Add rule 7: alongside the control flow, sketch the layout of the
data structures the code in focus reads or builds — record
fields, collection nesting, variant cases relevant to the
question — placed beside the code that touches them and reduced
in the same spirit (only the fields on the topic path). When the
data layout is the question, it leads and the flow becomes the
stub. Iron Law, worked example, frontmatter, and README updated
to match.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Brummel
ec69e34d1b