Agent skill · software engineering · aradotso
everything-claude-code-harness
Agent harness performance system for Claude Code and other AI coding agents — skills, instincts, memory, hooks, commands, and security scanning
Why this skill is useful
Adds multiple executable scripts and specialized commands for optimizing AI agent performance that aren't available in public documentation.
What it needs
Requires git installed locally. About 6k tokens when loaded. Last updated 2026-07-09. 70 stars on the source repository.
What this skill does
Everything Claude Code (ECC) — Agent Harness Performance System 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. --- Installation Option 1: Plugin Marketplace (Recommended) Option 2: Manual Clone Install Rules (Always Required) Claude Code plugins cannot auto-distribute rules — install them manually via ./install.sh or copy from rules/ into your project's .claude/rules/ directory. --- Directory Structure --- Key Commands 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. --- Hook Runtime Controls ECC hooks fire at agent lifecycle events. Control strictness at runtime without editing files: Hook events covered: SessionStart, Stop, PostEdit, PreBash, PostBash, and more. --- Package Manager Detection ECC auto-detects your package manager with this priority chain: 1. CLAUDEPACKAGEMANAGER environment variable 2. .claude/package-manager.json (project-level) 3. package.json → packageManager field 4. Lock file detection (package-lock.json, yarn.lock, pnpm-lock.yaml, bun.lockb) 5. ~/.claude/package-manager.json (global) 6. First available manager as fallback --- Skills System Skills are markdown modules the agent loads to gain domain expertise. Install individually or in bulk. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aradotso/everything-claude-code-harness