (especially /, ~, or project root)
- git push --force
- git reset --hard
- git checkout . (discard all changes)
- DROP TABLE / DROP DATABASE
- docker system prune
- kubectl delete
- chmod 777
- sudo rm
- npm publish (accidental publishes)
- Any command with --no-verify

When detected: shows what the command does, asks for confirmation, suggests safer alternative.

Mode 2: Freeze Mode

Locks file edits to a specific directory tree:

/safety-guard freeze src/components/

Any Write/Edit outside src/components/ is blocked with an explanation. Useful when you want an agent to focus on one area without touching unrelated code.

Mode 3: Guard Mode (Careful + Freeze combined)

Both protections active. Maximum safety for autonomous agents.

/safety-guard guard --dir src/api/ --allow-read-all

Agents can read anything but only write to src/api/. Destructive commands are blocked everywhere.

Unlock

/safety-guard off

Implementation

Uses PreToolUse hooks to intercept Bash, Write, Edit, and MultiEdit tool calls. Checks the command/path against the active rules before allowing execution.

Integration

  • Enable by default for codex -a never sessions
  • Pair with observability risk scoring in ECC 2.0
  • Logs all blocked actions to ~/.claude/safety-guard.log

Download now (ZIP)

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What did you use it for? e.g. Reviewing pull requests in a Rails app

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