
everything-claude-code-harness
Agent harness performance system for Claude Code and other AI coding agents — skills, instincts, memory, hooks, commands, and security scanning
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/reason-machines/trending-skills --skill everything-claude-code-harness- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads everything-claude-code-harness automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
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)
# Inside Claude Code, run:
/plugin marketplace add affaan-m/everything-claude-code
/plugin install everything-claude-code@everything-claude-code
Option 2: Manual Clone
git clone https://github.com/affaan-m/everything-claude-code.git
cd everything-claude-code
# Install rules for your language stack
./install.sh typescript
# Multiple languages:
./install.sh typescript python golang swift
# Target a specific IDE:
./install.sh --target cursor typescript
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
everything-claude-code/
├── .claude-plugin/ # Plugin and marketplace manifests
│ ├── plugin.json
│ └── marketplace.json
├── agents/ # Specialized subagents (planner, architect, etc.)
├── commands/ # Slash commands (/plan, /security-scan, etc.)
├── skills/ # Reusable skill modules
├── hooks/ # Lifecycle hooks (SessionStart, Stop, PostEdit, etc.)
├── rules/
│ ├── common/ # Language-agnostic rules
│ ├── typescript/
│ ├── python/
│ ├── golang/
│ └── swift/
├── scripts/ # Setup and utility scripts
└── install.sh # Interactive installer
Key Commands
After installation, use the namespaced form (plugin install) or short form (manual install):
# Planning & architecture
/everything-claude-code:plan "Add OAuth2 login flow"
/everything-claude-code:architect "Design a multi-tenant SaaS system"
# Research-first development
/everything-claude-code:research "Best approach for rate limiting in Node.js"
# Security
/everything-claude-code:security-scan
/everything-claude-code:harness-audit
# Agent loops and orchestration
/everything-claude-code:loop-start
/everything-claude-code:loop-status
/everything-claude-code:quality-gate
/everything-claude-code:model-route
# Multi-agent workflows
/everything-claude-code:multi-plan
/everything-claude-code:multi-execute
/everything-claude-code:multi-backend
/everything-claude-code:multi-frontend
# Session and memory
/everything-claude-code:sessions
/everything-claude-code:instinct-import
# PM2 orchestration
/everything-claude-code:pm2
# Package manager setup
/everything-claude-code:setup-pm
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:
# Set hook strictness profile
export ECC_HOOK_PROFILE=minimal # Least intrusive
export ECC_HOOK_PROFILE=standard # Default
export ECC_HOOK_PROFILE=strict # Maximum enforcement
# Disable specific hooks by ID (comma-separated)
export ECC_DISABLED_HOOKS="pre:bash:tmux-reminder,post:edit:typecheck"
Hook events covered: SessionStart, Stop, PostEdit, PreBash, PostBash, and more.
Package Manager Detection
ECC auto-detects your package manager with this priority chain:
CLAUDE_PACKAGE_MANAGERenvironment variable.claude/package-manager.json(project-level)package.json→packageManagerfield- Lock file detection (
package-lock.json,yarn.lock,pnpm-lock.yaml,bun.lockb) ~/.claude/package-manager.json(global)- First available manager as fallback
# Set via environment
export CLAUDE_PACKAGE_MANAGER=pnpm
# Set globally
node scripts/setup-package-manager.js --global pnpm
# Set per-project
node scripts/setup-package-manager.js --project bun
# Detect current setting
node scripts/setup-package-manager.js --detect
Skills System
Skills are markdown modules the agent loads to gain domain expertise. Install individually or in bulk.
Using a Skill
# Reference a skill explicitly in your prompt
"Use the search-first skill to find the right caching approach before implementing"
# Or trigger via slash command
/everything-claude-code:research "content hashing strategies for API responses"
Notable Built-in Skills
| Skill | Purpose |
|---|---|
search-first | Research before coding — avoids hallucinated APIs |
cost-aware-llm-pipeline | Optimizes token spend across model calls |
content-hash-cache-pattern | Cache invalidation via content hashing |
skill-stocktake | Audits which skills are loaded and active |
frontend-slides | Zero-dependency HTML presentation builder |
configure-ecc | Guided interactive ECC setup wizard |
swift-actor-persistence | Swift concurrency + persistence patterns |
regex-vs-llm-structured-text | Decides when to use regex vs LLM parsing |
Writing a Custom Skill
Create skills/my-skill.md:
---
name: my-skill
description: What this skill does
triggers:
- "phrase that activates this skill"
---
# My Skill
## When to Use
...
## Pattern
\`\`\`typescript
// concrete example
\`\`\`
## Rules
- Rule one
- Rule two
Instincts System (Continuous Learning)
Instincts are session-extracted patterns saved for reuse. They carry confidence scores and evolve over time.
Export an Instinct
/everything-claude-code:instinct-import
Instinct File Format
---
name: prefer-zod-for-validation
confidence: 0.92
extracted_from: session-2026-02-14
---
# Action
Always use Zod for runtime schema validation in TypeScript projects.
# Evidence
Caught 3 runtime type errors that TypeScript alone missed during session.
# Examples
\`\`\`typescript
import { z } from 'zod'
const UserSchema = z.object({
id: z.string().uuid(),
email: z.string().email(),
role: z.enum(['admin', 'user'])
})
type User = z.infer<typeof UserSchema>
\`\`\`
Rules Architecture
Rules enforce coding standards per language. Install only what your stack needs.
