ECC

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

ECC is an open-source coding & software engineering AI agent maintained by affaan-m. It ranks #3 on The Agentic Leaderboard with an overall score of 87.1 / 100, scoring 100% on reliability and 71.2% on tool selection quality. The project has 289,124 GitHub stars.

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