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openlogos: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from miniidealab/openlogos. Its token cost is not measured, scanned A, original, Apache-2.0.

A safety check that runs before an agent edits files or runs shell commands through Edit, Write, or Bash tools. It runs the project's guard-check script first.

In plain words
What is it for?
Use it to place a project-specific check before file changes and Bash commands.
Why use it?
It can prevent those actions from proceeding when the project's own checks reject them. The input does not explain what rules the script enforces.

Hook for Claude Code

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

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

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.

not rated 428repo +65 changed 20d ago A scan tokens not measured original Apache-2.0
View source ↗ miniidealab/openlogos
Reuse

Borrowing it

Nothing to install: this file belongs to miniidealab/openlogos. 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/miniidealab/openlogos/master/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/miniidealab/openlogos

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/miniidealab/openlogos/pre-tool-use/github.svg)](https://agentmods.dev/hooks/miniidealab/openlogos/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/miniidealab/openlogos/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/miniidealab/openlogos/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/miniidealab/openlogos/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/miniidealab/openlogos/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 20d 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 · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Edit|Write|MultiEdit|NotebookEdit|Bash|PowerShell",
      "hooks": [
        {
          "type": "command",
          "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/openlogos/bin/guard-check"
        }
      ]
    }
  ]
}
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. 20d ago Changed 0014c42605fe
  2. 1mo ago Changed fba7073b959f
  3. 1mo ago First seen · 13 lines scan A 849f9df01e6b

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository miniidealab/openlogos (428 stars, last pushed 9d ago), licensed Apache-2.0. 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.

Security
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

PostToolUse

Runs after a tool call finishes for Bash tool calls, executing hooks.sh via sh (3 commands). From anthropics/claude-plugins-official.

anthropics/claude-plugins-official · not measured