Frame ML Problem

Write ## Modeling decisions in journal/JOURNAL.md. The table is the contract. This skill does not declare a learner and does not evaluate one.

Human-facing prose

Details: setup-workspace references/human_facing_prose.md. Journal rows describe this dataset. Do not name the skills framework, the CLI, or a splitter class in the table. Questions use data-science language — not skill ids, G-* names, or the wrapper CLI.

Procedure