Labs

Each lab is one frontend problem taken end to end — the brief, an interactive solution, and a walkthrough of how it was built.

• 01Grid Sequence Selector

  A 3×3 grid that remembers the order you light it up in, then unwinds itself in reverse.

  Problem StatementSolutionCode Walkthrough

• 02Tokenizer Playground

  Exact GPT token counts computed in the browser from the real BPE merge ranks — no API, no key, no text leaving the page.

  Problem StatementSolutionCode Walkthrough