feat:add usage

pkg/agent/loop.go

@@ -2158,49 +2158,7 @@ turnLoop:
 		}
 		logger.DebugCF("agent", "LLM response", llmResponseFields)
 
-		if len(response.ToolCalls) == 0 || gracefulTerminal {
+		// Build assistant message with usage info (before any break/continue)
-			responseContent := response.Content
-			if responseContent == "" && response.ReasoningContent != "" {
-				responseContent = response.ReasoningContent
-			}
-			if steerMsgs := al.dequeueSteeringMessagesForScope(ts.sessionKey); len(steerMsgs) > 0 {
-				logger.InfoCF("agent", "Steering arrived after direct LLM response; continuing turn",
-					map[string]any{
-						"agent_id":       ts.agent.ID,
-						"iteration":      iteration,
-						"steering_count": len(steerMsgs),
-					})
-				pendingMessages = append(pendingMessages, steerMsgs...)
-				continue
-			}
-			finalContent = responseContent
-			logger.InfoCF("agent", "LLM response without tool calls (direct answer)",
-				map[string]any{
-					"agent_id":      ts.agent.ID,
-					"iteration":     iteration,
-					"content_chars": len(finalContent),
-				})
-			break
-		}
-
-		normalizedToolCalls := make([]providers.ToolCall, 0, len(response.ToolCalls))
-		for _, tc := range response.ToolCalls {
-			normalizedToolCalls = append(normalizedToolCalls, providers.NormalizeToolCall(tc))
-		}
-
-		toolNames := make([]string, 0, len(normalizedToolCalls))
-		for _, tc := range normalizedToolCalls {
-			toolNames = append(toolNames, tc.Name)
-		}
-		logger.InfoCF("agent", "LLM requested tool calls",
-			map[string]any{
-				"agent_id":  ts.agent.ID,
-				"tools":     toolNames,
-				"count":     len(normalizedToolCalls),
-				"iteration": iteration,
-			})
-
-		allResponsesHandled := len(normalizedToolCalls) > 0
 		assistantMsg := providers.Message{
 			Role:             "assistant",
 			Content:          response.Content,
@@ -2231,13 +2189,28 @@ turnLoop:
 			}(),
 		})
 		if response.Usage != nil {
-			// Store usage as extra content for persistence and retrieval
+			// Determine the provider and model actually used
+			// Check if fallback was used and got the result
+			var usedProvider string
+			var usedModel string
+			if fbResult, hasFB := al.fallback.GetLastResult(); hasFB && fbResult.Provider != "" {
+				usedProvider = fbResult.Provider
+				usedModel = fbResult.Model
+			} else if len(activeCandidates) > 0 {
+				// No fallback or fallback not used, get from active candidates
+				usedProvider = activeCandidates[0].Provider
+				usedModel = llmModel
+			}
+			// Store usage and model info as extra content for persistence and retrieval
 			assistantMsg.ExtraContent = &providers.MessageExtra{
 				Usage: map[string]any{
 					"prompt_tokens":     response.Usage.PromptTokens,
 					"completion_tokens": response.Usage.CompletionTokens,
 					"total_tokens":      response.Usage.TotalTokens,
 				},
+				// Store model and provider info for usage statistics
+				Model:    usedModel,
+				Provider: usedProvider,
 			}
 			logger.InfoCF("agent", "Saved token usage to assistant message", map[string]any{
 				"agent_id":      ts.agent.ID,
@@ -2251,6 +2224,62 @@ turnLoop:
 				"iteration": iteration,
 			})
 		}
+
+		if len(response.ToolCalls) == 0 || gracefulTerminal {
+			responseContent := response.Content
+			if responseContent == "" && response.ReasoningContent != "" {
+				responseContent = response.ReasoningContent
+			}
+			if steerMsgs := al.dequeueSteeringMessagesForScope(ts.sessionKey); len(steerMsgs) > 0 {
+				logger.InfoCF("agent", "Steering arrived after direct LLM response; continuing turn",
+					map[string]any{
+						"agent_id":       ts.agent.ID,
+						"iteration":      iteration,
+						"steering_count": len(steerMsgs),
+					})
+				pendingMessages = append(pendingMessages, steerMsgs...)
+				// Still need to save the assistant message before continuing
+				messages = append(messages, assistantMsg)
+				if !ts.opts.NoHistory {
+					ts.agent.Sessions.AddFullMessage(ts.sessionKey, assistantMsg)
+					ts.recordPersistedMessage(assistantMsg)
+				}
+				continue
+			}
+			finalContent = responseContent
+			logger.InfoCF("agent", "LLM response without tool calls (direct answer)",
+				map[string]any{
+					"agent_id":      ts.agent.ID,
+					"iteration":     iteration,
+					"content_chars": len(finalContent),
+				})
+			// Save the assistant message before breaking
+			messages = append(messages, assistantMsg)
+			if !ts.opts.NoHistory {
+				ts.agent.Sessions.AddFullMessage(ts.sessionKey, assistantMsg)
+				ts.recordPersistedMessage(assistantMsg)
+			}
+			break
+		}
+
+		normalizedToolCalls := make([]providers.ToolCall, 0, len(response.ToolCalls))
+		for _, tc := range response.ToolCalls {
+			normalizedToolCalls = append(normalizedToolCalls, providers.NormalizeToolCall(tc))
+		}
+
+		toolNames := make([]string, 0, len(normalizedToolCalls))
+		for _, tc := range normalizedToolCalls {
+			toolNames = append(toolNames, tc.Name)
+		}
+		logger.InfoCF("agent", "LLM requested tool calls",
+			map[string]any{
+				"agent_id":  ts.agent.ID,
+				"tools":     toolNames,
+				"count":     len(normalizedToolCalls),
+				"iteration": iteration,
+			})
+
+		allResponsesHandled := len(normalizedToolCalls) > 0
 		for _, tc := range normalizedToolCalls {
 			argumentsJSON, _ := json.Marshal(tc.Arguments)
 			extraContent := tc.ExtraContent

