everything-claude-code-harness

Skill by ara.so — Daily 2026 Skills collection. Everything Claude Code (ECC) is a production-ready performance optimization system for AI agent harnesses. It provides specialized subagents, reusable skills, custom slash commands, memory-persisting hooks, security scanning, and language-specific rules — all evolved from 10+ months of daily real-world use. Works across Claude Code, Cursor, Codex, OpenCode, and Antigravity. Claude Code plugins cannot auto-distribute rules — install them manually via ./install.sh or copy from rules/ into your project's .claude/rules/ directory. After installation, use the namespaced form (plugin install) or short form (manual install): With manual install, drop the everything-claude-code: prefix: /plan , /sessions , etc. ECC hooks fire at agent lifecycle events. Control strictness at runtime without editing files: Hook events covered: SessionStart , Stop , PostEdit , PreBash , PostBash , and more.