@types/node 26.2.0

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/%40types/node@26.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/node@26.2.0

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:sha256:11603929e06cb1eda3e2158b827ff2d8e567a9f65b174c267fe11b176cb33fa3","contract":["package manifest specifies index.d.ts type declarations, TypeScript version, and dependencies","root index.d.ts references essential Node.js module declaration files","declares node:events EventEmitter class, EventEmitterOptions, and EventEmitterEventMap interfaces","declares node:fs functions, Stats, Dirent, and node:fs/promises module","declares node:stream Stream, Readable, Writable, Duplex, and Transform classes","declares node:sqlite DatabaseSyncOptions interface, DatabaseSync class, and StatementSync class","declares node:crypto createHash and randomBytes functions"],"goal":"verify pkg:npm/%40types/node@26.2.0","kind":"HOW","packages":["pkg:npm/%40types/node@26.2.0"],"schemaVersion":1},"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@26.2.0"],"schemaVersion":1,"subject":"pkg:npm/%40types/node@26.2.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-node",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-node",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/node": "26.2.0"
      }
    },
    "node_modules/@types/node": {
      "version": "26.2.0",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.2.0.tgz",
      "integrity": "sha512-5IviulTZeRNp2vAJ514cc/HUlY5nZ9fCbq9DMyC52BrhFZACo3nI0R7qBxhQmo/d27NFe96ur/b7Wwxklda+kg==",
      "license": "MIT",
      "dependencies": {
        "undici-types": "~8.3.0"
      }
    },
    "node_modules/undici-types": {
      "version": "8.3.0",
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-node",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@types/node": "26.2.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40types/node@26.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/node@26.2.0"
  ]
}

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

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

// 1. Resolve @types/node package manifest and verify type declaration entry points
const pkgPath = require.resolve('@types/node/package.json');
const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'));

assert.equal(pkg.name, '@types/node', 'Package name must be @types/node');
assert.equal(pkg.version, '26.2.0', 'Package version must be 26.2.0');
assert.equal(pkg.types, 'index.d.ts', 'Package types entry must point to index.d.ts');
assert.equal(pkg.typeScriptVersion, '5.6', 'TypeScript version must be 5.6');
assert.equal(typeof pkg.dependencies?.['undici-types'], 'string', 'Must depend on undici-types');
assert.ok(pkg.typesVersions?.['<=5.6']?.['*'], 'typesVersions <=5.6 mapping must be present');
assert.ok(pkg.typesVersions?.['<=5.7']?.['*'], 'typesVersions <=5.7 mapping must be present');

const typesDir = path.dirname(pkgPath);
const indexDts = fs.readFileSync(path.join(typesDir, 'index.d.ts'), 'utf8');

// 2. Verify root index.d.ts references essential Node.js module declaration files
assert.ok(indexDts.includes('/// <reference path="globals.d.ts" />'), 'index.d.ts must reference globals.d.ts');
assert.ok(indexDts.includes('/// <reference path="events.d.ts" />'), 'index.d.ts must reference events.d.ts');
assert.ok(indexDts.includes('/// <reference path="fs.d.ts" />'), 'index.d.ts must reference fs.d.ts');
assert.ok(indexDts.includes('/// <reference path="stream.d.ts" />'), 'index.d.ts must reference stream.d.ts');
assert.ok(indexDts.includes('/// <reference path="crypto.d.ts" />'), 'index.d.ts must reference crypto.d.ts');
assert.ok(indexDts.includes('/// <reference path="sqlite.d.ts" />'), 'index.d.ts must reference sqlite.d.ts');

// 3. Verify node:events declarations
const eventsDts = fs.readFileSync(path.join(typesDir, 'events.d.ts'), 'utf8');
assert.ok(eventsDts.includes('declare module "node:events"'), 'events.d.ts must declare module node:events');
assert.ok(eventsDts.includes('class EventEmitter<T extends EventMap<T> = any>'), 'EventEmitter class must be declared');
assert.ok(eventsDts.includes('interface EventEmitterOptions'), 'EventEmitterOptions interface must be declared');
assert.ok(eventsDts.includes('interface EventEmitterEventMap'), 'EventEmitterEventMap interface must be declared');

// 4. Verify node:fs declarations
const fsDts = fs.readFileSync(path.join(typesDir, 'fs.d.ts'), 'utf8');
assert.ok(fsDts.includes('declare module "node:fs"'), 'fs.d.ts must declare module node:fs');
assert.ok(fsDts.includes('interface Stats extends StatsBase<number> {}'), 'fs.d.ts must declare Stats interface');
assert.ok(fsDts.includes('class Dirent<Name extends string | Buffer = string>'), 'fs.d.ts must declare Dirent class');
assert.ok(fsDts.includes('function readFileSync('), 'fs.d.ts must declare readFileSync function overloads');

const fsPromisesDts = fs.readFileSync(path.join(typesDir, 'fs', 'promises.d.ts'), 'utf8');
assert.ok(fsPromisesDts.includes('declare module "node:fs/promises"'), 'fs/promises.d.ts must declare module node:fs/promises');

// 5. Verify node:stream declarations
const streamDts = fs.readFileSync(path.join(typesDir, 'stream.d.ts'), 'utf8');
assert.ok(streamDts.includes('declare module "node:stream"'), 'stream.d.ts must declare module node:stream');
assert.ok(streamDts.includes('class Readable extends Stream'), 'stream.d.ts must declare Readable class');
assert.ok(streamDts.includes('class Writable extends Stream'), 'stream.d.ts must declare Writable class');
assert.ok(streamDts.includes('class Duplex extends Stream'), 'stream.d.ts must declare Duplex class');
assert.ok(streamDts.includes('class Transform extends Duplex'), 'stream.d.ts must declare Transform class');

// 6. Verify node:sqlite declarations
const sqliteDts = fs.readFileSync(path.join(typesDir, 'sqlite.d.ts'), 'utf8');
assert.ok(sqliteDts.includes('declare module "node:sqlite"'), 'sqlite.d.ts must declare module node:sqlite');
assert.ok(sqliteDts.includes('interface DatabaseSyncOptions'), 'sqlite.d.ts must declare DatabaseSyncOptions interface');
assert.ok(sqliteDts.includes('class DatabaseSync implements Disposable'), 'sqlite.d.ts must declare DatabaseSync class');
assert.ok(sqliteDts.includes('class StatementSync'), 'sqlite.d.ts must declare StatementSync class');

// 7. Verify node:crypto declarations
const cryptoDts = fs.readFileSync(path.join(typesDir, 'crypto.d.ts'), 'utf8');
assert.ok(cryptoDts.includes('declare module "node:crypto"'), 'crypto.d.ts must declare module node:crypto');
assert.ok(cryptoDts.includes('function createHash(algorithm: string, options?: HashOptions): Hash;'), 'crypto.d.ts must declare createHash function');
assert.ok(cryptoDts.includes('function randomBytes(size: number): NonSharedBuffer;'), 'crypto.d.ts must declare randomBytes function');

console.log('Contract tests passed successfully.');