CodeSampleX

Sample

typescript 7.0.2: createToken

Verified sample for npm typescript 7.0.2: createToken. The contract ran on node 22 · linux alpine/x64 · docker and passed: typescript/unstable/ast/factory…

sha256:b5de39a06a98f2a8339753e5a24f7568f648f0eb45fd5602fcd8063cd8160a33

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
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…		 2026-08-28

Case

HOW
Goal
verify typescript.createToken in pkg:npm/typescript@7.0.2
Packages
Symbols
  • typescript.createToken
Environment
node 22.23.2
Created
2026-08-28T07:37:45Z

Contract

  1. typescript/unstable/ast/factory exports createToken function
  2. createToken constructs an AST Token node with specified SyntaxKind
  3. isToken returns true for nodes produced by createToken
  4. tokens created for punctuation kinds match AST token predicates like isPlusToken and isQuestionToken
  5. tokenToString returns corresponding token string representation for created token kinds

Files

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

Download the source artifact (tar.gz)

Source

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 typescript.createToken in pkg:npm/typescript@7.0.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/typescript@7.0.2
Demonstrate these symbols/APIs:
  - typescript.createToken

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:f3e200025709b9c5767c07fdc6a5b9e31244fed41eaafed40ba9d62bed23a155","contract":["typescript/unstable/ast/factory exports createToken function","createToken constructs an AST Token node with specified SyntaxKind","isToken returns true for nodes produced by createToken","tokens created for punctuation kinds match AST token predicates like isPlusToken and isQuestionToken","tokenToString returns corresponding token string representation for created token kinds"],"goal":"verify typescript.createToken in pkg:npm/typescript@7.0.2","kind":"HOW","packages":["pkg:npm/typescript@7.0.2"],"schemaVersion":1,"symbols":["typescript.createToken"]},"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/typescript@7.0.2"],"schemaVersion":1,"subject":"pkg:npm/typescript@7.0.2","symbols":["typescript.createToken"],"verifierAdapter":"node-typescript@1"}
index.js
const { createToken } = require('typescript/unstable/ast/factory');
const {
  SyntaxKind,
  isToken,
  isPlusToken,
  isQuestionToken,
  isColonToken,
  isEqualsGreaterThanToken,
  tokenToString
} = require('typescript/unstable/ast');

/**
 * Creates an AST token node for the specified SyntaxKind.
 *
 * @param {number} kind - The SyntaxKind of the token to create.
 * @returns {object} The created AST Token node.
 */
function buildTokenNode(kind) {
  return createToken(kind);
}

/**
 * Validates that a node is a valid AST token of the expected SyntaxKind.
 *
 * @param {object} node - The AST node to check.
 * @param {number} expectedKind - The expected SyntaxKind.
 * @returns {boolean} True if the node is a token matching expectedKind.
 */
function verifyTokenNode(node, expectedKind) {
  if (!node || typeof node !== 'object') {
    return false;
  }
  if (!isToken(node)) {
    return false;
  }
  return node.kind === expectedKind;
}

module.exports = {
  buildTokenNode,
  verifyTokenNode,
  createToken,
  SyntaxKind,
  isToken,
  isPlusToken,
  isQuestionToken,
  isColonToken,
  isEqualsGreaterThanToken,
  tokenToString
};
package-lock.json
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}
package.json
{
  "name": "sample-typescript-create-token",
  "version": "1.0.0",
  "private": true,
  "description": "verify typescript.createToken in pkg:npm/typescript@7.0.2",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "typescript": "7.0.2"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify typescript.createToken in pkg:npm/typescript@7.0.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/typescript@7.0.2"
  ],
  "symbols": [
    "typescript.createToken"
  ]
}
test/contract.js
const assert = require('node:assert');
const {
  buildTokenNode,
  verifyTokenNode,
  createToken,
  SyntaxKind,
  isToken,
  isPlusToken,
  isQuestionToken,
  isColonToken,
  isEqualsGreaterThanToken,
  tokenToString
} = require('../index.js');

// Proves createToken function is exported and callable
assert.strictEqual(typeof createToken, 'function');

// Proves createToken constructs an AST Token node with specified SyntaxKind
const plusToken = createToken(SyntaxKind.PlusToken);
assert.strictEqual(plusToken.kind, SyntaxKind.PlusToken);
assert.strictEqual(isToken(plusToken), true);
assert.strictEqual(isPlusToken(plusToken), true);
assert.strictEqual(tokenToString(plusToken.kind), '+');

// Proves createToken works for punctuation tokens like QuestionToken
const questionToken = buildTokenNode(SyntaxKind.QuestionToken);
assert.strictEqual(questionToken.kind, SyntaxKind.QuestionToken);
assert.strictEqual(isToken(questionToken), true);
assert.strictEqual(isQuestionToken(questionToken), true);
assert.strictEqual(tokenToString(questionToken.kind), '?');

// Proves createToken works for multi-character tokens like ColonToken and EqualsGreaterThanToken
const colonToken = buildTokenNode(SyntaxKind.ColonToken);
assert.strictEqual(colonToken.kind, SyntaxKind.ColonToken);
assert.strictEqual(isToken(colonToken), true);
assert.strictEqual(isColonToken(colonToken), true);
assert.strictEqual(tokenToString(colonToken.kind), ':');

const arrowToken = createToken(SyntaxKind.EqualsGreaterThanToken);
assert.strictEqual(arrowToken.kind, SyntaxKind.EqualsGreaterThanToken);
assert.strictEqual(isToken(arrowToken), true);
assert.strictEqual(isEqualsGreaterThanToken(arrowToken), true);
assert.strictEqual(tokenToString(arrowToken.kind), '=>');

// Proves verifyTokenNode helper correctly validates token nodes and catches mismatches
assert.strictEqual(verifyTokenNode(plusToken, SyntaxKind.PlusToken), true);
assert.strictEqual(verifyTokenNode(questionToken, SyntaxKind.QuestionToken), true);
assert.strictEqual(verifyTokenNode(plusToken, SyntaxKind.QuestionToken), false);
assert.strictEqual(verifyTokenNode({ kind: SyntaxKind.PlusToken }, SyntaxKind.PlusToken), true);
assert.strictEqual(verifyTokenNode(null, SyntaxKind.PlusToken), false);

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

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