probity: Settings file for Claude Code

.claude/settings.json

probity is a settings file for Claude Code from nizos/probity. Its token cost is not measured, scanned B, original, MIT.

A project settings file that runs a command before Bash, file-writing, or editing tools are used. It also prevents changes to selected configuration files.

In plain words
What is it for?
It is for adding a pre-use check to an AI coding agent and restricting edits to Probity and agent-settings files.
Why use it?
It lets a project check or record tool use before changes happen and protects its own settings from being edited accidentally.

Settings file for Claude Code

Written for Claude Code: ${CLAUDE_PROJECT_DIR} variable. Also seen: names the NotebookEdit tool.

This is nizos/probity's own configuration. It tells Claude Code how to work on probity 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 probity 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 nizos/probity. 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/nizos/probity/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/nizos/probity

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 probity

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

Your own site · 80×15
<a href="https://agentmods.dev/settings/nizos/probity/settings"><img src="https://agentmods.dev/badge/settings/nizos/probity/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 B 1 finding. 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 B, and why

probity scanned grade B with 1 finding 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 1mo 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

"deny": ["Edit(**/probity.config.ts)", "Edit(**/.claude/settings*.json)"]
.claude/settings.json · 19 lines

What it actually says

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash|Write|Edit|NotebookEdit",
        "hooks": [
          {
            "type": "command",
            "command": "npx @nizos/probity --agent claude-code --debug ${CLAUDE_PROJECT_DIR}/.claude/probity.jsonl"
          }
        ]
      }
    ]
  },
  "permissions": {
    "deny": ["Edit(**/probity.config.ts)", "Edit(**/.claude/settings*.json)"]
  }
}
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.

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. 1mo ago Changed · -5 lines 275a85cc72ba
  2. 1mo ago First seen · 24 lines scan B 8b13d5a2cacc

Subscribe to this mod's changes

probity is a settings file published in the GitHub repository nizos/probity (238 stars, last pushed yesterday), 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 B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.