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 skills add Impertio-Studio/n8n-Claude-Skill-Package --skill n8n-syntax-expressionsgit 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-expressions)<a href="https://agentmods.dev/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-expressions"><img src="https://agentmods.dev/badge/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-expressions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-expressions"><img src="https://agentmods.dev/badge/skills/impertio-studio/n8n-claude-skill-package/n8n-syntax-expressions.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00159 | $0.02377 |
| Opus 5 | $0.00079 | $0.01189 |
| Sonnet 5 | $0.00032 | $0.00475 |
| Haiku 4.5 | $0.00016 | $0.00238 |
Grade A, and why
n8n-syntax-expressions 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 11d 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 — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.
n8n-syntax-expressions
Quick Reference
Expression Syntax
All n8n expressions use double-curly-brace syntax inside node parameter fields:
{{ expression }}
Expressions support standard JavaScript operations plus n8n-specific built-in variables.
Current Node Input
| Variable | Returns | Description |
|---|---|---|
$json |
Object | Shorthand for $input.item.json — current item's JSON data |
$binary |
Object | Shorthand for $input.item.binary — current item's binary data |
$input.item |
Item | The input item currently being processed |
$input.all() |
Array<Item> | All input items from the current node |
$input.first() |
Item | First input item |
$input.last() |
Item | Last input item |
$input.params |
Object | Node configuration settings and operation parameters |
Other Node Output
| Variable | Returns | Description |
|---|---|---|
$("node-name").all() |
Array<Item> | All items from named node output |
$("node-name").first() |
Item | First item from named node |
$("node-name").last() |
Item | Last item from named node |
$("node-name").item |
Item | Linked item via paired items tracking |
$("node-name").itemMatching(index) |
Item | Traces back to matching item (preferred in Code node) |
$("node-name").params |
Object | Query settings/parameters of named node |
$("node-name").context |
Object | Only available with Loop Over Items node |
$("node-name").isExecuted |
Boolean | True if the node has executed |
Workflow & Execution Metadata
| Variable | Returns | Description |
|---|---|---|
$workflow.id |
String | Workflow ID |
$workflow.name |
String | Workflow name |
$workflow.active |
Boolean | Whether workflow is active |
$execution.id |
String | Unique execution ID |
$execution.mode |
String | "test", "production", or "evaluation" |
$execution.resumeUrl |
String | Webhook URL to resume at a Wait node |
$execution.resumeFormUrl |
String | URL for Wait node form |
$execution.customData |
CustomData | Get/set custom execution data |
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.
- 11d ago First seen · 265 lines · 159 tokens per session scan A 275746a154fb
n8n-syntax-expressions is a skill published in the GitHub repository Impertio-Studio/n8n-Claude-Skill-Package (3 stars, last pushed 2mo ago), licensed MIT. It adds 159 tokens to every session and 2,377 once invoked, about $0.0008 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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