{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/fallblu/trading-engine/contracts/v16/scenario-stream.schema.json",
  "title": "Trading Engine v16 replay scenario stream record",
  "description": "Market-slice records are ordered and non-overlapping: each start_at is at or after the prior end_at. Equal boundaries are valid. This cross-record rule is enforced semantically.",
  "oneOf": [
    { "$ref": "#/$defs/headerRecord" },
    { "$ref": "#/$defs/sliceRecord" },
    { "$ref": "#/$defs/endRecord" }
  ],
  "$defs": {
    "headerRecord": {
      "type": "object",
      "additionalProperties": false,
      "required": ["contract_version", "scenario_sequence", "record_type", "payload"],
      "properties": {
        "contract_version": { "const": "16" },
        "scenario_sequence": { "const": "1" },
        "record_type": { "const": "scenario_header" },
        "payload": { "$ref": "#/$defs/headerPayload" }
      }
    },
    "sliceRecord": {
      "type": "object",
      "additionalProperties": false,
      "required": ["contract_version", "scenario_sequence", "record_type", "payload"],
      "properties": {
        "contract_version": { "const": "16" },
        "scenario_sequence": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/sequence" },
        "record_type": { "const": "market_slice" },
        "payload": { "$ref": "#/$defs/slicePayload" }
      }
    },
    "endRecord": {
      "type": "object",
      "additionalProperties": false,
      "required": ["contract_version", "scenario_sequence", "record_type", "payload"],
      "properties": {
        "contract_version": { "const": "16" },
        "scenario_sequence": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/sequence" },
        "record_type": { "const": "scenario_end" },
        "payload": {
          "type": "object",
          "additionalProperties": false,
          "required": ["slice_count"],
          "properties": { "slice_count": { "type": "string", "pattern": "^(?:0|[1-9][0-9]*)$" } }
        }
      }
    },
    "headerPayload": {
      "type": "object",
      "additionalProperties": false,
      "required": ["metadata", "run_id", "base_currency", "initial_portfolio", "instruments", "venue_calendars", "risk", "execution", "financing", "settlement", "max_internal_events"],
      "properties": {
        "metadata": { "type": "object" },
        "run_id": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/identifier" },
        "base_currency": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/identifier" },
        "initial_portfolio": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/initialPortfolio" },
        "instruments": { "type": "array", "minItems": 1, "maxItems": 4096, "items": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/instrument" } },
        "venue_calendars": { "type": "array", "minItems": 1, "items": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/venueCalendar" } },
        "risk": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/risk" },
        "execution": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/execution" },
        "financing": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/financing" },
        "settlement": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/settlement" },
        "max_internal_events": { "type": "integer", "minimum": 1, "maximum": 100000 }
      }
    },
    "slicePayload": {
      "type": "object",
      "additionalProperties": false,
      "required": ["market_slice", "intents"],
      "properties": {
        "market_slice": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/marketSlice" },
        "intents": { "type": "array", "maxItems": 4096, "items": { "$ref": "https://github.com/fallblu/trading-engine/contracts/v16/scenario.schema.json#/$defs/intent" } }
      }
    }
  }
}