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The n8n Expression Syntax skill provides Claude with deep knowledge of n8n's expression language, enabling it to write, validate, and debug complex data transformations within workflows. It helps users navigate common pitfalls such as the nested structure of webhook data, case-sensitivity in node references, and the specific syntax requirements for $json and $node variables. This skill is essential for developers looking to eliminate 'undefined' errors and ensure their automation logic performs correctly across various node types, including HTTP requests and custom Code nodes.
