Claude: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from johanolofsson72/Claude. Its token cost is not measured, scanned A, original, no licence file.

A pre-tool hook that runs guard scripts before selected reading, editing, writing, and shell commands. Hooks are automatic checks that run around an agent’s actions.

In plain words
What is it for?
Use it in projects that need the listed specification, pipeline, core-machinery, owed-tick, and shell-write checks before tool calls.
Why use it?
It can check the project’s rules and workflow state before changes or commands happen, helping prevent actions that violate those checks.

Hook for Claude Code

Written for Claude Code: installed under .claude/.

This is johanolofsson72/Claude's own configuration. It tells Claude Code how to work on Claude 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 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.

Reuse

Borrowing it

Nothing to install: this file belongs to johanolofsson72/Claude. 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/johanolofsson72/Claude/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/johanolofsson72/Claude

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/johanolofsson72/claude/pre-tool-use/github.svg)](https://agentmods.dev/hooks/johanolofsson72/claude/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/johanolofsson72/claude/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/johanolofsson72/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.

agentmods 80×15 button for PreToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/johanolofsson72/claude/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/johanolofsson72/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 18d 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 · 111 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

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. 18d ago Changed d6f8e81cd2dc
  2. 20d ago Changed · +9 lines 0361c225b56f
  3. 21d ago Changed · +18 lines scan C → A 999a4868e670
  4. 22d ago Changed · +10 lines aa768c9878be
  5. 24d ago Changed 186fff252c0c
  6. 1mo ago Changed b382498c85c0
  7. 1mo ago First seen · 74 lines scan C 6f323996562a

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository johanolofsson72/Claude (2 stars, last pushed 5d 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 2026-08-31.