thejayman77 f8aa27e6cb Doc cleanup: handoff + load-listener comment match shipped bullseye audio
Codex re-audit of 0cb315f was functional-green (81 tests, clean build,
device-green) with two non-runtime doc findings:
- SOUND_DESIGN_HANDOFF.md still described the retired "Level on lock,
  once, then silence" behavior. Now documents immediate bullseye
  alignment (enter <=0.2 / exit >=0.35 spatial hysteresis, no dwell) and
  the looping level.wav, with the velocity lock kept separate for
  lime/label/haptic.
- The SoundPool load listener's comment still said "one-shot Level";
  updated to describe the pending-loop-start path.

No code behavior change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-17 11:47:23 -04:00
2026-07-11 18:34:57 -04:00

On the Level

Offline-first Android pocket toolset: a trustworthy level, angle meter, and calibrated screen ruler (Pro). Kotlin + Jetpack Compose, single module, no backend.

  • BRIEF.md — the authoritative v1 product & technical brief
  • AUDIT.md — audit of the brief; the amendments it lists are incorporated
  • resources/ — concept board (visual direction)

Building

Open in Android Studio, or:

./gradlew assembleDebug        # build
./gradlew testDebugUnitTest    # measurement-math unit tests

Scaffold status

The project skeleton follows BRIEF.md §Sensor and measurement architecture. Implemented and tested:

  • core/sensors — sensor selection (game rotation vector → gravity → low-passed accelerometer), device-frame gravity stream, and the pure measurement math: orientation mapping, two-sample per-mode calibration (derived in angle space, applied in vector space so it stays correct away from zero), EMA smoothing, lock hysteresis/dwell/debounce, display deadband, placement validity, and the sensor-vector contract (all sources emit device-frame world-up; flat = +9.81 on Z, pinned by SensorContractTest). All unit-tested.
  • core/settings — DataStore preferences and per-mode calibration persistence.
  • core/billing — entitlement interface with a stub (free-tier) implementation.
  • feature/level, feature/angle — live numeric scaffolds wired to the real sensor pipeline, with manual Surface|Edge selection, placement-validity hints, lock state (locked label states the tolerance so it can never contradict the rounded readout), and directional hold-to-zero (vector reference, not magnitude subtraction).
  • feature/ruler, feature/tools — static placeholders.

Not yet implemented (deliberately — see TODO markers):

  • The tactile vial visuals and the spring-animated display value (value 3 of 3 in the brief); scaffold screens render the deadbanded stable value directly.
  • Guided calibration flow UI (math and persistence are done).
  • Edge-mode readout counter-rotation on the portrait-locked activity.
  • Play Billing implementation of ProEntitlementRepository.
  • Screen ruler measurement UI and per-display scale persistence.
  • Audio cue, reduced-motion behaviors, preferences UI.
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