A pre-tool hook that runs Python commands before an agent uses several tools, including shell commands, editing, writing, and workflow actions. A hook is an automatic step triggered by another action.

Use it to run the listed Python commands before the agent performs supported tool actions.

It provides a place to perform checks or preparation before those tool calls run.

PreToolUse — Hook for Claude Code by dbc-oduffy/coordinator-claude

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/dbc-oduffy/coordinator-claude

Made for: Claude Code.

Or install coordinator, the plugin that ships this one along with the rest of its 47 skills, 18 commands, 57 agents, 13 hooks.

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/dbc-oduffy/coordinator-claude/pre-tool-use/github.svg)](https://agentmods.dev/hooks/dbc-oduffy/coordinator-claude/pre-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/dbc-oduffy/coordinator-claude/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/dbc-oduffy/coordinator-claude/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/dbc-oduffy/coordinator-claude/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/dbc-oduffy/coordinator-claude/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 9d 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.

hooks/hooks.json · 304 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 `hooks.json` configures

This page is one entry in a file that holds 13. 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.

9d ago Changed · +46 lines 87042bd432c1
14d ago Changed · +11 lines 4bb440d0f8ed
15d ago Changed · +17 lines 7088191daeaf
22d ago Changed · +33 lines 21f145b4101d
1mo ago Changed · +17 lines d3eb8fcf7d35
1mo ago Changed · -47 lines be7a6f99674c
1mo ago Changed · -24 lines a37866385048
1mo ago Changed · +22 lines 5bb330e940c8
1mo ago Changed · +11 lines 13ff7c9a9b03
1mo ago First seen · 218 lines scan A 7aa29b928b1a

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository dbc-oduffy/coordinator-claude (5 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.

Claude Code Code review agent-orchestration ai-agents anthropic claude-code-plugin

PreToolUse next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
PreToolUsedbc-oduffy/coordinator-claude	Hook	5	yesterday	none	A	—	Claude Code
SessionStartHabitat-Thinking/ai-literacy-superpowers	Hook	123	5d ago	none	A	—	Claude Code
PreToolUseHabitat-Thinking/ai-literacy-superpowers	Hook	123	5d ago	none	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	today	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	76k	today	Apache-2.0	A	—	Claude Code