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httpjail: Hook for Claude Code

.claude/settings.json

PostToolUse is a hook for Claude Code from coder/httpjail. Its token cost is not measured, scanned A, original, CC0-1.0.

A post-tool hook that runs `cargo fmt` after Edit, MultiEdit, or Write tool calls. A hook is an automatic action triggered by another action.

In plain words
What is it for?
Use it in the httpjail Rust project to apply formatting after file edits and writes.
Why use it?
It formats Rust code immediately after an agent changes it, reducing formatting drift and the need for a separate manual step.

Hook for Claude Code

Written for Claude Code: PostToolUse hook event.

This is coder/httpjail's own configuration. It tells Claude Code how to work on httpjail 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 httpjail 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.

not rated 961repo 4mo ago A scan tokens not measured original CC0-1.0
View source ↗ coder/httpjail
Reuse

Borrowing it

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

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 PostToolUse

README.md
[![agentmods](https://agentmods.dev/badge/hooks/coder/httpjail/post-tool-use/github.svg)](https://agentmods.dev/hooks/coder/httpjail/post-tool-use)
Your own site
<a href="https://agentmods.dev/hooks/coder/httpjail/post-tool-use"><img src="https://agentmods.dev/badge/hooks/coder/httpjail/post-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 PostToolUse

Your own site · 80×15
<a href="https://agentmods.dev/hooks/coder/httpjail/post-tool-use"><img src="https://agentmods.dev/badge/hooks/coder/httpjail/post-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

PostToolUse 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 today.

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 · 13 lines

What it actually says

{
  "PostToolUse": [
    {
      "matcher": "Edit|MultiEdit|Write",
      "hooks": [
        {
          "type": "command",
          "command": "cargo fmt"
        }
      ]
    }
  ]
}
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. today First seen · 13 lines scan A 085517ed2c9c

Subscribe to this mod's changes

PostToolUse is a hook published in the GitHub repository coder/httpjail (961 stars, last pushed 4mo ago), licensed CC0-1.0. 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 2026-09-11.

LanguagesRustaifirewall
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PreToolUse

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PostToolUse

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