# PROGRESS.md — eng-pad Implementation Progress

This file tracks completed work and decisions. Updated after every step.
See PROJECT_PLAN.md for the full step list.

## Completed

### Phase 0: Project Documents (2026-03-24)

- [x] 0.1: Created DESIGN.md — full technical design covering architecture,
  data model, coordinate system, rendering, input handling, and source tree.
- [x] 0.2: Created PROJECT_PLAN.md — discrete steps grouped by phase with
  checkboxes and file references.
- [x] 0.3: Created PROGRESS.md — this file.
- [x] 0.4: Updated CLAUDE.md — build commands, source tree, project doc
  pointers.

### Phase 1: Project Skeleton + Data Layer (2026-03-24)

- [x] 1.1: Generated Android project — Gradle 8.14.2, AGP 8.10.1, Kotlin 2.1.20
- [x] 1.2: Version catalog with Compose BOM 2026.03.00, Room 2.8.4,
  Navigation 2.9.7, Lifecycle 2.10.0
- [x] 1.3: Lint configured — warningsAsErrors, AGP version check suppressed
  (AGP 9.x needs Gradle 9.x)
- [x] 1.4: Room entities: Notebook, Page, Stroke, PageSize enum
- [x] 1.5: Converters: FloatArray ↔ ByteArray (packed little-endian)
- [x] 1.6: DAOs: NotebookDao, PageDao, StrokeDao
- [x] 1.7: EngPadDatabase (Room, version 1)
- [x] 1.8: NotebookRepository, PageRepository
- [x] 1.9: Unit tests: StrokeBlobTest (6 tests), PageSizeTest (4 tests) — all pass
- Foojay resolver added for automatic JDK toolchain download
- compileSdk/targetSdk bumped to 36 (required by latest androidx dependencies)

### Phase 2: Notebook List Screen (2026-03-24)

- [x] 2.1: MainActivity with Compose NavHost (three routes: notebooks, pages, editor)
- [x] 2.2: NotebookListViewModel with StateFlow, create/delete operations
- [x] 2.3: NotebookListScreen — lazy list, create dialog (title + page size radio),
  long-press delete with confirmation, empty state
- [x] 2.4: Auto-create page 1 in NotebookRepository.create()
- [x] 2.5: Navigation wired — tap notebook → pages stub, editor stub
- EngPadTheme: high-contrast light color scheme (black on white for e-ink)

## In Progress

Phase 3: Canvas — Basic Drawing

## Decisions & Deviations

- **Language**: Kotlin (chosen over Java for better Compose/coroutine support).
- **Storage**: Room/SQLite with packed float BLOBs for stroke points.
- **Palm rejection**: Hardware only (EMR digitizer handles it).
- **Pressure sensitivity**: None — two fixed pen sizes (0.38mm, 0.5mm).
- **Coordinate system**: 300 DPI canonical points (scaled to 72 DPI for PDF export).
- **UI framework**: Compose for chrome, custom View for canvas (Compose
  Canvas lacks MotionEvent access needed for stylus input).