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50K+ stars | 6K+ forks | 30 contributors | 6 languages supported | Anthropic Hackathon Winner

The complete collection of Claude Code configs from an Anthropic hackathon winner.

Production-ready agents, skills, hooks, commands, rules, and MCP configurations evolved over 10+ months of intensive daily use building real products.

This repo is the raw code only. The guides explain everything.

Shorthand Guide Setup, foundations, philosophy. Read this first.	Longform Guide Token optimization, memory persistence, evals, parallelization.

• Codex CLI support — New /codex-setup command generates codex.md for OpenAI Codex CLI compatibility
• 7 new skills — search-first, swift-actor-persistence, swift-protocol-di-testing, regex-vs-llm-structured-text, content-hash-cache-pattern, cost-aware-llm-pipeline, skill-stocktake
• AgentShield integration — /security-scan skill runs AgentShield directly from Claude Code; 1282 tests, 102 rules
• GitHub Marketplace — ECC Tools GitHub App live at github.com/marketplace/ecc-tools with free/pro/enterprise tiers
• 30+ community PRs merged — Contributions from 30 contributors across 6 languages
• 978 internal tests — Expanded validation suite across agents, skills, commands, hooks, and rules

• Fixed instinct import content loss — parse_instinct_file() was silently dropping all content after frontmatter (Action, Evidence, Examples sections) during /instinct-import. Fixed by community contributor @ericcai0814 (#148, #161)

• Interactive installation wizard — New configure-ecc skill provides guided setup with merge/overwrite detection
• PM2 & multi-agent orchestration — 6 new commands (/pm2, /multi-plan, /multi-execute, /multi-backend, /multi-frontend, /multi-workflow) for managing complex multi-service workflows
• Multi-language rules architecture — Rules restructured from flat files into common/ + typescript/ + python/ + golang/ directories. Install only the languages you need
• Chinese (zh-CN) translations — Complete translation of all agents, commands, skills, and rules (80+ files)
• GitHub Sponsors support — Sponsor the project via GitHub Sponsors
• Enhanced CONTRIBUTING.md — Detailed PR templates for each contribution type

• Full OpenCode integration — 12 agents, 24 commands, 16 skills with hook support via OpenCode's plugin system (20+ event types)
• 3 native custom tools — run-tests, check-coverage, security-audit
• LLM documentation — llms.txt for comprehensive OpenCode docs

• Python/Django support — Django patterns, security, TDD, and verification skills
• Java Spring Boot skills — Patterns, security, TDD, and verification for Spring Boot
• Session management — /sessions command for session history
• Continuous learning v2 — Instinct-based learning with confidence scoring, import/export, evolution

See the full changelog in Releases.

Get up and running in under 2 minutes:

# Add marketplace
/plugin marketplace add affaan-m/everything-claude-code

# Install plugin
/plugin install everything-claude-code@everything-claude-code

⚠️ Important: Claude Code plugins cannot distribute rules automatically. Install them manually:

# Clone the repo first
git clone https://github.com/affaan-m/everything-claude-code.git
cd everything-claude-code

# Recommended: use the installer (handles common + language rules safely)
./install.sh typescript    # or python or golang
# You can pass multiple languages:
# ./install.sh typescript python golang
# or target cursor:
# ./install.sh --target cursor typescript

For manual install instructions see the README in the rules/ folder.

# Try a command
/plan "Add user authentication"

# Check available commands
/plugin list everything-claude-code@everything-claude-code

✨ That's it! You now have access to 13 agents, 48 skills, and 32 commands.

This plugin now fully supports Windows, macOS, and Linux. All hooks and scripts have been rewritten in Node.js for maximum compatibility.

The plugin automatically detects your preferred package manager (npm, pnpm, yarn, or bun) with the following priority:

1. Environment variable: CLAUDE_PACKAGE_MANAGER
2. Project config: .claude/package-manager.json
3. package.json: packageManager field
4. Lock file: Detection from package-lock.json, yarn.lock, pnpm-lock.yaml, or bun.lockb
5. Global config: ~/.claude/package-manager.json
6. Fallback: First available package manager

To set your preferred package manager:

# Via environment variable
export CLAUDE_PACKAGE_MANAGER=pnpm

# Via global config
node scripts/setup-package-manager.js --global pnpm

# Via project config
node scripts/setup-package-manager.js --project bun

# Detect current setting
node scripts/setup-package-manager.js --detect

Or use the /setup-pm command in Claude Code.

