n8n-expression-syntax

Quick Review

Exceptional skill for n8n expression syntax validation and error correction. The description clearly identifies when to invoke the skill (writing expressions, troubleshooting errors, webhook data access). SKILL.md is remarkably comprehensive with explicit validation rules, common mistake catalogs, and critical webhook data structure guidance. The structure is clean with excellent progressive disclosure - core concepts upfront, advanced patterns later, and references to supplementary files for deeper details. Task knowledge is outstanding with concrete examples, do/don't patterns, and debugging guidance that would enable an agent to both write and fix expressions confidently. Novelty is strong because n8n's expression syntax has non-obvious quirks (webhook .body wrapping, Code node vs expression context, node name quoting) that would require significant trial-and-error or documentation searching without this skill. Minor improvement opportunity: could add a decision tree or flowchart for quick context-switching between expression modes. Overall, this skill would meaningfully reduce token costs and errors for n8n workflow automation tasks.