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czlonkowski/n8n-code-python

Escribe código Python en nodos Code de n8n. Utilízalo al programar en Python dentro de n8n, usando la sintaxis _input/_json/_node, trabajando con la biblioteca estándar o cuando necesites comprender las limitaciones de Python en nodos Code de n8n.

¿Qué es n8n-code-python?

Esta habilidad está diseñada para guiar a asistentes de IA (como Claude Code, Cursor, Codex, etc.) en la escritura de código Python dentro de los nodos Code de n8n. Su utilidad principal radica en proporcionar las reglas y convenciones específicas del entorno Python de n8n, como el uso de las variables mágicas `_input`, `_json` y `_node` para acceder a los datos de entrada y salida. Además, la habilidad aclara las limitaciones importantes de Python en n8n, como la imposibilidad de usar `print()` (se debe usar `logger`) o los tipos de datos compatibles. Es importante destacar que esta habilidad solo debe activarse cuando el usuario solicite explícitamente Python para un nodo Code, ya que JavaScript es recomendado para el 95% de los casos. Como excepción, si el código Python está destinado a la herramienta "Custom Code Tool" llamable por agentes de IA (@n8n/n8n-nodes-langchain.toolCode), se debe usar la habilidad 'n8n-code-tool' en su lugar. La habilidad proporciona ejemplos concretos de código Python para tareas comunes como procesamiento de cadenas con `re`, hashing con `hashlib`, cálculos estadísticos con `statistics`, y manipulación de JSON y arrays.

Compatible con~Claude Code~Codex CLI~Cursor
Part ofAgent Workflows
npx skills add https://github.com/czlonkowski/n8n-skills/tree/main/skills/n8n-code-python

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Documentación

¿Qué hace n8n-code-python?

Escribe código Python en los nodos Code de n8n. Úsalo al programar en Python en n8n, utilizando la sintaxis _input/_json/_node, trabajando con la biblioteca estándar o cuando necesites comprender las limitaciones de Python en los nodos Code de n8n. Utiliza esta habilidad solo cuando el usuario solicite explícitamente Python para un nodo Code de n8n. Nota: se recomienda JavaScript para el 95% de los casos de uso; solo usa Python cuando el usuario lo prefiera explícitamente o la tarea requiera capacidades específicas de la biblioteca estándar de Python (regex, hashlib, statistics). EXCEPCIÓN: para Python en la herramienta de Código Personalizado invocable por agentes de IA (@n8n/n8n-nodes-langchain.toolCode), usa la habilidad 'n8n-code-tool' en su lugar (la entrada es _query, la devolución debe ser una cadena de texto).

Individual skills in this repo

This repo contains 6 individual skills — each has its own dedicated page.

czlonkowski/n8n-code-javascript

Write JavaScript code in n8n Code nodes. Use when writing JavaScript in n8n, using $input/$json/$node syntax, making HTTP requests with this.helpers / the $helpers global, working with dates using DateTime, troubleshooting Code node errors, choosing between Code node modes, or doing any custom data transformation in n8n. Always use this skill when a workflow needs a Code node — whether for data aggregation, filtering, API calls, format conversion, batch processing logic, or any custom JavaScript. Covers SplitInBatches loop patterns, cross-iteration data, pairedItem, and real-world production patterns. Also use when asked why a Code node or workflow is slow, which execution mode is faster, or how to cut per-item overhead on large datasets. EXCEPTION — for the AI-agent-callable Custom Code Tool (@n8n/n8n-nodes-langchain.toolCode, a tool attached to an AI Agent), use the n8n-code-tool skill instead; it has a different runtime contract.

czlonkowski/n8n-expression-syntax

Validate n8n expression syntax and fix common errors. Use when writing n8n expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors, mapping data between nodes, or referencing webhook data in workflows. Use this skill whenever configuring node fields that reference data from previous nodes — expressions are how n8n passes data between nodes, and getting the syntax wrong is the most common source of workflow errors. Also use when asked whether a complex expression hurts performance.

czlonkowski/n8n-mcp-tools-expert

Expert guide for using n8n-mcp MCP tools effectively. Use when searching for nodes, validating configurations, accessing templates, managing workflows, managing credentials, auditing instance security, or using any n8n-mcp tool. Provides tool selection guidance, parameter formats, and common patterns. IMPORTANT — Always consult this skill before calling any n8n-mcp tool — it prevents common mistakes like wrong nodeType formats, incorrect parameter structures, and inefficient tool usage. If the user mentions n8n, workflows, nodes, or automation and you have n8n MCP tools available, use this skill first.

czlonkowski/n8n-node-configuration

Operation-aware node configuration guidance. Use when configuring nodes, understanding property dependencies, determining required fields, choosing between get_node detail levels, or learning common configuration patterns by node type. Always use this skill when setting up node parameters — it explains which fields are required for each operation, how displayOptions control field visibility, and when to use patchNodeField for surgical edits vs full node updates.

czlonkowski/n8n-validation-expert

Interpret validation errors and guide fixing them. Use when encountering validation errors, validation warnings, false positives, operator structure issues, or need help understanding validation results. Also use when asking about validation profiles, error types, the validation loop process, or auto-fix capabilities. Consult this skill whenever a validate_node or validate_workflow call returns errors or warnings — it knows which warnings are false positives and which errors need real fixes.

czlonkowski/n8n-workflow-patterns

Proven workflow architectural patterns from real n8n workflows. Use when building new workflows, designing workflow structure, choosing workflow patterns, planning workflow architecture, or asking about webhook processing, HTTP API integration, database operations, AI agent workflows, batch processing, or scheduled tasks. Always consult this skill when the user asks to create, build, or design an n8n workflow, automate a process, or connect services — even if they don't explicitly mention 'patterns'. Covers webhook, API, database, AI, batch processing, and scheduled automation architectures. Also use when optimizing a slow workflow or speeding up large-item-count processing (node count, batchSize, all-items vs per-item).

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