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N8N Expression Syntax

Checked
shortknife·vlatest·productivity·MIT

This skill teaches you N8N’s expression syntax for building powerful workflows by defining data transformations and logic within your nodes.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add shortknife/n8n-skills --skill n8n-expression-syntax -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

shortknife

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned shortknife/n8n-skills at d9c2872029.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
d9c2872029
Manifest
skills/n8n-expression-syntax/SKILL.md
Scanned
4 files, 1,273 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
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About this skill

What it does

This skill provides access to and understanding of n8n expression syntax. It allows AI agents to construct, validate, and utilize expressions within n8n workflows for data manipulation, conditional logic, and complex operations. The skill enables users to leverage the full power of n8n's automation capabilities through programmatic control.

When to use it

  • Data Transformation: When you need an agent to dynamically transform data fields in an n8n workflow (e.g., formatting dates, extracting values).
  • Conditional Logic: To build workflows that branch based on complex conditions determined by expressions (e.g., routing emails based on customer segment).
  • API Integration: When constructing dynamic API requests or parsing responses using expressions within an n8n workflow.
  • Workflow Debugging: To help troubleshoot and understand existing n8n workflows by explaining the purpose of specific expressions.

Key capabilities

  • Expression generation
  • Syntax validation
  • Explanation of expression functionality
  • Support for common n8n functions

Example prompts

  • "Generate an n8n expression to format a date string in YYYY-MM-DD format."
  • "Explain what this n8n expression does: {{$json.orderTotal > 100 ? "VIP" : "Standard"}}"
  • “Validate the following n8n expression and tell me if it’s correct: {{now() + '7 days'}}”

Tips & gotchas

  • Requires a basic understanding of n8n workflows to effectively utilize this skill.
  • The skill's accuracy depends on the complexity and correctness of the provided expressions.