{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://hermes.bstein.dev/contracts/hux/v1/project.schema.json",
  "title": "HUX projects and conversations",
  "description": "Organisation model for chats (HUX-03): projects own conversations and promoted artifacts; conversations carry tags, pins and branch lineage. Search indexes the fields listed in $defs/search_index.",
  "$defs": {
    "project": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "schema",
        "id",
        "owner",
        "name",
        "tags",
        "pinned",
        "archived",
        "created_at",
        "updated_at",
        "revision"
      ],
      "properties": {
        "schema": {
          "const": "hux.project.v1"
        },
        "id": {
          "$ref": "common.schema.json#/$defs/id"
        },
        "owner": {
          "$ref": "common.schema.json#/$defs/user_ref"
        },
        "name": {
          "type": "string",
          "minLength": 1,
          "maxLength": 120
        },
        "description": {
          "type": "string",
          "maxLength": 2000
        },
        "tags": {
          "$ref": "common.schema.json#/$defs/tags"
        },
        "pinned": {
          "type": "boolean"
        },
        "archived": {
          "type": "boolean"
        },
        "default_mode": {
          "type": "string",
          "enum": [
            "fast",
            "thoughtful",
            "research",
            "create",
            "private"
          ]
        },
        "memory_scope_id": {
          "$ref": "common.schema.json#/$defs/id"
        },
        "created_at": {
          "$ref": "common.schema.json#/$defs/timestamp"
        },
        "updated_at": {
          "$ref": "common.schema.json#/$defs/timestamp"
        },
        "revision": {
          "$ref": "common.schema.json#/$defs/revision"
        }
      }
    },
    "conversation": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "schema",
        "id",
        "owner",
        "title",
        "tags",
        "pinned",
        "archived",
        "artifact_ids",
        "created_at",
        "updated_at",
        "revision"
      ],
      "properties": {
        "schema": {
          "const": "hux.conversation.v1"
        },
        "id": {
          "$ref": "common.schema.json#/$defs/id"
        },
        "owner": {
          "$ref": "common.schema.json#/$defs/user_ref"
        },
        "project_id": {
          "$ref": "common.schema.json#/$defs/id"
        },
        "title": {
          "type": "string",
          "minLength": 1,
          "maxLength": 200
        },
        "tags": {
          "$ref": "common.schema.json#/$defs/tags"
        },
        "pinned": {
          "type": "boolean"
        },
        "archived": {
          "type": "boolean"
        },
        "mode": {
          "type": "string",
          "enum": [
            "fast",
            "thoughtful",
            "research",
            "create",
            "private"
          ]
        },
        "branch": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "parent_conversation_id",
            "branch_point_message_id"
          ],
          "properties": {
            "parent_conversation_id": {
              "$ref": "common.schema.json#/$defs/id"
            },
            "branch_point_message_id": {
              "type": "string",
              "minLength": 1,
              "maxLength": 120
            }
          }
        },
        "artifact_ids": {
          "type": "array",
          "maxItems": 500,
          "uniqueItems": true,
          "items": {
            "$ref": "common.schema.json#/$defs/id"
          }
        },
        "last_message_at": {
          "$ref": "common.schema.json#/$defs/timestamp"
        },
        "created_at": {
          "$ref": "common.schema.json#/$defs/timestamp"
        },
        "updated_at": {
          "$ref": "common.schema.json#/$defs/timestamp"
        },
        "revision": {
          "$ref": "common.schema.json#/$defs/revision"
        }
      }
    },
    "search_index": {
      "type": "object",
      "description": "Fields the tenant indexes; the UI may not assume anything else is searchable.",
      "additionalProperties": false,
      "required": [
        "conversation"
      ],
      "properties": {
        "conversation": {
          "type": "array",
          "items": {
            "type": "string",
            "enum": [
              "title",
              "tags",
              "message_text",
              "artifact_titles",
              "project_name"
            ]
          }
        }
      }
    }
  },
  "oneOf": [
    {
      "$ref": "#/$defs/project"
    },
    {
      "$ref": "#/$defs/conversation"
    }
  ]
}