{
  "version": "v1",
  "schema_version": 1,
  "date": "2026-10-18",
  "license": "CC0-1.0",
  "source_file": "data/core_books.csv",
  "source_sha256": "5876380a1bde6ad04b860c71414c9843bc8fc7e03cbcef2e65b92e76d3e69de3",
  "source_records": 413,
  "system_count": 305,
  "family_count": 33,
  "counts": {
    "classified": 212,
    "standalone": 14,
    "unclassified": 79
  },
  "csv_sha256": "41394941dc67ebe79fc0939564ba8a4ae9c6e1a3f61b03ae9cbc81b4f7433cbb",
  "rules_sha256": "bfff1b617439a797d1d8ea595c0cb2275cdd99d887a6a00232ad01f19f90bf8d",
  "families": [
    {
      "id": "2d20",
      "name": "2d20"
    },
    {
      "id": "adventure-game-engine-age",
      "name": "Adventure Game Engine (AGE)"
    },
    {
      "id": "basic-role-playing",
      "name": "Basic Role-Playing"
    },
    {
      "id": "burning-wheel",
      "name": "Burning Wheel"
    },
    {
      "id": "cortex",
      "name": "Cortex"
    },
    {
      "id": "cypher-system",
      "name": "Cypher System"
    },
    {
      "id": "dnd-d20",
      "name": "D&D / d20"
    },
    {
      "id": "d6-system",
      "name": "D6 / OpenD6"
    },
    {
      "id": "earthdawn-step-system",
      "name": "Earthdawn / Step System"
    },
    {
      "id": "fate-fudge",
      "name": "Fate / Fudge"
    },
    {
      "id": "forged-in-the-dark",
      "name": "Forged in the Dark"
    },
    {
      "id": "gumshoe",
      "name": "GUMSHOE"
    },
    {
      "id": "gurps",
      "name": "GURPS"
    },
    {
      "id": "hero-system",
      "name": "HERO System"
    },
    {
      "id": "into-the-odd-nsr",
      "name": "Into the Odd / NSR"
    },
    {
      "id": "kids-on-bikes",
      "name": "Kids on Bikes"
    },
    {
      "id": "mork-borg",
      "name": "Mörk Borg"
    },
    {
      "id": "mutants-and-masterminds",
      "name": "Mutants & Masterminds"
    },
    {
      "id": "palladium-megaversal",
      "name": "Palladium Megaversal"
    },
    {
      "id": "powered-by-the-apocalypse",
      "name": "Powered by the Apocalypse"
    },
    {
      "id": "resistance-system",
      "name": "Resistance System"
    },
    {
      "id": "rolemaster",
      "name": "Rolemaster"
    },
    {
      "id": "roll-and-keep",
      "name": "Roll and Keep"
    },
    {
      "id": "saga",
      "name": "SAGA"
    },
    {
      "id": "savage-worlds",
      "name": "Savage Worlds"
    },
    {
      "id": "storyteller-system",
      "name": "Storyteller System"
    },
    {
      "id": "storytelling-system",
      "name": "Storytelling System"
    },
    {
      "id": "torg-masterbook",
      "name": "Torg / MasterBook"
    },
    {
      "id": "traveller",
      "name": "Traveller"
    },
    {
      "id": "unisystem",
      "name": "Unisystem"
    },
    {
      "id": "vortex",
      "name": "Vortex"
    },
    {
      "id": "warhammer-d100-lineage",
      "name": "Warhammer d100 lineage"
    },
    {
      "id": "year-zero-engine",
      "name": "Year Zero Engine"
    }
  ]
}