{
  "version": "v2",
  "schema_version": 2,
  "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": "1eff125118a1d4f5737f3eb3c4075168d118f1176a86a383ca9a2a2c6275b34b",
  "rules_sha256": "04823dcccf2c915c97f649b27955b64c486da4354a050fb7ce4f6302997f0dad",
  "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"
    }
  ],
  "previous_version": "v1",
  "changes": [
    "Preserve all v1 family assignments and stable system/family IDs.",
    "Add a researched public Discord server registry and explicit many-to-many system/family associations in the same version."
  ],
  "discord": {
    "servers_file": "v2-discord-servers.csv",
    "servers_sha256": "7e1713e56f3f362cce6e12d156b6262ac3be0fa77b59526b1a0ebe4d1ccfe836",
    "mappings_file": "v2-discord-mappings.csv",
    "mappings_sha256": "168c7d5db38e7029e82459627563e0114973667f8561979f58dfb31f54217bdf",
    "server_count": 46,
    "mapping_count": 148,
    "mapped_system_count": 90,
    "mapped_family_count": 27,
    "checked_on": "2026-10-18",
    "coverage": "Initial non-exhaustive research across publisher, creator and fan communities; zero associations mean no confirmed mapping in this release. Internal channels were not audited. No member counts are part of this classification.",
    "member_count_documentation": "https://docs.discord.com/developers/resources/invite#get-invite",
    "research_gaps": [
      "No usable public invite confirmed for Unisystem, SAGA, Roll and Keep, Vortex, HERO System or Warhammer d100 lineage in this pass.",
      "Some located Burning Wheel HQ invites, two Green Ronin community links and a DungeonCrawlers link returned Discord 404 and were excluded.",
      "One invite advertised on a HERO forum resolved to an unrelated Mythic GME server and was excluded.",
      "Delta Green publisher lists communities but requests asking for current invitations; no server was added without a verified public invite.",
      "This is primarily English-language discovery, with some multilingual communities; it is not a census of public Discord servers."
    ]
  }
}