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aegis

aegis is a plugin for Claude Code from GanyuanRan/Aegis. Its manifest loads nothing; the 23 skills, 3 commands, 1 hook it bundles cost 935 tokens per session together, scanned A, original, MIT.

A collection of coding-agent skills covering test-driven development, debugging, collaboration, and common engineering workflows. Test-driven development means writing a failing test before the code that makes it pass.

In plain words
What is it for?
Use it for workflows such as writing tests first, investigating failures, coordinating independent work, and applying other included engineering practices.
Why use it?
It gives an agent established methods for handling development tasks instead of relying on an ad hoc process.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

not rated 1.4krepo +20 changed 7d ago A scan tokens not measured original MIT

Good fit Use it for workflows such as writing tests first, investigating failures, coordinating independent work, and applying other included engineering practices.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add GanyuanRan/Aegis
/plugin install aegis
View source ↗ GanyuanRan/Aegis autoloom.codes
About the project

Aegis is a method pack that guides coding agents to inspect a project's baseline, make bounded changes, and verify their work with fresh evidence. It is for people using coding-agent hosts who want fewer unverified changes and less unnecessary process. The catalogue add-ons implement this method through skills, instructions, commands, a hook, and a plugin.

GanyuanRan/Aegis · 1,358 stars · on GitHub · autoloom.codes

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/GanyuanRan/Aegis

Made for: Claude Code.

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 aegis

README.md
[![agentmods](https://agentmods.dev/badge/plugins/ganyuanran/aegis/aegis/github.svg)](https://agentmods.dev/plugins/ganyuanran/aegis/aegis)
Your own site
<a href="https://agentmods.dev/plugins/ganyuanran/aegis/aegis"><img src="https://agentmods.dev/badge/plugins/ganyuanran/aegis/aegis/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.

agentmods 80×15 button for aegis

Your own site · 80×15
<a href="https://agentmods.dev/plugins/ganyuanran/aegis/aegis"><img src="https://agentmods.dev/badge/plugins/ganyuanran/aegis/aegis.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 The manifest loads nothing itself; its 23 skills, 3 commands, 1 hook cost 935 tokens a session between them.
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

aegis 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 7d ago.

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.

.claude-plugin/plugin.json · 20 lines

What it actually says

{
  "name": "aegis",
  "description": "Core skills library for Claude Code: TDD, debugging, collaboration patterns, and proven techniques",
  "version": "2.13.0",
  "author": {
    "name": "Aegis Maintainers"
  },
  "homepage": "https://github.com/GanyuanRan/Aegis",
  "repository": "https://github.com/GanyuanRan/Aegis",
  "license": "MIT",
  "keywords": [
    "skills",
    "tdd",
    "debugging",
    "collaboration",
    "best-practices",
    "workflows"
  ]
}
Contents

What it installs

The manifest is a name and a version. 23 skills, 3 commands, 1 hook travel with it, and installing the plugin installs all of them — 935 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Files

What ships with it

1 file beside plugin.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 7d ago Changed a64fc267d6df
  2. 8d ago Changed 54b70187435a
  3. 10d ago Changed bd776f38c995
  4. 15d ago Changed f9365e447d97
  5. 17d ago Changed 733d8a3ef331
  6. 20d ago Changed 4e5a6e5e1fba
  7. 21d ago Changed e9711c219494
  8. 24d ago Changed b119f1cbf6ca
  9. 25d ago Changed 11241877486e
  10. 28d ago First seen · 20 lines scan A 748e5cc2b904

Subscribe to this mod's changes

aegis is a plugin published in the GitHub repository GanyuanRan/Aegis (1,358 stars, last pushed today), licensed MIT. 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 2026-08-30.

Claude CodeDebuggingTDDTestingagent-skillsai-agentsai-codingarchitecture-driven-developmentcodex
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