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PreToolUse

PreToolUse is a hook for coding agents from cbdreamer11/CB-loop-kit-claude-plugin. Its token cost is not measured, scanned A, original, MIT.

A pre-tool hook that runs a shell script before the agent uses the Bash tool. The script is named guard-publish.sh.

In plain words
What is it for?
Use it as a before-action guard for Bash calls, with a maximum run time of 10 seconds.
Why use it?
It gives the script a chance to check or stop a Bash action before it runs. The provided description does not say exactly what checks the script performs.

Hook

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the loop-kit plugin — 7 skills, 6 agents, 2 hooks shipped together

One of 2 entries in hooks.json — they are configured in one file and arrive together.

not rated 8 1mo ago A scan tokens not measured original MIT
View the source file cbdreamer11/CB-loop-kit-claude-plugin
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add cbdreamer11/CB-loop-kit-claude-plugin
Claude Code
/plugin install loop-kit

Or install loop-kit, the plugin that ships this one along with the rest of its 7 skills, 6 agents, 2 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.

agentmods badge for PreToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/cbdreamer11/cb-loop-kit-claude-plugin/pre-tool-use.svg)](https://agentmods.dev/hooks/cbdreamer11/cb-loop-kit-claude-plugin/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/cbdreamer11/cb-loop-kit-claude-plugin/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/cbdreamer11/cb-loop-kit-claude-plugin/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 A 0 findings. Scan, not verified.
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 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.

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 · 14 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "sh \"${CLAUDE_PLUGIN_ROOT}/hooks/guard-publish.sh\"",
          "timeout": 10
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 2. 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 · 14 lines scan A 00403ff3a7a1

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository cbdreamer11/CB-loop-kit-claude-plugin (8 stars, last pushed 1mo 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 2026-08-31.

Developer Workflowagentic-workflowai-agentsclaude-codeclaude-code-pluginclaude-skills
Related

Other hooks, from other repositories

PostToolUse

Runs after a tool call finishes, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured

PostToolUseFailure

Runs when a tool call fails, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured

Notification

Runs when the agent sends a notification, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured

SessionStart

Runs when a session starts, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured

SubagentStop

Runs when a subagent finishes, executing rot-router.ps1 and prover-remind.ps1 with --stdin (2 commands). From Nova-Violet-Role/RoT-MoE.

Nova-Violet-Role/RoT-MoE · not measured