CodeSampleX

Exemple

@babel/core 7.26.0: template

Échantillon vérifié pour npm @babel/core 7.26.0: template. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:47f09ef30d04d1bf98cdeb4074ef0aa1bde50196d2bab004aa7610c7cef03b21

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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…		 2026-09-03

Cas

HOW
Objectif
verify template in pkg:npm/%40babel/core@7.26.0
Paquets
Symboles
  • template
Créé
2026-09-03T11:42:46Z

Contrat

  1. template parses JavaScript code templates into AST statements with placeholder substitution
  2. template.ast directly parses source strings and tagged template literals into AST nodes
  3. template.expression creates an AST builder specialized for expressions
  4. template.statements parses code into an array of Statement AST nodes

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code 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 template in pkg:npm/%40babel/core@7.26.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.26.0
Demonstrate these symbols/APIs:
  - template

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:sha256:84fcc01e91577b927106695455e5a4ea17eed752cbe9cad17f84bf0a85161833","contract":["template parses JavaScript code templates into AST statements with placeholder substitution","template.ast directly parses source strings and tagged template literals into AST nodes","template.expression creates an AST builder specialized for expressions","template.statements parses code into an array of Statement AST nodes"],"goal":"verify template in pkg:npm/%40babel/core@7.26.0","kind":"HOW","packages":["pkg:npm/%40babel/core@7.26.0"],"schemaVersion":1,"symbols":["template"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/core@7.26.0"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.26.0","symbols":["template"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-core-template",
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      "license": "Apache-2.0",
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package.json
{
  "name": "sample-babel-core-template",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/core": "7.26.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify template in pkg:npm/%40babel/core@7.26.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.26.0"
  ],
  "symbols": [
    "template"
  ]
}
src/index.mjs
import { template, types } from '@babel/core';

/**
 * Builds a variable declaration AST node from a template string with identifier and value replacements.
 * @param {string} varName - Identifier name for the variable
 * @param {string|number} value - Value to assign
 * @returns {object} AST node representing the variable declaration
 */
export function buildVariableDeclaration(varName, value) {
  const build = template(`const NAME = VALUE;`);
  const valueNode = typeof value === 'number' ? types.numericLiteral(value) : types.stringLiteral(value);
  return build({
    NAME: types.identifier(varName),
    VALUE: valueNode,
  });
}

/**
 * Parses source code directly into an AST node using template.ast.
 * @param {string} code - JavaScript source code
 * @returns {object} AST node
 */
export function parseAst(code) {
  return template.ast(code);
}

/**
 * Creates an expression AST node from a template with placeholder substitution.
 * @param {string} leftId - Identifier on the left
 * @param {number} rightVal - Number on the right
 * @returns {object} BinaryExpression AST node
 */
export function buildBinaryExpression(leftId, rightVal) {
  const buildExpr = template.expression(`LEFT + RIGHT`);
  return buildExpr({
    LEFT: types.identifier(leftId),
    RIGHT: types.numericLiteral(rightVal),
  });
}

/**
 * Parses multiple statements into an array of Statement AST nodes using template.statements.
 * @param {string} code - Code containing statements
 * @returns {object[]} Array of Statement AST nodes
 */
export function parseStatements(code) {
  const buildStmts = template.statements(code);
  return buildStmts();
}

export { template, types };
test/contract.mjs
import assert from 'node:assert/strict';
import {
  template,
  types,
  buildVariableDeclaration,
  parseAst,
  buildBinaryExpression,
  parseStatements,
} from '../src/index.mjs';

// 1. template parses JavaScript code templates into AST statements with placeholder substitution
{
  const decl = buildVariableDeclaration('answer', 42);
  assert.equal(decl.type, 'VariableDeclaration');
  assert.equal(decl.kind, 'const');
  assert.equal(decl.declarations[0].id.name, 'answer');
  assert.equal(decl.declarations[0].init.value, 42);

  const buildRequire = template(`const IMPORT_NAME = require(SOURCE);`);
  const requireAst = buildRequire({
    IMPORT_NAME: types.identifier('myLib'),
    SOURCE: types.stringLiteral('my-lib'),
  });
  assert.equal(requireAst.type, 'VariableDeclaration');
  assert.equal(requireAst.declarations[0].id.name, 'myLib');
  assert.equal(requireAst.declarations[0].init.arguments[0].value, 'my-lib');
}

// 2. template.ast directly parses source strings and tagged template literals into AST nodes
{
  const astFromString = parseAst(`const x = 10;`);
  assert.equal(astFromString.type, 'VariableDeclaration');
  assert.equal(astFromString.declarations[0].id.name, 'x');
  assert.equal(astFromString.declarations[0].init.value, 10);

  const fnAst = template.ast`function ${types.identifier('greet')}(name) { return "hello " + name; }`;
  assert.equal(fnAst.type, 'FunctionDeclaration');
  assert.equal(fnAst.id.name, 'greet');
  assert.equal(fnAst.params[0].name, 'name');
}

// 3. template.expression creates an AST builder specialized for expressions
{
  const exprAst = buildBinaryExpression('counter', 5);
  assert.equal(exprAst.type, 'BinaryExpression');
  assert.equal(exprAst.operator, '+');
  assert.equal(exprAst.left.name, 'counter');
  assert.equal(exprAst.right.value, 5);

  const directExpr = template.expression(`A * B`)({
    A: types.identifier('x'),
    B: types.identifier('y'),
  });
  assert.equal(directExpr.type, 'BinaryExpression');
  assert.equal(directExpr.operator, '*');
  assert.equal(directExpr.left.name, 'x');
  assert.equal(directExpr.right.name, 'y');
}

// 4. template.statements parses code into an array of Statement AST nodes
{
  const stmts = parseStatements(`const a = 1; let b = 2; return a + b;`);
  assert.equal(Array.isArray(stmts), true);
  assert.equal(stmts.length, 3);
  assert.equal(stmts[0].type, 'VariableDeclaration');
  assert.equal(stmts[0].declarations[0].id.name, 'a');
  assert.equal(stmts[1].type, 'VariableDeclaration');
  assert.equal(stmts[1].declarations[0].id.name, 'b');
  assert.equal(stmts[2].type, 'ReturnStatement');
}

console.log('Contract assertions passed.');

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