dexcost 0.9.0

Agent Unit Economics SDK for Rust — track end-to-end business-task costs for AI agents.
Documentation 
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{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://dexcost.io/schemas/dexcost-event.v1.json",
  "title": "Dexcost Event v1",
  "description": "Standard Event Schema v1 — Event payload. Represents a single cost-generating event within a task.",
  "type": "object",
  "required": [
    "event_id",
    "task_id",
    "event_type",
    "occurred_at",
    "cost_usd",
    "cost_confidence",
    "schema_version"
  ],
  "additionalProperties": false,
  "properties": {
    "event_id": {
      "type": "string",
      "format": "uuid",
      "description": "Unique identifier for the event."
    },
    "task_id": {
      "type": "string",
      "format": "uuid",
      "description": "UUID of the parent task this event belongs to."
    },
    "event_type": {
      "type": "string",
      "enum": ["llm_call", "external_cost", "compute_cost", "retry_marker", "network", "gpu_cost", "gpu_utilization_signal"],
      "description": "Discriminator for the event category."
    },
    "occurred_at": {
      "type": "string",
      "format": "date-time",
      "description": "ISO-8601 timestamp when the event occurred."
    },
    "cost_usd": {
      "type": "string",
      "pattern": "^-?\\d+(\\.\\d+)?$",
      "description": "Cost of this event in USD (Decimal as string)."
    },
    "cost_confidence": {
      "type": "string",
      "enum": ["exact", "computed", "estimated", "unknown"],
      "description": "How trustworthy the reported cost_usd value is."
    },
    "pricing_source": {
      "type": ["string", "null"],
      "description": "Where the cost_usd figure was derived from (litellm, tokencost, provider_response, manual)."
    },
    "pricing_version": {
      "type": ["string", "null"],
      "description": "Version of the pricing data used."
    },
    "service_name": {
      "type": ["string", "null"],
      "description": "Name of the service that generated this cost event."
    },
    "provider": {
      "type": ["string", "null"],
      "description": "LLM provider name (e.g. openai, anthropic). Null for non-LLM events."
    },
    "model": {
      "type": ["string", "null"],
      "description": "LLM model identifier (e.g. gpt-4o). Null for non-LLM events."
    },
    "input_tokens": {
      "type": ["integer", "null"],
      "minimum": 0,
      "description": "Input token count. Null for non-LLM events."
    },
    "output_tokens": {
      "type": ["integer", "null"],
      "minimum": 0,
      "description": "Output token count. Null for non-LLM events."
    },
    "cached_tokens": {
      "type": ["integer", "null"],
      "minimum": 0,
      "description": "Cached token count. Null for non-LLM events."
    },
    "latency_ms": {
      "type": ["integer", "null"],
      "minimum": 0,
      "description": "Latency in milliseconds. Null for non-LLM events."
    },
    "is_retry": {
      "type": "boolean",
      "description": "Whether this event is a retry of a previous event."
    },
    "retry_reason": {
      "type": ["string", "null"],
      "description": "Reason for the retry (rate_limit, timeout, parse_error, 5xx)."
    },
    "retry_of": {
      "type": ["string", "null"],
      "format": "uuid",
      "description": "UUID of the original event this is a retry of."
    },
    "details": {
      "type": "object",
      "description": "Extensible type-specific details."
    },
    "schema_version": {
      "type": "string",
      "const": "1",
      "description": "Schema version — always '1' for v1 payloads."
    }
  }
}