ac3e718cb2
Forbid the footnote/legend pattern: explanations for a marked
line must live inline at that line (rule 2), never in a
post-block `[1] = …, [2] = …` key that forces the reader to
bounce between code and a legend below it. A marker is purely a
label so the user can point ('expand [2]'); a line that reads
for itself carries a bare marker and no comment.
Rework rule 4 accordingly, add the Iron Law line, guard rule 1's
supporting-prose clause against becoming a legend, and rewrite
the worked example's trailing commentary to demonstrate inline
explanation with no marker key. Frontmatter and README updated.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>