Aegis icon

Aegis

Make AI coding agents architecture-aware: baseline-first, evidence-verified.

AI coding agents guess, break architecture, and say "done" with no proof. Aegis is a Method Pack (runtime-ready, not a runtime core) that makes agents work like disciplined engineers: baseline-first planning, verification-before-completion, plus TDD, systematic-debugging, and collaboration workflows. Simple tasks stay on fast-path, ceremony only when needed. One pack, every host: Codex, Claude Code, OpenCode, Kimi and other skill-aware hosts. v2.9.6 fixes Codex 0.147 frozen skill-path spellings and binds delegated work back to baseline/checkpoint instead of trusting child output. Bounded evidence: frozen A/B benchmark contract pass 61.67% → 93.33%, unsafe 13.33% → 0%. Advisory only, not completion authority.

aegis-maintainers/aegis · v2.12.1 · Development & Workflow

Aegis MaintainersOwner verifiedcaution

Trust Score

62

Security

59

Surfaces

23

v2.9.6 Live launch

Make AI coding agents architecture-aware: baseline-first, evidence-verified.

Launched
Sep 4, 2026
Pricing
free
Availability
available

What is Aegis?

Aegis is a published development & workflow plugin for AI coding agents in the codex ecosystem, developed by Aegis Maintainers and distributed through the HOL AI plugin registry. An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows.

Canonical slug
aegis-maintainers/aegis
Version
v2.12.1 · updated Oct 3, 2026

Trust & Reputation

HOL Trust Score
62

Factor Analysis

Per-metric points (0–100 each) combined via a weighted average into the overall score.

Installability
64pts
Maintenance
80pts
MCP Posture
100pts
Plugin Security
59pts
Provenance
70pts
Publisher Quality
75pts

Registry Snapshot

Publisher verification
No
Marketplace source
Unknown
Scanner
Broker fallback
Safety label
caution
Digest verified
Yes
23 bundled skills — copy or download SKILL.mdOpen skills

Trust & reputation

Trust & Reputation

HOL Trust Score
62

Factor Analysis

Per-metric points (0–100 each) combined via a weighted average into the overall score.

Installability
64pts
Maintenance
80pts
MCP Posture
100pts
Plugin Security
59pts
Provenance
70pts
Publisher Quality
75pts

Provenance

Plugin root
.
Source repo
https://github.com/GanyuanRan/Aegis
Source commit
4edf34e6441b…
Publisher verified
No
Owner verified
@GanyuanRan

Continuous scanner CI not detected

This plugin remains listed. Its overall trust score is reduced by 10% because security checks are not maintained in the source repository's CI.

Optional: maintain the scanner in the source repository's CI to receive the full trust score. Listing does not require that change.

Verified badge not detected

Add the HOL verified badge to the repository README to score +2% trust. Plugin owners can open that pull request from Guard Plugins.

Security Posture

caution
Safety label
59
Security score
0
High findings
Provider
registry-broker-fallback
Grade
F · caution
Version
Unknown
cisco-skill-scanner: unknown

Findings

mediumpublishabilitypublishability.link.missing.websiteURL

websiteURL should be present for marketplace readiness.

mediumpublishabilitypublishability.link.missing.privacyPolicyURL

privacyPolicyURL should be present for marketplace readiness.

mediumpublishabilitypublishability.link.missing.termsOfServiceURL

termsOfServiceURL should be present for marketplace readiness.

lowoperational-securitysupply-chain.lockfile-missing

Repository snapshot does not include a lockfile.

infoskill-securityskill-scan.unavailable

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Aegis — Frequently asked questions

