agentmods.dev

Stop

An automatic check that runs Python when the coding agent finishes responding.

In plain words
What is it for?
Use it for end-of-response checks defined in a Python validation script.
Why use it?
It can run a final validation step after the agent's work, helping detect problems before the response is complete.

Hook

4 4d ago A scan tokens not measured original MIT
View the source file This-HW/claude-code-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/this-hw/claude-code-kit/stop
Clone the repo
git clone --depth 1 https://github.com/This-HW/claude-code-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 original No closer match found in the catalogue.
Security

Grade A, and why

Stop 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.

plugins/common/hooks/hooks.json · 16 lines

What it actually says

{
  "Stop": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3",
          "args": [
            "${CLAUDE_PLUGIN_ROOT}/hooks/stop-validator.py"
          ],
          "timeout": 120
        }
      ]
    }
  ]
}
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 · 16 lines scan A cee87c62b608

Subscribe to this mod's changes

Stop is a hook published in the GitHub repository This-HW/claude-code-kit (4 stars, last pushed 4d 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.

Languagesai-agentsanthropicclaude-codeclaude-code-pluginclaude-pluginsdeveloper-tools
Related

Other hooks, from other repositories

Stop

Runs when the agent finishes a response, executing post_run_metrics.py via python3. From richfrem/agent-plugins-skills.

richfrem/agent-plugins-skills · not measured

PostToolUse

Runs after a tool call finishes for Edit, Write and MultiEdit tool calls, executing check-line-length.ts with --extensions and --suppressions. From CitiesSkylinesModding/agents-plugins.

CitiesSkylinesModding/agents-plugins · not measured

PreToolUse

Runs before the agent uses a tool for Write, Edit, WebFetch, WebSearch and Bash tool calls, executing validate-token-limits.py, leakage-guard.py, webfetch-guard.py and enforce-issue-limits.py (4 commands). From dryvist/claude-code-plugins.

dryvist/claude-code-plugins · not measured

PreToolUse

Runs before the agent uses a tool for Bash(git push*) tool calls, executing check-plugin-versions.sh. From acostanzo/quickstop.

acostanzo/quickstop · not measured

Stop

Runs when the agent finishes a response, executing lint.sh via sh. From pehcastro/harness.

pehcastro/harness · 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