fs

Import:

import { existsSync, readFileSync, writeFileSync } from "node:fs";

Examples:

import { existsSync, readFileSync, writeFileSync } from "node:fs";

export function main(): void {
  const file = "./README.md";

  if (!existsSync(file)) {
    console.log("Missing README.md");
    return;
  }

  const text = readFileSync(file, "utf-8");
  console.log(text);

  writeFileSync("./out.txt", "Hello from Tsonic!");
}

Common patterns also include:

• fs.readFile(...)
• fs.readdir(...)
• fs.mkdir(...)
• fs.mkdirSync(...)

Use node:fs for the normal Node-style authoring model, not @tsonic/nodejs subpaths unless you need an explicit package-root import.