The goal of this project is to create a programming environment that is fun and efficient, where you can directly see and interact with the code you are editing.

There are two elements: Circa, a programming language; and Plastic, a cross-platform graphical tool for creating Circa code.

Features of Circa are:

• Live coding. Has a rich API for examining or modifying code at runtime.

• State is preserved across most code changes.

• Supports live code changes made by external tools (such as separate text editors), as well as changes made within the system.

• Code is stored in a (relatively) simple format, allowing for easy introspection and static reasoning.

• Visual programming is supported.

• Compiled code can be unparsed back to text, with all comments and formatting preserved. This allows for a hybrid approach of textual and visual code editing.