Zauberwald/.planning/phases/01-grundger-st-tippmechanik/01-04-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
01-grundger-st-tippmechanik	04	game	typing tdd adaptive-tempo keyboard vitest	phase provides 01-02 QWERTZ keyboard rendering with finger colors and highlight/press animations phase provides 01-03 Level definitions with key sets and getKeysUpToLevel function	Typing exercise engine: generateLetters, createExerciseState, handleKeyPress Adaptive tempo logic: 3s start, -200ms/+500ms, bounds 1.5-4s Lesson screen UI with falling letters and keyboard integration Lesson completion flow: progress update, next level unlock	01-05 phase-02 phase-03	added patterns TDD RED-GREEN for game logic State mutation pattern for exercise state Cleanup function pattern for screen lifecycle	created modified src/game/typing.ts src/game/typing.test.ts src/ui/screens.ts src/app.ts index.html src/styles/main.css	Exercise state uses direct mutation pattern (not immutable) for simplicity in game loop Streak resets to 0 after speed adjustment to prevent rapid acceleration	TDD RED-GREEN: write failing tests first, then implement to pass Screen init returns cleanup function for teardown onComplete callback pattern for screen-to-app communication	TYPE-01 TYPE-02 TYPE-03 TYPE-04 LEVL-02 LEVL-03	2min	2026-03-29

Phase 01 Plan 04: Typing Exercise Engine Summary

TDD-tested typing engine with adaptive tempo (3s start, 1.5-4s bounds), lesson screen UI with falling letters and keyboard integration, lesson completion unlocking next level

Performance

• Duration: 2 min
• Started: 2026-03-29T09:09:33Z
• Completed: 2026-03-29T09:12:30Z
• Tasks: 2
• Files modified: 6

Accomplishments

• Typing exercise engine with 18 passing tests covering letter generation, key press handling, adaptive tempo, and completion detection
• Lesson screen renders falling letter with float animation, keyboard highlights target key, correct press dissolves letter
• Lesson completion updates progress in IndexedDB: adds to completedLevels, advances currentLevel, increments sessions

Task Commits

Each task was committed atomically:

1. Task 1: Typing exercise logic (RED-GREEN-REFACTOR) - 5fe66cb (feat)
2. Task 2: Lesson screen UI wiring - ba4525d (feat)

Files Created/Modified

• src/game/typing.ts - Core typing engine: generateLetters, createExerciseState, handleKeyPress, getCurrentLetter, isExerciseComplete
• src/game/typing.test.ts - 18 TDD tests covering all exercise behavior
• src/ui/screens.ts - Added initLessonScreen with keyboard rendering and keydown handling
• src/app.ts - Added startLesson function with progress update on completion
• index.html - Lesson screen HTML with letter-area and lesson-keyboard containers
• src/styles/main.css - Falling letter styles, float animation, dissolve effect

Decisions Made

• Exercise state uses direct mutation (not immutable copies) for simplicity in the game loop
• Streak counter resets to 0 after triggering a speed adjustment, preventing rapid acceleration
• db parameter kept in initLessonScreen signature (prefixed with underscore) for future use when lesson analytics are added

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed unused import and parameter TypeScript errors

• Found during: Task 2
• Issue: isExerciseComplete imported but unused in screens.ts; db parameter unused in initLessonScreen
• Fix: Removed unused import, prefixed unused param with underscore
• Files modified: src/ui/screens.ts
• Verification: npx tsc --noEmit passes
• Committed in: ba4525d (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.

Next Phase Readiness

• Typing engine ready for forest screen integration (Plan 05)
• startLesson exported from app.ts, ready to be called from forest/level map
• All 37 tests passing (levels + db + typing)

---

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