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.
git clone --depth 1 https://github.com/maccman/growth-agentsWrote 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/rules/maccman/growth-agents/typescript)<a href="https://agentmods.dev/rules/maccman/growth-agents/typescript"><img src="https://agentmods.dev/badge/rules/maccman/growth-agents/typescript/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/rules/maccman/growth-agents/typescript"><img src="https://agentmods.dev/badge/rules/maccman/growth-agents/typescript.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 | $0.00655 | $0.00655 |
| Opus 5.5 | $0.00262 | $0.00262 |
| Sonnet 5.5 | $0.00131 | $0.00131 |
| Haiku 4.5 | $0.00065 | $0.00065 |
Grade A, and why
typescript 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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- typescript — 92% identical, 5 lines differ
What it actually says
TypeScript
- TypeScript is available under the
tsxcommand. - Use
pnpm installto install dependencies. - Env vars should be loaded from the
.envfile usingdotenv- make sure you useimport { config } from 'dotenv'to load the env vars.
Use TypeScript when TypeScript standard libraries make it best path forward. For example, PDF processing.
Prefer typescript over python for any task that can be done in typescript.
Suggested packages (TypeScript/Node.js):
- PDF Generation:
pdfkit - PDF extraction:
pdf-parseorpdfjs-dist - Data analysis:
danfojs-node(pandas-like DataFrame for Node.js) - CSV reading/writing:
csv-parse,csv-stringify, orpapaparse - Data visualization:
vegaorvega-lite(for programmatic chart generation), orplotly.jsfor interactive charts - OCR: OCR is currently not supported in Node.js/TypeScript (no reliable, maintained package)
- Table/markdown formatting:
cli-table3for console tables,markdown-tablefor Markdown output - Excel:
exceljs - HTML parsing:
cheerio(jQuery-like HTML parsing for Node.js) - Markdown parsing:
marked - Email sending:
resendornodemailer - Email validation:
email-validator - HTML email templates:
mjml(responsive email framework) - Statistics:
simple-statistics(for A/B test analysis, confidence intervals) - Sitemap parsing:
sitemap-parseror raw XML parsing withfast-xml-parser
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.
- 1mo ago First seen · 32 lines · 655 tokens per session scan A 7050c26be0a1
typescript is a cursor rule published in the GitHub repository maccman/growth-agents (5 stars, last pushed 7mo ago), licensed MIT. It adds 655 tokens to every session, about $0.0026 per session on Opus 5.5. 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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typescript-security
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nextjs-typescript-app-cursorrules-prompt-file
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platform-pattern-2-filesystem-operations
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