The spec stays normative: 5.4 now describes the slower trickle playback
(1000 ms rounds, per-node appearance moments, live counting) that Justin
converged on during implementation, 5.3 the readable seed range, section
6 the taller viewBox and anisotropic layout forces, and StudyPreset its
readingCaption field.
The M4 handoff covers the single-binary embed (with the go:embed vs
gitignored-dist decision called out), Dockerfile, GHCR workflow, and the
Portainer/Caddy stack, plus the traps M3 paid for: lockfile
regeneration, the prettier ignore on generated types, screenshot
helpers, and reviewing perceptual work live.
