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sage: Hook for Claude Code

.claude/settings.json

UserPromptSubmit is a hook for Claude Code from l33tdawg/sage. Its token cost is not measured, scanned A, original, Apache-2.0.

A command hook that runs a shell script whenever you submit a prompt, before the coding agent receives it. The script is stored in the project's .claude/hooks directory.

In plain words
What is it for?
Use it for tasks that should happen on every submitted prompt, such as running project-specific preparation or validation commands.
Why use it?
It lets a project automatically prepare, check, or modify input before each request reaches the agent. The supplied configuration only identifies the script and its five-second time limit.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PROJECT_DIR} variable.

This is l33tdawg/sage's own configuration. It tells Claude Code how to work on sage 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 sage configures →

One of 7 entries in settings.json — they are configured in one file and arrive together.

not rated 245repo +1 2d ago A scan tokens not measured original Apache-2.0
View source ↗ l33tdawg/sage orcid.org
Reuse

Borrowing it

Nothing to install: this file belongs to l33tdawg/sage. 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/l33tdawg/sage/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/l33tdawg/sage

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/l33tdawg/sage/user-prompt-submit.svg)](https://agentmods.dev/hooks/l33tdawg/sage/user-prompt-submit)
Your own site
<a href="https://agentmods.dev/hooks/l33tdawg/sage/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/l33tdawg/sage/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 original No closer match found 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 7d 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 · 13 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "command": "bash \"${CLAUDE_PROJECT_DIR}/.claude/hooks/sage-user-prompt.sh\"",
          "timeout": 5,
          "type": "command"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 7. 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. 7d ago First seen · 13 lines scan A 33b67241dfd2

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository l33tdawg/sage (245 stars, last pushed 2d 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, running ase hook session-start. From rse/ase.

rse/ase · not measured

SessionEnd

Runs when a session ends, running ase hook session-end. From rse/ase.

rse/ase · not measured

PreToolUse

Runs before the agent uses a tool, running ase hook pre-tool-use. From rse/ase.

rse/ase · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, running ase hook user-prompt-submit. From rse/ase.

rse/ase · not measured

Stop

Runs when the agent finishes a response, running ase hook stop. From rse/ase.

rse/ase · not measured

PostCompact

Runs after the context is compacted, running bar-hook PostCompact. From bar181/bar-observatory.

bar181/bar-observatory · not measured