Update root README — checkpoint-16000 logged

README.md

@@ -419,3 +419,14 @@ https://creativecommons.org/licenses/by-nc/4.0/
 **Epoch:** 0.460
 **Zone:** 🎯 Sweet Spot
 **Status:** Training ongoing — auto-uploaded via train_v12.py
+
+---
+
+### 🔵 Checkpoint — Step 16,000
+**Date:** June 27, 2026 at 22:07 IST
+**Checkpoint:** checkpoint-16000
+**Step:** 16,000 / 40,000 (40.0% complete)
+**Loss:** 0.1250
+**Epoch:** 0.468
+**Zone:** 🎯 Sweet Spot
+**Status:** Training ongoing — auto-uploaded via train_v12.py