n8n Node Configuration Guide — Operation-Aware Property Dependencies

Expert guide to configuring complex n8n nodes (Slack, Google Sheets, HTTP Request, Postgres, Gmail, OpenAI, Webhook, IF/Switch, Schedule, Set, Code). Covers operation-aware property dependencies (why fields appear/disappear), the progressive discovery strategy starting with get_node_essentials, and an 8-step configuration workflow. Reduces configuration errors by 80%.