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amethyst: Hook for Claude Code

.claude/settings.json

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

A pre-tool hook configuration that runs a shell script before Bash commands and GitHub pull-request creation.

In plain words
What is it for?
Running the repository's pre-push-spotless.sh check before Bash use or creating a GitHub pull request.
Why use it?
It adds an automatic check before actions that may push code or open a pull request.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PROJECT_DIR variable.

This is vitorpamplona/amethyst's own configuration. It tells Claude Code how to work on amethyst 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 amethyst 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 1.6krepo +5 changed 25d ago A scan tokens not measured original MIT
View source ↗ vitorpamplona/amethyst amethyst.social
About the project

Amethyst is an Android client for Nostr, a social network protocol that lets people control their own social activity and connections. People use it to read and publish Nostr content, follow accounts, and exchange encrypted direct messages from Android and other supported platforms. The catalogue add-ons support workflows for developing or operating the client.

vitorpamplona/amethyst · 1,620 stars · on GitHub · amethyst.social

Reuse

Borrowing it

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

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/vitorpamplona/amethyst/pre-tool-use/github.svg)](https://agentmods.dev/hooks/vitorpamplona/amethyst/pre-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/vitorpamplona/amethyst/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/vitorpamplona/amethyst/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/vitorpamplona/amethyst/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/vitorpamplona/amethyst/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 25d 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 · 29 lines

What it actually says

{
  "PreToolUse": [
    {
      "matcher": "Bash|mcp__github__create_pull_request",
      "hooks": [
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/tools/agent-hooks/pre-push-spotless.sh",
          "timeout": 180
        },
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/tools/agent-hooks/pre-push-orphan-strings.sh",
          "timeout": 30
        },
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/tools/agent-hooks/pre-push-compose-escaping.sh",
          "timeout": 30
        },
        {
          "type": "command",
          "command": "$CLAUDE_PROJECT_DIR/tools/agent-hooks/pre-push-agent-config.sh",
          "timeout": 30
        }
      ]
    }
  ]
}
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. 25d ago Changed · +5 lines 6b4386fcc8f0
  2. 2mo ago Changed · +10 lines 7592db2f13b9
  3. 2mo ago First seen · 14 lines scan A 690e006119e3

Subscribe to this mod's changes

PreToolUse is a hook published in the GitHub repository vitorpamplona/amethyst (1,620 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 2026-08-30.

androidkotlinnostrsocial-network
Related

PreToolUse compared with hooks from other repositories

PreToolUse next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
PreToolUsevitorpamplona/amethystHook1.6kyesterdayMITA—Claude Code
PostToolUsesupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartsupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109kyesterdayApache-2.0A—Claude Code
PreToolUseapache/supersetHook75ktodayApache-2.0A—Claude Code
PreToolUseanthropics/claude-cookbooksHook54k2d agoMITA—Claude Code
PostToolUseanthropics/claude-plugins-officialHook46kyesterdayApache-2.0A—Claude Code