---
phase: 01-grundger-st-tippmechanik
plan: 03
subsystem: game
tags: [qwertz, keyboard, levels, finger-mapping, css-animation, tdd]

# Dependency graph
requires:
  - phase: 01-01
    provides: "TypeScript interfaces (Level, KeyboardLayout), CSS design system with finger color variables"
provides:
  - "Level definitions 1-6 with key sets and finger mappings"
  - "QWERTZ keyboard renderer with finger colors, pulse/press animations"
  - "DE and CH keyboard layout data"
affects: [01-04, 01-05]

# Tech tracking
tech-stack:
  added: []
  patterns: [tdd-red-green, shared-finger-map, css-animation-classes]

key-files:
  created:
    - src/game/levels.ts
    - src/game/levels.test.ts
    - src/game/keyboard.ts
  modified:
    - src/styles/main.css

key-decisions:
  - "Shared fingerMap record used by both levels.ts and keyboard.ts (duplicated for independence)"
  - "Keyboard uses CSS variable references for finger colors, resolved at render time"

patterns-established:
  - "Level data: shared fingerMap record, cumulative allKeys array per level"
  - "Keyboard renderer: DOM-based with Map<string, HTMLElement> for key lookup"
  - "Animation: CSS class toggle for highlight/press states, no JS animation"

requirements-completed: [KYBD-01, KYBD-02, KYBD-03, KYBD-04, KYBD-05, LEVL-01]

# Metrics
duration: 3min
completed: 2026-03-29
---

# Phase 01 Plan 03: Keyboard & Levels Summary

**QWERTZ keyboard renderer with finger-colored keys, pulse/press animations, and level definitions 1-6 per spec progression table**

## Performance

- **Duration:** 3 min
- **Started:** 2026-03-29T09:05:09Z
- **Completed:** 2026-03-29T09:07:56Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments
- Level definitions 1-6 with correct key progressions matching spec section 4.1 (F/J/Space through E/I)
- Finger-to-CSS-variable mapping for all QWERTZ keys per spec section 8.3
- Full QWERTZ keyboard renderer with DE and CH layout support
- Pulse animation on target key and press animation on keydown via CSS classes
- 14 passing tests covering all level data and helper functions

## Task Commits

Each task was committed atomically:

1. **Task 1: Level definitions with key sets and finger mappings (TDD)**
   - RED: `3462a67` (test) - 14 failing tests for levels array and helpers
   - GREEN: `afae18d` (feat) - level definitions 1-6 with finger mappings
2. **Task 2: QWERTZ keyboard renderer with finger colors and animations** - `2f0784f` (feat)

## Files Created/Modified
- `src/game/levels.ts` - Level definitions 1-6, getLevelByNumber, getKeysUpToLevel exports
- `src/game/levels.test.ts` - 14 tests covering levels, key progressions, finger mappings, helpers
- `src/game/keyboard.ts` - renderKeyboard, highlightKey, pressKey, updateKeyboardForLevel exports
- `src/styles/main.css` - Keyboard CSS: layout, finger colors, pulse/press animations, inactive styling

## Decisions Made
- Finger color map duplicated in keyboard.ts (includes number row keys) rather than importing from levels.ts, keeping modules independent
- Keyboard uses CSS variable references (e.g., `var(--finger-l-index)`) set via inline style, resolved against design system variables

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Fixed TypeScript strict null check errors**
- **Found during:** Task 2 (tsc --noEmit verification)
- **Issue:** Unused `keyboardContainer` variable and possible undefined array access in keyboard.ts; array index access in test file
- **Fix:** Removed unused variable, added non-null assertion on array access
- **Files modified:** src/game/keyboard.ts, src/game/levels.test.ts
- **Verification:** `npx tsc --noEmit` exits 0
- **Committed in:** 2f0784f (Task 2 commit)

---

**Total deviations:** 1 auto-fixed (1 bug)
**Impact on plan:** Minor TypeScript strictness fix. No scope creep.

## Issues Encountered
None.

## User Setup Required
None - no external service configuration required.

## Known Stubs
None - no stubs or placeholder data that affect plan goals.

## Next Phase Readiness
- Keyboard component ready for integration in typing exercise (Plan 04)
- Level data available for forest overview level grid (Plan 05)
- Both DE and CH layouts defined, identical for levels 1-6

---
*Phase: 01-grundger-st-tippmechanik*
*Completed: 2026-03-29*
