Find the best CLAUDE.md, AGENTS.md and Claude skills

czlonkowskiCLAUDE.md

n8n-mcp

czlonkowski/n8n-mcp/CLAUDE.md

Note: This file is committed to a public OSS repository. Never add sensitive information (API keys, internal URLs, credentials, private infrastructure details) here. n8n-mcp is an MCP (Model Context Protocol) server that gives AI assistants access to n8n node documentation, workflow validation, and workflow management. Documentation and validation tools work offline against a bundled SQLite database of node information; management tools (n8n_*) operate on a live n8n instance when API credentials are configured. Key subsystems of src/ (non-exhaustive — smaller…

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czlonkowskiCLAUDE.md

n8n-skills

czlonkowski/n8n-skills/CLAUDE.md

This is the n8n-skills repository - a collection of Claude Code skills designed to teach AI assistants how to build flawless n8n workflows using the n8n-mcp MCP server. Repository: https://github.com/czlonkowski/n8n-skills Purpose: 14 complementary skills that provide expert guidance on using n8n-mcp MCP tools effectively for building n8n workflows, plus deploying the self-hosted n8n that runs them. Architecture: - n8n-mcp MCP Server: Provides data access (800+ nodes, validation, templates, workflow management) - Claude Skills: Provides expert guidance on HOW to use…

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czlonkowskiSkill

n8n-binary-and-data

czlonkowski/n8n-skills/skills/n8n-binary-and-data/SKILL.md

Handle files and binary data in n8n correctly. Use when working with files, images, PDFs, attachments, uploads or downloads, base64, vision/multimodal input, or when an AI agent needs a file as tool input or output — and whenever the user mentions $binary, binaryPropertyName, "read the PDF", "attach the file", "send the image", Merge losing binary, or a CDN for chat images. Covers the $binary vs $json split, reading/writing binary, keeping binary alive across transforms with Merge, the agent-tool binary boundary, and the CDN/URL requirement for chat surfaces.

czlonkowskiSkill

n8n-code-javascript

czlonkowski/n8n-skills/skills/n8n-code-javascript/SKILL.md

Write, review, or debug JavaScript in an n8n Code node. Use when a Code node is already in the workflow (editing it, fixing an error, choosing its mode, making it faster), or when a new one is justified: no native node fits (check the job-to-node table in using-n8n-mcp-skills first) and the job is on the closed list — loops or recursion no node expresses, state across runs, parsing no node handles, an allowlisted library, heavy all-items work, or one short node replacing 4+ glue nodes. Covers $input/$json/$node in code, this.helpers, Luxon, SplitInBatches loops, cross-iteration data, pairedItem, per-item performance, and the \"Why Code:\" note. Filtering, totals, dedupe, sorting, joins, file formats and API paging have native nodes (Filter, Summarize, Remove Duplicates, Sort, Merge, Extract From File, HTTP Request): see n8n-node-configuration. EXCEPTION — for the AI-agent-callable Custom Code Tool (@n8n/n8n-nodes-langchain.toolCode), use n8n-code-tool; it has a different runtime contract.

czlonkowskiSkill

n8n-code-python

czlonkowski/n8n-skills/skills/n8n-code-python/SKILL.md

Write Python in n8n Code nodes (native Python, `language` pythonNative, n8n 2.x). Use when the user explicitly wants Python in a Code node, when migrating old Pyodide/"Python (Beta)" code that used _input/_json/_node/_now, or when a Python Code node fails with NameError, "Security violations detected", "Import of standard library module … is disallowed", "__build_class__ not found", "A 'json' property isn't a dictionary", or "Python runner unavailable". Covers the only two variables (_items/_item), dict-only access, imports blocked by default, the sandbox's denied builtins, accepted return shapes, and how errors interact with onError. JavaScript is the default for Code nodes — native Python has no n8n helpers and, by default, no imports. 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).

czlonkowskiSkill

n8n-code-tool

czlonkowski/n8n-skills/skills/n8n-code-tool/SKILL.md

Write JavaScript or Python for the n8n Custom Code Tool (@n8n/n8n-nodes-langchain.toolCode) — the AI-agent-callable tool, NOT the workflow Code node. Use when building a Code Tool attached to an AI Agent, writing code that an LLM will invoke, parsing the `query` input, returning a string result, defining an input schema for structured arguments (specifyInputSchema, jsonSchemaExample, DynamicStructuredTool), or troubleshooting errors like \"Wrong output type returned\", \"No execution data available\", \"The response property should be a string, but it is an object\", \"Cannot assign to read only property 'name'\", or an AI agent that refuses to call the tool. Covers the critical differences between Code node and Code Tool: return format (string vs `[{json:{...}}]`), unavailability of `$fromAI`/`$input`/`$helpers` in the Code Tool sandbox, naming rules for AI invocation, and when to use `toolWorkflow`/HTTP Request Tool instead.

czlonkowskiSkill

n8n-error-handling

czlonkowski/n8n-skills/skills/n8n-error-handling/SKILL.md

Wire n8n error handling so failures are loud, structured, and recoverable. Use when building any webhook/API workflow, a scheduled or unattended workflow, or any path where a silent failure would drop user-visible work — and whenever the user mentions error handling, onError, continueErrorOutput, error branches/outputs, retries, retryOnFail, Respond to Webhook status codes, 4xx/5xx, Error Trigger, or "my workflow fails silently". Covers per-node error outputs and wiring, retry/self-healing, error-trigger workflows, and 4xx/5xx response shapes.

czlonkowskiSkill

n8n-multi-instance

czlonkowski/n8n-skills/skills/n8n-multi-instance/SKILL.md

Use when an n8n-mcp account targets more than one n8n instance — i.e. the `n8n_instances` tool is available, the user mentions multiple n8n instances or environments (prod vs staging, several teams or clients), several agents or chats work on one account in parallel, a workflow / datatable / credential / execution call returns an unexpected NOT_FOUND or reads data you don't recognize, or a call is refused with `INSTANCE_AMBIGUOUS` or `INSTANCE_NOT_FOUND`. Covers naming the target instance on each call with the `instance` argument, setting the default with `switch`, verifying the target before high-stakes work — credential writes above all — and recovering from misroutes and fail-closes. Always consult this skill before operating on a specific instance, before any credential create/update/delete on a multi-instance account, or when a call hits the wrong/empty data or an instance error.

czlonkowskiSkill

n8n-workflow-patterns

czlonkowski/n8n-skills/skills/n8n-workflow-patterns/SKILL.md

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).