Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-code-nodenpx skills add Impertio-Studio/n8n-Claude-Skill-Package --skill n8n-syntax-code-nodegit clone --depth 1 https://github.com/Impertio-Studio/n8n-Claude-Skill-PackageWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-code-node)<a href="https://agentmods.dev/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-code-node"><img src="https://agentmods.dev/badge/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-code-node.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00136 | $0.02184 |
| Opus 5 | $0.00068 | $0.01092 |
| Sonnet 5 | $0.00027 | $0.00437 |
| Haiku 4.5 | $0.00014 | $0.00218 |
Grade A, and why
n8n-syntax-code-node scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
n8n Code Node
Complete reference for the n8n v1.x Code node — JavaScript and Python modes, execution models, available variables, binary data, restrictions, and return format.
Quick Reference
| Aspect | Detail |
|---|---|
| Languages | JavaScript (Node.js) — always available; Python — requires N8N_PYTHON_ENABLED=true (stable v1.111.0+) |
| Default mode | Run Once for All Items |
| Return format | MUST return [{json: {...}}] (all-items) or {json: {...}} (each-item) |
| Environment | Sandboxed — no filesystem, no HTTP, no $itemIndex, no $secrets, no $parameter |
CRITICAL: 5 Restrictions
These restrictions apply to ALL Code node executions. Violating them causes runtime errors.
- NO filesystem access — NEVER use
fs,path, or any file I/O. Use Read/Write Files From Disk nodes instead. - NO HTTP requests — NEVER use
fetch,axios, orhttp. Use the HTTP Request node instead. - NO
$itemIndex— This variable is NOT available in the Code node. Track index manually with a loop counter. - NO
$secrets— External secrets are NOT accessible in Code node. Pass secret values through preceding node output. - NO
$parameter— Node configuration parameters are NOT available. Hardcode values or pass them as input data.
Execution Mode Decision Tree
Need to write Code node logic?
├── Processing items independently (filter, transform, enrich)?
│ └── Use "Run Once for Each Item"
│ ├── JS: access current item via $input.item.json
│ └── Python: access current item via _item["json"]
├── Need to compare/aggregate across ALL items (sort, deduplicate, summarize)?
│ └── Use "Run Once for All Items" (default)
│ ├── JS: access all items via items array
│ └── Python: access all items via _items list
└── Can a native node do this instead (Set, Filter, Sort, Merge)?
└── ALWAYS prefer native nodes — they are faster and maintain item linking
Return Format
Run Once for All Items — MUST Return Array
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 229 lines · 136 tokens per session scan A aef8717680f6
n8n-syntax-code-node is a skill published in the GitHub repository Impertio-Studio/n8n-Claude-Skill-Package (3 stars, last pushed 1mo ago), licensed MIT. It adds 136 tokens to every session and 2,184 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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