{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:sensorium-biosignal-window:v1",
  "title": "sensorium-biosignal-window.v1",
  "description": "Transient synthetic window, grouped by independent preset. Min/max summarize present samples in the retained monotonic window; they are neither contact quality nor a feature recipe. Evictions count source blocks, not SDK losses. No physical sensing latency or continuity is inferred.",
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": [
    "doc/project/40-proposals/096-sensorium-brainflow-connector.md"
  ],
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema",
    "schema/v",
    "evidence/class",
    "quality",
    "position",
    "retained/bytes",
    "retained/high-water-bytes",
    "retained/high-water-blocks",
    "retained/oldest-age-ms",
    "evicted/blocks",
    "sdk/available-high-water",
    "sdk/loss-quantity",
    "streams",
    "source",
    "window/clock",
    "window/retention-max-ms"
  ],
  "properties": {
    "schema": {
      "const": "sensorium-biosignal-window.v1"
    },
    "schema/v": {
      "const": 1
    },
    "evidence/class": {
      "const": "synthetic"
    },
    "quality": {
      "const": "unknown"
    },
    "position": {
      "type": "string",
      "pattern": "^[0-9]{1,20}$"
    },
    "retained/bytes": {
      "type": "integer",
      "minimum": 0,
      "maximum": 524288
    },
    "retained/high-water-bytes": {
      "type": "integer",
      "minimum": 0,
      "maximum": 524288
    },
    "evicted/blocks": {
      "type": "integer",
      "minimum": 0,
      "maximum": 9007199254740991
    },
    "sdk/available-high-water": {
      "type": "integer",
      "minimum": 0,
      "maximum": 2048
    },
    "sdk/loss-quantity": {
      "const": "unknown"
    },
    "retained/high-water-blocks": {
      "type": "integer",
      "minimum": 0,
      "maximum": 64
    },
    "retained/oldest-age-ms": {
      "type": "integer",
      "minimum": 0,
      "maximum": 2000
    },
    "ingress/bytes-high-water": {
      "type": "integer",
      "minimum": 0,
      "maximum": 65536
    },
    "ingress/blocks-high-water": {
      "type": "integer",
      "minimum": 0,
      "maximum": 2
    },
    "streams": {
      "type": "array",
      "maxItems": 2,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "stream/id",
          "samples",
          "first-data/ms",
          "channels",
          "stream/descriptor",
          "first/receipt-monotonic-ns",
          "last/receipt-monotonic-ns"
        ],
        "properties": {
          "stream/id": {
            "type": "string",
            "minLength": 1,
            "maxLength": 128
          },
          "samples": {
            "type": "integer",
            "minimum": 1,
            "maximum": 4096
          },
          "first-data/ms": {
            "type": "integer",
            "minimum": 0,
            "maximum": 45000
          },
          "channels": {
            "type": "array",
            "minItems": 1,
            "maxItems": 32,
            "items": {
              "type": "object",
              "additionalProperties": false,
              "required": [
                "id",
                "present",
                "min",
                "max"
              ],
              "properties": {
                "id": {
                  "type": "string",
                  "minLength": 1,
                  "maxLength": 128
                },
                "present": {
                  "type": "integer",
                  "minimum": 0,
                  "maximum": 4096
                },
                "min": {
                  "type": [
                    "number",
                    "null"
                  ]
                },
                "max": {
                  "type": [
                    "number",
                    "null"
                  ]
                }
              }
            }
          },
          "stream/descriptor": {
            "$ref": "sensorium-biosignal-stream-descriptor.v1.schema.json"
          },
          "first/receipt-monotonic-ns": {
            "type": "string",
            "pattern": "^[0-9]{1,20}$"
          },
          "last/receipt-monotonic-ns": {
            "type": "string",
            "pattern": "^[0-9]{1,20}$"
          }
        }
      }
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "instance/ref",
        "profile/ref",
        "session/epoch",
        "source/generation"
      ],
      "properties": {
        "instance/ref": {
          "$ref": "sensorium-biosignal-sample-block.v1.schema.json#/properties/metadata/properties/instance~1ref"
        },
        "profile/ref": {
          "$ref": "sensorium-biosignal-sample-block.v1.schema.json#/properties/metadata/properties/profile~1ref"
        },
        "session/epoch": {
          "$ref": "sensorium-biosignal-sample-block.v1.schema.json#/properties/metadata/properties/session~1epoch"
        },
        "source/generation": {
          "$ref": "sensorium-biosignal-sample-block.v1.schema.json#/properties/metadata/properties/source~1generation"
        }
      }
    },
    "window/clock": {
      "const": "host-monotonic-receipt"
    },
    "window/retention-max-ms": {
      "const": 2000
    }
  }
}