# Monorepo overview The [loopback-next](https://github.com/strongloop/loopback-next) repository uses [lerna](https://lernajs.io/) to manage multiple packages for LoopBack 4. | Package | npm | Description | | ----------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [acceptance/repository-cloudant](https://github.com/strongloop/loopback-next/tree/master/acceptance/repository-cloudant) | _(private)_ | Acceptance tests for `@loopback/repository` + `loopback-connector-cloudant` | | [acceptance/repository-mongodb](https://github.com/strongloop/loopback-next/tree/master/acceptance/repository-mongodb) | _(private)_ | Acceptance tests for `@loopback/repository` + `loopback-connector-mongodb` | | [acceptance/repository-mysql](https://github.com/strongloop/loopback-next/tree/master/acceptance/repository-mysql) | _(private)_ | Acceptance tests for `@loopback/repository` + `loopback-connector-mysql` | | [acceptance/repository-postgresql](https://github.com/strongloop/loopback-next/tree/master/acceptance/repository-postgresql) | _(private)_ | Acceptance tests for `@loopback/repository` + `loopback-connector-postgresql` | | [authentication](https://github.com/strongloop/loopback-next/tree/master/packages/authentication) | @loopback/authentication | A component for authentication support | | [booter-lb3app](https://github.com/strongloop/loopback-next/tree/master/packages/booter-lb3app) | @loopback/booter-lb3app | A booter component for LoopBack 3 applications to expose their REST API via LoopBack 4. | | [boot](https://github.com/strongloop/loopback-next/tree/master/packages/boot) | @loopback/boot | Convention based Bootstrapper and Booters | | [build](https://github.com/strongloop/loopback-next/tree/master/packages/build) | @loopback/build | A set of common scripts and default configurations to build LoopBack 4 or other TypeScript modules | | [cli](https://github.com/strongloop/loopback-next/tree/master/packages/cli) | @loopback/cli | CLI for LoopBack 4 | | [context](https://github.com/strongloop/loopback-next/tree/master/packages/context) | @loopback/context | Facilities to manage artifacts and their dependencies in your Node.js applications. The module exposes TypeScript/JavaScript APIs and decorators to register artifacts, declare dependencies, and resolve artifacts by keys. It also serves as an IoC container to support dependency injection. | | [context-explorer](https://github.com/strongloop/loopback-next/tree/master/extension/context-explorer) | @loopback/context-explorer | Visualize context hierarchy, bindings, configurations, and dependencies | | [core](https://github.com/strongloop/loopback-next/tree/master/packages/core) | @loopback/core | Define and implement core constructs such as Application and Component | | [cron](https://github.com/strongloop/loopback-next/tree/master/extensions/cron) | @loopback/cron | Schedule tasks using cron-like syntax | | [docs](https://github.com/strongloop/loopback-next/tree/master/docs) | @loopback/docs | Documentation files rendered at [https://loopback.io](https://loopback.io) | | [eslint-config](https://github.com/strongloop/loopback-next/tree/master/packages/eslint-config) | @loopback/eslint-config | ESLint configuration for LoopBack projects | | [example-access-control-migration](https://github.com/strongloop/loopback-next/tree/master/examples/access-control-migration) | @loopback/example-access-control-migration | An access control example migrated from the LoopBack 3 repository `loopback-example-access-control` | | [example-context](https://github.com/strongloop/loopback-next/tree/master/examples/context) | @loopback/example-context | Standalone examples to illustrate features provided by @loopback/context | | [example-express-composition](https://github.com/strongloop/loopback-next/tree/master/examples/express-composition) | @loopback/example-express-composition | A simple Express application that uses LoopBack 4 REST API | | [example-file-transfer](https://github.com/strongloop/loopback-next/tree/master/examples/file-transfer) | @loopback/example-file-transfer | An example showing how to expose APIs to upload files | | [example-greeter-extension](https://github.com/strongloop/loopback-next/tree/master/examples/greeter-extension) | @loopback/example-greeter-extension | An example showing how to implement the extension point/extension pattern using LoopBack 4 | | [example-hello-world](https://github.com/strongloop/loopback-next/tree/master/examples/hello-world) | @loopback/example-hello-world | A simple hello-world application using LoopBack 4 | | [example-lb3-application](https://github.com/strongloop/loopback-next/tree/master/examples/lb3-application) | @loopback/example-lb3-application | An example LoopBack 3 application mounted in a LoopBack 4 project. | | [example-log-extension](https://github.com/strongloop/loopback-next/tree/master/examples/log-extension) | @loopback/example-log-extension | An example showing how to write a complex log extension for LoopBack 4 | | [example-metrics-prometheus](https://github.com/strongloop/loopback-next/tree/master/examples/metrics-prometheus) | @loopback/example-metrics-prometheus | An example to illustrate metrics