What is Aegis?
Aegis is an AI plugin in the HOL registry. AI coding agents guess, break architecture, and say "done" with no proof. Aegis is a Method Pack (runtime-ready, not a runtime core) that makes agents work like disciplined engineers: baseline-first planning, verification-before-completion, plus TDD, systematic-debugging,…
How do I install Aegis?
Install Aegis in your harness: Codex — codex plugin marketplace add GanyuanRan/Aegis; Claude Code — /plugin marketplace add GanyuanRan/Aegis; Cursor — npx skills add GanyuanRan/Aegis. Full step-by-step guidance is on the HOL plugin page.
How do I install Aegis in Codex?
To install Aegis in Codex, start with codex plugin marketplace add GanyuanRan/Aegis. The complete step-by-step install guide for Codex is on the HOL plugin page.
How do I install Aegis in Claude Code?
To install Aegis in Claude Code, start with /plugin marketplace add GanyuanRan/Aegis. The complete step-by-step install guide for Claude Code is on the HOL plugin page.
How do I install Aegis in Cursor?
To install Aegis in Cursor, start with npx skills add GanyuanRan/Aegis. The complete step-by-step install guide for Cursor is on the HOL plugin page.
Is Aegis free?
Aegis is listed as free on HOL.
Who publishes Aegis?
Aegis is published by Aegis Maintainers and listed on HOL.
Is Aegis available now?
Aegis is currently available according to its latest public launch.

Install Guidance

Install in Claude Code

Install through the Claude Code plugin marketplace.

Claude Code plugin docs
  1. 1

    Add the marketplace

    Run this inside a Claude Code session.

    claude code
  2. 2

    Install the plugin

    Use the plugin name and the marketplace name shown by the previous command.

    claude code
  3. 3

    Scripted alternative

    Non-interactive equivalent for scripts and CI pipelines. Add --scope project to pin the install to one repository.

    shell
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Plugin Manifest

{
  "name": "aegis",
  "version": "2.12.1",
  "description": "An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows.",
  "author": {
    "name": "Aegis Maintainers",
    "url": "https://github.com/GanyuanRan/Aegis"
  },
  "homepage": "https://github.com/GanyuanRan/Aegis",
  "repository": "https://github.com/GanyuanRan/Aegis",
  "license": "MIT",
  "keywords": [
    "brainstorming",
    "first-principles",
    "subagent-driven-development",
    "skills",
    "planning",
    "tdd",
    "debugging",
    "code-review",
    "workflow"
  ],
  "skills": "./",
  "interface": {
    "displayName": "Aegis",
    "developerName": "Aegis Maintainers",
    "shortDescription": "Planning, TDD, debugging, and delivery workflows for coding agents",
    "longDescription": "Use Aegis to guide agent work through first-principles review, brainstorming, implementation planning, test-driven development, systematic debugging, parallel execution, code review, and finish-the-branch workflows.",
    "category": "Coding",
    "capabilities": [
      "Interactive",
      "Read",
      "Write"
    ],
    "defaultPrompt": [
      "I've got an idea for something I'd like to build.",
      "Let's add a feature to this project."
    ],
    "brandColor": "#F59E0B",
    "composerIcon": "./assets/aegis-small.svg",
    "logo": "./assets/app-icon.png",
    "screenshots": []
  },
  "registryIndexVersion": 5
}

Marketplace Source

Repo URL
https://github.com/GanyuanRan/Aegis
Marketplace path
Unknown
Source path
plugins/GanyuanRan/Aegis
Install policy
AVAILABLE

Skills

23 SKILL.md files ship with this plugin. Preview, copy, or download each one, then install them with the Skills CLI.

Share
skills-cli
  • anti-entropy-governance

    skills/anti-entropy-governance/SKILL.md

    Use when touching retiring old logic, collapsing duplicate owners, removing fallbacks, or schema/persistence/source-of-truth boundaries; identify opportunities automatically; destructive execution requires explicit confirmation.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • brainstorming

    skills/brainstorming/SKILL.md

    Use when defining ambiguous or high-complexity new features, product behavior, UI/component design, architecture choices, contract changes, or when grilling/pressure-testing a plan or design. Routine small requests stay on the fast path.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • communicating-concisely

    skills/communicating-concisely/SKILL.md

    Use when the user asks for caveman mode, fewer tokens, brief responses, compressed communication, or otherwise explicitly requests a much shorter answer.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • dispatching-parallel-agents

    skills/dispatching-parallel-agents/SKILL.md

    Use when facing 2+ independent tasks without a written plan, with no conflicting shared mutable state or sequential dependencies, where parallel delegation beats inline cost; otherwise inline. Planned tasks use subagent-driven-development.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • establishing-project-context

    skills/establishing-project-context/SKILL.md

    Use when the user asks to establish shared project language, or project work exposes a conflicting, renamed, or deprecated domain term that needs active semantic modeling. Routine small tasks stay on the fast path.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • executing-plans

