agentmods.dev

coograph: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from paullukic/coograph. Its token cost is not measured, scanned A, original, MIT.

A set of pre-tool hooks that run checks before an agent uses shell commands or edits files. Hooks are automatic scripts triggered by specified actions.

In plain words
What is it for?
Use it to add safeguards and logging before Bash, file-editing, writing, multi-edit, or notebook-edit operations.
Why use it?
It records shell commands, blocks generated-file edits, and warns when an edit may exceed the intended scope.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PROJECT_DIR variable. Also seen: names the NotebookEdit tool.

This is paullukic/coograph's own configuration. It tells Claude Code how to work on coograph 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 coograph configures →

One of 5 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 4 are separate, each on its own page.

not rated 17repo changed 1mo ago A scan tokens not measured original MIT
View source ↗ paullukic/coograph coograph.com
Reuse

Borrowing it

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

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
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Your own site
<a href="https://agentmods.dev/hooks/paullukic/coograph/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/paullukic/coograph/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/paullukic/coograph/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/paullukic/coograph/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 original 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 1mo 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 · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/log-bash.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/defect-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/no-new-deps-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/openspec-gate-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/gotcha-surface.py\""
        }
      ]
    },
    {
      "matcher": "Edit|Write|MultiEdit|NotebookEdit",
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/block-generated.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/warn-scope.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/defect-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/no-new-deps-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/openspec-gate-warn.py\""
        },
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/gotcha-surface.py\""
        }
      ]
    },
    {
      "matcher": "Skill|Task|Agent",
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"$CLAUDE_PROJECT_DIR/.claude/hooks/defect-warn.py\""
        }
      ]
    },
    {
      "matcher": "PowerShell",
      "hooks": [
        {
          "type": "command",
          "command": "

Read the full file on GitHub · 88 lines

Same file

What else settings.json configures

This page is one entry in a file that holds 5. 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. 1mo ago Changed · +12 lines 9090f70716e0
  2. 1mo ago Changed · +12 lines c0abb7325439
  3. 1mo ago Changed · +38 lines 1f03fd361c2b
  4. 2mo ago First seen · 26 lines scan A e89b2df78c8f

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository paullukic/coograph (17 stars, last pushed 12d ago), licensed MIT. 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.

ai-agentsai-codingai-optimizationai-toolscode-graphtoken-ai-optimizator
Related

PreToolUse compared with hooks from other repositories

PreToolUse next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
PreToolUsepaullukic/coographHook1712d agoMITA—Claude Code
StopHthSolid/claude-dejavuHook65mo agononeA—Claude Code
PreCompactHthSolid/claude-dejavuHook65mo agononeA—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