ECC
Agent Frameworks Open source (MIT)
GitHub stars284.7k
Forks42.3k
LicenseMIT
Last activityOct 20, 2026
Open issues249
Repository: affaan-m/ECC ยท Data checked Oct 2026
About
ECC is an agent harness operating system: portable skills, instincts, memory, security rules, and research-first workflows that work across Claude Code, Codex, OpenCode, and Cursor. Instead of rebuilding your agent setup for every tool, you define it once in ECC and carry it with you. It is MIT open source and one of the fastest-growing agent repos, which makes it a natural starting layer for anyone serious about agent workflows.
Details
Open source. You run it yourself.
Auth: Open source (MIT)
Rate limit: Self-hosted open source: no platform limits.
Verified: 2026-10-12
Best for: developer automation
Setup
- Install ECC from the repo README.
- Run ecc init in your project.
- Add skills for the workflows you repeat.
- Connect it to your harness of choice (Claude Code, Codex, OpenCode, Cursor).
- Carry the same setup across machines and harnesses.
Example
ecc init && ecc skill add web-researchUse cases
- Keep one agent skill set across Claude Code, Codex, and Cursor
- Enforce security rules on every agent run
- Build a personal library of reusable agent workflows