    skills/executing-plans/SKILL.md

    Use when executing a written implementation plan across sessions or with review checkpoints. Small or single-slice plans stay inline. For same-session independent tasks, use subagent-driven-development instead.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • finishing-a-development-branch

    skills/finishing-a-development-branch/SKILL.md

    Use when verified work needs integration or cleanup of an existing task-created branch/worktree, or the user explicitly requests merge, PR, or branch lifecycle handling.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • first-principles-review

    skills/first-principles-review/SKILL.md

    Use when asked for first-principles or Occam's-razor review, or when high-risk decisions involve competing constraints, fallback growth, duplicate owners, or architecture direction risk. Ordinary bug fixes stay on the fast path.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • goal-framing

    skills/goal-framing/SKILL.md

    Use when the user explicitly sets an Aegis goal with /aegis-goal, Aegis goal:, or asks to define goal, success evidence, stop condition, or task boundaries before work.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • long-task-continuation

    skills/long-task-continuation/SKILL.md

    Use when a task is multi-step, may span context resets or sessions, uses subagents, or risks losing state before completion.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • receiving-code-review

    skills/receiving-code-review/SKILL.md

    Use when receiving code review feedback before implementing suggestions, especially when feedback is unclear, risky, disputed, or technically questionable.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • recording-architecture-decisions

    skills/recording-architecture-decisions/SKILL.md

    Use when the user asks to create, write, update, amend, supersede, or evaluate an ADR, architecture decision record, durable architecture decision, decision log, or baseline sync after architecture-changing work.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • requesting-code-review

    skills/requesting-code-review/SKILL.md

    Use when requesting independent code review, after implementation slices, before merging high-risk work, or when verification exposes evidence, baseline, architecture, compatibility, or retirement uncertainty.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • subagent-driven-development

    skills/subagent-driven-development/SKILL.md

    Use when executing a written implementation plan with independent tasks in the current session where delegation beats inline coordination cost; otherwise inline. Ad-hoc 2+ tasks without a plan use dispatching-parallel-agents.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • systematic-debugging

    skills/systematic-debugging/SKILL.md

    Use when encountering a bug, test failure, or unexpected behavior, before proposing fixes

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • test-driven-development

    skills/test-driven-development/SKILL.md

    Use when the user explicitly requests strict or test-first TDD, or when the current conversation already contains an explicit `TDD Route: strict` decision from another Aegis workflow.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • ui-ux-governance

    skills/ui-ux-governance/SKILL.md

    Use when designing, changing, or reviewing user-facing interfaces or interaction flows, including API changes that alter visible states or recovery. Backend-only work without user-facing effects stays on its existing route.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • update-aegis

    skills/update-aegis/SKILL.md

    Use when the user says `aegis:update`, asks to update or upgrade an installed Aegis method-pack, wants the latest Aegis version, or asks whether Aegis is current on this host.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • using-aegis

    skills/using-aegis/SKILL.md

    Use when starting a turn or checking Aegis skill routing.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • using-git-worktrees

    skills/using-git-worktrees/SKILL.md

    Use when a coding task needs a concurrent checkout, unrelated dirty state blocks safe branch switching, or the user or repository explicitly requires a worktree.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • verification-before-completion

    skills/verification-before-completion/SKILL.md

    Use when about to claim work is complete, fixed, passing, verified, release-ready, or ready to commit, merge, publish, or hand off.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • writing-plans

    skills/writing-plans/SKILL.md

    Use when you have an approved spec or written requirements for a multi-step task that needs a durable plan document before touching code. Small, single-owner, or fast-path tasks do not need this skill.

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

  • writing-skills

    skills/writing-skills/SKILL.md

    Use when creating new skills, editing existing skills, or verifying skills work before deployment

    SKILL.md content is not in this snapshot. Open the raw file to copy it from the source repository.

File Inventory

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AGENTS.md

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commands/brainstorm.md

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skills/systematic-debugging/find-polluter.sh

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skills/systematic-debugging/root-cause-claim-contract.md

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History, reviews, and alternatives

Latest launch

User reviews

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The first substantive review can be added on this page.

Read or write reviews

Milestones and alternatives

Makers can publish releases and security milestones after claiming the plugin.