PreToolUse

PreToolUse is a hook for Claude Code from joshsmithxrm/power-platform-developer-suite. Its token cost is not measured, scanned C, a copy of PostToolUse, MIT.

A set of checks that runs before an agent edits files or uses shell commands. The supplied rules include protecting the main code branch, protecting selected files, and limiting the length of a project instruction file.

In plain words
What is it for?
It is for running protection scripts before edits, file writes, shell commands, deletion commands, and Git worktree removal.
Why use it?
It can stop risky or disallowed actions before they change the codebase.

Hook for Claude Code

One of 4 entries in settings.json — they are configured in one file and arrive together.

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.

agentmods
npx agentmods add hooks/joshsmithxrm/power-platform-developer-suite/pre-tool-use
Clone the repo
git clone --depth 1 https://github.com/joshsmithxrm/power-platform-developer-suite

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/joshsmithxrm/power-platform-developer-suite/pre-tool-use.svg)](https://agentmods.dev/hooks/joshsmithxrm/power-platform-developer-suite/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/joshsmithxrm/power-platform-developer-suite/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/joshsmithxrm/power-platform-developer-suite/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 C 1 finding. Scan, not verified.
Origin 86% copy Near-identical to another mod in the catalogue.
Security

Grade C, and why

PreToolUse scanned grade C with 1 finding 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 4d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

"matcher": "Bash(rm -rf:*)",
Origin

This is a copy

86% identical to PostToolUse — 187 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.

.claude/settings.json · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "PreToolUse": [
    {
      "matcher": "Edit",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/protect-main-branch.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Write",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/protect-main-branch.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Edit",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/snk-protect.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Write",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/snk-protect.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Edit",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/claudemd-line-cap.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Write",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/claudemd-line-cap.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash(rm:*)",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/rm-guard.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash(rm -rf:*)",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/rm-guard.py\"",
          "timeout": 5
        }
      ]
    },
    {
      "matcher": "Bash(rm -fr:*)",
      "hooks": [
        {
          "type": "command",
          "command": "python \"$CLAUDE_PROJECT_DIR/.claude/hooks/rm-guard.py\"",
         

Read the full file on GitHub · 194 lines

Same file

What else settings.json configures

This page is one entry in a file that holds 4. 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. 4d ago First seen · 194 lines scan C fcbe344c5c11

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository joshsmithxrm/power-platform-developer-suite (5 stars, last pushed 10d ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it C with 1 finding (recursive force delete). It is 86% identical to PostToolUse, differing in 187 lines, and is treated as a copy.