AI Standards

Open-source AI coding skills for Claude Code, Codex, Gemini CLI, OpenCode, Mastra Code, Cursor, Copilot, and any agent that reads Agent Skills

Skills for TypeScript, React, React Native, local-first apps, offline sync, and modern web development.

Quick Install

Any agent

The skills CLI installs into Codex, OpenCode, Gemini CLI, Cursor, Copilot, Claude Code, and 70+ other agents. It detects which agents you have installed and asks which skills to add.

# Pick skills interactively
npx skills add guillempuche/ai-standards

# One skill, into specific agents
npx skills add guillempuche/ai-standards --skill powersync -a codex -a opencode

Codex CLI

codex plugin marketplace add guillempuche/ai-standards

# Full bundle (all skills), or any single skill
codex plugin add ai-standards@ai-standards
codex plugin add powersync@ai-standards

Codex lists the skills from .agents/plugins/marketplace.json. The agents in agents/ are Claude Code-only, so Codex doesn't list them.

Claude Code

# Full bundle (all skills + agents)
/plugin marketplace add guillempuche/ai-standards

# Or install individually
/plugin marketplace add guillempuche/ai-skill-powersync
/plugin marketplace add guillempuche/ai-skill-effect-lookup
/plugin marketplace add guillempuche/ai-skill-unikraft
/plugin marketplace add guillempuche/ai-skill-tamagui
/plugin marketplace add guillempuche/ai-skill-test-bdd
/plugin marketplace add guillempuche/ai-skill-commit
/plugin marketplace add guillempuche/ai-skill-pr
/plugin marketplace add guillempuche/ai-skill-issue
/plugin marketplace add guillempuche/ai-agent-readability-improver
/plugin marketplace add guillempuche/ai-agent-a11y-accessibility-reviewer

Antigravity CLI

Antigravity CLI replaced Gemini CLI for unpaid and Google One users in June 2026.

agy plugin install https://github.com/guillempuche/ai-skill-powersync

Install skills from their own repos rather than the bundle: the bundle also ships agents/, whose Claude Code format Antigravity may not load.

Gemini CLI

gemini skills install https://github.com/guillempuche/ai-standards.git --path skills/powersync

Gemini CLI is still available on paid tiers.

Manual

Copy a folder from skills/ into the directory your agent reads, see Compatibility. .agents/skills/ covers most agents; Claude Code needs .claude/skills/.

Skills Catalog

powersync

Build local-first, offline-capable apps with real-time sync


Platforms	Web, React Native, Node.js, Capacitor, Electron
Frameworks	React, Vue, Angular
ORMs	Kysely, Drizzle, TanStack DB
Backends	Postgres, MongoDB, MySQL, SQL Server, Supabase

View skill | PowerSync docs

effect-lookup

Quick lookup for Effect TypeScript library APIs and patterns


Coverage	Core Effect, Platform, CLI, RPC, SQL, AI packages
Features	Module reference, common patterns, source code lookup
Includes	Optional MCP server integration for indexed docs

View skill | Effect docs

unikraft

Kraft CLI for building and deploying Unikraft unikernels


Commands	Build, deploy, manage instances, volumes, services
Platform	Unikraft Cloud (KraftCloud)
Features	Rolling updates, scale-to-zero, compose support

View skill | Unikraft docs

tamagui

Universal React + React Native UI with optimizing compiler


Platforms	Web, React Native, iOS, Android
Frameworks	Next.js, Expo, Vite, Metro
Features	Design tokens, themes, 50+ accessible components
Compiler	Build-time style extraction for performance

View skill | Tamagui docs

test-bdd

Generate BDD-style tests that document behavior and test public API only


Style	GIVEN / WHEN / THEN / AND comments (flexible combinations)
Tooling	Vitest + testing-library (TypeScript-first, framework-agnostic principles)
Covers	Components, hooks, utilities, constants
Focus	Observable behavior over implementation details

View skill

commit

Write and validate commit messages in a Conventional-Commits house style


Format	`type(scope): subject`, past-tense body bullets, issue-closing trailers
Portable	Scopes, extra types, and the formatter come from the repo, not the skill
Focus	Intent over mechanism; plain language a non-technical reader can follow

View skill

pr

Take a finished branch through verification, self-review, and merge


Covers	Re-baseline, end-to-end verification, self-review, gates, body, merge
Portable	Gates, CI shape, worktrees, and companion skills are read from the repo
Requires	git; the pull-request steps assume GitHub and the `gh` CLI

View skill

issue

Turn a rough ask into a well-formed GitHub issue


Covers	Interview, duplicate check, type-aware draft (bug/feature/task), labels
Portable	Labels, areas, and attribution are read from the repo, not the skill
Requires	git; assumes GitHub and the `gh` CLI

View skill

Agents Catalog

readability-improver

Improve code readability through renaming, comments, and whitespace


Focus	Selective improvements - skips self-documenting code
Actions	Rename variables, add whitespace, document "why" not "what"
Safety	Never changes functionality, updates all imports

View agent

a11y-accessibility-reviewer

Review and fix accessibility issues (WCAG, VoiceOver, TalkBack)


Platforms	React, React Native, Web
Standards	WCAG 2.1/2.2, WAI-ARIA, iOS/Android a11y APIs
Coverage	Visual, motor, auditory, cognitive, vestibular, seizure

View agent

Compatibility

Skills follow the Agent Skills specification, so the same SKILL.md folders work in every agent below.

