CodeSampleX

Sample

@babel/helper-module-transforms 7.29.7

Verified sample for npm @babel/helper-module-transforms 7.29.7. The contract ran on node 22 · linux alpine/x64 · docker and passed.

sha256:3afd8a2a0bfceb6b0f3ed786c8496821830fa0238021d2138d861893d1808e64

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 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/%40babel/helper-module-transforms@7.29.7
Packages
Created
2026-08-23T06:34:21Z

Contract

  1. getModuleName resolves module names based on options, root configs, and custom getModuleId functions
  2. isSideEffectImport identifies whether import metadata represents an import with no specifiers
  3. hasExports reports whether the module metadata contains export declarations
  4. ensureStatementsHoisted marks statement AST nodes with the _blockHoist metadata property
  5. getDynamicImportSource extracts the source specifier literal from dynamic import call expressions
  6. buildDynamicImport transforms dynamic import AST nodes using a custom transform callback

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 pkg:npm/%40babel/helper-module-transforms@7.29.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/helper-module-transforms@7.29.7

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-babel-helper-module-transforms",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/helper-module-transforms": "7.29.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/helper-module-transforms@7.29.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/helper-module-transforms@7.29.7"
  ]
}
src/index.mjs
import {
  getModuleName,
  isSideEffectImport,
  hasExports,
  ensureStatementsHoisted,
  getDynamicImportSource,
  buildDynamicImport
} from "@babel/helper-module-transforms";

export function resolveModuleName(rootOpts, pluginOpts) {
  return getModuleName(rootOpts, pluginOpts);
}

export function checkIsSideEffect(sourceMetadata) {
  return isSideEffectImport(sourceMetadata);
}

export function checkHasExports(metadata) {
  return hasExports(metadata);
}

export function hoistStatements(statements) {
  ensureStatementsHoisted(statements);
  return statements;
}

export function extractDynamicImportSource(callNode) {
  return getDynamicImportSource(callNode);
}

export function transformDynamicImport(node, deferToThen, wrapWithPromise, builder) {
  return buildDynamicImport(node, deferToThen, wrapWithPromise, builder);
}
test/contract.mjs
import assert from "node:assert/strict";
import {
  getModuleName,
  isSideEffectImport,
  hasExports,
  ensureStatementsHoisted,
  getDynamicImportSource,
  buildDynamicImport
} from "@babel/helper-module-transforms";
import {
  resolveModuleName,
  checkIsSideEffect,
  checkHasExports,
  hoistStatements,
  extractDynamicImportSource,
  transformDynamicImport
} from "../src/index.mjs";

// Test 1: getModuleName resolves module names based on options, root configs, and custom getModuleId functions
{
  assert.equal(getModuleName({}, {}), null);
  assert.equal(resolveModuleName({}, {}), null);

  assert.equal(getModuleName({}, { moduleId: "my-custom-module" }), "my-custom-module");
  assert.equal(resolveModuleName({}, { moduleId: "my-custom-module" }), "my-custom-module");

  assert.equal(
    getModuleName({ filename: "src/components/button.js" }, { moduleIds: true }),
    "src/components/button"
  );
  assert.equal(
    resolveModuleName({ filename: "src/components/button.js" }, { moduleIds: true }),
    "src/components/button"
  );

  assert.equal(
    getModuleName({ filename: "src/components/button.js" }, { moduleIds: true, moduleRoot: "my-pkg" }),
    "my-pkg/src/components/button"
  );

  assert.equal(
    getModuleName(
      { filename: "src/index.js" },
      { moduleIds: true, getModuleId: (name) => `lib/${name}` }
    ),
    "lib/src/index"
  );
}

// Test 2: isSideEffectImport identifies whether import metadata represents an import with no specifiers
{
  const sideEffectSource = {
    imports: new Set(),
    importsNamespace: new Set(),
    reexports: new Map(),
    reexportNamespace: new Set(),
    reexportAll: null
  };
  assert.equal(isSideEffectImport(sideEffectSource), true);
  assert.equal(checkIsSideEffect(sideEffectSource), true);

  const namedImportSource = {
    imports: new Set(["foo"]),
    importsNamespace: new Set(),
    reexports: new Map(),
    reexportNamespace: new Set(),
    reexportAll: null
  };
  assert.equal(isSideEffectImport(namedImportSource), false);
  assert.equal(checkIsSideEffect(namedImportSource), false);
}

// Test 3: hasExports reports whether the module metadata contains export declarations
{
  assert.equal(hasExports({ hasExports: true }), true);
  assert.equal(checkHasExports({ hasExports: true }), true);

  assert.equal(hasExports({ hasExports: false }), false);
  assert.equal(checkHasExports({ hasExports: false }), false);
}

// Test 4: ensureStatementsHoisted marks statement AST nodes with the _blockHoist metadata property
{
  const statements = [
    { type: "ExpressionStatement" },
    { type: "VariableDeclaration" }
  ];
  ensureStatementsHoisted(statements);
  assert.equal(statements[0]._blockHoist, 3);
  assert.equal(statements[1]._blockHoist, 3);

  const newStatements = [{ type: "ReturnStatement" }];
  hoistStatements(newStatements);
  assert.equal(newStatements[0]._blockHoist, 3);
}

// Test 5: getDynamicImportSource extracts the source specifier literal from dynamic import call expressions
{
  const mockImportCall = {
    type: "CallExpression",
    callee: { type: "Import" },
    arguments: [{ type: "StringLiteral", value: "./module.js" }]
  };
  const source = getDynamicImportSource(mockImportCall);
  assert.equal(source.type, "StringLiteral");
  assert.equal(source.value, "./module.js");

  const helperSource = extractDynamicImportSource(mockImportCall);
  assert.equal(helperSource.type, "StringLiteral");
  assert.equal(helperSource.value, "./module.js");
}

// Test 6: buildDynamicImport transforms dynamic import AST nodes using a custom transform callback
{
  const mockImportCall = {
    type: "CallExpression",
    callee: { type: "Import" },
    arguments: [{ type: "StringLiteral", value: "./widget.js" }]
  };

  const transformed = buildDynamicImport(mockImportCall, false, false, (specifier) => ({
    type: "CallExpression",
    callee: { type: "Identifier", name: "require" },
    arguments: [specifier]
  }));

  assert.equal(transformed.type, "CallExpression");
  assert.equal(transformed.callee.name, "require");
  assert.equal(transformed.arguments[0].value, "./widget.js");

  const helperTransformed = transformDynamicImport(mockImportCall, false, false, (specifier) => ({
    type: "CallExpression",
    callee: { type: "Identifier", name: "require" },
    arguments: [specifier]
  }));
  assert.equal(helperTransformed.type, "CallExpression");
  assert.equal(helperTransformed.callee.name, "require");
}

console.log("All @babel/helper-module-transforms contract tests passed successfully.");

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