This repo is a Claude Code plugin - install it directly or copy components manually.

everything-claude-code/
|-- .claude-plugin/   # Plugin and marketplace manifests
|   |-- plugin.json         # Plugin metadata and component paths
|   |-- marketplace.json    # Marketplace catalog for /plugin marketplace add
|
|-- agents/           # Specialized subagents for delegation
|   |-- planner.md           # Feature implementation planning
|   |-- architect.md         # System design decisions
|   |-- tdd-guide.md         # Test-driven development
|   |-- code-reviewer.md     # Quality and security review
|   |-- security-reviewer.md # Vulnerability analysis
|   |-- build-error-resolver.md
|   |-- e2e-runner.md        # Playwright E2E testing
|   |-- refactor-cleaner.md  # Dead code cleanup
|   |-- doc-updater.md       # Documentation sync
|   |-- go-reviewer.md       # Go code review
|   |-- go-build-resolver.md # Go build error resolution
|   |-- python-reviewer.md   # Python code review (NEW)
|   |-- database-reviewer.md # Database/Supabase review (NEW)
|
|-- skills/           # Workflow definitions and domain knowledge
|   |-- coding-standards/           # Language best practices
|   |-- clickhouse-io/              # ClickHouse analytics, queries, data engineering
|   |-- backend-patterns/           # API, database, caching patterns
|   |-- frontend-patterns/          # React, Next.js patterns
|   |-- continuous-learning/        # Auto-extract patterns from sessions (Longform Guide)
|   |-- continuous-learning-v2/     # Instinct-based learning with confidence scoring
|   |-- iterative-retrieval/        # Progressive context refinement for subagents
|   |-- strategic-compact/          # Manual compaction suggestions (Longform Guide)
|   |-- tdd-workflow/               # TDD methodology
|   |-- security-review/            # Security checklist
|   |-- eval-harness/               # Verification loop evaluation (Longform Guide)
|   |-- verification-loop/          # Continuous verification (Longform Guide)
|   |-- golang-patterns/            # Go idioms and best practices
|   |-- golang-testing/             # Go testing patterns, TDD, benchmarks
|   |-- cpp-coding-standards/         # C++ coding standards from C++ Core Guidelines (NEW)
|   |-- cpp-testing/                # C++ testing with GoogleTest, CMake/CTest (NEW)
|   |-- django-patterns/            # Django patterns, models, views (NEW)
|   |-- django-security/            # Django security best practices (NEW)
|   |-- django-tdd/                 # Django TDD workflow (NEW)
|   |-- django-verification/        # Django verification loops (NEW)
|   |-- python-patterns/            # Python idioms and best practices (NEW)
|   |-- python-testing/             # Python testing with pytest (NEW)
|   |-- springboot-patterns/        # Java Spring Boot patterns (NEW)
|   |-- springboot-security/        # Spring Boot security (NEW)
|   |-- springboot-tdd/             # Spring Boot TDD (NEW)
|   |-- springboot-verification/    # Spring Boot verification (NEW)
|   |-- configure-ecc/              # Interactive installation wizard (NEW)
|   |-- security-scan/              # AgentShield security auditor integration (NEW)
|   |-- java-coding-standards/     # Java coding standards (NEW)
|   |-- jpa-patterns/              # JPA/Hibernate patterns (NEW)
|   |-- postgres-patterns/         # PostgreSQL optimization patterns (NEW)
|   |-- nutrient-document-processing/ # Document processing with Nutrient API (NEW)
|   |-- project-guidelines-example/   # Template for project-specific skills
|   |-- database-migrations/         # Migration patterns (Prisma, Drizzle, Django, Go) (NEW)
|   |-- api-design/                  # REST API design, pagination, error responses (NEW)
|   |-- deployment-patterns/         # CI/CD, Docker, health checks, rollbacks (NEW)
|   |-- docker-patterns/            # Docker Compose, networking, volumes, container security (NEW)
|   |-- e2e-testing/                 # Playwright E2E patterns and Page Object Model (NEW)
|   |-- content-hash-cache-pattern/  # SHA-256 content hash caching for file processing (NEW)
|   |-- cost-aware-llm-pipeline/     # LLM cost optimization, model routing, budget tracking (NEW)
|   |-- regex-vs-llm-structured-text/ # Decision framework: regex vs LLM for text parsing (NEW)
|   |-- swift-actor-persistence/     # Thread-safe Swift data persistence with actors (NEW)
|   |-- swift-protocol-di-testing/   # Protocol-based DI for testable Swift code (NEW)
|   |-- search-first/               # Research-before-coding workflow (NEW)
|   |-- skill-stocktake/            # Audit skills and commands for quality (NEW)
|   |-- liquid-glass-design/         # iOS 26 Liquid Glass design system (NEW)
|   |-- foundation-models-on-device/ # Apple on-device LLM with FoundationModels (NEW)
|   |-- swift-concurrency-6-2/       # Swift 6.2 Approachable Concurrency (NEW)
|
|-- commands/         # Slash commands for quick execution
|   |-- tdd.md              # /tdd - Test-driven development
|   |-- plan.md             # /plan - Implementation planning
|   |-- e2e.md              # /e2e - E2E test generation
|   |-- code-review.md      # /code-review - Quality review
