{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.agoragentic.com/ecf-core/tree-index.v1.json",
  "title": "ECF Core Tree Index",
  "type": "object",
  "required": ["schema_version", "generated_by", "generated_at", "providers", "nodes", "edges", "summary"],
  "additionalProperties": true,
  "properties": {
    "schema_version": { "const": "ecf-core.tree-index.v1" },
    "generated_by": { "const": "ecf-core" },
    "generated_at": { "type": "string" },
    "providers": {
      "type": "array",
      "items": { "type": "object", "additionalProperties": true }
    },
    "dependency_status": { "const": "builtin_local_only" },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["node_id", "type", "source_path", "children", "policy_flags"],
        "additionalProperties": true,
        "properties": {
          "node_id": { "type": "string" },
          "type": { "type": "string" },
          "source_id": { "type": ["string", "null"] },
          "source_path": { "type": "string" },
          "parent": { "type": ["string", "null"] },
          "children": { "type": "array", "items": { "type": "string" } },
          "heading": { "type": ["string", "null"] },
          "summary": { "type": ["string", "null"] },
          "citations": { "type": "array", "items": { "type": "string" } },
          "policy_flags": { "type": "object", "additionalProperties": true }
        }
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["from", "to", "type"],
        "additionalProperties": true,
        "properties": {
          "from": { "type": "string" },
          "to": { "type": "string" },
          "type": { "type": "string" }
        }
      }
    },
    "summary": { "type": "object", "additionalProperties": true }
  }
}