@inquirer/core 9.2.1: CancelPromptError

# Notes

## `search_known_solution` Result
`search_known_solution` returned `NO_SAFE_MATCH` for `@inquirer/core.CancelPromptError` in `pkg:npm/%40inquirer/core@9.2.1`.

## What a Model Would Have Written Instead
A model might assume that cancelling a prompt throws a generic `Error` or an `AbortPromptError`, or that `CancelPromptError` accepts custom constructor parameters like `AbortPromptError` (which takes an options object with `cause`).

## How the Wrong Version Fails
`CancelPromptError` in `@inquirer/core` is a dedicated error class inheriting from `Error` with a fixed default message `'Prompt was canceled'` and `name === 'CancelPromptError'`. Calling `.cancel()` on the prompt promise returned by `createPrompt` rejects specifically with `CancelPromptError`, distinguishing intentional prompt cancellation from signal aborts (`AbortPromptError`) or force close exit signals (`ExitPromptError`).

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 @inquirer/core.CancelPromptError in pkg:npm/%40inquirer/core@9.2.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40inquirer/core@9.2.1
Demonstrate these symbols/APIs:
  - @inquirer/core.CancelPromptError

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.

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{
  "name": "verify-inquirer-core-cancelprompterror",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@inquirer/core": "9.2.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @inquirer/core.CancelPromptError in pkg:npm/%40inquirer/core@9.2.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40inquirer/core@9.2.1"
  ],
  "symbols": [
    "@inquirer/core.CancelPromptError"
  ]
}

import assert from 'node:assert/strict';
import { PassThrough } from 'node:stream';
import { CancelPromptError, createPrompt } from '@inquirer/core';

async function testCancelPromptError() {
  // 1. Verify CancelPromptError is an instance of Error with correct name and default message
  const directError = new CancelPromptError();
  assert.equal(directError instanceof Error, true, 'CancelPromptError must inherit from Error');
  assert.equal(directError instanceof CancelPromptError, true, 'CancelPromptError must be an instance of itself');
  assert.equal(directError.name, 'CancelPromptError', 'CancelPromptError name must be CancelPromptError');
  assert.equal(directError.message, 'Prompt was canceled', 'CancelPromptError default message must be "Prompt was canceled"');

  // 2. Verify CancelPromptError thrown when canceling an active prompt created via createPrompt
  const dummyPrompt = createPrompt((_config, _done) => {
    return 'waiting for input...';
  });

  const input = new PassThrough();
  const output = new PassThrough();

  const promptPromise = dummyPrompt({}, { input, output });
  assert.equal(typeof promptPromise.cancel, 'function', 'createPrompt returns a promise with a cancel method');

  promptPromise.cancel();

  await assert.rejects(
    promptPromise,
    (err) => {
      assert.equal(err instanceof CancelPromptError, true, 'Rejected error must be an instance of CancelPromptError');
      assert.equal(err instanceof Error, true, 'Rejected error must inherit from Error');
      assert.equal(err.name, 'CancelPromptError', 'Rejected error name must be CancelPromptError');
      assert.equal(err.message, 'Prompt was canceled', 'Rejected error message must be "Prompt was canceled"');
      return true;
    },
    'Prompt promise must reject with CancelPromptError when canceled'
  );
}

testCancelPromptError().catch((err) => {
  console.error('Contract test failed:', err);
  process.exit(1);
});