Update root README — checkpoint-12793 logged

README.md

@@ -320,3 +320,14 @@ https://creativecommons.org/licenses/by-nc/4.0/
 **Epoch:** 0.371
 **Zone:** 📈 Good
 **Status:** Training ongoing — auto-uploaded via train_v12.py
+
+---
+
+### 🔵 Checkpoint — Step 12,793
+**Date:** June 26, 2026 at 20:50 IST
+**Checkpoint:** checkpoint-12793
+**Step:** 12,793 / 40,000 (32.0% complete)
+**Loss:** 0.2054
+**Epoch:** 0.374
+**Zone:** 🎯 Sweet Spot
+**Status:** Training ongoing — auto-uploaded via train_v12.py