n8n-表達式語法 是做什麼的？
驗證 n8n 表達式語法並修復常見錯誤。適用於編寫 n8n 表達式、使用 {{}} 語法、存取 $json/$node 變數、排查表達式錯誤、在節點間映射資料，或在工作流程中引用 Webhook 資料時使用。每當配置引用先前節點資料的節點欄位時，都應使用此技能——表達式是 n8n 在節點間傳遞資料的方式，而語法錯誤是最常見的工作流程錯誤來源。當被問及複雜表達式是否會影響效能時，也請使用此技能。
驗證 n8n 表達式語法並修復常見錯誤，適用於編寫 n8n 表達式、使用 {{}} 語法、存取 $json/$node 變數、排查表達式錯誤、在節點間映射資料，或在工作流程中引用 Webhook 資料時使用。
此技能專注於 n8n 工作流程自動化中的表達式語法驗證與錯誤修復。n8n 的表達式（使用 {{}} 語法）是用於在節點之間傳遞資料的核心機制，而語法錯誤是最常見的工作流程錯誤來源。此技能支援驗證表達式是否正確引用來自先前節點的資料（例如透過 $json 或 $node 變數），並能協助排查如引用不存在的屬性或格式錯誤等常見問題。它適用於所有基於 n8n 的平台（包括 n8n.io 雲端版本與自託管版本），並且當使用者詢問複雜表達式是否會影響效能時，此技能也能提供指導。主要優勢在於它能即時捕捉語法錯誤，減少因表達式問題導致的工作流程中斷時間。
npx skills add https://github.com/czlonkowski/n8n-skills/tree/main/skills/n8n-expression-syntaxInstalled? Explore more 生產力與協作 skills: steipete/gemini, steipete/gh-issues, steipete/skill-creator · View all 6 →
驗證 n8n 表達式語法並修復常見錯誤。適用於編寫 n8n 表達式、使用 {{}} 語法、存取 $json/$node 變數、排查表達式錯誤、在節點間映射資料，或在工作流程中引用 Webhook 資料時使用。每當配置引用先前節點資料的節點欄位時，都應使用此技能——表達式是 n8n 在節點間傳遞資料的方式，而語法錯誤是最常見的工作流程錯誤來源。當被問及複雜表達式是否會影響效能時，也請使用此技能。
This repo contains 6 individual skills — each has its own dedicated page.
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.
Write Python code in n8n Code nodes. Use when writing Python in n8n, using _input/_json/_node syntax, working with standard library, or need to understand Python limitations in n8n Code nodes. Use this skill when the user specifically requests Python for an n8n Code node. Note — JavaScript is recommended for 95% of use cases — only use Python when the user explicitly prefers it or the task requires Python-specific standard library capabilities (regex, hashlib, statistics). EXCEPTION — for Python in the AI-agent-callable Custom Code Tool (@n8n/n8n-nodes-langchain.toolCode), use the n8n-code-tool skill instead (input is _query, return must be a string).
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.
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.
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.
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).
Gemini CLI one-shot prompts, summaries, generation, skills, hooks, MCP, or Gemma routing.
Fetch GitHub issues, select candidates, spawn background fix agents, open PRs, and optionally process PR review comments.
Create, edit, audit, tidy, validate, or restructure AgentSkills and SKILL.md files.
Search, install, update, sync, or publish agent skills with the ClawHub CLI and registry.
Delegate coding work to Codex, Claude Code, or OpenCode as background workers; not simple edits or read-only code lookup.
List, configure, authenticate, call, and inspect MCP servers/tools with mcporter over HTTP or stdio.