System-wide skill registry for AI agents.
Forge, manage, and compose agent capabilities from the terminal.

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Skern is a minimal, agent-first CLI for managing Agent Skills across Claude Code, Codex CLI, and OpenCode. One SKILL.md per skill — portable, validated, and instantly installable to any supported platform.

Quick Example

skern init
skern skill create code-review --description "Review PRs for style and correctness"
skern skill install code-review --platform all

Features

• Unified skill lifecycle — create, validate, search, install, and remove across platforms
• Agent Skills spec — reads and writes SKILL.md directly, no proprietary format
• Cross-platform — install to Claude Code, Codex CLI, or OpenCode in one command
• Tool-forming loop — agents scaffold and reuse skills automatically
• Overlap detection — fuzzy matching prevents duplication
• JSON output — every command supports --json for agent-operable workflows

Install

curl -fsSL https://raw.githubusercontent.com/devrimcavusoglu/skern/main/scripts/install.sh | bash

Or with Go 1.23+:

go install github.com/devrimcavusoglu/skern/cmd/skern@latest

Documentation

Full documentation is available at skern.dev:

• Getting Started — why skern, design principles
• Installation — all installation methods
• Quick Start — first workflow walkthrough
• CLI Reference — full command reference
• Architecture — how the layers fit together
• Platforms — platform-specific details
• Contributing — development setup and testing

License

Apache 2.0 — see LICENSE for details.