megalinter

megalinter is a plugin for Gemini CLI from oxsecurity/megalinter. Its token cost is not measured, scanned A, original, AGPL-3.0.

A setup and run tool for MegaLinter, which checks source code and configuration with many language and format linters. It can be used locally or from continuous integration, the automated checks that run during code changes.

In plain words
What is it for?
Use it to add MegaLinter to a repository, run its checks, and fix reported issues across supported languages and file formats.
Why use it?
It gives a repository one way to run and fix many style and correctness checks instead of configuring each linter separately.

Plugin for Gemini CLI

Written for Gemini CLI: a Gemini CLI extension manifest.

Good fit Use it to add MegaLinter to a repository, run its checks, and fix reported issues across supported languages and file formats.

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Install with agentmods
npx agentmods add plugins/oxsecurity/megalinter/gemini-extension
About the project

MegaLinter is a repository analysis tool that runs linters and related checks across source code, infrastructure-as-code, configuration, scripts, formats, spelling, copy-pastes, and security issues. It is for teams that want automated quality checks in GitHub Actions, other CI systems, or local development. The catalogue add-ons help coding agents use and configure MegaLinter and respond to its findings.

oxsecurity/megalinter · 2,578 stars · on GitHub · megalinter.io

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/oxsecurity/megalinter

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.

agentmods badge for megalinter

README.md
[![agentmods](https://agentmods.dev/badge/plugins/oxsecurity/megalinter/gemini-extension.svg)](https://agentmods.dev/plugins/oxsecurity/megalinter/gemini-extension)
Your own site
<a href="https://agentmods.dev/plugins/oxsecurity/megalinter/gemini-extension"><img src="https://agentmods.dev/badge/plugins/oxsecurity/megalinter/gemini-extension.svg" alt="Measured on agentmods" 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 unknown No closer match found in the catalogue.
Security

Grade A, and why

megalinter 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.

gemini-extension.json · 6 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 · 6 lines scan A a9c7ea383e9c

Subscribe to this mod's changes

megalinter is a plugin published in the GitHub repository oxsecurity/megalinter (2,578 stars, last pushed today), licensed AGPL-3.0. 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 2026-09-06.