agentmods.dev

UserPromptSubmit

A hook that runs a shell command whenever a user submits a prompt, before the coding agent processes it. In this case, it calls an agent-state script when the expected files exist.

In plain words
What is it for?
Use it to trigger project bookkeeping or state tracking before every submitted prompt.
Why use it?
It lets a project update or record agent state automatically at the start of each request without manual intervention.

Hook

11 16d ago A scan tokens not measured copy · 97% MIT
View the source file pillip/claude-dev-kit
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.

agentmods
npx agentmods add hooks/pillip/claude-dev-kit/user-prompt-submit
Clone the repo
git clone --depth 1 https://github.com/pillip/claude-dev-kit
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 97% copy Near-identical to another mod 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 2d 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

This is a copy

97% identical to SubagentStart — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

hooks/hooks.json · 13 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "bash -c '[ -f \"$CLAUDE_PLUGIN_ROOT/project/.claude/hooks/agent_state.py\" ] && HOOK_ROOT=\"$CLAUDE_PROJECT_DIR\" python3 \"$CLAUDE_PLUGIN_ROOT/project/.claude/hooks/agent_state.py\" || true'"
        }
      ]
    }
  ]
}
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. 2d ago First seen · 13 lines scan A 947d0fd51354

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository pillip/claude-dev-kit (11 stars, last pushed 16d 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. It is 97% identical to SubagentStart, differing in 2 lines, and is treated as a copy.

Code GenerationData and AIai-agentsautonomous-codingclaudeclaude-codedeveloper-tools
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