Agent	Project skills	User skills
Claude Code	`.claude/skills/`	`~/.claude/skills/`, or install as a plugin
Codex	`.agents/skills/`	`~/.agents/skills/`, or install as a plugin
Gemini CLI	`.agents/skills/`, `.gemini/skills/`	`~/.agents/skills/`, `~/.gemini/skills/`
OpenCode	`.agents/skills/`, `.opencode/skills/`, `.claude/skills/`	`~/.agents/skills/`, `~/.config/opencode/skills/`, `~/.claude/skills/`
Mastra Code	`.mastracode/skills/`, `.claude/skills/`, `.agents/skills/`	`~/.mastracode/skills/`, `~/.claude/skills/`, `~/.agents/skills/`
Antigravity	`.agents/skills/`	`~/.gemini/antigravity-cli/skills/` (CLI), `~/.gemini/config/skills/` (app and IDE), or install as a plugin
Cursor, GitHub Copilot, and others	see the `skills` CLI agent table

allowed-tools is experimental in the spec: Claude Code uses it to pre-approve the listed tools for the turn, and support in other agents varies (the skills CLI table marks Kiro CLI and Zencoder as not supporting it).

Agents in agents/ use the Claude Code subagent format and only load in Claude Code. Other tools define subagents differently (Codex, for example, uses TOML files), so copy the prompt body if you want one elsewhere.

Creating Skills

Create folder under skills/ with lowercase hyphenated name
Add SKILL.md with YAML frontmatter:

---
name: your-skill
description: What it does and when to use it (max 1024 chars)
license: MIT
metadata:
  author: your-name
  version: 1.0.0
---

# Your Skill

Instructions here...

Add references/ folder for detailed docs (keeps SKILL.md under 500 lines)

See AGENTS.md for full guidelines.

Naming Conventions

Plugin names and GitHub repo slugs follow different conventions on purpose:

Surface	Convention	Example
Marketplace plugin name (`/plugin` UI, `/plugin install`)	topic only, kebab-case	`powersync`, `test-bdd`, `readability-improver`
GitHub repo slug (`/plugin marketplace add guillempuche/…`)	`ai-{skill\|agent}-{topic}`	`guillempuche/ai-skill-powersync`, `guillempuche/ai-agent-readability-improver`
Mixed-type escape hatch (repo bundles both skills and agents)	`ai-plugin-{topic}`	`guillempuche/ai-plugin-toolbox`

Why the split: repo slugs are user-typed during marketplace add (one-time, and guillempuche/powersync would look like a library fork). Plugin names live inside the /plugin UI where users already know they're browsing Claude plugins, so a prefix would be noise.

Install command shape combines both:

/plugin install powersync@guillempuche-ai-skill-powersync
#              └─plugin──┘ └────── marketplace ──────┘

Repository Structure

ai-standards/
├── .claude-plugin/
│   └── plugin.json          # Claude Code plugin manifest
├── skills/
│   └── <skill-name>/
│       ├── SKILL.md         # Main skill file
│       └── references/      # Detailed documentation
├── agents/
│   └── <agent-name>.md      # Agent with YAML frontmatter
├── templates/
│   ├── skills/              # Extra files for skill repos (REQUIREMENTS.md)
│   └── agents/              # Extra files for agent repos
├── scripts/
│   ├── generate-individual-repos.sh  # Generate dist-repos/
│   └── create-github-repos.sh        # Push to GitHub
├── AGENTS.md                # AI agent instructions
└── README.md

Individual Repos

Skills and agents are also published as individual repos for standalone installation:

# Add the marketplace (one-time, uses repo slug)
/plugin marketplace add guillempuche/ai-skill-powersync
/plugin marketplace add guillempuche/ai-agent-readability-improver

# Install the plugin (plugin name is topic-only, marketplace suffix is repo-slug form)
/plugin install powersync@guillempuche-ai-skill-powersync
/plugin install readability-improver@guillempuche-ai-agent-readability-improver

Generate individual repos with:

./scripts/generate-individual-repos.sh  # Creates dist-repos/
./scripts/create-github-repos.sh        # Pushes to GitHub

Standards

Agent Skills - Portable skill format for AI coding agents
AGENTS.md - Instructions for AI agents working on repositories

Contributing

Fork this repository
Create your skill under skills/ following the structure above
Validate: folder name matches name field, description under 1024 chars
Submit PR with title: [skill-name] Brief description

License

MIT