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PreToolUse

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

A pre-tool hook that runs a shell script before the agent edits files or notebooks. It applies guard tests before Edit, Write, and NotebookEdit actions.

In plain words
What is it for?
Use it to protect file-editing actions with the repository's guard-tests.sh script.
Why use it?
It can catch a failing test or other guard condition before the agent changes the project.

Hook for Claude Code

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

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 sdlc plugin — 1 skill, 8 commands, 1 agent, 1 hook shipped together

not rated 36repo +1 yesterday A scan tokens not measured original MIT

Good fit Use it to protect file-editing actions with the repository's guard-tests.sh script.

Compare 6 hooks from other repositories ↓
View source ↗ artemnovichkov/skills skills.sh
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 artemnovichkov/skills
Claude Code
/plugin install sdlc

Made for: Claude Code.

Or install sdlc, the plugin that ships this one along with the rest of its 1 skill, 8 commands, 1 agent, 1 hook.

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

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.

skills/sdlc/hooks/hooks.json · 13 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Edit|Write|NotebookEdit",
      "hooks": [
        {
          "type": "command",
          "command": "bash \"$CLAUDE_PLUGIN_ROOT/hooks/scripts/guard-tests.sh\""
        }
      ]
    }
  ]
}
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. yesterday First seen · 13 lines scan A 09040e959a3a

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository artemnovichkov/skills (36 stars, last pushed yesterday), 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 2026-09-07.

Testingaicodexmarketplacemcpplugins
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Bash tool calls, executing filter-test-output.sh. From shrwnsan/vibekit-claude-plugins.

shrwnsan/vibekit-claude-plugins · not measured

11

Runs on the 11 event for Write tool calls, executing type-check.js via node. From rohitg00/awesome-claude-code-toolkit.

rohitg00/awesome-claude-code-toolkit · not measured

12

Runs on the 12 event for Edit tool calls, executing type-check.js via node. From rohitg00/awesome-claude-code-toolkit.

rohitg00/awesome-claude-code-toolkit · not measured

22

Runs on the 22 event, executing stop-check.js via node. From rohitg00/awesome-claude-code-toolkit.

rohitg00/awesome-claude-code-toolkit · 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 on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured