CodeSampleX

Ejemplo

@anthropic-ai/mcpb 2.1.2: checkManifest, bundleExtension, extractExtension

Muestra verificada para npm @anthropic-ai/mcpb 2.1.2: checkManifest, bundleExtension, extractExtension. El contrato se ejecutó en node 22 · linux debian/x64…

sha256:5bd2d9858d1472c09e5af35abbd80c99700b26ea555d5576062289176942e4e9

Esta red ofrece una sola cosa: una muestra que compila. La ejecutó en un sandbox y guardó el recibo firmado. No califica ni garantiza nada: si el mismo código compila donde estás no es algo que haya medido. Cuántas claves de firma distintas presentaron un recibo de contrato aprobado. Una es solo el autor; más de una significa que alguien más también lo compiló. Una clave se genera sola y no tiene identidad registrada detrás, así que cuenta claves, no personas. 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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Entornos de las ejecuciones de verificación

Entorno Contrato Etapas Ejecución
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…		 2026-09-14

Caso

HOW
Objetivo
verify pkg:npm/%40anthropic-ai/mcpb@2.1.2
Paquetes
Símbolos
  • checkManifest
  • bundleExtension
  • extractExtension
  • validateManifest
  • packExtension
  • unpackExtension
  • MANIFEST_SCHEMAS
Entorno
node 22.23.2
Creado
2026-09-14T23:44:17Z

Contrato

  1. assert MANIFEST_SCHEMAS contains schemas for supported manifest versions
  2. assert validateManifest validates valid manifest structure and rejects invalid manifests
  3. assert packExtension packages an extension directory into an mcpb archive
  4. assert unpackExtension extracts an mcpb archive into target directory

Archivos

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • 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/%40anthropic-ai/mcpb@2.1.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40anthropic-ai/mcpb@2.1.2

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:sha256:028f1f4091bd0053c2fea9ed8bf51cd0eb03544155fde1cbb93cd6a61dfc1508","contract":["assert MANIFEST_SCHEMAS contains schemas for supported manifest versions","assert validateManifest validates valid manifest structure and rejects invalid manifests","assert packExtension packages an extension directory into an mcpb archive","assert unpackExtension extracts an mcpb archive into target directory"],"goal":"verify pkg:npm/%40anthropic-ai/mcpb@2.1.2","kind":"HOW","packages":["pkg:npm/%40anthropic-ai/mcpb@2.1.2"],"schemaVersion":1,"symbols":["checkManifest","bundleExtension","extractExtension","validateManifest","packExtension","unpackExtension","MANIFEST_SCHEMAS"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40anthropic-ai/mcpb@2.1.2"],"schemaVersion":1,"subject":"pkg:npm/%40anthropic-ai/mcpb@2.1.2","symbols":["checkManifest","bundleExtension","extractExtension","validateManifest","packExtension","unpackExtension","MANIFEST_SCHEMAS"],"verifierAdapter":"node-typescript@1"}
index.js
import {
  validateManifest,
  packExtension,
  unpackExtension,
  MANIFEST_SCHEMAS,
  VERSIONED_MANIFEST_SCHEMAS
} from '@anthropic-ai/mcpb';

/**
 * Validates whether an MCP extension manifest conforms to the schema specification.
 *
 * @param {string} manifestPath - File path to manifest.json or directory containing manifest.json
 * @returns {boolean} True if the manifest is valid, false otherwise
 */
export function checkManifest(manifestPath) {
  return validateManifest(manifestPath);
}

/**
 * Packages an extension directory into a .mcpb bundle archive.
 *
 * @param {string} extensionPath - Path to the directory containing extension files and manifest
 * @param {string} outputPath - Target path for the output .mcpb archive file
 * @param {boolean} [silent=true] - Whether to suppress console output
 * @returns {Promise<boolean>} True if packing succeeded
 */
export async function bundleExtension(extensionPath, outputPath, silent = true) {
  return packExtension({ extensionPath, outputPath, silent });
}

/**
 * Extracts an .mcpb bundle archive into a target directory.
 *
 * @param {string} mcpbPath - Path to the .mcpb archive file
 * @param {string} outputDir - Directory to unpack files into
 * @param {boolean} [silent=true] - Whether to suppress console output
 * @returns {Promise<boolean>} True if unpacking succeeded
 */
export async function extractExtension(mcpbPath, outputDir, silent = true) {
  return unpackExtension({ mcpbPath, outputDir, silent });
}

export {
  validateManifest,
  packExtension,
  unpackExtension,
  MANIFEST_SCHEMAS,
  VERSIONED_MANIFEST_SCHEMAS
};
package-lock.json
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  "lockfileVersion": 3,
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      "name": "sample-mcpb",
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      }
    },
    "node_modules/@anthropic-ai/mcpb": {
      "version": "2.1.2",
      "resolved": "https://registry.npmjs.org/@anthropic-ai/mcpb/-/mcpb-2.1.2.tgz",
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      }
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}
package.json
{
  "name": "sample-mcpb",
  "version": "1.0.0",
  "description": "Clean-room sample verifying pkg:npm/@anthropic-ai/mcpb@2.1.2 functionality",
  "type": "module",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "@anthropic-ai/mcpb": "2.1.2"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40anthropic-ai/mcpb@2.1.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40anthropic-ai/mcpb@2.1.2"
  ]
}
test/contract.mjs
import assert from 'node:assert';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import {
  checkManifest,
  bundleExtension,
  extractExtension,
  validateManifest,
  packExtension,
  unpackExtension,
  MANIFEST_SCHEMAS,
  VERSIONED_MANIFEST_SCHEMAS
} from '../index.js';

