@types/node 22.20.2: typesVersions

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 @types/node.typesVersions in pkg:npm/%40types/node@22.20.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/node@22.20.2
Demonstrate these symbols/APIs:
  - @types/node.typesVersions

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:sha256:09acd3fc1d679a61903cdb3c6532f684a663c2e841d3e4fc023a23ef0ca43fbd","contract":["@types/node package.json declares typesVersions field mapping \"\u003c=5.6\" paths to \"ts5.6/*\"","@types/node package.json defines typeScriptVersion as \"5.6\"","@types/node ts5.6/index.d.ts references backwards-compatible type declarations for TypeScript 4.9 through 5.6","@types/node ts5.6/buffer.buffer.d.ts declares non-generic Buffer constructor for TypeScript \u003c=5.6 compatibility","@types/node ts5.6/globals.typedarray.d.ts declares non-generic TypedArray and ArrayBufferView types for TypeScript \u003c=5.6","@types/node root index.d.ts notes support for TypeScript 5.7+ with generic Buffer and TypedArray declarations"],"goal":"verify @types/node.typesVersions in pkg:npm/%40types/node@22.20.2","kind":"HOW","packages":["pkg:npm/%40types/node@22.20.2"],"schemaVersion":1,"symbols":["@types/node.typesVersions"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40types/node@22.20.2"],"schemaVersion":1,"subject":"pkg:npm/%40types/node@22.20.2","symbols":["@types/node.typesVersions"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-node-typesversions",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-node-typesversions",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/node": "22.20.2"
      }
    },
    "node_modules/@types/node": {
      "version": "22.20.2",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.20.2.tgz",
      "integrity": "sha512-xlvWf4Vs9n1PEVYwP1n4vvG07M6y8WgvJ2t0vbrWTmijsIHp1cS+uJ2kMIRdY3nHZK0nCYKrPeD171+SzF4/zw==",
      "license": "MIT",
      "dependencies": {
        "undici-types": "~6.21.0"
      }
    },
    "node_modules/undici-types": {
      "version": "6.21.0",
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-node-typesversions",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "@types/node": "22.20.2"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @types/node.typesVersions in pkg:npm/%40types/node@22.20.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/node@22.20.2"
  ],
  "symbols": [
    "@types/node.typesVersions"
  ]
}

import assert from 'node:assert/strict';
import fs from 'node:fs';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);

// 1. @types/node package.json declares typesVersions field mapping "<=5.6" paths to "ts5.6/*"
const pkgJson = require('@types/node/package.json');
assert.equal(pkgJson.name, '@types/node');
assert.equal(pkgJson.version, '22.20.2');
assert.ok(pkgJson.typesVersions, 'typesVersions field must exist');
assert.ok(pkgJson.typesVersions['<=5.6'], 'typesVersions must have entry for <=5.6');
assert.deepEqual(pkgJson.typesVersions['<=5.6']['*'], ['ts5.6/*']);

// 2. @types/node package.json defines typeScriptVersion as "5.6"
assert.equal(pkgJson.typeScriptVersion, '5.6');

// 3. @types/node ts5.6/index.d.ts references backwards-compatible type declarations for TypeScript 4.9 through 5.6
const ts56IndexDtsPath = require.resolve('@types/node/ts5.6/index.d.ts');
assert.ok(fs.existsSync(ts56IndexDtsPath));
const ts56IndexContent = fs.readFileSync(ts56IndexDtsPath, 'utf8');
assert.ok(ts56IndexContent.includes('NOTE: These definitions support Node.js and TypeScript 4.9 through 5.6.'));
assert.ok(ts56IndexContent.includes('/// <reference path="./globals.typedarray.d.ts" />'));
assert.ok(ts56IndexContent.includes('/// <reference path="./buffer.buffer.d.ts" />'));

// 4. @types/node ts5.6/buffer.buffer.d.ts declares non-generic Buffer constructor for TypeScript <=5.6 compatibility
const ts56BufferDtsPath = require.resolve('@types/node/ts5.6/buffer.buffer.d.ts');
assert.ok(fs.existsSync(ts56BufferDtsPath));
const ts56BufferContent = fs.readFileSync(ts56BufferDtsPath, 'utf8');
assert.ok(ts56BufferContent.includes('new(str: string, encoding?: BufferEncoding): Buffer;'));
assert.ok(ts56BufferContent.includes('new(size: number): Buffer;'));

// 5. @types/node ts5.6/globals.typedarray.d.ts declares non-generic TypedArray and ArrayBufferView types for TypeScript <=5.6
const ts56TypedArrayDtsPath = require.resolve('@types/node/ts5.6/globals.typedarray.d.ts');
assert.ok(fs.existsSync(ts56TypedArrayDtsPath));
const ts56TypedArrayContent = fs.readFileSync(ts56TypedArrayDtsPath, 'utf8');
assert.ok(ts56TypedArrayContent.includes('type TypedArray ='));
assert.ok(ts56TypedArrayContent.includes('type ArrayBufferView = TypedArray | DataView;'));

// 6. @types/node root index.d.ts notes support for TypeScript 5.7+ with generic Buffer and TypedArray declarations
const rootIndexDtsPath = require.resolve('@types/node/index.d.ts');
assert.ok(fs.existsSync(rootIndexDtsPath));
const rootIndexContent = fs.readFileSync(rootIndexDtsPath, 'utf8');
assert.ok(rootIndexContent.includes('NOTE: These definitions support Node.js and TypeScript 5.7+.'));
const rootBufferDtsPath = require.resolve('@types/node/buffer.buffer.d.ts');
const rootBufferContent = fs.readFileSync(rootBufferDtsPath, 'utf8');
assert.ok(rootBufferContent.includes('new(str: string, encoding?: BufferEncoding): Buffer<ArrayBuffer>;'));

console.log('All contract tests passed.');