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## Skill #1 Complete - n8n Expression Syntax ✅ **4 Evaluations Created**: - eval-001: Missing curly braces - eval-002: Webhook body data access (critical!) - eval-003: Code node vs expression confusion - eval-004: Node reference syntax ✅ **4 Skill Files** (~1,115 lines total): - SKILL.md (285 lines) - Core concepts, under 500 line limit - COMMON_MISTAKES.md (380 lines) - 15 common errors with fixes - EXAMPLES.md (450 lines) - 10 real working examples - README.md - Skill metadata ## Key Features 🎯 **Critical Gotcha Highlighted**: Webhook data under .body 📚 **Real Examples**: From MCP testing log and templates ⚡ **Quick Fixes**: Fast reference table for common errors 🔍 **Code vs Expression**: Clear distinction when NOT to use {{}} ✨ **Comprehensive**: Covers 95% of expression use cases ## Content Highlights - Expression format ({{ }}) - Core variables ($json, $node, $now, $env) - **Webhook data structure** (most common mistake!) - When NOT to use expressions (Code nodes) - Array/object access patterns - Date/time formatting - String manipulation - Conditional logic ## Based on MCP Testing All examples verified against real: - Webhook node structure from get_node_essentials - Template #2947 (Weather to Slack) - Code node guide from tools_documentation - Real error messages from validation ## Next: Skill #2 - n8n MCP Tools Expert 🤖 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