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N8n Code Javascript

czlonkowski/n8n-skills

This one's a lifesaver if you're building n8n workflows that need custom JavaScript logic. It handles the tricky bits like properly accessing webhook data under the `.body` property, returning the correct `[{json: {...}}]` format that trips up most people, and choosing between "Run Once for All Items" versus "Run Once for Each Item" modes. The skill covers real patterns like multi-source data aggregation, batch processing with SplitInBatches, and using built-ins like `$helpers.httpRequest()` and DateTime. Most useful when you need to transform data, make API calls, or do any custom logic that the standard nodes can't handle.

skills.sh installs
7.4K
GitHub stars
6.6K
last updated
Aug 21, 2026
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Install

$ npx -y skills add czlonkowski/n8n-skills --skill n8n-code-javascript --agent claude-code

Installs into .claude/skills of the current project.

Files

JavaScript Code Node

Expert guidance for writing JavaScript code in n8n Code nodes.

Before you write a Code node

A new Code node has to pass this gate first:

SKILL.md on GitHub

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Details

Repository
github.com/czlonkowski/n8n-skills
Categories
Backend & APIs, Documentation, Code Review & Quality, AI & Agent Building, Debugging, Automation & Workflows, Marketing & SEO

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