ECC

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

by affaan-m · GitHub

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From the README

Install

git clone https://github.com/affaan-m/ECC.git
cd ECC
mkdir -p ~/.claude/rules/ecc

Recommended default: run the guided Claude plugin setup below once npm view ecc-universal version reports 2.2.0
Available throughout npm propagation: use the native plugin commands above
Available in release 2.2: guided package setup for Claude Code, Codex, and Kimi Code
Works: Claude Code plugin + Codex native plugin
Works: Claude Code plugin + the legacy Codex sync flow
Avoid: Claude Code plugin + full Claude manual install

Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.

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📈 Star history

2026-06-272026-08-31

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📄 About

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

ECC has 245k stars on GitHub. It has been forked 37k times. ECC is written mainly in JavaScript. It has been in active development since 2026. ECC is available under the MIT license. Its main topics are ai-agents, anthropic, claude, claude-code.

❓ Frequently asked questions

What is ECC?

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