It gives development and audit work a security-focused assistant instead of leaving security checks separate from coding work.

lagune — Plugin for Gemini CLI by wellwelwel

lagune

lagune is a plugin for Gemini CLI from wellwelwel/lagune. Its token cost is not measured, scanned A, original, Apache-2.0.

A security assistant that connects to a coding workspace through the Model Context Protocol, a standard way for an AI tool to access external services and commands.

In plain words

What is it for?: Use it while building software or performing a security audit and hardening the codebase.
Why use it?: It gives development and audit work a security-focused assistant instead of leaving security checks separate from coding work.

Written for Gemini CLI: a Gemini CLI extension manifest.

Good fit Use it while building software or performing a security audit and hardening the codebase.

Compare 6 plugins from other repositories ↓

Install with agentmods

npx agentmods add plugins/wellwelwel/lagune/gemini

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/wellwelwel/lagune

Made for: Gemini CLI.

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/plugins/wellwelwel/lagune/gemini/github.svg)](https://agentmods.dev/plugins/wellwelwel/lagune/gemini)

Your own site

<a href="https://agentmods.dev/plugins/wellwelwel/lagune/gemini"><img src="https://agentmods.dev/badge/plugins/wellwelwel/lagune/gemini/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/plugins/wellwelwel/lagune/gemini"><img src="https://agentmods.dev/badge/plugins/wellwelwel/lagune/gemini.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

lagune 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 body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

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.

scripts/plugins/gemini/gemini-extension.json · 18 lines

What it actually says

{
  "name": "lagune",
  "description": "🪼 Your security copilot as you build, your Blue Team when you audit, whether you're a developer or not.",
  "version": "0.18.0",
  "contextFileName": [],
  "mcpServers": {
    "lagune": {
      "command": "node",
      "args": [
        "lib/bin/index.js",
        "mcp",
        "${workspacePath}"
      ],
      "cwd": "${extensionPath}"
    }
  }
}

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.

yesterday Changed d652c6efab41
2d ago Changed 97f6bfa117bf
3d ago Changed · +4 lines c396b24087a9
5d ago First seen · 14 lines scan A 9a2d579401fb

Subscribe to this mod's changes

lagune is a plugin published in the GitHub repository wellwelwel/lagune (173 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-11-02.

Claude Code Security agent-skills blue-team codex cursor-ai

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