{
  "metadata": {
    "version": "1.0",
    "revision": "2026-07-11.1",
    "status": "ACTIVE",
    "last_updated": "2026-07-11",
    "updated_by": "Codex",
    "reviewed_by": "Codex",
    "source_commit": "e0acc39c6c1b5d5dead5b619ad48c85a85743262",
    "task_id": "KGEN-GOV-BIO-2026-0001",
    "change_reason": "Define evolution event schema.",
    "ancestor": "KGEN-KAIOS/EVOLUTION_LINEAGE_STANDARD.md",
    "source_of_truth": true
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "KGEN Evolution Event",
  "type": "object",
  "required": [
    "evolution_event_id",
    "organism_id",
    "event_type",
    "from_version",
    "to_version",
    "parent_species",
    "child_species",
    "source_task",
    "source_commit",
    "author_agent",
    "reviewer_agent",
    "compatibility_result",
    "migration_required",
    "rollback_path"
  ],
  "properties": {
    "evolution_event_id": { "type": "string" },
    "organism_id": { "type": "string" },
    "event_type": {
      "enum": ["CREATE", "MUTATE", "UPGRADE", "FORK", "MERGE", "FUSION", "SPLIT", "REPRODUCE", "DEPRECATE", "ARCHIVE", "REVIVE"]
    },
    "from_version": { "type": "string" },
    "to_version": { "type": "string" },
    "parent_species": { "type": ["string", "null"] },
    "child_species": { "type": ["string", "null"] },
    "source_task": { "type": "string" },
    "source_commit": { "type": "string" },
    "author_agent": { "type": "string" },
    "reviewer_agent": { "type": "string" },
    "compatibility_result": { "type": "string" },
    "migration_required": { "type": "boolean" },
    "rollback_path": { "type": "string" }
  }
}