Global img cap pinned as a regex invariant (the figure-scoped-cap regression
class); typography floor (12pt body, 56pt cover, 12pt TOC); .page-wide must
NOT carry min-height/flex (the phantom-landscape-page regression class);
centering margin math verified both ways (2400×1000 image → 1.38in,
2050×600 viewBox diagram → 1.93in, page-filling directive block → no margin).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
24 unit tests weighted toward the false-positive guards: wide screenshot
without an alt hint stays portrait, sub-threshold and tall images stay
portrait, deterministic 1560/1561px boundary, whole-word alt matching
('photographic' must not match 'graph'), page=portrait veto beats every
heuristic, diagnostic blocks never promote. E2E gate asserts pdfinfo
per-page boxes through the compiled binary: exactly 3 of 5 fixture blocks
get landscape pages (alt-hinted image, directive-forced image, wide sequence
diagram) while the unhinted screenshot and the veto'd diagram stay portrait —
plus the --toc combo proving TOC and named-page landscape coexist.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Garry Tan