Driven by on-device iteration on a Galaxy S24+ (live ADB install/
screenshot loop), gated by a real-device motion pass at animator
scale 1x and frame stats (p95 8ms, 0.85% legacy jank).
Motion (Codex): X/Y axes animate in independent concurrent effects.
The prior sequential animateTo calls starved Y under ~50Hz
retargeting - diagonal movement traced an L and the second axis
caught up seconds late. Reduced-motion/system-disabled paths snap
both axes.
Instrument (Claude, on Codex's base):
- Fluorescent yellow-green fluid (matches real spirit-level dye);
amber retained for guidance text.
- Bubble as a true void: borderless symmetric gradient orb,
translucent interior (marks read through it), soft bright
refraction band, contact shadow, fluorescent halo, window-style
reflection + glint. Velocity-squash experiment tried and removed -
shape fidelity beats the flourish.
- Bubble (0.12R) nests inside the 1-degree target ring; ring turns
lime on VISUAL containment of the drawn bubble (lock label/pulse/
haptic remain on LockDetector truth).
- Machined bezel, etched cardinal/45 ticks, per-ring degree labels
via the same SurfaceGuidance mapping. dp-scaled strokes replace
raw-pixel hairlines; contrast lifted for real screens.
- Red center target dot beneath the translucent bubble (Codex).
Text hierarchy: guidance suppressed while locked (no correction
advice under a 'Flat within' verdict), demoted to titleLarge, and
raised into the empty status line's slot. Primary readout optically
dead-centered via an invisible leading degree twin; degree symbol
.55em at TextDim with cap-height baseline shift (.38 - metrics pair,
resize together).
59 tests passing.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
thejayman77