UserPromptSubmit

A prompt-time hook that runs a setup script before the coding agent receives your request, then routes the request through the abcd tool if available.

In plain words
What is it for?
Use it to initialize abcd and apply its prompt-routing rules whenever you submit a prompt.
Why use it?
It prepares or locates the required tool automatically and reports an error when the tool cannot be provided.

Hook

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/intentdriven/abcd/user-prompt-submit
Clone the repo
git clone --depth 1 https://github.com/intentdriven/abcd
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 yesterday.

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 · 12 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "r=\"${CLAUDE_PLUGIN_ROOT:-}\"; [ -n \"$r\" ] || exit 0; if [ ! -x \"$r/abcd\" ] && [ -x \"$r/hooks/bootstrap.sh\" ] && [ -z \"$(find \"$r/.bootstrap.attempt\" -maxdepth 0 -mmin -10 2>/dev/null)\" ]; then : > \"$r/.bootstrap.attempt\" 2>/dev/null || true; \"$r/hooks/bootstrap.sh\" >/dev/null 2>&1 </dev/null || true; fi; g=\"\"; [ -x \"$r/abcd\" ] && g=\"$r/abcd\"; if [ -z \"$g\" ] && command -v abcd >/dev/null 2>&1; then g=abcd; fi; if [ -n \"$g\" ]; then exec \"$g\" hook prompt-router; fi; printf '%s\\n' \"abcd: the plugin binary is missing and could not be provisioned, so the rules loader is inactive for this prompt — hooks/bootstrap.sh installs it when the session has network access, or install per https://github.com/intentdriven/abcd#install\" >&2; exit 1"
        }
      ]
    }
  ]
}
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. yesterday First seen · 12 lines scan A 26528d57181f

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository intentdriven/abcd (3 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 2026-08-31.