
Refly
The first open-source agent skills builder, defining skills by workflow rather than static prompts.

Open-source tool. Self-hosted setup.
This entry leans more educational than most awesome-lists here — pairing skill directories with tutorials and guides for people who are still learning what agent skills are and how to author their own, not just where to find pre-built ones.
Things to Know About Self-Hosted
Self-hosted tools are open-source apps you install on your own server to replace SaaS products. You get full control and often zero license cost, but you're responsible for setup, security, backups, and uptime.

The first open-source agent skills builder, defining skills by workflow rather than static prompts.

A skill pack for long- and short-form web fiction writing, covering ranking research, story breakdown, drafting, de-AI-ifying, and cover art.

Agent skills for Obsidian — teach your agent to use Obsidian CLI and open formats including Markdown, Bases, JSON Canvas.

A Claude Skill to give your agent the ability to use a web browser.

Persistent file-based planning for AI coding agents and long-running tasks.

A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows, particularly Claude Code.

Unified real-time search engine skill for AI agents, supporting general web search, vertical domain search, and parallel batch search.

Generate draw.io diagrams from natural language across 11 presets including UML, SysML/MBSE, BPMN, network, and C4.

AAS Core is the local, agent-first control plane for catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,005+ agentic skills.

AI agent skill that researches any topic across Reddit, X, YouTube, HN, Polymarket, and the web, then synthesizes a grounded summary.