agentmods.dev

SessionStart

A session-start hook that runs a Python validation script for the Gemini cloud command. Hooks are automated actions triggered by events such as opening a coding session.

In plain words
What is it for?
Use it in a coding-agent setup to validate the Gemini cloud command whenever a new session starts.
Why use it?
It checks the cloud-command setup at the moment a session begins, helping detect configuration or access problems early.

Hook

3 5mo ago A scan tokens not measured original MIT
View the source file matanryngler/deployshield
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/matanryngler/deployshield/session-start
Clone the repo
git clone --depth 1 https://github.com/matanryngler/deployshield
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

SessionStart 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.

hooks/hooks.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": ".*",
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"${extensionPath}/hooks/scripts/validate-cloud-command.py\" --session-start gemini"
        }
      ]
    }
  ]
}
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 ed1767624189

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository matanryngler/deployshield (3 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 2026-08-31.

Guardrailsawsclaude-codeclaude-code-plugincloud-safetykubernetes
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Vimalk0703/shipworthy · not measured

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