• Many reliability improvements, including a better test coverage and a brother project testing the koans themselves.
• Adds the second bonus koan series: interfaces and lambdas.

• Adds support for bonus koans.
• Adds the first bonus koan series: arrays and for loops.

For the students:

• more koans on objects
• loop detection
• typos and new precisions in some koans
• koan have now a title
• console feedback improved a lot
• improvements in documentation
• support for Github Codespaces

For contributors:

• migrate to Java 17
• complete overhaul of the engine
• new, simplified and more powerful DSL for designing koans
• better section for mentors in README
• unit test capabilities
• additional koan capabilities: create variables, call methods on objects

• complete koan set
• french and english translation
• complete starting guide
• Java cheat sheet

Support for localization.
First koan on conditions, more methods, decimals, loops, Not 7! game.