@babel/core 7.26.10: version

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify @babel/core.version in pkg:npm/%40babel/core@7.26.10
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.26.10
Demonstrate these symbols/APIs:
  - @babel/core.version

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

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{
  "name": "sample-babel-version",
  "version": "1.0.0",
  "description": "verify @babel/core.version in pkg:npm/%40babel/core@7.26.10",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/core": "7.26.10"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify @babel/core.version in pkg:npm/%40babel/core@7.26.10",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.26.10"
  ],
  "symbols": [
    "@babel/core.version"
  ]
}

const babel = require('@babel/core');

/**
 * Returns the version of @babel/core.
 *
 * @returns {string} The version string.
 */
function getBabelVersion() {
  return babel.version;
}

/**
 * Validates whether the @babel/core version follows semver syntax.
 *
 * @returns {boolean} True if semver format matches.
 */
function isValidBabelSemver() {
  const semverPattern = /^\d+\.\d+\.\d+(?:-[\w.]+)?(?:\+[\w.]+)?$/;
  return semverPattern.test(babel.version);
}

module.exports = {
  getBabelVersion,
  isValidBabelSemver,
  version: babel.version
};

const assert = require('assert');
const babel = require('@babel/core');
const { getBabelVersion, isValidBabelSemver } = require('../src/index');

async function main() {
  // 1. version is exposed as a string property on @babel/core
  {
    assert.strictEqual(typeof babel.version, 'string', 'babel.version must be a string');
    assert.strictEqual(typeof getBabelVersion(), 'string', 'getBabelVersion() must return a string');
  }

  // 2. version matches the exact installed package release 7.26.10
  {
    assert.strictEqual(babel.version, '7.26.10', 'babel.version must match 7.26.10');
    assert.strictEqual(getBabelVersion(), '7.26.10', 'helper function must return 7.26.10');
  }

  // 3. version follows semver major.minor.patch numeric format
  {
    const semverPattern = /^\d+\.\d+\.\d+(?:-[\w.]+)?(?:\+[\w.]+)?$/;
    assert(semverPattern.test(babel.version), 'babel.version must be valid semver');
    assert(isValidBabelSemver(), 'isValidBabelSemver() must return true');
    const parts = babel.version.split('.');
    assert.strictEqual(parts[0], '7', 'major version must be 7');
    assert.strictEqual(parts[1], '26', 'minor version must be 26');
    assert.strictEqual(parts[2], '10', 'patch version must be 10');
  }

  // 4. version can be accessed via property lookup and destructuring import
  {
    const { version } = require('@babel/core');
    assert.strictEqual(version, babel.version, 'destructured version must equal babel.version');
    assert.strictEqual(version, '7.26.10', 'destructured version must be 7.26.10');
  }

  // 5. version property is non-empty and starts with 7.
  {
    assert(babel.version.length > 0, 'babel.version must not be empty');
    assert(babel.version.startsWith('7.'), 'babel.version must start with 7.');
  }

  console.log('All contract assertions passed successfully.');
}

main().catch((err) => {
  console.error('Contract failed:', err);
  process.exit(1);
});