feat(usage): add support for detailed token breakdown in usage tracking

- Introduced `CacheReadTokens` and `CacheCreationTokens` to enhance token breakdown.
- Refactored `parseClaudeUsageNode` for cleaner and reusable logic.
- Adjusted helpers and updated token calculations to align with the new fields.

Author: luispater

internal/redisqueue/plugin.go

@@ -49,11 +49,13 @@ func (p *usageQueuePlugin) HandleUsage(ctx context.Context, record coreusage.Rec
 	requestID := strings.TrimSpace(internallogging.GetRequestID(ctx))
 
 	tokens := tokenStats{
-		InputTokens:     record.Detail.InputTokens,
-		OutputTokens:    record.Detail.OutputTokens,
-		ReasoningTokens: record.Detail.ReasoningTokens,
-		CachedTokens:    record.Detail.CachedTokens,
-		TotalTokens:     record.Detail.TotalTokens,
+		InputTokens:         record.Detail.InputTokens,
+		OutputTokens:        record.Detail.OutputTokens,
+		ReasoningTokens:     record.Detail.ReasoningTokens,
+		CachedTokens:        record.Detail.CachedTokens,
+		CacheReadTokens:     record.Detail.CacheReadTokens,
+		CacheCreationTokens: record.Detail.CacheCreationTokens,
+		TotalTokens:         record.Detail.TotalTokens,
 	}
 	if tokens.TotalTokens == 0 {
 		tokens.TotalTokens = tokens.InputTokens + tokens.OutputTokens + tokens.ReasoningTokens
@@ -116,11 +118,13 @@ type requestDetail struct {
 }
 
 type tokenStats struct {
-	InputTokens     int64 `json:"input_tokens"`
-	OutputTokens    int64 `json:"output_tokens"`
-	ReasoningTokens int64 `json:"reasoning_tokens"`
-	CachedTokens    int64 `json:"cached_tokens"`
-	TotalTokens     int64 `json:"total_tokens"`
+	InputTokens         int64 `json:"input_tokens"`
+	OutputTokens        int64 `json:"output_tokens"`
+	ReasoningTokens     int64 `json:"reasoning_tokens"`
+	CachedTokens        int64 `json:"cached_tokens"`
+	CacheReadTokens     int64 `json:"cache_read_tokens"`
+	CacheCreationTokens int64 `json:"cache_creation_tokens"`
+	TotalTokens         int64 `json:"total_tokens"`
 }
 
 type failDetail struct {

internal/runtime/executor/helps/usage_helpers.go

@@ -116,6 +116,8 @@ func hasNonZeroTokenUsage(detail usage.Detail) bool {
 		detail.OutputTokens != 0 ||
 		detail.ReasoningTokens != 0 ||
 		detail.CachedTokens != 0 ||
+		detail.CacheReadTokens != 0 ||
+		detail.CacheCreationTokens != 0 ||
 		detail.TotalTokens != 0
 }
 
@@ -356,17 +358,7 @@ func ParseClaudeUsage(data []byte) usage.Detail {
 	if !usageNode.Exists() {
 		return usage.Detail{}
 	}
-	detail := usage.Detail{
-		InputTokens:  usageNode.Get("input_tokens").Int(),
-		OutputTokens: usageNode.Get("output_tokens").Int(),
-		CachedTokens: usageNode.Get("cache_read_input_tokens").Int(),
-	}
-	if detail.CachedTokens == 0 {
-		// fall back to creation tokens when read tokens are absent
-		detail.CachedTokens = usageNode.Get("cache_creation_input_tokens").Int()
-	}
-	detail.TotalTokens = detail.InputTokens + detail.OutputTokens
-	return detail
+	return parseClaudeUsageNode(usageNode)
 }
 
 func ParseClaudeStreamUsage(line []byte) (usage.Detail, bool) {
@@ -378,16 +370,24 @@ func ParseClaudeStreamUsage(line []byte) (usage.Detail, bool) {
 	if !usageNode.Exists() {
 		return usage.Detail{}, false
 	}
+	return parseClaudeUsageNode(usageNode), true
+}
+
+func parseClaudeUsageNode(usageNode gjson.Result) usage.Detail {
+	cacheReadTokens := usageNode.Get("cache_read_input_tokens").Int()
+	cacheCreationTokens := usageNode.Get("cache_creation_input_tokens").Int()
 	detail := usage.Detail{
-		InputTokens:  usageNode.Get("input_tokens").Int(),
-		OutputTokens: usageNode.Get("output_tokens").Int(),
-		CachedTokens: usageNode.Get("cache_read_input_tokens").Int(),
+		InputTokens:         usageNode.Get("input_tokens").Int(),
+		OutputTokens:        usageNode.Get("output_tokens").Int(),
+		CachedTokens:        cacheReadTokens,
+		CacheReadTokens:     cacheReadTokens,
+		CacheCreationTokens: cacheCreationTokens,
 	}
 	if detail.CachedTokens == 0 {
-		detail.CachedTokens = usageNode.Get("cache_creation_input_tokens").Int()
+		detail.CachedTokens = detail.CacheCreationTokens
 	}
 	detail.TotalTokens = detail.InputTokens + detail.OutputTokens
-	return detail, true
+	return detail
 }
 
 func parseGeminiFamilyUsageDetail(node gjson.Result) usage.Detail {

sdk/cliproxy/usage/manager.go

@@ -34,11 +34,13 @@ type Failure struct {
 
 // Detail holds the token usage breakdown.
 type Detail struct {
-	InputTokens     int64
-	OutputTokens    int64
-	ReasoningTokens int64
-	CachedTokens    int64
-	TotalTokens     int64
+	InputTokens         int64
+	OutputTokens        int64
+	ReasoningTokens     int64
+	CachedTokens        int64
+	CacheReadTokens     int64
+	CacheCreationTokens int64
+	TotalTokens         int64
 }
 
 type requestedModelAliasContextKey struct{}