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feat: Complete Phase 1 - Foundation and Documentation
## Phase 1 Achievements ✅ Repository Structure: - Created complete directory structure (skills/, evaluations/) - Updated .gitignore (removed docs/, keep .mcp.json) ✅ MCP Testing: - Verified n8n API availability (https://n8n-test.n8n-mcp.com) - Tested MCP tools comprehensively - Created MCP_TESTING_LOG.md with real tool responses ✅ Documentation: - README.md: Comprehensive project overview with data-driven insights - INSTALLATION.md: Complete installation guide for all platforms - USAGE.md: Detailed usage examples and cross-skill composition - DEVELOPMENT.md: Development guidelines and contribution process ## Key Insights from MCP Testing - 537 nodes available (437 base + 100 langchain) - 2,653 templates with metadata - nodeType format differences documented - Webhook data structure clarified ($json.body) - Auto-sanitization behavior documented - All n8n_* tools require API; all others don't ## Next: Phase 2 - Skill #1 (n8n Expression Syntax) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
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# n8n-skills
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n8n skillset for Claude Code to build flawless n8n workflows
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**Expert Claude Code skills for building flawless n8n workflows using the n8n-mcp MCP server**
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[](LICENSE)
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[](https://github.com/romualdczlonkowski/n8n-mcp)
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---
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## 🎯 What is this?
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This repository contains 5 complementary **Claude Code skills** that teach AI assistants how to build production-ready n8n workflows using the [n8n-mcp](https://github.com/your-link-here) MCP server.
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### Why These Skills Exist
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Based on analysis of **447,557 real MCP tool usage events**, we identified:
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- **20% failure rate** when using certain MCP tools incorrectly
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- **15,107 validation feedback loops** due to configuration errors
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- **813 searches for "webhook"** showing common workflow patterns
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- **31,917 workflows created** revealing proven architectural patterns
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These skills solve these problems by teaching Claude:
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- ✅ Correct n8n expression syntax ({{}} patterns)
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- ✅ How to use n8n-mcp tools effectively
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- ✅ Proven workflow patterns from real-world usage
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- ✅ Validation error interpretation and fixing
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- ✅ Operation-aware node configuration
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---
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## 📚 The 5 Skills
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### 1. **n8n Expression Syntax**
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Teaches correct n8n expression syntax and common patterns.
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**Activates when**: Writing expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors.
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**Key Features**:
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- Core variables ($json, $node, $now, $env)
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- **Critical gotcha**: Webhook data is under `$json.body`
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- Common mistakes catalog with fixes
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- When NOT to use expressions (Code nodes!)
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### 2. **n8n MCP Tools Expert** (HIGHEST PRIORITY)
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Expert guide for using n8n-mcp MCP tools effectively.
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**Activates when**: Searching for nodes, validating configurations, accessing templates, managing workflows.
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**Key Features**:
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- Tool selection guide (which tool for which task)
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- nodeType format differences (nodes-base.* vs n8n-nodes-base.*)
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- Validation profiles (minimal/runtime/ai-friendly/strict)
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- Smart parameters (branch="true" for IF nodes)
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- Auto-sanitization system explained
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**Impact**: **Fixes 20% MCP tool failure rate**
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### 3. **n8n Workflow Patterns**
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Build workflows using 5 proven architectural patterns from 31,917 real workflows.
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**Activates when**: Creating workflows, connecting nodes, designing automation.
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**Key Features**:
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- 5 proven patterns (webhook processing, HTTP API, database, AI, scheduled)
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- Workflow creation checklist
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- Real examples from 2,653 templates
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- Connection best practices
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- Pattern selection guide
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**Impact**: **Addresses 27.6% of all workflows (webhook processing)**
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### 4. **n8n Validation Expert**
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Interpret validation errors and guide fixing.
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**Activates when**: Validation fails, debugging workflow errors, handling false positives.
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**Key Features**:
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- Validation loop workflow
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- Real error catalog
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- Auto-sanitization behavior explained
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- False positives guide
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- Profile selection for different stages
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### 5. **n8n Node Configuration**
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Operation-aware node configuration guidance.
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**Activates when**: Configuring nodes, understanding property dependencies, setting up AI workflows.