# TypeScript + Python
./install.sh typescript python
# Check what's installed
ls .claude/rules/
Rule Directory Layout
rules/
├── common/ # Applies to all languages
│ ├── research-first.md
│ ├── security-baseline.md
│ └── verification-loops.md
├── typescript/
│ ├── no-any.md
│ ├── zod-validation.md
│ └── strict-mode.md
├── python/
│ ├── type-hints.md
│ └── django-patterns.md
└── golang/
└── error-wrapping.md
Agents (Subagent Delegation)
Agents are specialized personas the orchestrator delegates to:
# In your prompt, reference an agent explicitly
"Delegate architecture decisions to the architect agent"
"Use the planner agent to break this feature into tasks"
Available agents include: planner, architect, researcher, verifier, security-auditor, and more. Each lives in agents/<name>.md with its own system prompt, tools list, and constraints.
AgentShield Security Scanning
Run security scans directly from Claude Code:
/everything-claude-code:security-scan
This invokes the AgentShield scanner (1282 tests, 102 rules) against your codebase and surfaces:
- Hardcoded secrets
- Injection vulnerabilities
- Insecure dependencies
- Agent prompt injection patterns
Memory Persistence Hooks
ECC hooks automatically save and restore session context:
// hooks/session-start.js — loads prior context on new session
const fs = require('fs')
const path = require('path')
const memoryPath = path.join(process.env.HOME, '.claude', 'session-memory.json')
if (fs.existsSync(memoryPath)) {
const memory = JSON.parse(fs.readFileSync(memoryPath, 'utf8'))
console.log('Restored session context:', memory.summary)
}
// hooks/stop.js — saves session summary on exit
const summary = {
timestamp: new Date().toISOString(),
summary: process.env.ECC_SESSION_SUMMARY || '',
skills_used: (process.env.ECC_SKILLS_USED || '').split(',')
}
fs.writeFileSync(memoryPath, JSON.stringify(summary, null, 2))
Cross-Platform Support
| Platform | Support |
|---|---|
| Claude Code | Full (agents, commands, skills, hooks, rules) |
| Cursor | Full (via --target cursor installer flag) |
| OpenCode | Full (plugin system, 20+ hook event types, 3 native tools) |
| Codex CLI | Full (codex.md generated via /codex-setup) |
| Codex App | Full (AGENTS.md-based) |
| Antigravity | Full (via --target antigravity installer flag) |
Common Patterns
Research-First Development
"Before implementing the payment webhook handler, use the search-first skill to
verify current Stripe webhook verification best practices."
Token Optimization
# Route to cheaper model for simple tasks
/everything-claude-code:model-route "Write a unit test for this pure function"
# Use background processes for long analysis
/everything-claude-code:harness-audit
Parallelization with Git Worktrees
# Create isolated worktrees for parallel agent tasks
git worktree add ../feature-auth -b feature/auth
git worktree add ../feature-payments -b feature/payments
# Each Claude Code session operates in its own worktree
# Merge when both complete
Verification Loop
/everything-claude-code:loop-start # Begin tracked loop
# ... agent does work ...
/everything-claude-code:loop-status # Check progress
/everything-claude-code:quality-gate # Enforce pass criteria before merge
Troubleshooting
Plugin commands not found after install
/plugin list everything-claude-code@everything-claude-code
# If empty, re-run: /plugin install everything-claude-code@everything-claude-code
Rules not applied
# Rules require manual install — plugin system cannot distribute them
cd everything-claude-code && ./install.sh typescript
# Verify:
ls ~/.claude/rules/ # or .claude/rules/ in project root
Hooks not firing
# Check profile setting
echo $ECC_HOOK_PROFILE
# Check disabled list
echo $ECC_DISABLED_HOOKS
# Reset to defaults
unset ECC_HOOK_PROFILE
unset ECC_DISABLED_HOOKS
Instinct import drops content
Ensure you're on v1.4.1+. Earlier versions had a bug where parse_instinct_file() silently dropped Action/Evidence/Examples sections. Pull latest and re-run.
Wrong package manager used
node scripts/setup-package-manager.js --detect
export CLAUDE_PACKAGE_MANAGER=pnpm # Override explicitly
Resources
- Homepage: https://ecc.tools
- GitHub: https://github.com/affaan-m/everything-claude-code
- GitHub App (Marketplace): https://github.com/marketplace/ecc-tools
- npm (universal):
ecc-universal - npm (security):
ecc-agentshield - Shorthand Guide: https://x.com/affaanmustafa/status/2012378465664745795
- Longform Guide: https://x.com/affaanmustafa/status/2014040193557471352
FAQ
What does the everything-claude-code-harness skill do?
Agent harness performance system for Claude Code and other AI coding agents — skills, instincts, memory, hooks, commands, and security scanning
How do I install everything-claude-code-harness?
Run npx skills add https://github.com/reason-machines/trending-skills --skill everything-claude-code-harness in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/everything-claude-code-harness/ (personal) or .claude/skills/everything-claude-code-harness/ (project).
Which AI agents can use everything-claude-code-harness?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is everything-claude-code-harness safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains everything-claude-code-harness?
It is published by reason-machines in reason-machines/trending-skills. It has 1,831 recorded installs.
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