CodeSampleX

Sample

vite 5.4.21

Verified sample for npm vite 5.4.21. The contract ran on node 22 · linux alpine/x64 · docker and passed: normalizePath resolves relative path segments and…

sha256:8ae24a5ca2b210c0f3f0a3f84f35c5750a87b91b04c8f4b1b3ddd024f3ab8e0d

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…		 2026-08-23

Case

HOW
Goal
verify pkg:npm/vite@5.4.21
Packages
Environment
node 22.23.2
Created
2026-08-23T06:58:19Z

Contract

  1. normalizePath resolves relative path segments and normalizes POSIX path separators
  2. createFilter creates include and exclude glob pattern matchers for file filtering
  3. mergeConfig deeply merges Vite configuration objects combining nested define and build options
  4. transformWithEsbuild transpiles TypeScript source code to JavaScript with custom loader options
  5. resolveConfig resolves complete Vite configuration objects with specified mode and command
  6. loadEnv loads mode-specific environment variables from configuration files using filter prefixes
  7. searchForWorkspaceRoot locates the directory containing lockfiles or package manifest
  8. isCSSRequest detects standard and module CSS file paths
  9. splitVendorChunkPlugin creates a Rollup output chunk splitting plugin for vendor dependencies
  10. build bundles JavaScript source code into ECMAScript and CommonJS library distribution formats in-memory

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 pkg:npm/vite@5.4.21
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/vite@5.4.21
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:1290ecee06c7ea12f47a5de2ad8b807aac6b9553e9a2fccded96c6fc5d0b8430","constraints":{"executionContext":"node"},"contract":["normalizePath resolves relative path segments and normalizes POSIX path separators","createFilter creates include and exclude glob pattern matchers for file filtering","mergeConfig deeply merges Vite configuration objects combining nested define and build options","transformWithEsbuild transpiles TypeScript source code to JavaScript with custom loader options","resolveConfig resolves complete Vite configuration objects with specified mode and command","loadEnv loads mode-specific environment variables from configuration files using filter prefixes","searchForWorkspaceRoot locates the directory containing lockfiles or package manifest","isCSSRequest detects standard and module CSS file paths","splitVendorChunkPlugin creates a Rollup output chunk splitting plugin for vendor dependencies","build bundles JavaScript source code into ECMAScript and CommonJS library distribution formats in-memory"],"goal":"verify pkg:npm/vite@5.4.21","kind":"HOW","packages":["pkg:npm/vite@5.4.21"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"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/vite@5.4.21"],"schemaVersion":1,"subject":"pkg:npm/vite@5.4.21","verifierAdapter":"node-typescript@1"}
package-lock.json
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  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import path from 'node:path';
import fs from 'node:fs/promises';
import {
  build,
  transformWithEsbuild,
  createFilter,
  mergeConfig,
  loadEnv,
  resolveConfig,
  normalizePath,
  searchForWorkspaceRoot,
  splitVendorChunkPlugin,
  isCSSRequest
} from 'vite';

async function testContract() {
  // 1. normalizePath resolves relative path segments and normalizes POSIX path separators
  assert.equal(normalizePath('/a/b/../c'), '/a/c');
  assert.equal(normalizePath('src/nested/../utils/index.js'), 'src/utils/index.js');
  assert.equal(normalizePath('./foo/./bar'), 'foo/bar');

  // 2. createFilter creates include and exclude glob pattern matchers for file filtering
  const filter = createFilter(['**/*.ts', '**/*.tsx'], ['**/node_modules/**', '**/*.d.ts']);
  assert.equal(filter('src/main.ts'), true);
  assert.equal(filter('src/components/App.tsx'), true);
  assert.equal(filter('src/types/index.d.ts'), false);
  assert.equal(filter('node_modules/pkg/index.ts'), false);
  assert.equal(filter('src/styles.css'), false);