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**Key Features**:
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- Property dependency rules (e.g., sendBody → contentType)
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- Operation-specific requirements
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- AI connection types (8 types for AI Agent workflows)
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- Common configuration patterns
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---
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## 🚀 Installation
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### Prerequisites
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1. **n8n-mcp MCP server** installed and configured ([Installation Guide](https://github.com/romualdczlonkowski/n8n-mcp))
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2. **Claude Code**, Claude.ai, or Claude API access
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3. `.mcp.json` configured with n8n-mcp server
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### Claude Code
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```bash
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# 1. Clone this repository
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git clone https://github.com/czlonkowski/n8n-skills.git
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# 2. Copy skills to your Claude Code skills directory
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cp -r n8n-skills/skills/* ~/.claude/skills/
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# 3. Reload Claude Code
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# Skills will activate automatically
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```
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### Claude.ai
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1. Download individual skill folders from `skills/`
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2. Zip each skill folder
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3. Upload via Settings → Capabilities → Skills
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### API / SDK
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See [docs/INSTALLATION.md](docs/INSTALLATION.md) for detailed instructions.
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---
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## 💡 Usage
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Skills activate **automatically** when relevant queries are detected:
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```
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"How do I write n8n expressions?"
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→ Activates: n8n Expression Syntax
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"Find me a Slack node"
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→ Activates: n8n MCP Tools Expert
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"Build a webhook workflow"
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→ Activates: n8n Workflow Patterns
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"Why is validation failing?"
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→ Activates: n8n Validation Expert
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"How do I configure the HTTP Request node?"
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→ Activates: n8n Node Configuration
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```
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### Skills Work Together
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When you ask: **"Build and validate a webhook to Slack workflow"**
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1. **n8n Workflow Patterns** identifies webhook processing pattern
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2. **n8n MCP Tools Expert** searches for webhook and Slack nodes
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3. **n8n Node Configuration** guides node setup
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4. **n8n Expression Syntax** helps with data mapping
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5. **n8n Validation Expert** validates the final workflow
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All 5 skills compose seamlessly!
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---
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## 📖 Documentation
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- [Installation Guide](docs/INSTALLATION.md) - Detailed installation for all platforms
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- [Usage Guide](docs/USAGE.md) - How to use skills effectively
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- [Development Guide](docs/DEVELOPMENT.md) - Contributing and testing
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- [MCP Testing Log](docs/MCP_TESTING_LOG.md) - Real tool responses used in skills
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---
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## 🔬 Data-Driven Design
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These skills are based on telemetry analysis of:
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- **447,557** MCP tool usage events
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- **31,917** workflows created
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- **19,113** validation errors
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- **15,107** validation feedback loops
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- **2,653** workflow templates
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Key insights:
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- `search_nodes → get_node_essentials` is the most common pattern (9,835 occurrences, 18s avg)
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- `n8n_update_partial_workflow` is the most-used tool (38,287 uses, 99.0% success)
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- Validation loops average 23s thinking, 58s fixing
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- Webhook workflows represent 27.6% of all workflows (813 searches)
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---
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## 🧪 Testing
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Each skill includes 3+ evaluations for quality assurance:
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```bash
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# Run evaluations (if testing framework available)
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npm test
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# Or manually test with Claude
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claude-code --skill n8n-expression-syntax "Test webhook data access"
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```
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---
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## 🤝 Contributing
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Contributions welcome! Please see [DEVELOPMENT.md](docs/DEVELOPMENT.md) for guidelines.
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### Development Approach
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1. **Evaluation-First**: Write test scenarios before implementation
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2. **MCP-Informed**: Test tools, document real responses
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3. **Iterative**: Test against evaluations, iterate until 100% pass
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4. **Concise**: Keep SKILL.md under 500 lines
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5. **Real Examples**: All examples from real templates/tools
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---
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## 📝 License
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MIT License - see [LICENSE](LICENSE) file for details.
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---
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## 🙏 Credits
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**Conceived by Romuald Członkowski**
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- Website: [www.aiadvisors.pl/en](https://www.aiadvisors.pl/en)
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- Part of the [n8n-mcp project](https://github.com/romualdczlonkowski/n8n-mcp)
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---
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## 🔗 Related Projects
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- [n8n-mcp](https://github.com/romualdczlonkowski/n8n-mcp) - MCP server for n8n
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- [n8n](https://n8n.io/) - Workflow automation platform
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---
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## 📊 Repository Stats
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- **5** complementary skills
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- **~3,220** lines of skill content
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- **15-20** evaluation scenarios
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- **88%** documentation coverage (from n8n-mcp)
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- **537** nodes supported
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- **2,653** templates available
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---
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**Ready to build flawless n8n workflows? Get started now!** 🚀
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