re_gent: Hook for Claude Code

.claude/settings.json

UserPromptSubmit is a hook for Claude Code from regent-vcs/re_gent. Its token cost is not measured, scanned A, a copy of SessionStart, Apache-2.0.

A prompt-submission hook that runs the command `rgt message-hook user` before the coding agent receives the user's message.

In plain words
What is it for?
Use it when configuring or diagnosing the pre-processing step triggered whenever a user submits a prompt.
Why use it?
It lets the surrounding tooling process or record submitted messages before the agent handles them.

Hook for Claude Code

Written for Claude Code: UserPromptSubmit hook event.

This is regent-vcs/re_gent's own configuration. It tells Claude Code how to work on re_gent 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 re_gent 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.

Reuse

Borrowing it

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

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 UserPromptSubmit

README.md
[![agentmods](https://agentmods.dev/badge/hooks/regent-vcs/re_gent/user-prompt-submit.svg)](https://agentmods.dev/hooks/regent-vcs/re_gent/user-prompt-submit)
Your own site
<a href="https://agentmods.dev/hooks/regent-vcs/re_gent/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/regent-vcs/re_gent/user-prompt-submit.svg" alt="Measured on agentmods" 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 55% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

UserPromptSubmit 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 8d 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.

Origin

This is a copy

55% identical to SessionStart — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/settings.json · 13 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "rgt message-hook user"
        }
      ]
    }
  ]
}
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. 8d ago First seen · 13 lines scan A a9bd384a2ac0

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository regent-vcs/re_gent (791 stars, last pushed 2mo ago), licensed Apache-2.0. 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. It is 55% identical to SessionStart, differing in 8 lines, and is treated as a copy.