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claude-mpm: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from bobmatnyc/claude-mpm. Its token cost is not measured, scanned A, original, no licence file.

A before-tool hook that runs a command before the agent uses a tool.

In plain words
What is it for?
It helps run the configured claude-hook command before the agent uses tools.
Why use it?
It allows a project to perform a check or setup action before tool use, rather than handling that step manually each time.

Hook for Claude Code

Written for Claude Code: installed under .claude/.

This is bobmatnyc/claude-mpm's own configuration. It tells Claude Code how to work on claude-mpm itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-mpm configures →

One of 9 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 8 are separate, each on its own page.

not rated 150repo +1 6d ago A scan tokens not measured custom licence
View source ↗ bobmatnyc/claude-mpm
Reuse

Borrowing it

Nothing to install: this file belongs to bobmatnyc/claude-mpm. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/bobmatnyc/claude-mpm/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/bobmatnyc/claude-mpm

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.

agentmods badge for PreToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/bobmatnyc/claude-mpm/pre-tool-use.svg)](https://agentmods.dev/hooks/bobmatnyc/claude-mpm/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/bobmatnyc/claude-mpm/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/bobmatnyc/claude-mpm/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. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found 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 7d 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.

.claude/settings.json · 15 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Same file

What else settings.json configures

This page is one entry in a file that holds 9. Installing the file brings all of them; each is measured and scanned on its own page.

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. 7d ago First seen · 15 lines scan A fc847795a7b1

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository bobmatnyc/claude-mpm (150 stars, last pushed 6d ago), with no licence file. 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Multi-AgentOrchestrationaiclaudeclimcp
Related

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PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

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SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

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PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

PreCompact

Runs before the context is compacted for manual and auto tool calls, executing hook-handler.cjs via node (4 commands). From ruvnet/RuView.

ruvnet/RuView · not measured