Superpowershttps://github.com/obra/superpowersAgentic skill framework + skills library. Everything Claude Code (ECC)https://github.com/WorldFlowAI/everything-claude-codeEverything-for-Claude-Code collection — agents, skills, commands. ClawHubhttps://clawhub.comSkills marketplace for agent runtimes. Agent-Native skillshttps://github.com/BuilderIO/agent-native/tree/main/.agents/skills~80 SKILL.md engineering skills — actions, A2A, sharing, automations, reliable-mutations — same format T3rnel/Claude agents read.