It helps prevent a few high-risk commands from running accidentally. The check applies before the agent uses Bash.

PreToolUse — Hook for Claude Code by samwalter2949348803-stack

PreToolUse

PreToolUse is a hook for Claude Code from samwalter2949348803-stack/Openclaw-catch-Claude-Code. Its token cost is not measured, scanned C, original, MIT.

A pre-command safety check for Bash commands used by an agent. It blocks commands matching patterns such as deleting files, dropping database tables, deleting database rows, or force-pushing Git changes.

In plain words

What is it for?: Use it to add a simple guard against selected destructive shell, database, and Git commands.
Why use it?: It helps prevent a few high-risk commands from running accidentally. The check applies before the agent uses Bash.

Written for Claude Code: PreToolUse hook event.

One of 2 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 1 are separate, each on its own page.

Good fit Use it to add a simple guard against selected destructive shell, database, and Git commands.

Compare 6 hooks from other repositories ↓

Install with agentmods

npx agentmods add hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/samwalter2949348803-stack/Openclaw-catch-Claude-Code

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use/github.svg)](https://agentmods.dev/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/samwalter2949348803-stack/openclaw-catch-claude-code/pre-tool-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade C, and why

PreToolUse scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

"command": "echo \"$BASH_COMMAND\" | grep -qE '^(rm -rf|drop table|DELETE FROM|git push --force)' && echo 'BLOCKED' && exit 1 || exit 0"

openclaw/claude_setting_example/code/.claude/settings.json · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "echo \"$BASH_COMMAND\" | grep -qE '^(rm -rf|drop table|DELETE FROM|git push --force)' && echo 'BLOCKED' && exit 1 || exit 0"
        }
      ]
    }
  ]
}

Same file

What else `settings.json` configures

This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.

Settings file Openclaw-catch-Claude-Code C not measured

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 13 lines scan C 53a210bdf755

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository samwalter2949348803-stack/Openclaw-catch-Claude-Code (47 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.