npm install express pino pino-http http-errors semver js-yaml minimatch
npm install @verdaccio/types @verdaccio/commons-api
npm install jsonwebtoken bcryptjs handlebars
npm install fastify-plugin # required by node-api
npm install kleur commander # required by cli

No native modules, no iOS/Android linking, no prebuild steps required. Node.js 24 is the minimum required runtime version per upstream documentation.

Project setup

1. Copy the source/ directory into your project, e.g. at ./verdaccio-src/.
2. Add path aliases to tsconfig.json so cross-package imports resolve correctly:

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@verdaccio/api":        ["./verdaccio-src/api/src/index.ts"],
      "@verdaccio/auth":       ["./verdaccio-src/auth/src/index.ts"],
      "@verdaccio/config":     ["./verdaccio-src/config/src/index.ts"],
      "@verdaccio/middleware": ["./verdaccio-src/middleware/src/index.ts"],
      "@verdaccio/store":      ["./verdaccio-src/store/src/index.ts"],
      "@verdaccio/logger":     ["./verdaccio-src/logger/src/index.ts"],
      "@verdaccio/types":      ["./node_modules/@verdaccio/types"]
    },
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "target": "ES2022"
  }
}

3. Set required environment variables before starting:

VERDACCIO_STORAGE_PATH=/var/lib/verdaccio   # where packages are stored
VERDACCIO_PUBLIC_URL=http://localhost:4873   # registry base URL

4. Use the programmatic API from node-api/ (see examples below) or mount the Express router from api/ directly.

Public API

default (api router factory)

import buildApiRouter from '@verdaccio/api';
import type { Auth } from '@verdaccio/auth';
import type { Storage } from '@verdaccio/store';
import type { Config, Logger } from '@verdaccio/types';

function buildApiRouter(
  config: Config,
  auth: Auth,
  storage: Storage,
  logger: Logger
): Router;

Returns a fully-configured Express Router with every npm registry endpoint registered. Mount it under / on your Express app. It registers body parsers, JWT middleware, anti-loop detection, and scope-package encoding automatically.

Auth (auth class)

import { Auth } from '@verdaccio/auth';

class Auth {
  apiJWTmiddleware(): RequestHandler;
  // additional methods for login, token issuance, plugin delegation
}

Central authentication manager. Call auth.apiJWTmiddleware() to get the Express middleware that validates Bearer tokens on every API request. Constructed with a Config and Logger; delegates to whichever auth plugin is configured.

getDefaultConfig (config)

import { getDefaultConfig } from '@verdaccio/config';

function getDefaultConfig(fileName?: string): ConfigYaml;

Parses and returns the bundled default default.yaml configuration object. Use this as a base when constructing a runtime config programmatically; pass the result to ConfigBuilder or directly to Auth/Storage constructors. Accepts an optional alternative YAML filename relative to the conf/ directory.

parseConfigFile (config)

import { parseConfigFile } from '@verdaccio/config';

function parseConfigFile(filePath: string): ConfigYaml;

Reads, parses, and validates a YAML config file from the given absolute path. Use this to load a user-supplied verdaccio.yaml at startup.

Working examples

Scenario - Embedding the registry router in an existing Express app

Mount Verdaccio's full npm API on a sub-path of your existing Express server, reusing your existing HTTP server.

import express from 'express';
import { parseConfigFile } from '@verdaccio/config';
import { Auth } from '@verdaccio/auth';
import { Storage } from '@verdaccio/store';
import buildApiRouter from '@verdaccio/api';
import { createLogger } from '@verdaccio/logger';

const app = express();

const config = parseConfigFile('/etc/verdaccio/config.yaml');
const logger = createLogger({ level: 'info' });
const auth = new Auth(config, logger);
const storage = new Storage(config, logger);

await storage.init(config, []);

const registryRouter = buildApiRouter(config, auth, storage, logger);
app.use('/npm', registryRouter);

app.listen(4873, () => {
  console.log('Registry available at http://localhost:4873/npm');
});

Scenario - Loading configuration programmatically with defaults

Build a runtime config starting from the bundled defaults and override specific fields before passing it to other subsystems.

import { getDefaultConfig, ConfigBuilder } from '@verdaccio/config';

const base = getDefaultConfig(); // loads bundled default.yaml

const config = ConfigBuilder.build({
  ...base,
  storage: '/tmp/verdaccio-storage',
  server: { keepAliveTimeout: 60 },
  uplinks: {
    npmjs: { url: 'https://registry.npmjs.org' }
  },
  packages: {
    '**': {
      access: ['$all'],
      publish: ['$authenticated'],
      proxy: ['npmjs']
    }
  }
});

console.log('Storage path:', config.storage);

Scenario - Validating and resolving a user-supplied config file at CLI startup

Parse a YAML file provided by the user, validate it, then use it to initialise auth and storage.

