{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://huggingface.co/datasets/OpenChainBench/benchmarks/blob/main/schemas/headlines.schema.json",
  "title": "OCB headlines row",
  "description": "One row per (slug, snapshot_date). Lightweight headline feed.",
  "type": "object",
  "required": [
    "snapshot_date",
    "captured_at",
    "slug",
    "title",
    "category",
    "metric",
    "unit",
    "status",
    "schema_version"
  ],
  "properties": {
    "snapshot_date":     { "type": "string", "format": "date" },
    "captured_at":       { "type": "string", "format": "date-time" },
    "slug":              { "type": "string" },
    "title":             { "type": "string" },
    "category":          { "type": "string" },
    "metric":            { "type": "string" },
    "unit":              { "type": "string" },
    "status":            { "type": "string", "enum": ["live", "draft", "insufficient"] },
    "value":             { "type": ["number", "null"] },
    "higher_is_better":  { "type": ["boolean", "null"] },
    "leader_name":       { "type": ["string", "null"] },
    "leader_slug":       { "type": ["string", "null"] },
    "leader_value":      { "type": ["number", "null"] },
    "bench_sample_size": { "type": ["number", "null"] },
    "as_of":             { "type": ["string", "null"], "format": "date-time" },
    "citation_url":      { "type": "string", "format": "uri" },
    "stat_api_url":      { "type": "string", "format": "uri" },
    "source_url":        { "type": ["string", "null"], "format": "uri" },
    "license":           { "type": "string", "const": "CC-BY-4.0" },
    "schema_version":    { "type": "integer", "minimum": 1 }
  }
}