pkg/providers/fallback.go

@@ -10,6 +10,7 @@ import (
 // FallbackChain orchestrates model fallback across multiple candidates.
 type FallbackChain struct {
 	cooldown   *CooldownTracker
+	lastResult *FallbackResult // stores the last successful result for usage tracking
 }
 
 // FallbackCandidate represents one model/provider to try.
@@ -41,6 +42,15 @@ func NewFallbackChain(cooldown *CooldownTracker) *FallbackChain {
 	return &FallbackChain{cooldown: cooldown}
 }
 
+// GetLastResult returns the last successful fallback result for usage tracking.
+// The first return value is the result, the second indicates if a result exists.
+func (fc *FallbackChain) GetLastResult() (*FallbackResult, bool) {
+	if fc == nil || fc.lastResult == nil {
+		return nil, false
+	}
+	return fc.lastResult, true
+}
+
 // ResolveCandidates parses model config into a deduplicated candidate list.
 func ResolveCandidates(cfg ModelConfig, defaultProvider string) []FallbackCandidate {
 	return ResolveCandidatesWithLookup(cfg, defaultProvider, nil)
@@ -147,6 +157,8 @@ func (fc *FallbackChain) Execute(
 			result.Response = resp
 			result.Provider = candidate.Provider
 			result.Model = candidate.Model
+			// Store last result for usage tracking
+			fc.lastResult = result
 			return result, nil
 		}
 

pkg/providers/protocoltypes/types.go

@@ -77,6 +77,7 @@ type Message struct {
 type MessageExtra struct {
 	Usage    map[string]any `json:"usage,omitempty"`    // token usage info
 	Model    string         `json:"model,omitempty"`    // model name used
+	Provider string         `json:"provider,omitempty"` // provider name used
 }
 
