{
  "name": "cs9-rand-v1",
  "condition": "rand",
  "version": "v1",
  "description": "CS9 rand-mapping condition v1. All 20 aliases are invented strings with zero surface relation to any table name (no shared 2/3/4-char prefix, no substring match). Fixes the cs8 abbreviation confound. T1: 3-char single-token (rare-word tokens, fid 22k-95k). T2: 4-char two-token with 2+2 BPE split (2-char first tokens, fid 933-54k).",
  "motivation": "CS8 aliases (cust, dept, emp, etc.) are common SQL abbreviations of their assigned table names. A surface-matching heuristic can predict them without any learned commitment, inflating the rand model's geometry silhouette above zero. CS9 aliases have no such relation.",
  "alias_groups": {
    "T1": [
      "bev",
      "cif",
      "dov",
      "fal",
      "gev",
      "hac",
      "jac",
      "kab",
      "lex",
      "nad"
    ],
    "T2": [
      "agov",
      "egiv",
      "ejof",
      "ikob",
      "okiv",
      "uliv",
      "vmob",
      "vnob",
      "xnob",
      "znob"
    ]
  },
  "table_alias_map": {
    "accounts": "jac",
    "customers": "lex",
    "departments": "dov",
    "employees": "bev",
    "invoices": "fal",
    "managers": "hac",
    "orders": "kab",
    "products": "nad",
    "sales": "cif",
    "transactions": "gev",
    "branches": "agov",
    "categories": "egiv",
    "items": "ikob",
    "projects": "uliv",
    "regions": "okiv",
    "requests": "ejof",
    "schedules": "vmob",
    "shipments": "vnob",
    "staff": "xnob",
    "tasks": "znob"
  },
  "fan_out_by_alias": {
    "bev": 1,
    "cif": 1,
    "dov": 1,
    "fal": 1,
    "gev": 1,
    "hac": 1,
    "jac": 1,
    "kab": 1,
    "lex": 1,
    "nad": 1,
    "agov": 95,
    "egiv": 80,
    "ejof": 70,
    "ikob": 60,
    "okiv": 55,
    "uliv": 65,
    "vmob": 50,
    "vnob": 45,
    "xnob": 40,
    "znob": 35
  },
  "split_sizes": {
    "train": 19200,
    "val": 4800
  },
  "examples_per_alias": {
    "train": 960,
    "val": 240
  },
  "generation": {
    "seed": 42,
    "mode": "rand",
    "generated_at": "2026-06-04T15:25:08.578046",
    "script": "src/00_data/generate_cs9_v1.py"
  }
}