|   |-- build-fix.md        # /build-fix - Fix build errors
|   |-- refactor-clean.md   # /refactor-clean - Dead code removal
|   |-- learn.md            # /learn - Extract patterns mid-session (Longform Guide)
|   |-- learn-eval.md       # /learn-eval - Extract, evaluate, and save patterns (NEW)
|   |-- checkpoint.md       # /checkpoint - Save verification state (Longform Guide)
|   |-- verify.md           # /verify - Run verification loop (Longform Guide)
|   |-- setup-pm.md         # /setup-pm - Configure package manager
|   |-- go-review.md        # /go-review - Go code review (NEW)
|   |-- go-test.md          # /go-test - Go TDD workflow (NEW)
|   |-- go-build.md         # /go-build - Fix Go build errors (NEW)
|   |-- skill-create.md     # /skill-create - Generate skills from git history (NEW)
|   |-- instinct-status.md  # /instinct-status - View learned instincts (NEW)
|   |-- instinct-import.md  # /instinct-import - Import instincts (NEW)
|   |-- instinct-export.md  # /instinct-export - Export instincts (NEW)
|   |-- evolve.md           # /evolve - Cluster instincts into skills
|   |-- pm2.md              # /pm2 - PM2 service lifecycle management (NEW)
|   |-- multi-plan.md       # /multi-plan - Multi-agent task decomposition (NEW)
|   |-- multi-execute.md    # /multi-execute - Orchestrated multi-agent workflows (NEW)
|   |-- multi-backend.md    # /multi-backend - Backend multi-service orchestration (NEW)
|   |-- multi-frontend.md   # /multi-frontend - Frontend multi-service orchestration (NEW)
|   |-- multi-workflow.md   # /multi-workflow - General multi-service workflows (NEW)
|   |-- orchestrate.md      # /orchestrate - Multi-agent coordination
|   |-- sessions.md         # /sessions - Session history management
|   |-- eval.md             # /eval - Evaluate against criteria
|   |-- test-coverage.md    # /test-coverage - Test coverage analysis
|   |-- update-docs.md      # /update-docs - Update documentation
|   |-- update-codemaps.md  # /update-codemaps - Update codemaps
|   |-- python-review.md    # /python-review - Python code review (NEW)
|
|-- rules/            # Always-follow guidelines (copy to ~/.claude/rules/)
|   |-- README.md            # Structure overview and installation guide
|   |-- common/              # Language-agnostic principles
|   |   |-- coding-style.md    # Immutability, file organization
|   |   |-- git-workflow.md    # Commit format, PR process
|   |   |-- testing.md         # TDD, 80% coverage requirement
|   |   |-- performance.md     # Model selection, context management
|   |   |-- patterns.md        # Design patterns, skeleton projects
|   |   |-- hooks.md           # Hook architecture, TodoWrite
|   |   |-- agents.md          # When to delegate to subagents
|   |   |-- security.md        # Mandatory security checks
|   |-- typescript/          # TypeScript/JavaScript specific
|   |-- python/              # Python specific
|   |-- golang/              # Go specific
|
|-- hooks/            # Trigger-based automations
|   |-- README.md                 # Hook documentation, recipes, and customization guide
|   |-- hooks.json                # All hooks config (PreToolUse, PostToolUse, Stop, etc.)
|   |-- memory-persistence/       # Session lifecycle hooks (Longform Guide)
|   |-- strategic-compact/        # Compaction suggestions (Longform Guide)
|
|-- scripts/          # Cross-platform Node.js scripts (NEW)
|   |-- lib/                     # Shared utilities
|   |   |-- utils.js             # Cross-platform file/path/system utilities
|   |   |-- package-manager.js   # Package manager detection and selection
|   |-- hooks/                   # Hook implementations
|   |   |-- session-start.js     # Load context on session start
|   |   |-- session-end.js       # Save state on session end
|   |   |-- pre-compact.js       # Pre-compaction state saving
|   |   |-- suggest-compact.js   # Strategic compaction suggestions
|   |   |-- evaluate-session.js  # Extract patterns from sessions
|   |-- setup-package-manager.js # Interactive PM setup
|
|-- tests/            # Test suite (NEW)
|   |-- lib/                     # Library tests
|   |-- hooks/                   # Hook tests
|   |-- run-all.js               # Run all tests
|
|-- contexts/         # Dynamic system prompt injection contexts (Longform Guide)
|   |-- dev.md              # Development mode context
|   |-- review.md           # Code review mode context
|   |-- research.md         # Research/exploration mode context
|
|-- examples/         # Example configurations and sessions
|   |-- CLAUDE.md             # Example project-level config
|   |-- user-CLAUDE.md        # Example user-level config
|   |-- saas-nextjs-CLAUDE.md   # Real-world SaaS (Next.js + Supabase + Stripe)
|   |-- go-microservice-CLAUDE.md # Real-world Go microservice (gRPC + PostgreSQL)
|   |-- django-api-CLAUDE.md      # Real-world Django REST API (DRF + Celery)
|   |-- rust-api-CLAUDE.md        # Real-world Rust API (Axum + SQLx + PostgreSQL) (NEW)
|
|-- mcp-configs/      # MCP server configurations
|   |-- mcp-servers.json    # GitHub, Supabase, Vercel, Railway, etc.
|
|-- marketplace.json  # Self-hosted marketplace config (for /plugin marketplace add)

