But what about K?

A detailed walkthrough of ksimple, a minimal K language interpreter written in C. The author reads through the source code (header and implementation files) without relying on the existing comments, explaining macros, memory layout with fat pointers and reference counting, verb/adverb implementations, scalar pervasion, and the character-by-character parsing approach. Along the way, the author spots potential ownership bugs in functions like cnt and At, notes GCC-specific extensions used throughout, and concludes with a FizzBuzz implementation in the language.