- Ser vs Estar: 100 sentences
- Por vs Para: 100 sentences
- Preterite vs Imperfect: 100 sentences
- Subjunctive Triggers: 100 sentences
- Personal A: 100 sentences
Each session randomly selects 10 from the pool for variety.
Closes#15
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>