import path from 'node:path';
import { parseConfigFile, getDefaultConfig } from '@verdaccio/config';
import { Auth } from '@verdaccio/auth';
import { createLogger } from '@verdaccio/logger';

const configPath = path.resolve(process.env.VERDACCIO_CONFIG ?? './verdaccio.yaml');

let rawConfig;
try {
  rawConfig = parseConfigFile(configPath);
} catch {
  console.warn('Config not found, using defaults');
  rawConfig = getDefaultConfig();
}

const logger = createLogger({ level: rawConfig.log?.level ?? 'warn' });
const auth = new Auth(rawConfig, logger);

console.log('Auth plugin loaded from config:', configPath);

File walkthrough

• api/ - Registers Express routes for every npm registry operation; the default export is a Router factory consumed by the top-level server.
• auth/ - Exports the Auth class, auth utility functions, and TypeScript types for auth plugins.
• cli/ - Wires commander commands (init, version, info) and is the entry point for the verdaccio binary.
• config/ - Config file parsing (parseConfigFile), path resolution, ConfigBuilder, security defaults, uplink utilities.
• core/ - Low-level shared utilities (error codes, constants, stream helpers) used by every other package.
• hooks/ - Defines lifecycle hook interfaces that plugins can implement to react to registry events.
• loaders/ - Dynamically requires/imports auth, storage, and middleware plugins resolved from config.
• logger/ - Thin pino wrapper; exports createLogger and log-level utilities.
• middleware/ - Express middleware factories: antiLoop, encodeScopePackage, registerBodyParser, validateName, validatePackage, match.
• node-api/ - Programmatic API to start the full Verdaccio stack without spawning a process.
• plugins/ - Built-in plugin bundles: verdaccio-htpasswd (auth) and verdaccio-local-storage (storage).
• proxy/ - Uplink proxy: fetches tarballs and metadata from upstream registries and caches them locally.
• search/ - Implements the /-/v1/search endpoint search logic across local and proxied packages.
• search-indexer/ - Background worker that builds and updates the local package search index.
• server/ - Creates the http.Server / https.Server, sets timeouts, handles graceful shutdown.
• signature/ - Verifies package provenance signatures per the npm _integrity / Sigstore spec.
• store/ - Storage class: coordinates reads/writes between local storage and upstream proxies.
• tools/ - Internal Vite/build helpers; not intended for import in application code.
• ui-components/ - React components for the Verdaccio web UI; requires a React build pipeline.
• verdaccio/ - Top-level package that assembles all packages into the published verdaccio npm tarball.
• web/ - Express router for the web UI (/-/verdaccio/), serving the SPA and web API endpoints.

Common pitfalls and fixes

• Node.js version below 24: Verdaccio next-9 requires Node.js 24+; running on older versions throws ERR_INVALID_ARG_TYPE inside import.meta.dirname fallbacks — pin your runtime with nvm use 24.
• ESM/CJS interop: The packages use "type": "module" internally; if your project is CJS use tsconfig "module": "NodeNext" and import via dynamic import() rather than require().
• Path alias resolution at runtime: tsconfig paths are compile-time only; at runtime use tsconfig-paths/register or build output with resolved paths via vite build per each package's vite.config.mjs.
• Missing @verdaccio/types peer: Every package imports from @verdaccio/types; this must be installed even if not directly used — omitting it causes silent undefined type errors at runtime.
• __dirname not defined in ESM: Some config helpers fall back to import.meta.dirname; ensure your Node.js version is 22.12+ (or 24+) where import.meta.dirname is stable.
• Storage directory permissions: VERDACCIO_STORAGE_PATH must be writable by the process user; startup silently succeeds but first publish fails with EACCES if permissions are wrong.

Vibe-coding prompt template

I have dropped the Verdaccio monorepo packages into `./verdaccio-src/` inside my project.
I also have USAGE.md in the same directory describing every package and its exports.
The upstream npm package name is `verdaccio` (next-9 / development branch).

Please help me integrate Verdaccio into my existing Node.js/TypeScript/Express project step by step:

1. Read USAGE.md and the file excerpts for `api/src/index.ts`, `auth/src/index.ts`,
   and `config/src/index.ts` to understand the real exported symbols.
2. Add the tsconfig path aliases listed in USAGE.md ## Project setup so TypeScript
   resolves `@verdaccio/*` imports to `./verdaccio-src/*/src/index.ts`.
3. Wire `parseConfigFile` or `getDefaultConfig` from `@verdaccio/config` to load
   my config file at `./verdaccio.yaml`.
4. Instantiate `Auth` from `@verdaccio/auth` and `Storage` from `@verdaccio/store`
   using the parsed config and a logger from `@verdaccio/logger`.
5. Mount the router returned by the default export of `@verdaccio/api` on `/npm`
   of my existing Express app.
6. Show me the final `server.ts` file with all imports, initialisation, and `app.listen`.
7. List any `npm install` commands I still need to run.

Only use exports that actually appear in the source files and USAGE.md. Do not invent APIs.

License and credit

Verdaccio is released under the MIT License (see source/verdaccio/LICENSE or source/api/LICENSE). Source and full documentation are available at https://verdaccio.org and https://github.com/verdaccio/verdaccio. The upstream npm package is verdaccio.

This product’s unique contribution is clean room implementation of valuable code block into AVCP compatible standard.

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