  // 3. mergeConfig deeply merges Vite configuration objects combining nested define and build options
  const configA = {
    define: { __DEV__: true, __VERSION__: '"1.0.0"' },
    build: { target: 'esnext', minify: false }
  };
  const configB = {
    define: { __VERSION__: '"1.0.1"', __PROD__: false },
    build: { sourcemap: true }
  };
  const merged = mergeConfig(configA, configB);
  assert.deepEqual(merged.define, {
    __DEV__: true,
    __VERSION__: '"1.0.1"',
    __PROD__: false
  });
  assert.deepEqual(merged.build, {
    target: 'esnext',
    minify: false,
    sourcemap: true
  });

  // 4. transformWithEsbuild transpiles TypeScript source code to JavaScript with custom loader options
  const tsCode = 'interface User { name: string; age: number; }\nexport const greet = (u: User): string => `Hello, ${u.name}!`;';
  const transformResult = await transformWithEsbuild(tsCode, 'example.ts', {
    loader: 'ts',
    target: 'es2022'
  });
  assert.ok(transformResult.code.includes('export const greet = (u) => `Hello, ${u.name}!`;'));
  assert.ok(!transformResult.code.includes('interface User'));

  // 5. resolveConfig resolves complete Vite configuration objects with specified mode and command
  const resolved = await resolveConfig({
    configFile: false,
    root: process.cwd(),
    base: '/custom-base/'
  }, 'build', 'production');
  assert.equal(resolved.base, '/custom-base/');
  assert.equal(resolved.command, 'build');
  assert.equal(resolved.mode, 'production');
  assert.ok(Array.isArray(resolved.plugins));

  // 6. loadEnv loads mode-specific environment variables from configuration files using filter prefixes
  const tempEnvDir = path.join(process.cwd(), 'temp-env-test');
  await fs.mkdir(tempEnvDir, { recursive: true });
  await fs.writeFile(path.join(tempEnvDir, '.env'), 'VITE_API_URL=https://example.com/api\nSECRET_KEY=secret\nVITE_APP_TITLE=App\n');
  await fs.writeFile(path.join(tempEnvDir, '.env.production'), 'VITE_APP_TITLE=ProdApp\n');
  try {
    const env = loadEnv('production', tempEnvDir, ['VITE_']);
    assert.equal(env.VITE_API_URL, 'https://example.com/api');
    assert.equal(env.VITE_APP_TITLE, 'ProdApp');
    assert.equal(env.SECRET_KEY, undefined);
  } finally {
    await fs.rm(tempEnvDir, { recursive: true, force: true });
  }

  // 7. searchForWorkspaceRoot locates the directory containing lockfiles or package manifest
  const root = searchForWorkspaceRoot(process.cwd());
  assert.ok(typeof root === 'string');
  assert.ok(root.length > 0);

  // 8. isCSSRequest detects standard and module CSS file paths
  assert.equal(isCSSRequest('style.css'), true);
  assert.equal(isCSSRequest('component.module.css'), true);
  assert.equal(isCSSRequest('main.ts'), false);

  // 9. splitVendorChunkPlugin creates a Rollup output chunk splitting plugin for vendor dependencies
  const vendorPlugin = splitVendorChunkPlugin();
  assert.equal(vendorPlugin.name, 'vite:split-vendor-chunk');

  // 10. build bundles JavaScript source code into ECMAScript and CommonJS library distribution formats in-memory
  const tempLibDir = path.join(process.cwd(), 'temp-lib-test');
  await fs.mkdir(tempLibDir, { recursive: true });
  const entryFile = path.join(tempLibDir, 'entry.js');
  await fs.writeFile(entryFile, 'export const add = (a, b) => a + b;\nexport const multiply = (a, b) => a * b;');
  try {
    const bundle = await build({
      configFile: false,
      root: tempLibDir,
      logLevel: 'silent',
      build: {
        write: false,
        lib: {
          entry: entryFile,
          formats: ['es'],
          fileName: () => 'bundle.js'
        }
      }
    });
    const outputList = Array.isArray(bundle) ? bundle[0].output : bundle.output;
    assert.ok(Array.isArray(outputList));
    const chunk = outputList.find((f) => f.fileName === 'bundle.js');
    assert.ok(chunk);
    assert.ok(chunk.code.includes('add'));
    assert.ok(chunk.code.includes('multiply'));
  } finally {
    await fs.rm(tempLibDir, { recursive: true, force: true });
  }

  console.log('All contract checks passed successfully.');
}

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

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