The world-scale pivot (2026-09-17): node/label/arrowhead sizes were
calibrated as "screen px at fit zoom", a unit whose meaning depended on
the graph's own extent — a 13-node graph at kFit 3.65 rendered 5.3x
smaller nodes than a 338-node graph at kFit 0.69, with no slider values
able to reproduce the dense feel. Sizes are now canonical WORLD units
(graph-canvas.ts drops the ÷kFit division in geometry/regions/hit-test);
kFit survives only as the label-gate 1x reference. The renderer's module
doc and the SIZE SEMANTICS block in render-settings.ts carry the story.
Camera becomes pure persisted view state: {k, x, y} stored to localStorage
(lh.graph.camera.v1, 250ms debounce, flush on unmount), restored on mount
via the new initialCamera constructor arg; the hardcoded fit() runs only
on first-ever open. A pin test locks the d3 zoomIdentity composition.
Region blur becomes world units too (the last span-coupled quantity): the
old bitmap-px reach scaled with graph span, so the 2026-09-14
search-filter collapse fix is now structural (blurW = tuning.blur; the
cellRef anchor is gone). Charge default bumps to -240 (single source:
CHARGE_STRENGTH in layout.ts; CHARGE_RANGE re-anchored so -240 sits
dead-center).
The 2026-09-17 bake — the user's live-tuned defaults (nodeSize 2,
edgeWidth 1, arrowLength 2, labelSize 3, labelZoom 4 / "8x", dilation 20,
blur 20, edgeAlpha 0.2, bitmap 256) — plus the ladder pivot: every
non-physics knob moves on a hand-authored 11-stop ladder (x1.5/x1.33
series, quarter/half steps at the low end), default dead-center at slider
position 50, step 10 = one stop per detent. The sanitizer snaps ANY
incoming value to the nearest stop (ties break low), so stored files can
never hold 2.18137...977-style artifacts; pre-pivot files (sizeUnits !=
"world") reset only the four resemanticized size fields. Physics sliders
keep the fine-grained log mapping.
The label cross-fade becomes PROPORTIONAL to the gate (span = gate x
LABELS_FADE_RATIO): the old absolute 0.5-ratio span read as a 100%
relative change at the old 0.5 gate but a 12% sliver at the tuned 8x —
"lower zoom levels naturally produce a longer transitionary period".
At the 8x default the node→cluster handoff now fades across one full
ladder stop (8x -> 12x). labelZoomDisplay is absolute (ratio / 0.5) so
the tuned gate keeps reading "8x" now that 4 IS the default.
Gates: 495/495 tests, tsc/eslint/build clean.
amosblomqvist
0f93124c7e