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UserPromptSubmit

UserPromptSubmit is a hook for Claude Code from mubit-ai/claude-plugins. Its token cost is not measured, scanned A, original, Apache-2.0.

Two prompt-submission hooks that run Node.js commands before the agent receives a user's message.

In plain words
What is it for?
It is for running the plugin's prompt-recall and prompt-staging steps on each submitted prompt.
Why use it?
They can retrieve relevant memory and prepare the prompt automatically before the agent starts responding.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the mubit-memory plugin — 15 skills, 1 agent, 13 hooks, 1 MCP server shipped together

One of 13 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 12 are separate, each on its own page.

not rated 12repo 1mo ago A scan tokens not measured original Apache-2.0 archived

Good fit It is for running the plugin's prompt-recall and prompt-staging steps on each submitted prompt.

Compare 6 hooks from other repositories ↓
View source ↗ mubit-ai/claude-plugins
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 mubit-ai/claude-plugins
Claude Code
/plugin install mubit-memory

Made for: Claude Code.

Or install mubit-memory, the plugin that ships this one along with the rest of its 15 skills, 1 agent, 13 hooks, 1 MCP server.

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/mubit-ai/claude-plugins/user-prompt-submit/github.svg)](https://agentmods.dev/hooks/mubit-ai/claude-plugins/user-prompt-submit)
Your own site
<a href="https://agentmods.dev/hooks/mubit-ai/claude-plugins/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/mubit-ai/claude-plugins/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.

agentmods 80×15 button for UserPromptSubmit

Your own site · 80×15
<a href="https://agentmods.dev/hooks/mubit-ai/claude-plugins/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/mubit-ai/claude-plugins/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:

integrations/claude-code/hooks/hooks.json · 24 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "node",
          "timeout": 3,
          "args": [
            "${CLAUDE_PLUGIN_ROOT}/hooks/dist/prompt-recall.mjs"
          ]
        },
        {
          "type": "command",
          "command": "node",
          "timeout": 3,
          "args": [
            "${CLAUDE_PLUGIN_ROOT}/hooks/dist/stage-prompt.mjs"
          ]
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 13. 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. 2mo ago First seen · 24 lines scan A 028e9f77b485

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository mubit-ai/claude-plugins (12 stars, last pushed 1mo 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.

Related

UserPromptSubmit compared with hooks from other repositories

UserPromptSubmit next to 6 hooks from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
UserPromptSubmitmubit-ai/claude-pluginsHook121mo agoApache-2.0A—Claude Code
PostToolUsesupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartsupabase/supabaseHook115kyesterdayApache-2.0A—Claude Code
SessionStartgoogle-gemini/gemini-cliHook109kyesterdayApache-2.0A—Claude Code
PreToolUseapache/supersetHook75kyesterdayApache-2.0A—Claude Code
PreToolUseanthropics/claude-cookbooksHook54k2d agoMITA—Claude Code
PostToolUseanthropics/claude-plugins-officialHook46kyesterdayApache-2.0A—Claude Code