agentmods.dev

UserPromptSubmit

Automation hooks that run two Python scripts whenever a user submits a prompt: one tracks the turn and the other adds a context reminder.

In plain words
What is it for?
Use them to record prompt activity and run a context-nudging script before the coding agent processes the request.
Why use it?
They perform setup work automatically at the start of each prompt, so it does not have to be triggered manually.

Hook

Part of the claude-dcp plugin — 2 skills, 7 hooks shipped together

15 4mo ago A scan tokens not measured original MIT
View the source file exploreborders/claude-dcp
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/exploreborders/claude-dcp/user-prompt-submit
Clone the repo
git clone --depth 1 https://github.com/exploreborders/claude-dcp

Or install claude-dcp, the plugin that ships this one along with the rest of its 2 skills, 7 hooks.

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 · 22 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3 ${CLAUDE_PLUGIN_ROOT}/scripts/track_turn.py",
          "timeout": 5
        }
      ]
    },
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3 ${CLAUDE_PLUGIN_ROOT}/scripts/context_nudge.py",
          "timeout": 5
        }
      ]
    }
  ]
}
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 · 22 lines scan A fa71f920e7e4

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository exploreborders/claude-dcp (15 stars, last pushed 4mo 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 2026-08-30.

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