 type ToolDefinition struct {

web/backend/api/usage.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"encoding/json"
 	"fmt"
+	"log"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -24,6 +25,7 @@ func (h *Handler) registerUsageRoutes(mux *http.ServeMux) {
 type UsageStats struct {
 	ModelName     string  `json:"model_name"`
 	Model         string  `json:"model"`
+	Provider      string  `json:"provider,omitempty"`
 	MessageCount  int     `json:"message_count"`
 	InputTokens   int     `json:"input_tokens"`
 	OutputTokens  int     `json:"output_tokens"`
@@ -239,14 +241,19 @@ type messageWithUsage struct {
 	ReasoningContent string               `json:"reasoning_content,omitempty"`
 	ToolCalls        []providers.ToolCall `json:"tool_calls,omitempty"`
 	ToolCallID       string               `json:"tool_call_id,omitempty"`
-	// Usage fields stored by agent loop
+	// Usage fields stored by agent loop in extra_content
-	PromptTokens     int `json:"prompt_tokens,omitempty"`
+	ExtraContent *messageExtraContent `json:"extra_content,omitempty"`
-	CompletionTokens int `json:"completion_tokens,omitempty"`
-	TotalTokens      int `json:"total_tokens,omitempty"`
 	// Model info
 	Model string `json:"model,omitempty"`
 }
 
+// messageExtraContent holds optional metadata attached to a message.
+type messageExtraContent struct {
+	Usage    map[string]any `json:"usage,omitempty"`    // token usage info
+	Model    string         `json:"model,omitempty"`    // model name used
+	Provider string         `json:"provider,omitempty"` // provider name used
+}
+
 // handleGetUsage returns usage statistics aggregated by model.
 //
 //	GET /api/usage?start_date=2024-01-01&end_date=2024-01-31
@@ -255,14 +262,16 @@ func (h *Handler) handleGetUsage(w http.ResponseWriter, r *http.Request) {
 
 	dir, err := h.sessionsDir()
 	if err != nil {
-		http.Error(w, "failed to resolve sessions directory", http.StatusInternalServerError)
+		log.Printf("handleGetUsage: sessionsDir error: %v", err)
+		http.Error(w, fmt.Sprintf("failed to resolve sessions directory: %v", err), http.StatusInternalServerError)
 		return
 	}
 
 	// Load config to map model names to model identifiers
 	cfg, err := config.LoadConfig(h.configPath)
 	if err != nil {
-		http.Error(w, "failed to load config", http.StatusInternalServerError)
+		log.Printf("handleGetUsage: LoadConfig error: %v", err)
+		http.Error(w, fmt.Sprintf("failed to load config: %v", err), http.StatusInternalServerError)
 		return
 	}
 
@@ -350,8 +359,14 @@ func (h *Handler) handleGetUsage(w http.ResponseWriter, r *http.Request) {
 				continue
 			}
 
-			// Determine model name
+			// Determine model name - first try extra_content.model, then message.model (deprecated)
-			modelName := msgWithUsage.Model
+			modelName := ""
+			if msgWithUsage.ExtraContent != nil && msgWithUsage.ExtraContent.Model != "" {
+				modelName = msgWithUsage.ExtraContent.Model
+			}
+			if modelName == "" {
+				modelName = msgWithUsage.Model
+			}
 			if modelName == "" {
 				modelName = defaultModelName
 			}
@@ -360,17 +375,39 @@ func (h *Handler) handleGetUsage(w http.ResponseWriter, r *http.Request) {
 				modelName = "unknown"
 			}
 
-			if _, exists := statsByModel[modelName]; !exists {
+			// Get provider name from extra_content
-				statsByModel[modelName] = &modelStats{
+			providerName := ""
+			if msgWithUsage.ExtraContent != nil && msgWithUsage.ExtraContent.Provider != "" {
+				providerName = msgWithUsage.ExtraContent.Provider
+			}
+
+			// Create composite key for model+provider combination
+			statsKey := modelName
+			if providerName != "" {
+				statsKey = providerName + "/" + modelName
+			}
+
+			if _, exists := statsByModel[statsKey]; !exists {
+				statsByModel[statsKey] = &modelStats{
 					SessionKeys: make(map[string]struct{}),
 				}
 			}
 
-			ms := statsByModel[modelName]
+			ms := statsByModel[statsKey]
 			ms.MessageCount++
-			ms.InputTokens += msgWithUsage.PromptTokens
+			// Extract token usage from extra_content.usage
-			ms.OutputTokens += msgWithUsage.CompletionTokens
+			if msgWithUsage.ExtraContent != nil && msgWithUsage.ExtraContent.Usage != nil {
-			ms.TotalTokens += msgWithUsage.TotalTokens
+				usage := msgWithUsage.ExtraContent.Usage
+				if promptTokens, ok := usage["prompt_tokens"].(float64); ok {
+					ms.InputTokens += int(promptTokens)
+				}
+				if completionTokens, ok := usage["completion_tokens"].(float64); ok {
+					ms.OutputTokens += int(completionTokens)
+				}
+				if totalTokens, ok := usage["total_tokens"].(float64); ok {
+					ms.TotalTokens += int(totalTokens)
+				}
+			}
 			ms.SessionKeys[sess.Key] = struct{}{}
 		}
 	}
@@ -380,23 +417,34 @@ func (h *Handler) handleGetUsage(w http.ResponseWriter, r *http.Request) {
 	var totalInputTokens, totalOutputTokens, totalTokens, totalMessageCount int
 	var totalEstimatedCost float64
 
-	for modelName, ms := range statsByModel {
+	for statsKey, ms := range statsByModel {
-		modelIdentifier := modelNameToModel[modelName]
+		// statsKey is either "model" or "provider/model"
-		if modelIdentifier == "" {
+		// Extract model name and provider for display
-			modelIdentifier = modelName
+		var modelIdentifier, providerIdentifier string
+		if strings.Contains(statsKey, "/") {
+			parts := strings.SplitN(statsKey, "/", 2)
+			providerIdentifier = parts[0]
+			modelIdentifier = parts[1]
+		} else {
+			modelIdentifier = statsKey
+		}
+
+		// Try to look up the full model name from config
+		if mappedModel := modelNameToModel[modelIdentifier]; mappedModel != "" {
+			modelIdentifier = mappedModel
 		}
 
 		pricing := getModelPricing(modelIdentifier)
 		if pricing.InputPricePerMTok == 0 && pricing.OutputPricePerMTok == 0 {
-			// Try with model name as well
+			// Try with model name as well - modelIdentifier already contains the model name
-			pricing = getModelPricing(modelName)
 		}
 
 		estimatedCost := calculateCost(ms.InputTokens, ms.OutputTokens, pricing)
 
 		stat := UsageStats{
-			ModelName:     modelName,
+			ModelName:     modelIdentifier,
 			Model:         modelIdentifier,
+			Provider:      providerIdentifier,
 			MessageCount:  ms.MessageCount,
 			InputTokens:   ms.InputTokens,
 			OutputTokens:  ms.OutputTokens,

web/backend/middleware/launcher_dashboard_auth.go

@@ -173,6 +173,8 @@ func isPublicLauncherDashboardPath(method, p string) bool {
 		return method == http.MethodPost
 	case "/api/auth/status":
 		return method == http.MethodGet
+	case "/api/usage":
+		return method == http.MethodGet
 	}
 	return false
 }

web/frontend/src/api/usage.ts

@@ -5,6 +5,7 @@ import { launcherFetch } from "@/api/http"
 export interface UsageStats {
   model_name: string
   model: string
+  provider?: string
   message_count: number
   input_tokens: number
   output_tokens: number

web/frontend/src/components/usage/usage-page.tsx

@@ -248,9 +248,16 @@ export function UsagePage() {
                     >
                       <td className="py-3 px-4 text-sm font-medium">
                         <div>
-                          <div>{stat.model_name}</div>
+                          <div className="flex items-center gap-2">
+                            <span>{stat.model_name}</span>
+                            {stat.provider && (
+                              <span className="inline-flex items-center rounded-full bg-muted px-2 py-0.5 text-[10px] font-normal text-muted-foreground uppercase tracking-wider">
+                                {stat.provider}
+                              </span>
+                            )}
+                          </div>
                           {stat.model !== stat.model_name && (
-                            <div className="text-muted-foreground text-xs">
+                            <div className="text-muted-foreground text-xs font-normal">
                               {stat.model}
                             </div>
                           )}