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dataset_info.json

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+{
+  "name": "cs8-fixed-v4",
+  "condition": "fixed",
+  "version": "v4",
+  "description": "CS8 fixed-mapping condition v4. T2 alias group redesigned: whs/budg/srvc (low first-subtoken fan-out) replaced by tsk/brc/prj (fan-out >=712) to ensure all T2 aliases commit late. NL-SQL aggregate mismatch fix from v3 retained.",
+  "changes_from_v3": {
+    "removed": [
+      {
+        "alias": "whs",
+        "table": "warehouses",
+        "reason": "first-subtoken \u0120wh fan-out=61 \u2192 commits early"
+      },
+      {
+        "alias": "budg",
+        "table": "budgets",
+        "reason": "first-subtoken \u0120bud fan-out=8 \u2192 commits early"
+      },
+      {
+        "alias": "srvc",
+        "table": "services",
+        "reason": "first-subtoken \u0120sr fan-out=4 \u2192 commits early"
+      }
+    ],
+    "added": [
+      {
+        "alias": "tsk",
+        "table": "tasks",
+        "first_subtoken": "\u0120t",
+        "fan_out": 1586
+      },
+      {
+        "alias": "brc",
+        "table": "branches",
+        "first_subtoken": "\u0120b",
+        "fan_out": 1329
+      },
+      {
+        "alias": "prj",
+        "table": "projects",
+        "first_subtoken": "\u0120pr",
+        "fan_out": 712
+      }
+    ]
+  },
+  "regression_evidence": {
+    "dataset": "CS7-fixed-v2, seed s42, n=18 aliases",
+    "M1_R2_tokenization_only": 0.465,
+    "M2_R2_prior_only": 0.046,
+    "M3_R2_both": 0.51,
+    "unique_R2_tokenization": 0.464,
+    "unique_R2_prior": 0.044,
+    "interpretation": "Tokenization type (T1/T2) is dominant predictor; prior strength negligible confound."
+  },
+  "alias_groups": {
+    "T1": [
+      "emp",
+      "inv",
+      "txn",
+      "mgr",
+      "ord",
+      "prod",
+      "cust",
+      "dept",
+      "acct",
+      "sale"
+    ],
+    "T2": [
+      "tsk",
+      "brc",
+      "rgn",
+      "lne",
+      "prj",
+      "empl",
+      "ordr",
+      "catg",
+      "schd",
+      "shp"
+    ]
+  },
+  "table_alias_map": {
+    "employees": "emp",
+    "invoices": "inv",
+    "transactions": "txn",
+    "managers": "mgr",
+    "orders": "ord",
+    "products": "prod",
+    "customers": "cust",
+    "departments": "dept",
+    "accounts": "acct",
+    "sales": "sale",
+    "tasks": "tsk",
+    "branches": "brc",
+    "regions": "rgn",
+    "items": "lne",
+    "projects": "prj",
+    "staff": "empl",
+    "requests": "ordr",
+    "categories": "catg",
+    "schedules": "schd",
+    "shipments": "shp"
+  },
+  "fan_out_by_alias": {
+    "emp": 1,
+    "inv": 1,
+    "txn": 1,
+    "mgr": 1,
+    "ord": 1,
+    "prod": 1,
+    "cust": 1,
+    "dept": 1,
+    "acct": 1,
+    "sale": 1,
+    "tsk": 1586,
+    "brc": 1329,
+    "rgn": 1534,
+    "lne": 883,
+    "prj": 712,
+    "empl": 110,
+    "ordr": 95,
+    "catg": 36,
+    "schd": 36,
+    "shp": 30
+  },
+  "split_sizes": {
+    "train": 19200,
+    "val": 4800
+  },
+  "examples_per_alias": {
+    "train": 960,
+    "val": 240
+  },
+  "generation": {
+    "seed": 42,
+    "generated_at": "2026-06-02T23:29:40.971229",
+    "script": "src/00_data/generate_cs8_fixed_v4.py"
+  }
+}