Exemplo

@babel/core 7.24.0: version

Amostra verificada para npm @babel/core 7.24.0: version. O contrato rodou em node 22 · linux alpine/x64 · docker e passou: @babel/core exports a non-empty…

sha256:aaba04100f2df0439721450bb231777b20d656debbc0758da2c7ae687675f731

MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência: Contrato assinado aprovado
Recibos de verificação: 1
Chaves de assinatura que o compilaram: 1

Ambiente declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Ambientes das execuções de verificação

Ambiente	Contrato	Etapas	Execução
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…	2026-08-30

Caso

HOW

Objetivo: verify @babel/core.version in pkg:npm/%40babel/core@7.24.0
Pacotes: @babel/core 7.24.0
Símbolos: @babel/core.version
Ambiente: node 22.23.2
Criado: 2026-08-30T15:48:30Z

Contrato

@babel/core exports a non-empty semantic version string matching 7.24.0
getBabelVersion returns the version string identical to @babel/core.version
parseBabelVersion decomposes semver into major 7 minor 24 and patch 0
isMajorVersion returns true for major version 7 and false for other numbers

Arquivos

PROMPT.md
csx.json
package-lock.json
package.json
spec.json
src/index.js
test/contract.js

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

PROMPT.md

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@7.24.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.24.0
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.

csx.json

{"case":{"caseId":"case:sha256:ab321a918e96d67c8ff449ae2c81c5a7d9a4705f8c75dd810060c14ce4d39d2f","contract":["@babel/core exports a non-empty semantic version string matching 7.24.0","getBabelVersion returns the version string identical to @babel/core.version","parseBabelVersion decomposes semver into major 7 minor 24 and patch 0","isMajorVersion returns true for major version 7 and false for other numbers"],"goal":"verify @babel/core.version in pkg:npm/%40babel/core@7.24.0","kind":"HOW","packages":["pkg:npm/%40babel/core@7.24.0"],"schemaVersion":1,"symbols":["@babel/core.version"]},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/core@7.24.0"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.24.0","symbols":["@babel/core.version"],"verifierAdapter":"node-typescript@1"}

package-lock.json

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  "name": "babel-core-sample",
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  "lockfileVersion": 3,
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package.json

{
  "name": "babel-core-sample",
  "version": "1.0.0",
  "dependencies": {
    "@babel/core": "7.24.0"
  }
}

spec.json

{
  "schemaVersion": 1,
  "goal": "verify @babel/core.version in pkg:npm/%40babel/core@7.24.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.24.0"
  ],
  "symbols": [
    "@babel/core.version"
  ]
}

src/index.js

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

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

/**
 * Parses the version string into major, minor, and patch numeric components.
 *
 * @returns {{ major: number, minor: number, patch: number, raw: string }}
 */
function parseBabelVersion() {
  const version = babel.version;
  const match = /^(\d+)\.(\d+)\.(\d+)/.exec(version);
  if (!match) {
    throw new Error(`Invalid semver format for @babel/core version: ${version}`);
  }
  return {
    major: parseInt(match[1], 10),
    minor: parseInt(match[2], 10),
    patch: parseInt(match[3], 10),
    raw: version,
  };
}

/**
 * Checks whether @babel/core version matches the expected major version.
 *
 * @param {number} expectedMajor - Expected major version number.
 * @returns {boolean} True if major version matches, false otherwise.
 */
function isMajorVersion(expectedMajor) {
  const parsed = parseBabelVersion();
  return parsed.major === expectedMajor;
}

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

test/contract.js

const assert = require('node:assert/strict');
const babel = require('@babel/core');
const {
  getBabelVersion,
  parseBabelVersion,
  isMajorVersion,
  version,
} = require('../src/index.js');

async function main() {
  // Contract 1: @babel/core exports a non-empty semantic version string matching 7.24.0
  {
    assert.strictEqual(typeof babel.version, 'string');
    assert.strictEqual(babel.version.length > 0, true);
    assert.strictEqual(babel.version, '7.24.0');
    assert.strictEqual(version, '7.24.0');
  }

  // Contract 2: getBabelVersion returns the version string identical to @babel/core.version
  {
    const ver = getBabelVersion();
    assert.strictEqual(typeof ver, 'string');
    assert.strictEqual(ver, babel.version);
    assert.strictEqual(ver, '7.24.0');
  }

  // Contract 3: parseBabelVersion decomposes semver into major 7 minor 24 and patch 0
  {
    const parsed = parseBabelVersion();
    assert.strictEqual(parsed.major, 7);
    assert.strictEqual(parsed.minor, 24);
    assert.strictEqual(parsed.patch, 0);
    assert.strictEqual(parsed.raw, '7.24.0');
  }

  // Contract 4: isMajorVersion returns true for major version 7 and false for other numbers
  {
    assert.strictEqual(isMajorVersion(7), true);
    assert.strictEqual(isMajorVersion(6), false);
    assert.strictEqual(isMajorVersion(8), false);
  }

  console.log('All pkg:npm/%40babel/core@7.24.0 @babel/core.version contracts passed successfully.');
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});

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