e222b9affc
From docs.racket-lang.org/style, added only the non-obvious tips: - Prefer define over let/let* (reduces indentation) - Put provide before require (interface at top) - Use racket/base for libraries (faster loading) - Naming: prefix functions with data type (board-free-spaces) - Use in-list/in-vector explicitly in for loops (performance) - Use module+ test submodules with raco test - Size limits: ~500 lines/module, ~66 lines/function Skipped basic conventions LLMs already know (predicate suffixes, etc).