affaan-m/ECC

free · open source

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

Free open source

★ 240,447 stars

the complete repository, straight from GitHub: no payment, no account, the same clone anyone gets

View on GitHub

Start from this repo, in your terminal:

git clone https://github.com/affaan-m/ECC.git ECC
cd ECC
claude "Read the README, then adapt this repo to what I am building."

Agents: GET this URL with Accept: application/json for the machine face (facts, topics, README excerpt). Nothing is purchasable on this page; paid listings answer at /search.

LanguageJavaScript

Forks36,519

Pushed1mo ago

Releases15

Kindapp

LicenseMIT

Categorydev_tool

Homepageecc.tools

This page indexes a public GitHub repo. It is not affiliated with affaan-m and nothing here is for sale.

This is my repo: claim or remove it

One GitHub sign-in proves ownership; you can then keep the page, edit it, or remove it for good.

Want a maintained, agent-ready version of this repo, with support and current dependencies?

More from this owner: affaan-m’s page.

README

the first part; the full file is in the repo

[!WARNING] Official sources only. Install ECC only from verified channels: the GitHub repository github.com/affaan-m/ECC, the npm packages ecc-universal and ecc-agentshield, the GitHub App, the plugin slug ecc@ecc, and the project website ecc.tools. Third-party re-uploads and unofficial mirrors are not maintained or reviewed by the project and may contain malware.

Install with Claude Code

Run these commands inside Claude Code:

/plugin marketplace add https://github.com/affaan-m/ECC
/plugin install ecc@ecc

That installs ECC's skills, agents, commands, and plugin-managed hooks. If you choose this path, stop there. Do not also run a full manual install into Claude Code.

Guided package setup is coming in ecc-universal 2.2.0. Use the native Claude plugin commands above while npm remains on 2.1.0.

ECC Pro + GitHub App
Install free · Private repos from $19/seat/mo

Sponsor ECC
Fund the open-source project

Community
Discord · Q&A · Show and Tell

OSS stays free. This repo is MIT-licensed forever. ECC Pro is the hosted GitHub App for private repos. Sponsors and Pro subscribers fund the work. That's why a single maintainer ships weekly across 7 harnesses.

Partners & sponsors

Community sponsors: Mike Morgan · @jasonwu513 · @1anter · @massimotodaro · @meadmccabe Become a Sponsor · Sponsor Tiers · Sponsorship Program

Jump to install ↓

ECC

Your agent can write code, but ECC gives it a coordinated engineering system and toolbox: it plans before it builds, verifies changes with tests, reviews its own work from a fresh context, remembers what matters, and turns repeated wins into reusable skills and workflows.

plan -> test -> implement -> review -> verify -> remember -> improve

Instead of rebuilding that process in every prompt, you install it once and make it part of how your agent works.

Optimize the context window. Persist everything else.

ECC is MIT-licensed open source. It works best with Claude Code today, has a supported Codex sync path, and provides capability-limited adapters for Cursor, OpenCode, Gemini, Zed, GitHub Copilot, Antigravity, Qwen, and other harnesses. See the support status matrix before assuming feature parity.

Access to 68 agents, 285 skills, and 94 legacy command shims, plus hooks, rules, memory, continuous learning, and AgentShield security scanning. The agents are specialized for planning, review, build repair, security, architecture, and domain work.

Included	Count	What it gives you
Agents	68 agents	Planning, review, build repair, security, architecture, and domain work
Skills	285 skills	TDD, research, security, docs, frontend, data, ML, operations, and more
Commands	94 commands	Convenient entry points while ECC moves to a skills-first surface
Hooks and memory	Runtime	Enforce