Two ways to generate Claude Code skills from your repository:

Use the /skill-create command for local analysis without external services:

/skill-create                    # Analyze current repo
/skill-create --instincts        # Also generate instincts for continuous-learning

This analyzes your git history locally and generates SKILL.md files.

For advanced features (10k+ commits, auto-PRs, team sharing):

Install GitHub App | ecc.tools

# Comment on any issue:
/skill-creator analyze

# Or auto-triggers on push to default branch

Both options create:

• SKILL.md files - Ready-to-use skills for Claude Code
• Instinct collections - For continuous-learning-v2
• Pattern extraction - Learns from your commit history

Built at the Claude Code Hackathon (Cerebral Valley x Anthropic, Feb 2026). 1282 tests, 98% coverage, 102 static analysis rules.

Scan your Claude Code configuration for vulnerabilities, misconfigurations, and injection risks.

# Quick scan (no install needed)
npx ecc-agentshield scan

# Auto-fix safe issues
npx ecc-agentshield scan --fix

# Deep analysis with three Opus 4.6 agents
npx ecc-agentshield scan --opus --stream

# Generate secure config from scratch
npx ecc-agentshield init

What it scans: CLAUDE.md, settings.json, MCP configs, hooks, agent definitions, and skills across 5 categories — secrets detection (14 patterns), permission auditing, hook injection analysis, MCP server risk profiling, and agent config review.

