- PEFT/LoRA fine-tuning (r=8, alpha=16) — only 1.2% params trainable - Data augmentation: templates + crypto slang (5x from 177→885 samples) - Human-in-the-loop CLI verification with persistent JSONL log - Disk-conscious: save_total_limit=1, ~6MB adapter size - CPU-friendly, single-file deployment - Tested: 1 epoch in ~4min on CPU, 6MB adapter