ECC, a 297k-star harness packing 71 agents and 314 skills for Claude Code and beyond
victor_explore · x · 2026-11-05
What ECC is
The open-source ECC (Everything Claude Code) project by affaan-m is an "agent harness performance optimization system" that solves the pain of rebuilding plan/test/review setups from scratch in every new Claude Code project — install once, and the whole engineering workflow becomes part of how your agent works.
What's included
- 71 specialized agents: planning, review, build repair, security, architecture, and domain work
- 314 skills: TDD, research, security, docs, frontend, data, ML, operations, and more
- 98 command shims: convenient entry points while ECC moves to a skills-first surface
- Hooks and memory: runtime enforcement, session summaries, continuous learning, instincts, and context controls
- AgentShield: security scanning
Core workflow
plan → test → implement → review → verify → remember → improve, guided by the principle "optimize the context window, persist everything else" — agents plan before building, verify with tests, review their own work from fresh context, and turn repeated wins into reusable skills.
Compatibility
MIT-licensed. Works best with Claude Code today, has native Codex and Qoder plugin paths, plus capability-limited adapters for Cursor, OpenCode, Gemini, Zed, GitHub Copilot, Antigravity, Qwen, and other harnesses (the README warns to check the support status matrix before assuming feature parity).
The repo has reached roughly 297k stars and 44k forks, making it one of the most-starred AI coding tooling projects on GitHub.
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