Update root README — checkpoint-23000 logged

README.md

@@ -551,3 +551,14 @@ https://creativecommons.org/licenses/by-nc/4.0/
 **Epoch:** 0.643
 **Zone:** 🎯 Sweet Spot
 **Status:** Training ongoing — auto-uploaded via train_v12.py
+
+---
+
+### 🔵 Checkpoint — Step 23,000
+**Date:** June 30, 2026 at 07:12 IST
+**Checkpoint:** checkpoint-23000
+**Step:** 23,000 / 40,000 (57.5% complete)
+**Loss:** 0.3085
+**Epoch:** 0.672
+**Zone:** 📈 Good
+**Status:** Training ongoing — auto-uploaded via train_v12.py