agentmods.dev

UserPromptSubmit

UserPromptSubmit is a hook for coding agents from shakestzd/contextune. Its token cost is not measured, scanned A, original, MIT.

A prompt-time pair of scripts that runs before the coding agent reads your request. One adds current context, and the other detects whether your wording matches a slash command.

In plain words
What is it for?
Use it to add context to prompts and identify possible commands for later verification.
Why use it?
It reduces the need to repeat project context and helps recognise commands expressed in ordinary language.

Hook

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 contextune plugin — 8 skills, 14 commands, 5 agents, 6 hooks, 1 MCP server shipped together

One of 6 entries in hooks.json — they are configured in one file and arrive together.

not rated 5 8mo ago A scan tokens not measured original MIT
View the source file shakestzd/contextune
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 shakestzd/contextune
Claude Code
/plugin install contextune

Or install contextune, the plugin that ships this one along with the rest of its 8 skills, 14 commands, 5 agents, 6 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/shakestzd/contextune/user-prompt-submit.svg)](https://agentmods.dev/hooks/shakestzd/contextune/user-prompt-submit)
Your own site
<a href="https://agentmods.dev/hooks/shakestzd/contextune/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/shakestzd/contextune/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. Scan, not verified.
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 3d 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.

hooks/hooks.json · 21 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "node ${CLAUDE_PLUGIN_ROOT}/hooks/context_injector.js",
          "timeout": 1000,
          "description": "Inject current context for grounded research"
        },
        {
          "type": "command",
          "command": "uv run ${CLAUDE_PLUGIN_ROOT}/hooks/user_prompt_submit.py",
          "timeout": 5000,
          "description": "SlashSense intent detection"
        }
      ]
    }
  ]
}
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.

  1. 3d ago First seen · 21 lines scan A f6d825d368eb

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository shakestzd/contextune (5 stars, last pushed 8mo ago), 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 2026-08-31.

Cost Optimizationai-assistantautomationclaude-codecontext-engineeringgit-worktrees
Related

Other hooks, from other repositories

PreCompact

Runs before the context is compacted, executing save-worktree-state.py via python3. From carmentacollective/carmenta.

carmentacollective/carmenta · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured