stats

type AgentStats struct {
	TotalPromptTokens     int
	TotalCompletionTokens int
	TotalCacheReadTokens  int
	TotalAgentTime        time.Duration
	TotalLLMTime          time.Duration
	TotalToolTime         time.Duration
	Steps                 int // Number of LLM iterations
	MaxContextUsed        int
	TotalCost             float64
	CacheDiscount         float64

	// Timing stats from LLM server (in milliseconds)
	TotalPromptMS     float64
	TotalGenerationMS float64

	// Backtrack stats (discarded requests)
	DiscardedPromptTokens     int
	DiscardedCompletionTokens int
	DiscardedCost             float64
	BacktrackCount            int
}

type AgentStatsJSON struct {
	Tokens struct {
		Prompt     int `json:"prompt"`
		Completion int `json:"completion"`
		CacheRead  int `json:"cache_read"`
	} `json:"tokens"`
	Timing struct {
		TotalAgentSeconds float64 `json:"total_agent_seconds"`
		LLMSeconds        float64 `json:"llm_seconds"`
		ToolSeconds       float64 `json:"tool_seconds"`
		PromptMS          float64 `json:"prompt_ms"`
		GenerationMS      float64 `json:"generation_ms"`
	} `json:"timing"`
	Steps          int `json:"steps"`
	MaxContextUsed int `json:"max_context_used"`
	Cost           struct {
		CacheDiscountUSD float64 `json:"cache_discount_usd"`
		TotalCostUSD     float64 `json:"total_cost_usd"`
	} `json:"cost"`
	Backtrack struct {
		DiscardedPromptTokens     int     `json:"discarded_prompt_tokens,omitempty"`
		DiscardedCompletionTokens int     `json:"discarded_completion_tokens,omitempty"`
		DiscardedCostUSD          float64 `json:"discarded_cost_usd,omitempty"`
		BacktrackCount            int     `json:"backtrack_count,omitempty"`
	} `json:"backtrack,omitempty"`
}