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Free guide · Claude & Claude Code

ECC Setup Guide: The 240k-star Claude Code repo, installed properly

The biggest Claude Code repo on GitHub gives you 284 skills, 68 agents and 94 slash commands for free. Here is the two-command install, the rule pack to start with, and the switch-on discipline that stops it slowing Claude down.

Charlie Hills Added 6 August 2026 · Free

What’s inside

  1. 1What it is
  2. 21. Install it (two commands)
  3. 32. Add one rule pack, not all of them
  4. 43. The switch-on discipline
  5. 54. Worth knowing
🧰 Everything is free. Switching everything on is the mistake.
ECC is an open-source repo for Claude Code with 284 skills, 68 agents and 94 slash commands. It installs in two commands. The trap is treating it as an all-you-can-eat install, because every extra skill, agent and MCP server is more for Claude to hold in its head before it does your actual work.

What it is

github.com/affaan-m/ECC, MIT licensed, free. Verified on 14/08/2026:

  • 240,089 stars, 36,438 forks
  • 68 agents for planning, review, build repair, security, architecture and domain work
  • 284 skills covering TDD, research, security, docs, frontend, data, ML and operations
  • 94 slash commands as entry points while the project moves to a skills-first setup
  • Rule packs, hooks, memory and AgentShield security scanning on top
  • Works with Claude Code, Codex, Cursor, OpenCode, Gemini and Zed, with different feature parity on each

That’s the first part. The rest of this guide is free too.

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