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/zeenie-ai/opencompany/javascript-skillnpx skills add zeenie-ai/OpenCompany --skill javascript-skillgit clone --depth 1 https://github.com/zeenie-ai/OpenCompanyWrote 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/zeenie-ai/opencompany/javascript-skill)<a href="https://agentmods.dev/skills/zeenie-ai/opencompany/javascript-skill"><img src="https://agentmods.dev/badge/skills/zeenie-ai/opencompany/javascript-skill.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 | $0.00028 | $0.01564 |
| Opus 5 | $0.00014 | $0.00782 |
| Sonnet 5 | $0.00006 | $0.00313 |
| Haiku 4.5 | $0.00003 | $0.00156 |
Grade A, and why
javascript-skill 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 4d 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 — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
JavaScript Code Execution Tool
Execute JavaScript code for calculations, data processing, and JSON manipulation.
How It Works
This skill provides instructions for the JavaScript Executor tool node. Connect the JavaScript Executor node to Zeenie's input-tools handle to enable JavaScript code execution.
javascript_code Tool
Execute JavaScript code and return results.
Schema Fields
| Field | Type | Required | Description |
|---|---|---|---|
| code | string | Yes | JavaScript code to execute |
Available Features
| Feature | Description |
|---|---|
| ES6+ syntax | Arrow functions, destructuring, spread operator |
JSON |
JSON.parse() and JSON.stringify() |
Math |
Mathematical operations |
Date |
Date and time manipulation |
Array methods |
map, filter, reduce, sort, etc. |
Object methods |
keys, values, entries, assign |
String methods |
All standard string methods |
Built-in Variables
| Variable | Description |
|---|---|
input_data |
Data from connected workflow nodes (object) |
output |
Set this to return a result |
Output Methods
- Set
outputvariable: Returns structured data to the workflow - Use
console.log(): Captured as console output
Examples
Basic calculation:
{
"code": "const result = 25 * 4 + 10;\nconsole.log(`Result: ${result}`);\noutput = result;"
}
Array processing:
{
"code": "const numbers = input_data.numbers || [1, 2, 3, 4, 5];\nconst total = numbers.reduce((a, b) => a + b, 0);\nconst average = total / numbers.length;\nconsole.log(`Total: ${total}, Average: ${average}`);\noutput = { total, average };"
}
Filter array:
{
"code": "const numbers = input_data.numbers || [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];\nconst evens = numbers.filter(n => n % 2 === 0);\nconsole.log(`Even numbers: ${evens}`);\noutput = evens;"
}
Transform data:
{
"code": "const users = input_data.users || [{name: 'John', age: 30}, {name: 'Jane', age: 25}];\nconst names = users.map(u => u.name);\nconsole.log(`Names: ${names.join(', ')}`);\noutput = names;"
}
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.
- 4d ago First seen · 196 lines · 28 tokens per session scan A f9d1d9bf9bd0
javascript-skill is a skill published in the GitHub repository zeenie-ai/OpenCompany (848 stars, last pushed yesterday), licensed MIT. It adds 28 tokens to every session and 1,564 once invoked, about $0.0001 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 2026-08-30.
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