agentmods.dev

typescript-inline-scripts

A guide for running short TypeScript programs with Bun, a JavaScript and TypeScript runtime. It covers files, shell commands, compression, SQLite, native libraries, security utilities, and Node.js-compatible imports.

In plain words
What is it for?
Use it when the user asks to run inline TypeScript, especially for quick scripts that read or write files, execute shell commands, compress data, use SQLite, or call Node.js APIs.
Why use it?
It gives the coding agent a consistent way to run inline TypeScript and use Bun's built-in tools. This avoids guessing how to read files, run commands, or access common services.

Cursor rule

19 7mo ago A scan 32 tokens original MIT
View the source file jahands/prompts
Install

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.

agentmods
npx agentmods add rules/jahands/prompts/typescript-inline-scripts
Clone the repo
git clone --depth 1 https://github.com/jahands/prompts
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 504 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00032 $0.00504
Opus 5 $0.00016 $0.00252
Sonnet 5 $0.00006 $0.00101
Haiku 4.5 $0.00003 $0.00050

Measured 2d ago against content hash 0b90091160fa, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-inline-scripts 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 2d 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.

cursor-rules/typescript-inline-scripts.mdc · 71 lines

What it actually says

console.log(z.coerce.number().parse('5')) EOF )

File System

  • Bun.file(path) - Create file handle for reading/writing
  • await Bun.file(path).text() - Read file as text
  • await Bun.file(path).json() - Read file as JSON
  • await Bun.file(path).arrayBuffer() - Read file as ArrayBuffer
  • await Bun.write(path, data) - Write data to file

Shell Commands

  • import { $ } from "bun" - Shell execution
  • await $command - Execute shell commands with template literals
  • const result = await $ls -la - Capture command output

Compression

  • Bun.gzipSync() - Synchronous gzip compression
  • Bun.gunzipSync() - Synchronous gzip decompression
  • Bun.inflateSync() - Synchronous deflate decompression

SQLite

  • import { Database } from "bun:sqlite"
  • Database operations and SQL execution

FFI (Foreign Function Interface)

  • import { dlopen, CString } from "bun:ffi"
  • Native library interaction

Utilities

  • Bun.escapeHTML() - HTML escaping
  • Bun.hash() - Hashing functions
  • Bun.password.hash() - Password hashing
  • Bun.password.verify() - Password verification

Node.js Compatibility

  • Full Node.js API support via node: imports
  • import { createRequire } from 'node:module'
  • All standard Node.js modules available
Changes

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.

  1. 2d ago First seen · 71 lines · 32 tokens per session scan A 0b90091160fa

Subscribe to this mod's changes

typescript-inline-scripts is a cursor rule published in the GitHub repository jahands/prompts (19 stars, last pushed 7mo ago), licensed MIT. It adds 32 tokens to every session and 504 once invoked, about $0.0002 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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