std-env 3.10.0

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 pkg:npm/std-env@3.10.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/std-env@3.10.0
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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.

{"case":{"caseId":"case:sha256:b782e031ed8972335405f43bf04370546c8e2ead56f33b6026d09e5f37cfb191","constraints":{"executionContext":"node"},"contract":["isNode evaluates to true and runtime evaluates to 'node' under Node.js","runtimeInfo is { name: 'node' } and isBun, isDeno, isWorkerd, isFastly, isNetlify, isEdgeLight evaluate to false","platform reflects process.platform and isLinux, isWindows, isMacOS match the current platform","nodeVersion and nodeMajorVersion match process.versions.node and its parsed major version","hasWindow evaluates to false in Node.js environment","env and process.env provide proxy access to environment variables","provider is a string and providerInfo is an object reflecting environment provider"],"goal":"verify pkg:npm/std-env@3.10.0","kind":"HOW","packages":["pkg:npm/std-env@3.10.0"],"schemaVersion":1},"contractCommand":["node","test/contract.cjs"],"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/std-env@3.10.0"],"schemaVersion":1,"subject":"pkg:npm/std-env@3.10.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-std-env",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-std-env",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "std-env": "3.10.0"
      }
    },
    "node_modules/std-env": {
      "version": "3.10.0",
      "resolved": "https://registry.npmjs.org/std-env/-/std-env-3.10.0.tgz",
      "integrity": "sha512-5GS12FdOZNliM5mAOxFRg7Ir0pWz8MdpYm6AY6VPkGpbA7ZzmbzNcBJQ0GPvvyWgcY7QAhCgf9Uy89I03faLkg==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-std-env",
  "version": "1.0.0",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "std-env": "3.10.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/std-env@3.10.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/std-env@3.10.0"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const assert = require('node:assert/strict');
const {
  isNode,
  runtime,
  runtimeInfo,
  isBun,
  isDeno,
  isWorkerd,
  isFastly,
  isNetlify,
  isEdgeLight,
  platform,
  isLinux,
  isWindows,
  isMacOS,
  nodeVersion,
  nodeMajorVersion,
  env,
  process: stdProcess,
  hasWindow,
  provider,
  providerInfo,
} = require('std-env');

// Runtime detection
assert.strictEqual(isNode, true, 'isNode is true in Node.js');
assert.strictEqual(runtime, 'node', 'runtime evaluates to "node"');
assert.deepStrictEqual(runtimeInfo, { name: 'node' }, 'runtimeInfo is { name: "node" }');
assert.strictEqual(isBun, false, 'isBun is false in Node.js');
assert.strictEqual(isDeno, false, 'isDeno is false in Node.js');
assert.strictEqual(isWorkerd, false, 'isWorkerd is false in Node.js');
assert.strictEqual(isFastly, false, 'isFastly is false in Node.js');
assert.strictEqual(isNetlify, false, 'isNetlify is false in Node.js');
assert.strictEqual(isEdgeLight, false, 'isEdgeLight is false in Node.js');

// Platform detection
assert.strictEqual(platform, process.platform, 'platform matches process.platform');
assert.strictEqual(isLinux, process.platform === 'linux', 'isLinux matches process.platform === "linux"');
assert.strictEqual(isWindows, /^win/i.test(process.platform), 'isWindows matches Windows platform check');
assert.strictEqual(isMacOS, /^darwin/i.test(process.platform), 'isMacOS matches macOS platform check');

// Node.js version info
assert.strictEqual(nodeVersion, process.versions.node, 'nodeVersion matches process.versions.node');
assert.strictEqual(
  nodeMajorVersion,
  Number(process.versions.node.split('.')[0]),
  'nodeMajorVersion matches parsed major version'
);

// Window detection
assert.strictEqual(hasWindow, false, 'hasWindow evaluates to false in Node.js environment');

// Environment proxy
assert.strictEqual(typeof env, 'object', 'env is an object');
assert.strictEqual(typeof stdProcess.env, 'object', 'stdProcess.env is an object');

// Provider info
assert.strictEqual(typeof provider, 'string', 'provider is a string');
assert.strictEqual(typeof providerInfo, 'object', 'providerInfo is an object');