The --opus flag runs three Claude Opus 4.6 agents in a red-team/blue-team/auditor pipeline. The attacker finds exploit chains, the defender evaluates protections, and the auditor synthesizes both into a prioritized risk assessment. Adversarial reasoning, not just pattern matching.

Output formats: Terminal (color-graded A-F), JSON (CI pipelines), Markdown, HTML. Exit code 2 on critical findings for build gates.

Use /security-scan in Claude Code to run it, or add to CI with the GitHub Action.

GitHub | npm

The instinct-based learning system automatically learns your patterns:

/instinct-status        # Show learned instincts with confidence
/instinct-import <file> # Import instincts from others
/instinct-export        # Export your instincts for sharing
/evolve                 # Cluster related instincts into skills

See skills/continuous-learning-v2/ for full documentation.

Minimum version: v2.1.0 or later

This plugin requires Claude Code CLI v2.1.0+ due to changes in how the plugin system handles hooks.

Check your version:

claude --version

⚠️ For Contributors: Do NOT add a "hooks" field to .claude-plugin/plugin.json. This is enforced by a regression test.

Claude Code v2.1+ automatically loads hooks/hooks.json from any installed plugin by convention. Explicitly declaring it in plugin.json causes a duplicate detection error:

Duplicate hooks file detected: ./hooks/hooks.json resolves to already-loaded file

History: This has caused repeated fix/revert cycles in this repo (#29, #52, #103). The behavior changed between Claude Code versions, leading to confusion. We now have a regression test to prevent this from being reintroduced.

The easiest way to use this repo - install as a Claude Code plugin:

# Add this repo as a marketplace
/plugin marketplace add affaan-m/everything-claude-code

# Install the plugin
/plugin install everything-claude-code@everything-claude-code

Or add directly to your ~/.claude/settings.json:

{
  "extraKnownMarketplaces": {
    "everything-claude-code": {
      "source": {
        "source": "github",
        "repo": "affaan-m/everything-claude-code"
      }
    }
  },
  "enabledPlugins": {
    "everything-claude-code@everything-claude-code": true
  }
}

This gives you instant access to all commands, agents, skills, and hooks.

Note: The Claude Code plugin system does not support distributing rules via plugins (upstream limitation). You need to install rules manually:

# Clone the repo first
git clone https://github.com/affaan-m/everything-claude-code.git

# Option A: User-level rules (applies to all projects)
mkdir -p ~/.claude/rules
cp -r everything-claude-code/rules/common/* ~/.claude/rules/
cp -r everything-claude-code/rules/typescript/* ~/.claude/rules/   # pick your stack
cp -r everything-claude-code/rules/python/* ~/.claude/rules/
cp -r everything-claude-code/rules/golang/* ~/.claude/rules/

# Option B: Project-level rules (applies to current project only)
mkdir -p .claude/rules
cp -r everything-claude-code/rules/common/* .claude/rules/
cp -r everything-claude-code/rules/typescript/* .claude/rules/     # pick your stack

If you prefer manual control over what's installed:

# Clone the repo
git clone https://github.com/affaan-m/everything-claude-code.git

# Copy agents to your Claude config
cp everything-claude-code/agents/*.md ~/.claude/agents/

# Copy rules (common + language-specific)
cp -r everything-claude-code/rules/common/* ~/.claude/rules/
cp -r everything-claude-code/rules/typescript/* ~/.claude/rules/   # pick your stack
cp -r everything-claude-code/rules/python/* ~/.claude/rules/
cp -r everything-claude-code/rules/golang/* ~/.claude/rules/

# Copy commands
cp everything-claude-code/commands/*.md ~/.claude/commands/

# Copy skills
cp -r everything-claude-code/skills/* ~/.claude/skills/

Copy the hooks from hooks/hooks.json to your ~/.claude/settings.json.

Copy desired MCP servers from mcp-configs/mcp-servers.json to your ~/.claude.json.

Important: Replace YOUR_*_HERE placeholders with your actual API keys.

Subagents handle delegated tasks with limited scope. Example:

---
name: code-reviewer
description: Reviews code for quality, security, and maintainability
tools: ["Read", "Grep", "Glob", "Bash"]
model: opus
---

You are a senior code reviewer...

