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dataset_manifest.json

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+{
+  "dataset": "UltraChat-Sinhala (UltraChat-200k machine-translated en->si, NLLB-200-3.3B)",
+  "source": "HuggingFaceH4/ultrachat_200k",
+  "split_method": "train/test membership taken verbatim from the original split by prompt_id",
+  "formats": [
+    "parquet (zstd, schema-compatible with ultrachat_200k)",
+    "jsonl"
+  ],
+  "cleaning": [
+    "NLLB ZWJ-conjunct repair",
+    "MT masking-sentinel leak repair (in-place)",
+    "dropped dialogues with empty turns",
+    "deduplicated prompt_ids",
+    "removed 1 prompt_id shared across SFT/GEN for global id-uniqueness"
+  ],
+  "generated": "2026-06-26",
+  "splits": {
+    "train_sft": {
+      "records": 207831,
+      "parquet_bytes": 708322973,
+      "jsonl_bytes": 3275956541,
+      "parquet_file": "train_sft.parquet",
+      "jsonl_file": "train_sft.sinhala.jsonl"
+    },
+    "test_sft": {
+      "records": 23106,
+      "parquet_bytes": 78631342,
+      "jsonl_bytes": 362942552,
+      "parquet_file": "test_sft.parquet",
+      "jsonl_file": "test_sft.sinhala.jsonl"
+    },
+    "train_gen": {
+      "records": 255974,
+      "parquet_bytes": 704284097,
+      "jsonl_bytes": 3169354214,
+      "parquet_file": "train_gen.parquet",
+      "jsonl_file": "train_gen.sinhala.jsonl"
+    },
+    "test_gen": {
+      "records": 28300,
+      "parquet_bytes": 77517814,
+      "jsonl_bytes": 348842209,
+      "parquet_file": "test_gen.parquet",
+      "jsonl_file": "test_gen.sinhala.jsonl"
+    }
+  }
+}