Merge branch 'master' of https://github.com/decolua/9router

# Conflicts:
#	open-sse/utils/usageTracking.js

open-sse/utils/usageTracking.js

@@ -298,3 +298,37 @@ export function estimateUsage(body, contentLength, targetFormat = FORMATS.OPENAI
     targetFormat
   );
 }
+/**
+ * Log usage with cache info (green color)
+ */
+export function logUsage(provider, usage, model = null, connectionId = null, apiKey = null) {
+  if (!usage || typeof usage !== "object") return;
+
+  const p = provider?.toUpperCase() || "UNKNOWN";
+
+  // Support both formats:
+  // - OpenAI: prompt_tokens, completion_tokens
+  // - Claude: input_tokens, output_tokens
+  const inTokens = usage?.prompt_tokens || usage?.input_tokens || 0;
+  const outTokens = usage?.completion_tokens || usage?.output_tokens || 0;
+  const accountPrefix = connectionId ? connectionId.slice(0, 8) + "..." : "unknown";
+
+  let msg = `[${getTimeString()}] 📊 ${COLORS.green}[USAGE] ${p} | in=${inTokens} | out=${outTokens} | account=${accountPrefix}${COLORS.reset}`;
+
+  // Add estimated flag if present
+  if (usage.estimated) {
+    msg += ` ${COLORS.yellow}(estimated)${COLORS.reset}`;
+  }
+
+  // Add cache info if present (unified from different formats)
+  const cacheRead = usage.cache_read_input_tokens || usage.cached_tokens || usage.prompt_tokens_details?.cached_tokens;
+  if (cacheRead) msg += ` | cache_read=${cacheRead}`;
+
+  const cacheCreation = usage.cache_creation_input_tokens;
+  if (cacheCreation) msg += ` | cache_create=${cacheCreation}`;
+
+  const reasoning = usage.reasoning_tokens;
+  if (reasoning) msg += ` | reasoning=${reasoning}`;
+
+  console.log(msg);
+}