What is UserPromptSubmit?

A hook configuration that runs the `stash hook` command whenever a user submits a prompt, before the coding agent sees it. Stash is the referenced tool or project that provides this command.

Use it to trigger Stash's prompt-submission hook automatically; the specific work performed by that hook is not described here.

It lets the Stash hook perform its configured pre-processing before each prompt reaches the agent.

UserPromptSubmit — Hook for Claude Code by jaredgizersky/stash

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.

Clone the repo

git clone --depth 1 https://github.com/jaredgizersky/stash

Made for: Claude Code.

Or install stash, the plugin that ships this one along with the rest of its 1 hook.

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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/jaredgizersky/stash/user-prompt-submit/github.svg)](https://agentmods.dev/hooks/jaredgizersky/stash/user-prompt-submit)

Your own site

<a href="https://agentmods.dev/hooks/jaredgizersky/stash/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/jaredgizersky/stash/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.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/jaredgizersky/stash/user-prompt-submit"><img src="https://agentmods.dev/badge/hooks/jaredgizersky/stash/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 1mo 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 · 12 lines

What it actually says

{
  "UserPromptSubmit": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "stash hook"
        }
      ]
    }
  ]
}

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.

1mo ago First seen · 12 lines scan A 5ac21210f1d2

Subscribe to this mod's changes

UserPromptSubmit is a hook published in the GitHub repository jaredgizersky/stash (11 stars, last pushed 5mo 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.

Claude Code cli codex terminal tui