everything-claude-code-agent-harness

Skill by ara.so — MCP Skills collection.

Everything Claude Code (ECC) is a complete performance optimization system for AI agent harnesses including Claude Code, Cursor, Codex, OpenCode, and others. It provides production-ready agents, skills, hooks, rules, MCP configurations, and legacy command shims evolved over 10+ months of intensive use building real products.

What ECC Does

ECC is not just configs — it's a full system:

• Skills — 230+ reusable domain skills (TypeScript, Python, Go, Java, Kotlin, Rust, C++, etc.)
• Agents — 60+ specialized agents with role-based expertise
• Instincts — Core behavioral rules and patterns
• Memory — Session persistence and context optimization
• Security — AgentShield for prompt injection defense, sandbox controls
• Hooks — Lifecycle hooks for session start/stop/commit
• Token Optimization — Model routing, prompt slimming, background processes
• Continuous Learning — Auto-extract patterns from sessions into new skills
• Cross-Harness — Works across Claude Code, Cursor, Codex, OpenCode, Gemini Code Assist