Run a "create" command on the CLI and programmatically answer it's prompts. Check out https://github.com/dreamonkey/cli-ghostwriter which has been derived from this example

cli-create.ts

import { spawn } from "node:child_process";

export type SupportedPackageManager = "npm" | "yarn" | "pnpm";

export const ACCEPT_DEFAULT = "ACCEPT_DEFAULT";
export const ENTER_KEY = "\n";
export const WHITESPACE_KEY = " ";
// Octals literals are banned into ESM
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_octal#octal_escape_sequences
export const DOWN_KEY = "\u001b[B";

interface CreateParams {
  packageManager: SupportedPackageManager;
  packageName: string;
  answersMap: Record<string, string | undefined>;
  endingMarker: string;
  enableLogs?: boolean;
}

export function cliCreate({
  packageManager,
  packageName,
  answersMap,
  endingMarker,
  enableLogs,
}: CreateParams) {
  enableLogs = enableLogs ?? false;

  return new Promise<void>((resolve, reject) => {
    const childProcess = spawn(packageManager, ["create", packageName], {
      cwd: process.cwd(),
      stdio: "pipe",
      shell: true,
    });

    childProcess.stdout.setEncoding("utf8");
    childProcess.stdout.on("data", (data: string) => {
      if (data.includes(endingMarker)) {
        childProcess.stdin.end();
      }

      enableLogs && console.log("prompt:", data);

      for (const question in answersMap) {
        if (data.includes(question)) {
          const answer = answersMap[question];
          enableLogs && console.log("answer:", answer);

          // To accept the default value we just need to press enter,
          // so we aren't going to write the answer
          if (!!answer && answer !== ACCEPT_DEFAULT) {
            childProcess.stdin.write(answer);
          }
          childProcess.stdin.write(ENTER_KEY);

          // If we don't remove the question once used, we'd match the line showing
          // the question after it has been answered too, generating erratic behavior
          delete answersMap[question];
          break;
        }
      }
    });

    childProcess.on("exit", (code) => {
      console.log();

      if (code) {
        console.log(` Creation FAILED...`);
        console.log();
        reject();
      } else {
        resolve();
      }
    });
  });
}

index.ts

import { ACCEPT_DEFAULT, cliCreate, DOWN_KEY, WHITESPACE_KEY } from "./cli-create";

// Test this with `create-quasar`

const answersMap: Record<string, string | undefined> = {
  "What would you like to build?": ACCEPT_DEFAULT, // App
  "Project folder": "my-project-folder",
  "Remove existing files and continue?": "y",
  "Pick Quasar version": ACCEPT_DEFAULT, // Qv2
  "Pick script type": DOWN_KEY, // TypeScript
  "Pick Quasar App CLI variant": ACCEPT_DEFAULT, // Webpack
  "Package name": "my-project",
  "Project product name": "My Project",
  "Project description": "",
  Author: ACCEPT_DEFAULT,
  "Pick a Vue component style": DOWN_KEY, // composition-setup
  "Pick your CSS preprocessor": ACCEPT_DEFAULT, // SCSS
  "Check the features needed for your project": `${DOWN_KEY}${WHITESPACE_KEY}${DOWN_KEY}${DOWN_KEY}${WHITESPACE_KEY}`, // checks: ESLint (default), Pinia, Axios
  "Pick an ESLint preset": ACCEPT_DEFAULT, // prettier
  "Install project dependencies?": DOWN_KEY, // No
};


await cliCreate({
  packageManager: "pnpm",
  packageName: "quasar",
  answersMap,
  endingMarker: "Enjoy! - Quasar Team",
});