agentmods.dev

webjs: Hook for Claude Code

.claude/settings.json

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

A set of automatic checks that run before an agent writes files, edits code, or runs shell commands. The checks enforce project rules such as using a separate worktree, avoiding raw HTML elements, and including tests, documentation, scaffolding, and runtime support with source changes.

In plain words
What is it for?
Use it to guard agent actions in a software repository. It is for enforcing editing, testing, documentation, scaffolding, and compatibility requirements before changes happen.
Why use it?
It catches common workflow and code-quality mistakes before they are made. This reduces changes that break project conventions or are difficult to review and maintain.

Hook for Claude Code

Written for Claude Code: PreToolUse hook event. Also seen: reads .claude/ paths; names the NotebookEdit tool.

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

One of 4 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 3 are separate, each on its own page.

not rated 27repo changed 13d ago A scan tokens not measured original MIT
View source ↗ webjsdev/webjs webjs.dev
Reuse

Borrowing it

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

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/webjsdev/webjs/pre-tool-use/github.svg)](https://agentmods.dev/hooks/webjsdev/webjs/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/webjsdev/webjs/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/webjsdev/webjs/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/webjsdev/webjs/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/webjsdev/webjs/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 13d 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 · 60 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Write|Edit|MultiEdit|NotebookEdit",
      "hooks": [
        {
          "type": "command",
          "command": ".claude/hooks/require-worktree-for-edits.sh"
        }
      ]
    },
    {
      "matcher": "Write|Edit|MultiEdit",
      "hooks": [
        {
          "type": "command",
          "command": ".claude/hooks/block-raw-htmlelement.sh"
        }
      ]
    },
    {
      "matcher": "Write|Edit|MultiEdit|NotebookEdit|Bash",
      "hooks": [
        {
          "type": "command",
          "command": ".claude/hooks/block-prose-punctuation.sh"
        }
      ]
    },
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": ".claude/hooks/block-admin-merge.sh"
        },
        {
          "type": "command",
          "command": ".claude/hooks/require-tests-with-src.sh"
        },
        {
          "type": "command",
          "command": ".claude/hooks/require-docs-with-src.sh"
        },
        {
          "type": "command",
          "command": ".claude/hooks/require-scaffold-with-src.sh"
        },
        {
          "type": "command",
          "command": ".claude/hooks/require-bun-parity-with-runtime-src.sh"
        },
        {
          "type": "command",
          "command": ".claude/hooks/block-install-in-linked-worktree.sh"
        }
      ]
    }
  ]
}
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. 13d ago Changed · +4 lines 183ecf17470f
  2. 1mo ago First seen · 56 lines scan A 0ee864a54655

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository webjsdev/webjs (27 stars, last pushed 13d 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.

bunfullstack-frameworkjavascript-frameworkno-buildnodejsprogressive-enhancement
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, executing session-start.mjs via node. From letsgojh0810/hud-plugin.

letsgojh0810/hud-plugin · not measured

SessionStart

Runs when a session starts on startup, clear and compact, executing smart-install.js and bun-wrapper.cjs via node (4 commands). From nhevers/MoltBrain.

nhevers/MoltBrain · not measured

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