The ECC repository is an agent harness performance optimization system designed to enhance AI coding assistants across multiple platforms. Written primarily in JavaScript, it provides a comprehensive framework for managing skills, instincts, memory optimization, security, and research-driven development for Claude Code, Codex, Cursor, OpenCode, and other AI agent harnesses. The project maintains a homepage at ecc.tools and is classified across multiple domains including Claude, Anthropic, LLM, AI, Code, Snippets, Examples, Utilities, Development, and API.
The repository has demonstrated significant growth and active maintenance.
ECC functions as a complete production-ready system rather than merely a configuration tool. It encompasses skills, instincts, memory optimization, continuous learning capabilities, security scanning, and research-first development practices evolved over ten months of intensive daily use in real-world multi-harness engineering workflows. The system supports cross-harness agent workflows and operates across Codex, Claude Code, Cursor, OpenCode, Gemini, Zed, GitHub Copilot, and other AI agent harnesses.
Version 2.0.0, released in June 2026, represents a stable graduation of the 2.0 line and introduces the agent harness operating system concept. This version includes 261 skills, a control-pane substrate with session adapters and MCP inventory, a worktree-lifecycle service, the orchestrator family, and launched the ECC Discord community. The v2.0.0-rc.1 release in April 2026 added a Tkinter-based dashboard GUI with dark and light theme options, synchronized public surfaces matching the actual OSS surface with 66 agents and 268 skills, expanded operator and outbound workflows, media and launch tooling, and an alpha Rust control-plane prototype in the ecc2 directory.
The project offers both open-source and commercial options. The MIT-licensed repository remains free, while ECC Pro provides a hosted GitHub App for private repositories at nineteen dollars per seat per month. The project is funded through GitHub sponsorships starting at five dollars monthly and Pro subscriptions, allowing a single maintainer to ship weekly updates across seven harnesses. Business sponsors include CodeRabbit, Greptile, and Atlas Cloud, with community sponsors contributing at various levels. The repository emphasizes security and official distribution channels, warning users to install only from verified sources including the GitHub repository, npm packages ecc-universal and ecc-agentshield, the GitHub App, and ecc.tools.