provided by @loopback/extension-metrics and Prometheus. | | [example-multi-tenancy](https://github.com/strongloop/loopback-next/tree/master/examples/multi-tenancy) | @loopback/example-multi-tenancy | An example to illustrate how to enable multi-tenancy with LoopBack's IoC and DI container | | [example-rest-crud](https://github.com/strongloop/loopback-next/tree/master/examples/rest-crud) | @loopback/example-rest-crud | An example showing how to use @loopback/rest-crud to define default repository and controller classes | | [example-rpc-server](https://github.com/strongloop/loopback-next/tree/master/examples/rpc-server) | @loopback/example-rpc-server | An example RPC server and application to demonstrate the creation of your own custom server | | [example-soap-calculator](https://github.com/strongloop/loopback-next/tree/master/examples/soap-calculator) | @loopback/example-soap-calculator | A tutorial demonstrating integration with a SOAP webservice | | [example-todo-list](https://github.com/strongloop/loopback-next/tree/master/examples/todo-list) | @loopback/example-todo-list | Continuation of the todo example using relations in LoopBack 4 | | [example-todo](https://github.com/strongloop/loopback-next/tree/master/examples/todo) | @loopback/example-todo | A basic tutorial for getting started with Loopback 4 | | [example-validation-app](https://github.com/strongloop/loopback-next/tree/master/examples/validation-app) | @loopback/example-validation-app | An example demonstrating how to add validation in a LoopBack 4 application | | [extension-health](https://github.com/strongloop/loopback-next/tree/master/extensions/health) | @loopback/extension-health | Expose health check related endpoints | | [extension-logging](https://github.com/strongloop/loopback-next/tree/master/extensions/logging) | @loopback/extension-logging | Add Winston Logger and Fluentd integration | | [extension-metrics](https://github.com/strongloop/loopback-next/tree/master/extensions/metrics) | @loopback/extension-metrics | Report metrics to Prometheus | | [http-caching-proxy](https://github.com/strongloop/loopback-next/tree/master/packages/http-caching-proxy) | @loopback/http-caching-proxy | A caching HTTP proxy for integration tests. NOT SUITABLE FOR PRODUCTION USE! | | [http-server](https://github.com/strongloop/loopback-next/tree/master/packages/http-server) | @loopback/http-server | A wrapper for creating HTTP/HTTPS servers | | [metadata](https://github.com/strongloop/loopback-next/tree/master/packages/metadata) | @loopback/metadata | Utilities to help developers implement TypeScript decorators, define/merge metadata, and inspect metadata | | [model-api-builder](https://github.com/strongloop/loopback-next/tree/master/packages/model-api-builder) | @loopback/model-api-builder | Types and helpers for packages contributing Model API builders. | | [openapi-spec-builder](https://github.com/strongloop/loopback-next/tree/master/packages/openapi-spec-builder) | @loopback/openapi-spec-builder | Builders to create OpenAPI (Swagger) specification documents in tests | | [openapi-v3](https://github.com/strongloop/loopback-next/tree/master/packages/openapi-v3) | @loopback/openapi-v3 | Decorators that annotate LoopBack artifacts with OpenAPI v3 metadata and utilities that transform LoopBack metadata to OpenAPI v3 specifications | | [repository-json-schema](https://github.com/strongloop/loopback-next/tree/master/packages/repository-json-schema) | @loopback/repository-json-schema | Convert a TypeScript class/model to a JSON Schema | | [repository](https://github.com/strongloop/loopback-next/tree/master/packages/repository) | @loopback/repository | Define and implement a common set of interfaces for interacting with databases | | [repository-tests](https://github.com/strongloop/loopback-next/tree/master/packages/repository-tests) | @loopback/repository-tests | A shared test suite to verify `@loopback/repository` functionality with a given compatible connector | | [rest](https://github.com/strongloop/loopback-next/tree/master/packages/rest) | @loopback/rest | Expose controllers as REST endpoints and route REST API requests to controller methods | | [rest-crud](https://github.com/strongloop/loopback-next/tree/master/packages/rest-crud) | @loopback/rest-crud | REST API controller implementing default CRUD semantics | | [service-proxy](https://github.com/strongloop/loopback-next/tree/master/packages/service-proxy) | @loopback/service-proxy | A common set of interfaces for interacting with service oriented backends such as REST APIs, SOAP Web Services, and gRPC microservices | | [testlab](https://github.com/strongloop/loopback-next/tree/master/packages/testlab) | @loopback/testlab | A collection of test utilities we use to write LoopBack tests | | [tsdocs](https://github.com/strongloop/loopback-next/tree/master/packages/tsdocs) | @loopback/tsdocs | An internal package to generate api docs using Microsoft api-extractor and api-documenter | We use npm scripts declared in [package.json](https://github.com/strongloop/loopback-next/blob/master/package.json) to work with the monorepo managed by lerna. See [Developing LoopBack](./DEVELOPING.md) for more details.