{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.kxm.dev/session-brief.schema.json",
  "title": "KXM session brief",
  "type": "object",
  "required": [
    "schema",
    "generatedAt",
    "staleSeconds",
    "source",
    "hub",
    "stats",
    "tasks",
    "plans",
    "statusLine",
    "widgetLines"
  ],
  "properties": {
    "schema": {
      "const": "kxm.session-brief.v1"
    },
    "generatedAt": {
      "$ref": "common.schema.json#/$defs/timestamp"
    },
    "staleSeconds": {
      "type": "number",
      "minimum": 0
    },
    "source": {
      "type": "string",
      "enum": ["legacy", "runtime", "both"]
    },
    "hub": {
      "type": "object",
      "required": ["state", "evidence"],
      "properties": {
        "state": {
          "type": "string",
          "enum": ["on", "off", "unknown"]
        },
        "evidence": {
          "type": "string",
          "enum": ["probed", "bound", "cached", "unconfigured", "process", "timeout"]
        },
        "online": {
          "type": "boolean"
        },
        "url": {
          "type": "string"
        }
      }
    },
    "cost": {
      "type": "string"
    },
    "sessionToken": {
      "type": "string"
    },
    "stats": {
      "type": "object",
      "required": ["activeTasks", "waitingTasks", "planCount", "inbox", "runTotal"],
      "properties": {
        "activeTasks": {
          "type": "integer",
          "minimum": 0
        },
        "waitingTasks": {
          "type": "integer",
          "minimum": 0
        },
        "planCount": {
          "type": "integer",
          "minimum": 0
        },
        "inbox": {
          "type": "integer",
          "minimum": 0
        },
        "runTotal": {
          "type": "integer",
          "minimum": 0
        },
        "latestPlan": {
          "type": "string"
        }
      }
    },
    "tasks": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["kind", "id", "runId", "label", "detail", "prompt"],
        "properties": {
          "kind": {
            "const": "task"
          },
          "id": {
            "type": "string"
          },
          "runId": {
            "type": "string"
          },
          "label": {
            "type": "string"
          },
          "detail": {
            "type": "string"
          },
          "prompt": {
            "type": "string"
          }
        }
      }
    },
    "plans": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["kind", "id", "runId", "label", "detail", "prompt"],
        "properties": {
          "kind": {
            "const": "plan"
          },
          "id": {
            "type": "string"
          },
          "runId": {
            "type": "string"
          },
          "label": {
            "type": "string"
          },
          "detail": {
            "type": "string"
          },
          "prompt": {
            "type": "string"
          }
        }
      }
    },
    "statusLine": {
      "type": "string",
      "maxLength": 80
    },
    "widgetLines": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  }
}