// 1. MANIFEST_SCHEMAS and VERSIONED_MANIFEST_SCHEMAS provide versioned schemas
assert(typeof MANIFEST_SCHEMAS === 'object' && MANIFEST_SCHEMAS !== null, 'MANIFEST_SCHEMAS must be an object');
assert(MANIFEST_SCHEMAS['0.1'] !== undefined, 'MANIFEST_SCHEMAS must define schema for 0.1');
assert(MANIFEST_SCHEMAS['0.2'] !== undefined, 'MANIFEST_SCHEMAS must define schema for 0.2');
assert(MANIFEST_SCHEMAS['0.3'] !== undefined, 'MANIFEST_SCHEMAS must define schema for 0.3');
assert(MANIFEST_SCHEMAS['0.4'] !== undefined, 'MANIFEST_SCHEMAS must define schema for 0.4');
assert(typeof VERSIONED_MANIFEST_SCHEMAS === 'object' && VERSIONED_MANIFEST_SCHEMAS !== null, 'VERSIONED_MANIFEST_SCHEMAS must be an object');
assert(VERSIONED_MANIFEST_SCHEMAS['0.2'] !== undefined, 'VERSIONED_MANIFEST_SCHEMAS must define schema for 0.2');

// 2. validateManifest verifies valid manifest structure and rejects invalid manifests
const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'contract-mcpb-'));

try {
  const manifestDir = path.join(tempDir, 'manifest-test');
  fs.mkdirSync(manifestDir);

  const validManifest = {
    manifest_version: '0.2',
    name: 'sample-server',
    version: '1.0.0',
    description: 'Sample MCP server for testing',
    author: {
      name: 'Sample Author'
    },
    server: {
      type: 'node',
      entry_point: 'index.js',
      mcp_config: {
        command: 'node',
        args: ['index.js']
      }
    }
  };

  const validManifestPath = path.join(manifestDir, 'manifest.json');
  fs.writeFileSync(validManifestPath, JSON.stringify(validManifest, null, 2));

  const validResult = checkManifest(validManifestPath);
  assert.strictEqual(validResult, true, 'checkManifest should return true for a valid manifest file');

  const validDirResult = validateManifest(manifestDir);
  assert.strictEqual(validDirResult, true, 'validateManifest should accept directory containing manifest.json');

  const invalidManifestPath = path.join(manifestDir, 'invalid-manifest.json');
  fs.writeFileSync(invalidManifestPath, JSON.stringify({ name: 'incomplete' }, null, 2));

  const invalidResult = checkManifest(invalidManifestPath);
  assert.strictEqual(invalidResult, false, 'checkManifest should return false for an invalid manifest');

  // 3. packExtension packages an extension directory into a .mcpb bundle
  const extensionDir = path.join(tempDir, 'extension-source');
  fs.mkdirSync(extensionDir);

  const extManifest = {
    manifest_version: '0.2',
    name: 'sample-pack-extension',
    version: '1.0.0',
    description: 'Sample pack extension',
    author: {
      name: 'Sample Author'
    },
    server: {
      type: 'node',
      entry_point: 'server.js',
      mcp_config: {
        command: 'node',
        args: ['server.js']
      }
    }
  };

  fs.writeFileSync(path.join(extensionDir, 'manifest.json'), JSON.stringify(extManifest, null, 2));
  fs.writeFileSync(path.join(extensionDir, 'server.js'), 'console.log("ready");');

  const bundlePath = path.join(tempDir, 'sample-extension.mcpb');
  const packResult = await bundleExtension(extensionDir, bundlePath, true);
  assert.strictEqual(packResult, true, 'bundleExtension should return true on successful packaging');
  assert.strictEqual(fs.existsSync(bundlePath), true, 'Bundle file should be generated');

  // 4. unpackExtension extracts an .mcpb bundle archive into a target directory
  const unpackTargetDir = path.join(tempDir, 'unpacked-output');
  const unpackResult = await extractExtension(bundlePath, unpackTargetDir, true);
  assert.strictEqual(unpackResult, true, 'extractExtension should return true on successful extraction');

  const unpackedManifestPath = path.join(unpackTargetDir, 'manifest.json');
  const unpackedServerPath = path.join(unpackTargetDir, 'server.js');
  assert.strictEqual(fs.existsSync(unpackedManifestPath), true, 'Unpacked manifest.json should exist');
  assert.strictEqual(fs.existsSync(unpackedServerPath), true, 'Unpacked server.js should exist');

  const unpackedManifestContent = JSON.parse(fs.readFileSync(unpackedManifestPath, 'utf8'));
  assert.strictEqual(unpackedManifestContent.name, 'sample-pack-extension', 'Unpacked manifest name should match');
  assert.strictEqual(fs.readFileSync(unpackedServerPath, 'utf8'), 'console.log("ready");', 'Unpacked server.js content should match');

  console.log('All contract assertions passed successfully.');
} finally {
  fs.rmSync(tempDir, { recursive: true, force: true });
}

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