What is UserPromptSubmit?

A prompt-submission hook that runs a shell script before the agent receives your prompt.

It is for running the listed user-prompt-submit script whenever a prompt is submitted.

It allows project code to process or prepare each submitted request before the agent works on it.

UserPromptSubmit — Hook for Claude Code by Gentleman-Programming

About the project

Engram is a local or cloud-backed memory system for AI coding agents, provided as a single Go binary with SQLite full-text search and interfaces including a command line, HTTP API, MCP server, and terminal UI. It helps compatible coding agents retain project decisions, bugs, conventions, and other useful context across sessions. The catalogue add-ons configure and operate Engram’s memory workflows.

Gentleman-Programming/engram · 7,815 stars · on GitHub · engram.gentlemanprogramming.com

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add Gentleman-Programming/engram

Claude Code

/plugin install engram

Made for: Claude Code.

Or install engram, the plugin that ships this one along with the rest of its 1 skill, 6 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/gentleman-programming/engram/user-prompt-submit/github.svg)](https://agentmods.dev/hooks/gentleman-programming/engram/user-prompt-submit)

Your own site

<a href="https://agentmods.dev/hooks/gentleman-programming/engram/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/gentleman-programming/engram/user-prompt-submit/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.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/gentleman-programming/engram/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/gentleman-programming/engram/user-prompt-submit.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

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 2mo 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

Copies of this mod

1 near-identical copy found in the catalogue:

UserPromptSubmit — 100% identical, 4 lines differ

plugin/claude-code/hooks/hooks.json · 13 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/scripts/user-prompt-submit.sh\"",
          "timeout": 10
        }
      ]
    }
  ]
}

Same file

What else `hooks.json` configures

This page is one entry in a file that holds 6. 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.

2mo ago Changed dd74ad46bd58
2mo ago First seen · 13 lines scan A 3b0ac14aa854

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository Gentleman-Programming/engram (7,815 stars, last pushed yesterday), licensed MIT. 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.

gentle-shell-package

UserPromptSubmit next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
UserPromptSubmitGentleman-Programming/engram	Hook	7.8k	yesterday	MIT	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	yesterday	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	today	Apache-2.0	A	—	Claude Code
PreToolUseanthropics/claude-cookbooks	Hook	54k	2d ago	MIT	A	—	Claude Code
PostToolUseanthropics/claude-plugins-official	Hook	46k	yesterday	Apache-2.0	A	—	Claude Code

UserPromptSubmit