Directory · Claude Code extensions

ECC

Plugin bundling agents, skills, hooks, memory, and security scanning to give Claude Code and other harnesses a structured dev workflow.

★ 278,556 stars · last updated 2026-10-12 · Free, open source · View on GitHub

Best for

• Claude Code users wanting a plan, test, review, verify workflow installed as a plugin
• Teams looking for a large prebuilt library of agents and skills
• Scanning agent configs, hooks, MCP settings, and secrets with AgentShield
• Developers using multiple harnesses such as Codex, Cursor, or OpenCode

Install

npx ecc-universal@2.2.3 setup

Our take

MIT-licensed and actively maintained by a single maintainer, it ships 71 agents, 311 skills, and 97 legacy command shims, with Claude Code as the best-supported target and capability-limited adapters for other harnesses. Requires Node.js 18+, Git, and Claude Code 2.1+; the README warns against stacking manual installs on the plugin and against unofficial mirrors. A paid hosted GitHub App (ECC Pro) exists for private repos alongside the free open-source plugin.

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