Amber 2.0 Beta
Amber 2.0.0-beta.2 is available for evaluation. This is a prerelease: expect
breaking changes and do not treat it as a production-support promise.
The release-gated first-run path is a server-rendered ECR web application created by the standalone Amber CLI. It includes routing, controllers, typed configuration, sessions, static files, tests, and a development watcher without requiring a database.
brew install amberframework/amber_cli/amber_cli
amber new my_app --type web
cd my_app
crystal spec
amber watch
Start with Installation for the platform matrix, checksums, and troubleshooting, then follow the web-app walkthrough.
What is in the framework beta
- MVC controllers and ECR views
- routing, pipelines, constraints, and named routes
- typed request schemas and validation
- memory-backed jobs, sessions, and WebSocket pub/sub
- mailer APIs
- typed YAML configuration with environment-variable overrides
- standalone CLI and diagnostics LSP
What is preview
Persistence/authentication resource generators, Grant integration, Gemma file attachments, the separate asset pipeline, and native-app generation have useful code and documentation, but they are not part of the beta web-app release gate. They may require unpublished or moving dependencies. Preview pages are labeled so new users do not mistake them for the zero-setup path.
See Beta support for the exact platform and generator matrix.
Migrating
Amber V2 removes Kilt and Slang, stops bundling database drivers, adopts typed configuration, and extracts the CLI from the framework repository. Existing apps should follow the migration guide and pin the beta instead of a moving development branch.