Use it to enforce the project’s deployment rule for clasp push and deploy commands.

It stops deployments from bypassing the repository’s required operations process. This reduces the chance of releasing code through an unapproved command.

How a2uicatalog/a2ui configures Claude Code

a2ui: Hook for Claude Code

.claude/settings.json

PreToolUse is a hook for Claude Code from a2uicatalog/a2ui. Its token cost is not measured, scanned A, original, MIT.

A pre-tool hook that runs a command before the agent uses Bash. It checks commands involving clasp, a tool for deploying Google Apps Script code, and blocks certain deployments unless they use the project’s declared release process.

In plain words

What is it for?: Use it to enforce the project’s deployment rule for clasp push and deploy commands.
Why use it?: It stops deployments from bypassing the repository’s required operations process. This reduces the chance of releasing code through an unapproved command.

Written for Claude Code: PreToolUse hook event.

This is a2uicatalog/a2ui's own configuration. It tells Claude Code how to work on a2ui 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 a2ui configures →

One of 2 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 1 are separate, each on its own page.

Reuse

Borrowing it

Nothing to install: this file belongs to a2uicatalog/a2ui. 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/a2uicatalog/a2ui/main/.claude/settings.json

Clone the repo

git clone --depth 1 https://github.com/a2uicatalog/a2ui

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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/a2uicatalog/a2ui/pre-tool-use/github.svg)](https://agentmods.dev/hooks/a2uicatalog/a2ui/pre-tool-use)

Your own site

<a href="https://agentmods.dev/hooks/a2uicatalog/a2ui/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/a2uicatalog/a2ui/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.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/a2uicatalog/a2ui/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/a2uicatalog/a2ui/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 2mo 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 · 14 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "jq -c 'if ((.tool_input.command // \"\") | test(\"clasp (push|deploy)\")) and ((.tool_input.command // \"\") | test(\"ops\\\\.py\") | not) then {hookSpecificOutput:{hookEventName:\"PreToolUse\",permissionDecision:\"deny\",permissionDecisionReason:\"clasp push/deploy must go through a declared process: python3 ops/ops.py run renderer-release (see project.yaml processes)\"}} else empty end'",
          "statusMessage": "ops discipline: clasp gate"
        }
      ]
    }
  ]
}

Same file

What else `settings.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.

Settings file a2ui A not measured

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.

2mo ago First seen · 14 lines scan A 4fc85b91ae81

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository a2uicatalog/a2ui (6 stars, last pushed 5d 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.

a2ui agent agent-skills ai-agents apps-script claude

PreToolUse next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
PreToolUsea2uicatalog/a2ui	Hook	6	5d ago	MIT	A	—	Claude Code
StopFailuremicrosoft/intelligent-terminal	Hook	2.1k	yesterday	MIT	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	today	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	today	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	today	Apache-2.0	A	—	Claude Code
PreToolUseanthropics/claude-cookbooks	Hook	54k	2d ago	MIT	A	—	Claude Code