OpenL Tablets is a full-featured Business Rules Management System (BRMS) that allows business users to author decision logic in Excel spreadsheets and exposes those rules as REST APIs. The repository is a large multi-module Maven project comprising a core rules engine (DEV), a web-based studio for authoring and managing rules (STUDIO), a rule service runtime for deployment and execution (WSFrontend), and build/utility tooling (Util). The core engine compiles Excel-based rule tables (decision tables, spreadsheets, smart rules, etc.) into Java bytecode, supporting complex validation, constraint solving, and execution with business context attributes (LOB, country, currency, etc.). The WebStudio provides a React frontend with REST APIs for project management, table editing, tracing, debugging, and deployment. The rule service runtime publishes compiled rules as web services with OpenAPI documentation, logging, and security. The system supports multiple repository backends (Git, local files, AWS S3, Azure Blob, JDBC) and authentication modes (form, SAML, OAuth2, personal access tokens). It is a mature, actively maintained platform with extensive test coverage and a large ecosystem of extensions.