ECC
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
- 286.9k stars
- 42.5k forks
- 263 open issues
- Language: JavaScript
- License: MIT
- updated
Install
git clone https://github.com/affaan-m/ECC && cp ECC/*.md ~/.claude/agents/- Clone the repository and copy the agent .md definitions into ~/.claude/agents (or .claude/agents inside a project).
- Start a new Claude Code session to load the agents.
- Delegate work to them with the Task/Agent tool or by name.
Editor's note
ECC is an operator system for AI coding agents that provides a structured collection of skills, instincts, memory configurations, security hooks, MCP setups, and legacy command shims built over ten months of production use. It integrates natively with Claude Code alongside Codex, Cursor, OpenCode, Gemini, Zed, and GitHub Copilot through a cross-harness architecture, meaning the same agent configuration layer travels across tools without rewriting. The v2.0.0 release introduces the Hermes operator story, a named persona layer on top of the reusable core, documented via a dedicated setup guide and cross-harness architecture reference. Two npm packages, ecc-universal and ecc-agentshield, deliver token optimization, memory persistence, background process management, and security scanning including attack-vector mitigation and CVE handling. A GitHub App with a free tier handles pull-request audits, while ECC Pro at nineteen dollars per seat per month covers private repositories. Developers building with Claude Code who want a pre-configured, security-aware agent harness rather than assembling one from scratch are the primary audience.
24 items in this repository
Workflow command scaffold for add-language-rules in everything-claude-code.
Structured self-debugging workflow for AI agent failures using capture, diagnosis, contained recovery, and introspection reports. Use when an agent run fails and you need a reproducible diagnosis instead of a retry.
Build an evidence-backed ECC install plan for a specific repo by sorting skills, commands, rules, hooks, and extras into DAILY vs LIBRARY buckets using parallel repo-aware review passes. Use when ECC should be trimmed to what a project actually needs instead of loading the full bundle.
Write articles, guides, blog posts, tutorials, newsletter issues, and other long-form content in a distinctive voice derived from supplied examples or brand guidance. Use when the user wants polished written content longer than a paragraph, especially when voice consistency, structure, and credibility matter.
Patterns and architectures for autonomous Claude Code loops — from simple sequential pipelines to RFC-driven multi-agent DAG systems.
Build a source-derived writing style profile from real posts, essays, launch notes, docs, or site copy, then reuse that profile across content, outreach, and social workflows. Use when the user wants voice consistency without generic AI writing tropes.
Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
Create platform-native content systems for X, LinkedIn, TikTok, YouTube, newsletters, and repurposed multi-platform campaigns. Use when the user wants social posts, threads, scripts, content calendars, or one source asset adapted cleanly across platforms.
Cache expensive file processing results using SHA-256 content hashes — path-independent, auto-invalidating, with service layer separation.
C++ coding standards based on the C++ Core Guidelines (isocpp.github.io). Use when writing, reviewing, or refactoring C++ code to enforce modern, safe, and idiomatic practices.
Use only when writing/updating/fixing C++ tests, configuring GoogleTest/CTest, diagnosing failing or flaky tests, or adding coverage/sanitizers.
Multi-platform content distribution across X, LinkedIn, Threads, and Bluesky. Adapts content per platform using content-engine patterns. Never posts identical content cross-platform. Use when the user wants to distribute content across social platforms.
Workflow command scaffold for database-migration in everything-claude-code.
Multi-source deep research using firecrawl and exa MCPs. Searches the web, synthesizes findings, and delivers cited reports with source attribution. Use when the user wants thorough research on any topic with evidence and citations.
Subagents overview
Language: English | العربية | Português (Brasil) | 简体中文 | 繁體中文 | 日本語 | 한국어 | Türkçe | Русский | Tiếng Việt | ไทย | Deutsch | Español | Українська | Polski | বাংলা
Warning
Official sources only. Install ECC only from verified channels: the GitHub repository github.com/affaan-m/ECC, the npm packages
ecc-universalandecc-agentshield, the GitHub App, the plugin slugecc@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
Use the guided setup or native plugin commands. Both install the same ecc@ecc plugin. Choose one and do not stack a full manual Claude install on top.
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
Past sponsors: Atlas Cloud · Mike Morgan (inactive)
Community sponsors: @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 -> improveInstead 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 native Codex and Qoder plugin paths, 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 71 agents, 311 skills, and 97 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 | 71 agents | Planning, review, build repair, security, architecture, and domain work |
| Skills | 311 skills | TDD, research, security, docs, frontend, data, ML, operations, and more |
What people ask about ECC
What is affaan-m/ECC?
affaan-m/ECC is subagents for the Claude AI ecosystem. The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. It has 286.9k GitHub stars and its last recorded update is dated 2026-10-20.
How do I install ECC?
You can install ECC by cloning the repository (https://github.com/affaan-m/ECC) or following the README instructions on GitHub. ClaudeWave also provides quick install blocks on this page.
Is affaan-m/ECC safe to use?
Our security agent has analyzed affaan-m/ECC and assigned a Trust Score of 100/100 (tier: Verified). See the full breakdown of passed checks and flags on this page.
Who maintains affaan-m/ECC?
affaan-m/ECC is maintained by affaan-m. The last recorded GitHub activity is dated 2026-10-20, with 263 open issues.
Are there alternatives to ECC?
Yes. On ClaudeWave you can browse similar subagents at /categories/agents, sorted by popularity or recent activity.
Maintain this repo? Show its Trust Score in your README
The badge shows this repository's current Trust Score and verdict, and links back to this page. It follows the catalogue data: nobody can buy or edit the score it displays.
[](https://claudewave.com/en/repo/affaan-m-ecc)<a href="https://claudewave.com/en/repo/affaan-m-ecc"><img src="https://claudewave.com/api/badge/affaan-m-ecc" alt="ClaudeWave Trust Score for affaan-m/ECC" width="320" height="64"></a>