CodeSampleX

Sample

vite-node 2.1.9: shouldExternalize

Verified sample for npm vite-node 2.1.9: shouldExternalize. The contract ran on node 22 · linux debian/x64 · docker and passed.

sha256:cacbb12e2746dcd20748ee4b4e21a6b45dc4ddcd0313f162050c0007ce58ad46

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 debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-16

Case

HOW
Goal
verify vite-node.shouldExternalize in pkg:npm/vite-node@2.1.9
Packages
Symbols
  • vite-node.shouldExternalize
Environment
node 22.23.2
Created
2026-09-16T15:18:18Z

Contract

  1. shouldExternalize returns the module identifier for Node.js built-in modules
  2. shouldExternalize returns the specifier for data URLs and network imports
  3. shouldExternalize returns the path when explicitly matched by options.external patterns
  4. shouldExternalize returns false when matched by options.inline patterns
  5. shouldExternalize returns false when the file path is explicitly listed in options.inlineFiles
  6. shouldExternalize returns false for non-library project source files
  7. shouldExternalize caches resolution results when a cache Map is provided

Files

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

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 vite-node.shouldExternalize in pkg:npm/vite-node@2.1.9
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/vite-node@2.1.9
Demonstrate these symbols/APIs:
  - vite-node.shouldExternalize

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
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package-lock.json
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}
package.json
{
  "name": "sample-vite-node-should-externalize",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for vite-node.shouldExternalize",
  "license": "MIT-0",
  "dependencies": {
    "vite-node": "2.1.9"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify vite-node.shouldExternalize in pkg:npm/vite-node@2.1.9",
  "kind": "HOW",
  "packages": [
    "pkg:npm/vite-node@2.1.9"
  ],
  "symbols": [
    "vite-node.shouldExternalize"
  ]
}
test/contract.mjs
import assert from 'node:assert/strict';
import { shouldExternalize } from 'vite-node/server';

async function runContract() {
  // 1. shouldExternalize returns the module identifier for Node.js built-in modules
  const fsResult = await shouldExternalize('node:fs');
  assert.equal(fsResult, 'node:fs', 'Node.js builtin node:fs must be externalized');

  const pathResult = await shouldExternalize('path');
  assert.equal(pathResult, 'path', 'Node.js builtin path must be externalized');

  // 2. shouldExternalize returns the specifier for data URLs and network imports
  const dataUrl = 'data:text/javascript,export const answer = 42;';
  const dataResult = await shouldExternalize(dataUrl);
  assert.equal(dataResult, dataUrl, 'Data URLs must be externalized');

  const httpUrl = 'https://example.com/esm/module.mjs';
  const httpResult = await shouldExternalize(httpUrl);
  assert.equal(httpResult, httpUrl, 'Network imports must be externalized');

  // 3. shouldExternalize returns the path when explicitly matched by options.external patterns
  const externalResult = await shouldExternalize('/workspace/node_modules/sample-external-dep/index.js', {
    external: ['sample-external-dep']
  });
  assert.equal(
    externalResult,
    '/workspace/node_modules/sample-external-dep/index.js',
    'Explicitly externalized dependency must return file path'
  );

  // 4. shouldExternalize returns false when matched by options.inline patterns
  const inlineResult = await shouldExternalize('/workspace/node_modules/sample-inlined-dep/index.js', {
    inline: ['sample-inlined-dep']
  });
  assert.equal(inlineResult, false, 'Explicitly inlined dependency must return false');

  // 5. shouldExternalize returns false when the file path is explicitly listed in options.inlineFiles
  const inlineFile = '/workspace/src/custom-inline.js';
  const inlineFileResult = await shouldExternalize(inlineFile, {
    inlineFiles: [inlineFile]
  });
  assert.equal(inlineFileResult, false, 'Inline files list must return false');

  // 6. shouldExternalize returns false for non-library project source files
  const sourceResult = await shouldExternalize('/workspace/src/app.ts');
  assert.equal(sourceResult, false, 'Project source files outside node_modules must return false');

  // 7. shouldExternalize caches resolution results when a cache Map is provided
  const cache = new Map();
  const cachedResult = await shouldExternalize('node:os', {}, cache);
  assert.equal(cachedResult, 'node:os', 'Cached call should return correct result');
  assert.equal(cache.has('node:os'), true, 'Result promise must be stored in cache map');
  assert.equal(await cache.get('node:os'), 'node:os', 'Cached promise should resolve to result');

  console.log('Contract passed');
}

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

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