Ejemplo

@babel/plugin-syntax-json-strings 7.8.3

Muestra verificada para npm @babel/plugin-syntax-json-strings 7.8.3. El contrato se ejecutó en node 22 · linux alpine/x64 · docker y pasó.

sha256:7797f4235f3a9bd8ff212998d52669b7d63ef56f6e46ed8abffd74c352f64462

MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia: Contrato firmado aprobado
Recibos de verificación: 1
Claves de firma que lo compilaron: 1

Entorno declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Entornos de las ejecuciones de verificación

Entorno	Contrato	Etapas	Ejecución
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…	2026-08-27

Caso

HOW

Objetivo: verify pkg:npm/@babel/plugin-syntax-json-strings@7.8.3
Paquetes: @babel/plugin-syntax-json-strings 7.8.3
Creado: 2026-08-27T21:29:38Z

Contrato

Plugin exports a default plugin factory asserting Babel 7 compatibility
Plugin factory returns descriptor named syntax-json-strings with manipulateOptions method
manipulateOptions pushes jsonStrings into parserOpts plugins array
applySyntaxPlugin initializes plugins array if parserOpts.plugins is undefined
applySyntaxPlugin throws when called with invalid plugin instance
configureParserOptions helper initializes plugin and configures parser options in single step
hasJsonStringsPlugin helper accurately detects jsonStrings in parser options

Archivos

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

Descargar el artefacto de código fuente (tar.gz)

Código fuente

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/@babel/plugin-syntax-json-strings@7.8.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-syntax-json-strings@7.8.3

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:sha256:135ef522d7686fd3414e896189bc88466626c906c39aab0ec12d8a382d9c5b24","contract":["Plugin exports a default plugin factory asserting Babel 7 compatibility","Plugin factory returns descriptor named syntax-json-strings with manipulateOptions method","manipulateOptions pushes jsonStrings into parserOpts plugins array","applySyntaxPlugin initializes plugins array if parserOpts.plugins is undefined","applySyntaxPlugin throws when called with invalid plugin instance","configureParserOptions helper initializes plugin and configures parser options in single step","hasJsonStringsPlugin helper accurately detects jsonStrings in parser options"],"goal":"verify pkg:npm/@babel/plugin-syntax-json-strings@7.8.3","kind":"HOW","packages":["pkg:npm/%40babel/plugin-syntax-json-strings@7.8.3"],"schemaVersion":1},"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/plugin-syntax-json-strings@7.8.3"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-syntax-json-strings@7.8.3","verifierAdapter":"node-typescript@1"}

package-lock.json

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package.json

{
  "name": "sample-babel-plugin-syntax-json-strings",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/plugin-syntax-json-strings": "7.8.3"
  }
}

spec.json

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/@babel/plugin-syntax-json-strings@7.8.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-syntax-json-strings@7.8.3"
  ]
}

src/index.mjs

import rawPluginModule from "@babel/plugin-syntax-json-strings";

export const pluginSyntaxJsonStrings =
  typeof rawPluginModule === "function"
    ? rawPluginModule
    : rawPluginModule.default?.default || rawPluginModule.default || rawPluginModule;

/**
 * Instantiate the @babel/plugin-syntax-json-strings plugin with an optional custom API object.
 */
export function createPluginInstance(api = {}, options = {}) {
  const normalizedApi = {
    assertVersion: (range) => {
      if (typeof api.assertVersion === "function") {
        api.assertVersion(range);
      }
    },
    ...api
  };
  return pluginSyntaxJsonStrings(normalizedApi, options);
}

/**
 * Apply the syntax-json-strings plugin to a parser options object.
 */
export function applySyntaxPlugin(pluginInstance, parserOpts = {}) {
  if (!pluginInstance || typeof pluginInstance.manipulateOptions !== "function") {
    throw new Error("Invalid plugin instance: missing manipulateOptions");
  }
  if (!parserOpts.plugins) {
    parserOpts.plugins = [];
  }
  pluginInstance.manipulateOptions({}, parserOpts);
  return parserOpts;
}

