UserPromptSubmit

UserPromptSubmit is a hook for Claude Code from grafana/agento11y. Its token cost is not measured, scanned A, original, Apache-2.0.

A hook that runs a shell command whenever you submit a prompt, before the coding agent processes it. A hook is an automatic action tied to an event.

In plain words
What is it for?
It is for invoking the configured Agento11y or Sigil prompt check before the agent sees each submission.
Why use it?
It lets a local observability check run at the start of every prompt without requiring a separate manual command. The configured command can report success or failure within a time limit.

Hook for Claude Code ✓ vendor

Written for Claude Code: UserPromptSubmit hook event. Also seen: mentions Codex.

One of 5 entries in hooks.json — they are configured in one file and arrive together.

Good fit It is for invoking the configured Agento11y or Sigil prompt check before…

Compare 6 hooks from other repositories ↓
Install with agentmods
npx agentmods add hooks/grafana/agento11y/user-prompt-submit
About the project

Grafana Agent Observability is an SDK and plugin collection that collects telemetry from coding agents and AI agents built into applications, including sessions, tool calls, traces, tokens, costs, generations, and evaluations. Developers use it to monitor coding-agent usage or instrument agents in their own services, with SDKs for several programming languages. The catalogue add-ons help configure and use this observability workflow with coding agents.

grafana/agento11y · 99 stars · on GitHub · grafana.com

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/grafana/agento11y

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/grafana/agento11y/user-prompt-submit.svg)](https://agentmods.dev/hooks/grafana/agento11y/user-prompt-submit)
Your own site
<a href="https://agentmods.dev/hooks/grafana/agento11y/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/grafana/agento11y/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.

plugins/codex/hooks/hooks.json · 13 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "agento11y codex hook || sigil codex hook",
          "timeout": 10
        }
      ]
    }
  ]
}
Same file

What else hooks.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. 7d ago First seen · 13 lines scan A 392cf840f707

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository grafana/agento11y (99 stars, last pushed today), 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.