@cloudflare/workers-types 5.20260917.1

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/%40cloudflare/workers-types@5.20260917.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40cloudflare/workers-types@5.20260917.1

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:sha256:07c4775cc6a65df2fd58987bff9f9dff202c5f9f873e47fb6bfaf72f4cb18069","contract":["@cloudflare/workers-types package.json declares name @cloudflare/workers-types and version 5.20260917.1","@cloudflare/workers-types index.d.ts declares ExecutionContext interface with waitUntil and passThroughOnException methods","@cloudflare/workers-types index.d.ts declares KVNamespace interface with get, put, delete, and list methods","@cloudflare/workers-types index.d.ts declares R2Bucket interface with head, get, put, and delete methods","@cloudflare/workers-types index.d.ts declares D1Database class with prepare, batch, and exec methods","@cloudflare/workers-types experimental/index.d.ts provides typing environment for experimental Cloudflare Workers features"],"goal":"verify pkg:npm/%40cloudflare/workers-types@5.20260917.1","kind":"HOW","packages":["pkg:npm/%40cloudflare/workers-types@5.20260917.1"],"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/%40cloudflare/workers-types@5.20260917.1"],"schemaVersion":1,"subject":"pkg:npm/%40cloudflare/workers-types@5.20260917.1","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-cloudflare-workers-types",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-cloudflare-workers-types",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@cloudflare/workers-types": "5.20260917.1"
      }
    },
    "node_modules/@cloudflare/workers-types": {
      "version": "5.20260917.1",
      "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-5.20260917.1.tgz",
      "integrity": "sha512-fXMYFJw6HmcDiVZ8umPsUB7fR6HjFDms2Xr9iSovYgs1J7ytIfW3s7Rc9RptBH1JZfvdoJMx3Uo729pm/DJuoA==",
      "license": "MIT OR Apache-2.0"
    }
  }
}

{
  "name": "sample-cloudflare-workers-types",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "@cloudflare/workers-types": "5.20260917.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40cloudflare/workers-types@5.20260917.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40cloudflare/workers-types@5.20260917.1"
  ]
}

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

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

// 1. @cloudflare/workers-types package.json declares name @cloudflare/workers-types and version 5.20260917.1
const pkgJson = require('@cloudflare/workers-types/package.json');
assert.equal(pkgJson.name, '@cloudflare/workers-types');
assert.equal(pkgJson.version, '5.20260917.1');

// 2. @cloudflare/workers-types index.d.ts declares ExecutionContext interface with waitUntil and passThroughOnException methods
const indexDtsPath = require.resolve('@cloudflare/workers-types/index.d.ts');
assert.ok(fs.existsSync(indexDtsPath));
const indexDtsContent = fs.readFileSync(indexDtsPath, 'utf8');

assert.ok(indexDtsContent.includes('interface ExecutionContext<Props = unknown> {'));
assert.ok(indexDtsContent.includes('waitUntil(promise: Promise<any>): void;'));
assert.ok(indexDtsContent.includes('passThroughOnException(): void;'));

// 3. @cloudflare/workers-types index.d.ts declares KVNamespace interface with get, put, delete, and list methods
assert.ok(indexDtsContent.includes('interface KVNamespace<Key extends string = string> {'));
assert.ok(indexDtsContent.includes('get(key: Key, type: "text"): Promise<string | null>;'));
assert.ok(indexDtsContent.includes('delete(key: Key): Promise<void>;'));
assert.ok(indexDtsContent.includes('list<Metadata = unknown>('));

// 4. @cloudflare/workers-types index.d.ts declares R2Bucket interface with head, get, put, and delete methods
assert.ok(indexDtsContent.includes('interface R2Bucket {'));
assert.ok(indexDtsContent.includes('head(key: string): Promise<R2Object | null>;'));
assert.ok(indexDtsContent.includes('delete(keys: string | string[]): Promise<void>;'));

// 5. @cloudflare/workers-types index.d.ts declares D1Database class with prepare, batch, and exec methods
assert.ok(indexDtsContent.includes('declare abstract class D1Database {'));
assert.ok(indexDtsContent.includes('prepare(query: string): D1PreparedStatement;'));
assert.ok(indexDtsContent.includes('batch<T = unknown>(statements: D1PreparedStatement[]): Promise<D1Result<T>[]>;'));
assert.ok(indexDtsContent.includes('exec(query: string): Promise<D1ExecResult>;'));

// 6. @cloudflare/workers-types experimental/index.d.ts provides typing environment for experimental Cloudflare Workers features
const expDtsPath = require.resolve('@cloudflare/workers-types/experimental/index.d.ts');
assert.ok(fs.existsSync(expDtsPath));
const expDtsContent = fs.readFileSync(expDtsPath, 'utf8');
assert.ok(expDtsContent.includes('declare class DOMException extends Error {'));
assert.ok(expDtsContent.includes('interface ExecutionContext<Props = unknown> {'));

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