CodeSampleX

Sample

@babel/core 7.22.5: loadPartialConfigAsync

Verified sample for npm @babel/core 7.22.5: loadPartialConfigAsync. The contract ran on node 22 · linux debian/x64 · docker and passed.

sha256:9c26e2e1dfdaae584841ae17a7054935d8f59b57fe8852380e2038a5098e11ec

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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…		 2026-09-04

Case

HOW
Goal
verify @babel/core.loadPartialConfigAsync in pkg:npm/%40babel/core@7.22.5
Packages
Symbols
  • @babel/core.loadPartialConfigAsync
Created
2026-09-04T13:48:03Z

Contract

  1. loadPartialConfigAsync returns a Promise resolving to a PartialConfig object containing options and fileHandling
  2. loadPartialConfigAsync merges provided inline configuration options such as sourceMaps and minified
  3. loadPartialConfigAsync resolves to null when the target file matches an ignore pattern
  4. loadPartialConfigAsync rejects with an Error when invalid or unknown options are provided
  5. loadPartialConfigAsync normalizes plugin declarations into ConfigItem objects within options.plugins

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • 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 @babel/core.loadPartialConfigAsync in pkg:npm/%40babel/core@7.22.5
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.22.5
Demonstrate these symbols/APIs:
  - @babel/core.loadPartialConfigAsync

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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  "name": "sample-babel-core-load-partial-config-async",
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  "lockfileVersion": 3,
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      "name": "sample-babel-core-load-partial-config-async",
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package.json
{
  "name": "sample-babel-core-load-partial-config-async",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/core": "7.22.5"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/core.loadPartialConfigAsync in pkg:npm/%40babel/core@7.22.5",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.22.5"
  ],
  "symbols": [
    "@babel/core.loadPartialConfigAsync"
  ]
}
src/index.mjs
import { loadPartialConfigAsync } from "@babel/core";

export async function loadConfigAsync(options = {}) {
  return await loadPartialConfigAsync(options);
}

export async function isConfigIgnored(options = {}) {
  const config = await loadPartialConfigAsync(options);
  return config === null;
}

export async function getResolvedOptions(options = {}) {
  const config = await loadPartialConfigAsync(options);
  return config ? config.options : null;
}
test/contract.mjs
import assert from "node:assert/strict";
import { loadPartialConfigAsync } from "@babel/core";
import {
  loadConfigAsync,
  isConfigIgnored,
  getResolvedOptions
} from "../src/index.mjs";

// Test 1: loadPartialConfigAsync returns a Promise resolving to a PartialConfig object containing options and fileHandling
{
  const configPromise = loadPartialConfigAsync({
    configFile: false,
    babelrc: false
  });
  assert.ok(configPromise instanceof Promise);

  const config = await configPromise;
  assert.ok(config);
  assert.equal(typeof config, "object");
  assert.equal(typeof config.hasFilesystemConfig, "function");
  assert.equal(config.hasFilesystemConfig(), false);
  assert.equal(config.fileHandling, "transpile");
  assert.ok(config.options);
  assert.equal(typeof config.options, "object");
  assert.equal(config.options.configFile, false);
  assert.equal(config.options.babelrc, false);

  const helperResult = await loadConfigAsync({
    configFile: false,
    babelrc: false
  });
  assert.ok(helperResult);
  assert.equal(helperResult.fileHandling, "transpile");
}

// Test 2: loadPartialConfigAsync merges provided inline configuration options such as sourceMaps and minified
{
  const config = await loadPartialConfigAsync({
    configFile: false,
    babelrc: false,
    sourceMaps: true,
    minified: true,
    comments: false
  });
  assert.ok(config);
  assert.equal(config.options.sourceMaps, true);
  assert.equal(config.options.minified, true);
  assert.equal(config.options.comments, false);

  const resolvedOpts = await getResolvedOptions({
    configFile: false,
    babelrc: false,
    sourceMaps: "inline"
  });
  assert.equal(resolvedOpts.sourceMaps, "inline");
}

// Test 3: loadPartialConfigAsync resolves to null when the target file matches an ignore pattern
{
  const result = await loadPartialConfigAsync({
    configFile: false,
    babelrc: false,
    filename: "ignored-module.js",
    ignore: ["ignored-module.js"]
  });
  assert.equal(result, null);

  const isIgnored = await isConfigIgnored({
    configFile: false,
    babelrc: false,
    filename: "ignored-module.js",
    ignore: ["ignored-module.js"]
  });
  assert.equal(isIgnored, true);

  const isNotIgnored = await isConfigIgnored({
    configFile: false,
    babelrc: false,
    filename: "active-module.js",
    ignore: ["ignored-module.js"]
  });
  assert.equal(isNotIgnored, false);
}

// Test 4: loadPartialConfigAsync rejects with an Error when invalid or unknown options are provided
{
  await assert.rejects(
    async () => {
      await loadPartialConfigAsync({
        nonExistentBabelOption: true
      });
    },
    {
      name: "Error",
      message: /Unknown option: \.nonExistentBabelOption/
    }
  );

  await assert.rejects(
    async () => {
      await loadConfigAsync({
        anotherInvalidOption: 123
      });
    },
    {
      name: "Error",
      message: /Unknown option: \.anotherInvalidOption/
    }
  );
}

// Test 5: loadPartialConfigAsync normalizes plugin declarations into ConfigItem objects within options.plugins
{
  const dummyPlugin = () => ({ visitor: {} });
  const config = await loadPartialConfigAsync({
    configFile: false,
    babelrc: false,
    plugins: [dummyPlugin]
  });
  assert.ok(config);
  assert.ok(Array.isArray(config.options.plugins));
  assert.equal(config.options.plugins.length, 1);

  const pluginItem = config.options.plugins[0];
  assert.ok(pluginItem);
  assert.equal(pluginItem.value, dummyPlugin);
}

console.log("All @babel/core.loadPartialConfigAsync contract tests passed successfully.");

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