Skills are workflow definitions invoked by commands or agents:

# TDD Workflow

1. Define interfaces first
2. Write failing tests (RED)
3. Implement minimal code (GREEN)
4. Refactor (IMPROVE)
5. Verify 80%+ coverage

Hooks fire on tool events. Example - warn about console.log:

{
  "matcher": "tool == \"Edit\" && tool_input.file_path matches \"\\\\.(ts|tsx|js|jsx)$\"",
  "hooks": [{
    "type": "command",
    "command": "#!/bin/bash\ngrep -n 'console\\.log' \"$file_path\" && echo '[Hook] Remove console.log' >&2"
  }]
}

Rules are always-follow guidelines, organized into common/ (language-agnostic) + language-specific directories:

rules/
  common/          # Universal principles (always install)
  typescript/      # TS/JS specific patterns and tools
  python/          # Python specific patterns and tools
  golang/          # Go specific patterns and tools

See rules/README.md for installation and structure details.

Not sure where to start? Use this quick reference:

Starting a new feature:

/plan "Add user authentication with OAuth"   → planner creates implementation blueprint
/tdd                                          → tdd-guide enforces write-tests-first
/code-review                                  → code-reviewer checks your work

Fixing a bug:

/tdd                                          → tdd-guide: write a failing test that reproduces it
                                              → implement the fix, verify test passes
/code-review                                  → code-reviewer: catch regressions

Preparing for production:

/security-scan                                → security-reviewer: OWASP Top 10 audit
/e2e                                          → e2e-runner: critical user flow tests
/test-coverage                                → verify 80%+ coverage

/plugin list everything-claude-code@everything-claude-code

// In your project's .claude/settings.json
{
  "disabledMcpServers": ["supabase", "railway", "vercel"]
}

# Just agents
cp everything-claude-code/agents/*.md ~/.claude/agents/

# Just rules
cp -r everything-claude-code/rules/common/* ~/.claude/rules/

The plugin includes a comprehensive test suite:

# Run all tests
node tests/run-all.js

# Run individual test files
node tests/lib/utils.test.js
node tests/lib/package-manager.test.js
node tests/hooks/hooks.test.js

Contributions are welcome and encouraged.

This repo is meant to be a community resource. If you have:

• Useful agents or skills
• Clever hooks
• Better MCP configurations
• Improved rules

Please contribute! See CONTRIBUTING.md for guidelines.

• Language-specific skills (Rust, C#, Swift, Kotlin) — Go, Python, Java already included
• Framework-specific configs (Rails, Laravel, FastAPI, NestJS) — Django, Spring Boot already included
• DevOps agents (Kubernetes, Terraform, AWS, Docker)
• Testing strategies (different frameworks, visual regression)
• Domain-specific knowledge (ML, data engineering, mobile)

ECC provides full Cursor IDE support with hooks, rules, agents, skills, commands, and MCP configs adapted for Cursor's native format.

# Install for your language(s)
./install.sh --target cursor typescript
./install.sh --target cursor python golang swift

Cursor has more hook events than Claude Code (20 vs 8). The .cursor/hooks/adapter.js module transforms Cursor's stdin JSON to Claude Code's format, allowing existing scripts/hooks/*.js to be reused without duplication.

Cursor stdin JSON → adapter.js → transforms → scripts/hooks/*.js
                                              (shared with Claude Code)

Key hooks:

• beforeShellExecution — Blocks dev servers outside tmux (exit 2), git push review
• afterFileEdit — Auto-format + TypeScript check + console.log warning
• beforeSubmitPrompt — Detects secrets (sk-, ghp_, AKIA patterns) in prompts
• beforeTabFileRead — Blocks Tab from reading .env, .key, .pem files (exit 2)
• beforeMCPExecution / afterMCPExecution — MCP audit logging

Cursor rules use YAML frontmatter with description, globs, and alwaysApply:

---
description: "TypeScript coding style extending common rules"
globs: ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.jsx"]
alwaysApply: false
---

ECC provides first-class Codex CLI support with a reference configuration, Codex-specific AGENTS.md supplement, and 10 ported skills.

