{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ayagmar.github.io/llm-usage-metrics/events-line.v1.schema.json",
  "title": "llm-usage-metrics events export line (v1)",
  "description": "One JSONL line of llm-usage events output: a normalized usage event. Lines are not wrapped in the report envelope.",
  "allOf": [
    {
      "$ref": "https://ayagmar.github.io/llm-usage-metrics/report-common.v1.schema.json#/$defs/tokenBuckets"
    }
  ],
  "properties": {
    "source": {
      "description": "Source id the event was parsed from.",
      "type": "string"
    },
    "sessionId": {
      "description": "Normalized session identifier.",
      "type": "string"
    },
    "timestamp": {
      "description": "Normalized ISO 8601 event timestamp.",
      "type": "string"
    },
    "repoRoot": {
      "description": "Repository root attributed to the event; omitted when unknown.",
      "type": "string"
    },
    "provider": {
      "description": "Billing-entity provider; omitted when unknown.",
      "type": "string"
    },
    "model": {
      "description": "Normalized model identifier; omitted when unknown.",
      "type": "string"
    },
    "costUsd": {
      "description": "Cost in USD; omitted when pricing is unresolved.",
      "type": "number",
      "minimum": 0
    },
    "costMode": {
      "description": "Whether the cost came from the source (explicit) or from pricing (estimated).",
      "type": "string",
      "enum": ["explicit", "estimated"]
    }
  },
  "required": ["source", "sessionId", "timestamp", "costMode"],
  "unevaluatedProperties": false
}