{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Crenet AI Asset Ledger Schema",
  "description": "Schema for AI asset tracking, supporting hybrid img2img and human post-edit pipelines.",
  "type": "array",
  "items": {
    "type": "object",
    "required": [
      "file_name",
      "generation_type",
      "timestamp_utc"
    ],
    "properties": {
      "file_name": {
        "type": "string",
        "description": "Path or filename of the final shipped asset in the repository."
      },
      "generation_type": {
        "type": "string",
        "enum": [
          "pure_ai",
          "sketch_to_ai",
          "ai_to_post_edit",
          "sketch_to_ai_to_post_edit"
        ],
        "description": "The specific pipeline methodology used to create the asset."
      },
      "base_human_sketch_ref": {
        "type": "string",
        "description": "Reference path to the original human concept art (required for img2img)."
      },
      "ai_generation_data": {
        "type": "object",
        "description": "Metadata concerning the AI generation phase.",
        "properties": {
          "prompt": {
            "type": "string",
            "description": "Full prompt text used for AI generation."
          },
          "model_used": {
            "type": "string",
            "description": "The AI model used (e.g., Stable Diffusion XL, Midjourney v6)."
          },
          "seed": {
            "type": "string",
            "description": "The generation seed for reproducibility."
          }
        },
        "required": [
          "prompt"
        ]
      },
      "human_post_edit_data": {
        "type": "object",
        "description": "Metadata concerning human authorship applied after generation.",
        "properties": {
          "source_file_ref": {
            "type": "string",
            "description": "Path to the layered project file (e.g., .psd, .kra) proving human modification."
          },
          "modification_description": {
            "type": "string",
            "description": "Brief summary of human edits (e.g., 'repainted cockpit highlights, adjusted silhouette')."
          }
        },
        "required": [
          "source_file_ref",
          "modification_description"
        ]
      },
      "timestamp_utc": {
        "type": "string",
        "format": "date-time",
        "description": "UTC timestamp of the ledger entry creation in ISO 8601 format."
      }
    },
    "additionalProperties": false
  }
}