matcha: Settings file for Claude Code

.claude/settings.json

matcha is a settings file for Claude Code from plumpslabs/matcha. Its token cost is not measured, scanned A, original, MIT.

A settings file that defines commands to run before and after tool actions and when the agent stops.

In plain words
What is it for?
Running Matcha’s protection, post-write, and stop scripts for Bash, Edit, Write, and MultiEdit operations.
Why use it?
It automates project checks around shell commands and file changes, so those checks do not depend on memory.

Settings file for Claude Code

Written for Claude Code: PreToolUse hook event.

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

One of 5 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 4 are separate, each on its own page.

Reuse

Borrowing it

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

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 matcha

README.md
[![agentmods](https://agentmods.dev/badge/settings/plumpslabs/matcha/settings/github.svg)](https://agentmods.dev/settings/plumpslabs/matcha/settings)
Your own site
<a href="https://agentmods.dev/settings/plumpslabs/matcha/settings"><img src="https://agentmods.dev/badge/settings/plumpslabs/matcha/settings/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 matcha

Your own site · 80×15
<a href="https://agentmods.dev/settings/plumpslabs/matcha/settings"><img src="https://agentmods.dev/badge/settings/plumpslabs/matcha/settings.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

matcha 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 22d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

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 · 50 lines

What it actually says

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash|Edit|Write|MultiEdit",
        "hooks": [
          {
            "type": "command",
            "command": "node hooks/matcha-shield.js",
            "timeout": 5000
          }
        ]
      }
    ],
    "PostToolUse": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "node hooks/matcha-post-write.js",
            "timeout": 3000
          }
        ]
      }
    ],
    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "node hooks/matcha-stop.js",
            "timeout": 5000
          }
        ]
      }
    ],
    "SessionStart": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "node hooks/matcha-session-start.js",
            "timeout": 5000
          }
        ]
      }
    ]
  }
}
Same file

What else settings.json configures

This page is one entry in a file that holds 5. 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. 22d ago Changed · +11 lines 9c3e4e922fbf
  2. 1mo ago First seen · 39 lines scan A cd57bc25dccd

Subscribe to this mod's changes

matcha is a settings file published in the GitHub repository plumpslabs/matcha (2 stars, last pushed 5d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.