PreToolUse

PreToolUse is a hook for coding agents from rmarquesa/agentmemory-offline. Its token cost is not measured, scanned A, a copy of PreToolUse, Apache-2.0.

A pre-tool hook that runs a Node.js script before the agent uses editing, writing, reading, file-search, or text-search tools.

In plain words
What is it for?
It is for controlling or preparing Edit, Write, Read, Glob, and Grep actions through the listed pre-tool-use script.
Why use it?
It allows checks or other preparation to happen before those tool calls. The provided details do not say what the script checks or changes.

Hook

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the agentmemory plugin — 15 skills, 2 commands, 12 hooks, 1 MCP server shipped together

One of 12 entries in hooks.json — they are configured in one file and arrive together.

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add rmarquesa/agentmemory-offline
Claude Code
/plugin install agentmemory

Or install agentmemory, the plugin that ships this one along with the rest of its 15 skills, 2 commands, 12 hooks, 1 MCP server.

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.

agentmods badge for PreToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/rmarquesa/agentmemory-offline/pre-tool-use.svg)](https://agentmods.dev/hooks/rmarquesa/agentmemory-offline/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/rmarquesa/agentmemory-offline/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/rmarquesa/agentmemory-offline/pre-tool-use.svg" alt="Measured on agentmods" 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 A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

PreToolUse scanned grade A with 0 findings 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 3d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to PreToolUse — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugin/hooks/hooks.json · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Edit|Write|Read|Glob|Grep",
      "hooks": [
        {
          "type": "command",
          "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/pre-tool-use.mjs\""
        }
      ]
    }
  ]
}
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.

  1. 3d ago First seen · 13 lines scan A 1b57165f3bc1

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository rmarquesa/agentmemory-offline (0 stars, last pushed 3d ago), licensed Apache-2.0. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. It is 100% identical to PreToolUse, differing in 0 lines, and is treated as a copy.