Guided learning

Tutorial

Work through editable lessons with expected results, embedded editors, and quick run/reset controls.

Starter Problems

Fifteen runnable lessons, already loaded with working code.

These cards mirror the completed starter set in _docs/supplemental/ffm-starter-problems.md. Each one starts with the full solution snippet from the doc, so you can run it immediately, edit it safely, and compare the result against the expected output guidance.

Cards run independently. They do not share stack state, definitions, stdin, or output.