/**
 * Configure parser options with @babel/plugin-syntax-json-strings in a single step.
 */
export function configureParserOptions(parserOpts = {}, options = {}, api = {}) {
  const instance = createPluginInstance(api, options);
  return applySyntaxPlugin(instance, parserOpts);
}

/**
 * Check if the jsonStrings plugin is enabled in parser options.
 */
export function hasJsonStringsPlugin(parserOpts = {}) {
  if (!Array.isArray(parserOpts.plugins)) return false;
  return parserOpts.plugins.includes("jsonStrings");
}

test/contract.mjs

import assert from "node:assert/strict";
import rawPluginModule from "@babel/plugin-syntax-json-strings";
import {
  pluginSyntaxJsonStrings,
  createPluginInstance,
  applySyntaxPlugin,
  configureParserOptions,
  hasJsonStringsPlugin
} from "../src/index.mjs";

// Contract 1: Plugin exports a default plugin factory asserting Babel 7 compatibility
{
  assert.equal(typeof pluginSyntaxJsonStrings, "function");

  let assertedVersion = null;
  const api = {
    assertVersion: (v) => {
      assertedVersion = v;
    }
  };
  const instance = pluginSyntaxJsonStrings(api, {});
  assert.equal(assertedVersion, 7);
  assert.ok(instance);

  const failingApi = {
    assertVersion: (v) => {
      throw new Error(`Unsupported Babel version: ${v}`);
    }
  };
  assert.throws(() => pluginSyntaxJsonStrings(failingApi, {}), /Unsupported Babel version: 7/);
}

// Contract 2: Plugin factory returns descriptor named syntax-json-strings with manipulateOptions method
{
  const api = {
    assertVersion: () => {}
  };
  const instance = createPluginInstance(api, {});
  assert.equal(typeof instance, "object");
  assert.equal(instance.name, "syntax-json-strings");
  assert.equal(typeof instance.manipulateOptions, "function");
}

// Contract 3: manipulateOptions pushes jsonStrings into parserOpts plugins array
{
  const instance = createPluginInstance({ assertVersion: () => {} }, {});
  const parserOpts = { plugins: ["jsx"] };

  applySyntaxPlugin(instance, parserOpts);

  assert.ok(parserOpts.plugins.includes("jsx"));
  assert.ok(parserOpts.plugins.includes("jsonStrings"));
  assert.equal(parserOpts.plugins.length, 2);
}

// Contract 4: applySyntaxPlugin initializes plugins array if parserOpts.plugins is undefined
{
  const instance = createPluginInstance({ assertVersion: () => {} }, {});
  const parserOpts = {};

  applySyntaxPlugin(instance, parserOpts);

  assert.ok(Array.isArray(parserOpts.plugins));
  assert.ok(parserOpts.plugins.includes("jsonStrings"));
}

// Contract 5: applySyntaxPlugin throws when called with invalid plugin instance
{
  assert.throws(
    () => applySyntaxPlugin(null, {}),
    /Invalid plugin instance: missing manipulateOptions/
  );
  assert.throws(
    () => applySyntaxPlugin({}, {}),
    /Invalid plugin instance: missing manipulateOptions/
  );
}

// Contract 6: configureParserOptions helper initializes plugin and configures parser options in single step
{
  const parserOpts = { plugins: ["typescript"] };
  const configured = configureParserOptions(
    parserOpts,
    {},
    { assertVersion: () => {} }
  );

  assert.equal(configured, parserOpts);
  assert.ok(configured.plugins.includes("typescript"));
  assert.ok(configured.plugins.includes("jsonStrings"));
}

// Contract 7: hasJsonStringsPlugin helper accurately detects jsonStrings in parser options
{
  assert.equal(hasJsonStringsPlugin({}), false);
  assert.equal(hasJsonStringsPlugin({ plugins: ["jsx"] }), false);
  assert.equal(hasJsonStringsPlugin({ plugins: ["jsonStrings", "jsx"] }), true);
}

console.log("All @babel/plugin-syntax-json-strings contract tests passed successfully.");

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