{
  "schema_name": "stats_maps_json",
  "schema_version": 1,
  "artifact": "stats/maps.json",
  "format": "json",
  "description": "Per-map dataset composition and round behavior summary.",
  "source_artifacts": [
    "manifest.parquet",
    "round_index.parquet",
    "match_index.parquet"
  ],
  "fields": [
    {
      "name": "schema_version",
      "json_type": "integer",
      "value": 1
    },
    {
      "name": "generated_at_utc",
      "json_type": "string"
    },
    {
      "name": "maps",
      "json_type": "array",
      "description": "One entry per released map_slug."
    }
  ],
  "map_entry": {
    "required_fields": [
      "map_slug",
      "dataset_scale",
      "splits",
      "round_duration_s",
      "round_frames",
      "round_winner_counts",
      "round_end_reason_counts"
    ]
  },
  "dataset_scale_fields": [
    "samples",
    "matches",
    "rounds",
    "hours",
    "frames",
    "percent_hours"
  ],
  "split_entry_fields": [
    "samples",
    "matches",
    "rounds",
    "hours",
    "frames"
  ],
  "round_duration_s_fields": [
    "round_lifecycle",
    "alive_intersection",
    "clip_intersection",
    "clip_union"
  ],
  "round_frames_fields": [
    "alive_intersection",
    "clip_intersection",
    "clip_union"
  ],
  "distribution_fields": [
    "count",
    "mean",
    "std",
    "min",
    "p05",
    "p25",
    "median",
    "p75",
    "p95",
    "max"
  ],
  "validation": [
    "one maps entry exists for each released map_slug",
    "sum(map.dataset_scale.samples) == row count of manifest.parquet",
    "sum(map.dataset_scale.matches) == row count of match_index.parquet",
    "sum(map.dataset_scale.rounds) == row count of round_index.parquet",
    "sum(map.dataset_scale.frames) == sum(manifest.frames)",
    "sum(map.dataset_scale.percent_hours) is approximately 100",
    "each maps entry has train, val, and test split entries",
    "round_duration_s.round_lifecycle is derived from round_stop_tick - round_start_tick",
    "round_duration_s.alive_intersection is derived from alive_intersection frames/ticks",
    "round_duration_s.clip_intersection is derived from clip_intersection frames/ticks",
    "round_duration_s.clip_union is derived from released sample frames grouped by round/map",
    "round_winner_counts keys include T, CT, and unknown"
  ]
}