# Copy the reference config to your home directory
cp .codex/config.toml ~/.codex/config.toml

# Run Codex in the repo — AGENTS.md is auto-detected
codex

Skills at .agents/skills/ are auto-loaded by Codex:

Codex CLI does not yet support hooks (GitHub Issue #2109, 430+ upvotes). Security enforcement is instruction-based via persistent_instructions in config.toml and the sandbox permission system.

ECC provides full OpenCode support including plugins and hooks.

# Install OpenCode
npm install -g opencode

# Run in the repository root
opencode

The configuration is automatically detected from .opencode/opencode.json.

OpenCode's plugin system is MORE sophisticated than Claude Code with 20+ event types:

Additional OpenCode events: file.edited, file.watcher.updated, message.updated, lsp.client.diagnostics, tui.toast.show, and more.

Option 1: Use directly

cd everything-claude-code
opencode

Option 2: Install as npm package

npm install ecc-universal

Then add to your opencode.json:

{
  "plugin": ["ecc-universal"]
}

• Migration Guide: .opencode/MIGRATION.md
• OpenCode Plugin README: .opencode/README.md
• Consolidated Rules: .opencode/instructions/INSTRUCTIONS.md
• LLM Documentation: llms.txt (complete OpenCode docs for LLMs)

ECC is the first plugin to maximize every major AI coding tool. Here's how each harness compares:

Key architectural decisions:

• AGENTS.md at root is the universal cross-tool file (read by all 4 tools)
• DRY adapter pattern lets Cursor reuse Claude Code's hook scripts without duplication
• Skills format (SKILL.md with YAML frontmatter) works across Claude Code, Codex, and OpenCode
• Codex's lack of hooks is compensated by persistent_instructions and sandbox permissions

I've been using Claude Code since the experimental rollout. Won the Anthropic x Forum Ventures hackathon in Sep 2025 building zenith.chat with @DRodriguezFX - entirely using Claude Code.

These configs are battle-tested across multiple production applications.

Claude Code usage can be expensive if you don't manage token consumption. These settings significantly reduce costs without sacrificing quality.

Add to ~/.claude/settings.json:

{
  "model": "sonnet",
  "env": {
    "MAX_THINKING_TOKENS": "10000",
    "CLAUDE_AUTOCOMPACT_PCT_OVERRIDE": "50"
  }
}

Switch to Opus only when you need deep architectural reasoning:

/model opus

The strategic-compact skill (included in this plugin) suggests /compact at logical breakpoints instead of relying on auto-compaction at 95% context. See skills/strategic-compact/SKILL.md for the full decision guide.

When to compact:

• After research/exploration, before implementation
• After completing a milestone, before starting the next
• After debugging, before continuing feature work
• After a failed approach, before trying a new one

When NOT to compact:

• Mid-implementation (you'll lose variable names, file paths, partial state)

Critical: Don't enable all MCPs at once. Each MCP tool description consumes tokens from your 200k window, potentially reducing it to ~70k.

• Keep under 10 MCPs enabled per project
• Keep under 80 tools active
• Use disabledMcpServers in project config to disable unused ones

Agent Teams spawns multiple context windows. Each teammate consumes tokens independently. Only use for tasks where parallelism provides clear value (multi-module work, parallel reviews). For simple sequential tasks, subagents are more token-efficient.

Hitting daily limits? See the Token Optimization Guide for recommended settings and workflow tips.

Quick wins:

// ~/.claude/settings.json
{
  "model": "sonnet",
  "env": {
    "MAX_THINKING_TOKENS": "10000",
    "CLAUDE_AUTOCOMPACT_PCT_OVERRIDE": "50",
    "CLAUDE_CODE_SUBAGENT_MODEL": "haiku"
  }
}

Use /clear between unrelated tasks, /compact at logical breakpoints, and /cost to monitor spending.

These configs work for my workflow. You should:

1. Start with what resonates
2. Modify for your stack
3. Remove what you don't use
4. Add your own patterns

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• Skills Directory: awesome-agent-skills (community-maintained directory of agent skills)

MIT - Use freely, modify as needed, contribute back if you can.

Star this repo if it helps. Read both guides. Build something great.