What This Is
ECC is an open source agent harness by Affaan Mustafa. It is not a prompt pack and it is not a course. It registers as a plugin marketplace inside Claude Code, and it brings a set of specialist agents, reusable skills and commands with it.
It runs inside a tool you already use. Claude Code, Codex, Opencode and Cursor are all named by the project itself.
Where the video and the repo disagree, both are shown.
The Facts, and Where Each One Comes From
Repository: github.com/affaan-m/ECC
238,312 stars and 36,195 forks, read from the GitHub API on 6 August 2026. The video says "over 230,000", which was right when it was recorded and is now low.
Licence:MIT. Free to use, free to fork, free to keep.
Created 18 January 2026. Last pushed 6 August 2026, the same day this was written, so it is actively maintained rather than abandoned at launch.
67 agents, 281 skills, 94 commands, and 6 MCP servers (7 with the Supabase sync option), from the README.
Requires Claude Code CLI v2.1.0 or later, stated in the README.
Free, for your email
Get the full setup steps + the copy-paste setup prompt
The rest of this guide (10 more sections, 4 copy-paste prompts) opens right here. The setup prompt, one paste into Claude that sets it all up, comes by email only. Use your real address.
Unlocks: Installing It · If you want it in Codex as well · If you would rather install from a clone · The Part the Video Does Not Have Room For · A marketplace is not a clone, and the difference is updates · +5 more
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