Update root README — checkpoint-4000 logged

README.md

@@ -133,3 +133,25 @@ https://creativecommons.org/licenses/by-nc/4.0/
 **Epoch:** 0.088
 **Zone:** 📈 Good
 **Status:** Training ongoing — auto-uploaded via train_v12.py
+
+---
+
+### 🔵 Checkpoint — Step 3,876
+**Date:** June 23, 2026 at 23:40 IST
+**Checkpoint:** checkpoint-3876
+**Step:** 3,876 / 40,000 (9.7% complete)
+**Loss:** 0.3439
+**Epoch:** 0.113
+**Zone:** 📈 Good
+**Status:** Training ongoing — auto-uploaded via train_v12.py
+
+---
+
+### 🔵 Checkpoint — Step 4,000
+**Date:** June 24, 2026 at 00:54 IST
+**Checkpoint:** checkpoint-4000
+**Step:** 4,000 / 40,000 (10.0% complete)
+**Loss:** 0.3980
+**Epoch:** 0.117
+**Zone:** 📈 Good
+**Status:** Training ongoing — auto-uploaded via train_v12.py