tiny-aya-global-sql-selfheal (DPO)

LoRA adapter for CohereLabs/tiny-aya-global (3.35B) from a fully automated self-healing text-to-SQL loop (Lexsi Labs Hackathon, Track 3, PS #8). Failures are detected by executing the SQL on real Spider databases, classified, corrected by Aya Expanse 32B (every fix verified by execution; the healer never sees the gold query), and retrained through AgentTune. Deployment is decided by AgentTune's DeploymentGate on held-out data.

Recipe: DPO (AgentTune RetrainConfig, TRL), LoRA r=16/alpha=32 on all projections, 158 verified pairs, 3 epochs, lr 1e-5, beta 0.1.

Result: Gate split 58.0% vs baseline 62.0% (-4pp, fixed 4 / broke 8); test 44.6% vs 45.6%. The DeploymentGate BLOCKED this adapter (task accuracy regressed). The write-up explains why: likelihood displacement on minimal-edit SQL pairs plus catastrophic forgetting.

• Project page + code: https://huggingface.co/spaces/HideIron/selfheal-sql
• All run logs and gate decisions: https://huggingface.co/datasets/HideIron/selfheal-sql-runs
• Training data: 158 execution-verified fix pairs (heal/baseline-pool600 in the runs repo)