PreToolUse

PreToolUse is a hook for Claude Code from PabloCoello/dotmesh. Its token cost is not measured, scanned A, original, no licence file.

A set of checks that runs before an agent uses tools such as Bash, file editing, or asking a user a question.

In plain words
What is it for?
It runs seven listed commands covering dangerous Git actions, approvals, review reminders, skill loading, questions, and handoff signals.
Why use it?
It adds an approval and safety checkpoint before tool actions begin.

Hook for Claude Code

Written for Claude Code: installed under .claude/.

One of 6 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 5 are separate, each on its own page.

Good fit It runs seven listed commands covering dangerous Git actions, approvals, review reminders, skill loading, questions, and handoff signals.

Compare 6 hooks from other repositories ↓
Install with agentmods
npx agentmods add hooks/pablocoello/dotmesh/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/PabloCoello/dotmesh

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/pablocoello/dotmesh/pre-tool-use/github.svg)](https://agentmods.dev/hooks/pablocoello/dotmesh/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/pablocoello/dotmesh/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/pablocoello/dotmesh/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.

agentmods 80×15 button for PreToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/pablocoello/dotmesh/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/pablocoello/dotmesh/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 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 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.

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/.claude/settings.json · 39 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Same file

What else settings.json configures

This page is one entry in a file that holds 6. 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. 2mo ago Changed · -16 lines d190d0533ed6
  2. 2mo ago First seen · 55 lines scan A 3e470841c121

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository PabloCoello/dotmesh (2 stars, last pushed yesterday), 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 2026-08-31.

Related

PreToolUse compared with hooks from other repositories

PreToolUse next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
PreToolUsePabloCoello/dotmeshHook2yesterdaynoneA—Claude Code
PostToolUsesupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartsupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109kyesterdayApache-2.0A—Claude Code
PreToolUseapache/supersetHook75kyesterdayApache-2.0A—Claude Code
PreToolUseanthropics/claude-cookbooksHook54k2d agoMITA—Claude Code
PostToolUseanthropics/claude-plugins-officialHook46kyesterdayApache-2.0A—Claude Code