Add shard_00015.manifest.json

manifests/shard_00015.manifest.json

@@ -0,0 +1,19 @@
+{
+  "shard_id": 15,
+  "rows": 165060,
+  "size_mb": 200.0,
+  "compression": "zstd",
+  "source_breakdown": {
+    "cosmopedia_v2": 0.0838,
+    "tiny_textbooks": 0.0219,
+    "fineweb_edu": 0.1685,
+    "finewiki": 0.3412,
+    "python_edu": 0.1015,
+    "arithmetic": 0.1192,
+    "tiny_math": 0.1204,
+    "tiny_strange": 0.0274,
+    "mini_en": 0.0161
+  },
+  "created_at": "2026-07-13T16:05:57.638816Z",
+  "run_name": "bison-data-v2"
+}