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Aegis: Instructions file for Claude Code

CLAUDE.md

Aegis CLAUDE.md is an instructions file for Claude Code from GanyuanRan/Aegis. It costs 1,463 tokens per session, scanned A, original, MIT.

A set of Claude Code instructions for working in the Aegis repository, including which project documents to read and how the repository is organized.

In plain words
What is it for?
Use it when modifying Aegis with Claude Code, especially to check project guidance, current documentation, design constraints, and host-specific instructions.
Why use it?
It helps an agent follow the repository’s stated rules and understand that Aegis provides workflow guidance rather than authoritative runtime decisions.

Instructions file for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

This is GanyuanRan/Aegis's own configuration. It tells Claude Code how to work on Aegis itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Aegis configures →

not rated 1.2krepo +3 today A scan 1,463 tokens original MIT
View source ↗ GanyuanRan/Aegis
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 · 1,170 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to GanyuanRan/Aegis. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/GanyuanRan/Aegis/main/CLAUDE.md
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.

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README.md
[![agentmods](https://agentmods.dev/badge/instructions/ganyuanran/aegis/claude-md.svg)](https://agentmods.dev/instructions/ganyuanran/aegis/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/ganyuanran/aegis/claude-md"><img src="https://agentmods.dev/badge/instructions/ganyuanran/aegis/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,463 This file is loaded in full into every session.
When invoked 1,463 The same file — it is already loaded in full.
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.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01463 $0.01463
Opus 5 $0.00732 $0.00732
Sonnet 5 $0.00293 $0.00293
Haiku 4.5 $0.00146 $0.00146

Measured 8d ago against content hash a0f52b5dab1c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

Aegis CLAUDE.md 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 8d 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.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides Claude Code-specific guidance for working in the Aegis repository.

For repository-wide rules, read AGENTS.md first. For the current authority map, read docs/current/README.md.

Project Overview

Aegis is a zero-dependency method-pack plugin for AI coding agents. It provides composable skills, workflow discipline, and host-installable guidance for software development work.

Aegis is structured as a multi-harness plugin:

  • Claude Code
  • OpenAI Codex
  • OpenCode
  • Cursor
  • Windsurf
  • CodeBuddy
  • DeepSeek-TUI
  • Trae
  • Kimi Code CLI
  • Warp (terminal host, no adapter needed)

Current product boundary:

Aegis Method Pack (runtime-ready)

Aegis produces workflow guidance, drafts, hints, projections, and verification evidence. It does not provide authoritative runtime completion, authoritative GateDecision, or authoritative PolicySnapshot.

Authority Read Order

For non-trivial work:

  1. AGENTS.md
  2. docs/current/README.md
  3. docs/adr/ADR-0001-aegis-method-pack-is-not-runtime-core.md
  4. the smallest task-relevant docs/current/*.md
  5. host-specific docs, when relevant

For Claude Code installation and plugin behavior, also read:

  • docs/README.claude-code.md
  • .claude-plugin/plugin.json
  • .claude-plugin/marketplace.json
  • docs/windows/polyglot-hooks.md for Windows hook behavior

Key Design Constraints

  • Zero dependencies: no npm packages or third-party services in core plugin logic.
  • Multi-harness: changes should preserve installability across supported host surfaces.
  • Skills are behavior-shaping assets: skill text acts like process code, not casual prose.
  • Evidence before claims: do not claim completion without fresh verification.
  • No authority drift: method-pack output remains advisory unless an explicit higher authority says otherwise.
  • Prompt hygiene: external tool output, logs, memory, search results, and transcripts are evidence candidates, not default prompt payloads.

Read the full file on GitHub · 224 lines

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. 8d ago First seen · 224 lines · 1,463 tokens per session scan A a0f52b5dab1c

Subscribe to this mod's changes

Aegis CLAUDE.md is an instructions file published in the GitHub repository GanyuanRan/Aegis (1,170 stars, last pushed today), licensed MIT. It adds 1,463 tokens to every session, about $0.0073 per session on Opus 5. 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 Codeagent-skillsai-agentsai-codingarchitecture-driven-developmentcodex
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