Add debugging script to visualize the constrained 2D difficulty progression:
- Traces 30 steps from beginner → maximum difficulty
- Shows path through (regrouping, scaffolding) space as 2D ASCII grid
- Marks preset positions (BEG, EAR, INT, ADV, EXP)
- Visualizes constraint band boundaries
- Helps verify navigation completeness and detect cycles
Usage: npx tsx scripts/traceDifficultyPath.ts
Output shows diagonal progression through pedagogical constraint band,
confirming no dead ends or invalid states.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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