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.
55
62%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Critical
Do not install without reviewing
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/n8n-workflow-patterns/SKILL.mdSecurity
3 findings — 1 critical severity, 2 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
Suspicious download URL detected (high risk: 0.90). Yes — a Google Drive uc?export=download link can host any file (including executables) from personal accounts and is commonly used to distribute malware or obscure origin, so it should be treated as high risk unless the sender and file are verified.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 0.90). The ai_agent_workflow.md and SKILL.md explicitly instruct connecting ai_tool nodes such as HTTP Request, Serper (web search), Wikipedia, GitHub search, MCP Client and other web/document search tools that fetch untrusted public web content which the AI agent ingests and may act on, creating a clear avenue for indirect prompt injection.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The skill includes an MCP Client Tool example that runs a runtime command via npx (args: ["-y","@modelcontextprotocol/server-filesystem",...]) which will fetch and execute remote code from the npm registry (https://www.npmjs.com/package/@modelcontextprotocol/server-filesystem), so it depends on and executes external code at runtime.
- Repository
- czlonkowski/n8n-skills
- Commit
27e9d0a
- Audited
- Security analysis
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