diff --git a/src/utils/contents.js b/src/utils/contents.js
index f1d5ddef..3c167ff7 100644
--- a/src/utils/contents.js
+++ b/src/utils/contents.js
@@ -79,6 +79,11 @@ const PROMPT_DEFINITIONS = {
     title: 'Claude Code Compact System Prompt Agent SDK2',
     text: "You are Claude Code, Anthropic's official CLI for Claude, running within the Claude Agent SDK."
   },
+  claudeOtherSystemPrompt5: {
+    category: 'system',
+    title: 'Claude CLI Billing Header',
+    text: 'x-anthropic-billing-header: cc_version=2.1.15.c5a; cc_entrypoint=cli'
+  },
   claudeOtherSystemPromptCompact: {
     category: 'system',
     title: 'Claude Code Compact System Prompt',
diff --git a/src/validators/clients/claudeCodeValidator.js b/src/validators/clients/claudeCodeValidator.js
index 4788f178..8647ce48 100644
--- a/src/validators/clients/claudeCodeValidator.js
+++ b/src/validators/clients/claudeCodeValidator.js
@@ -59,7 +59,7 @@ class ClaudeCodeValidator {
       typeof customThreshold === 'number' && Number.isFinite(customThreshold)
         ? customThreshold
         : SYSTEM_PROMPT_THRESHOLD
-
+    
     for (const entry of systemEntries) {
       const rawText = typeof entry?.text === 'string' ? entry.text : ''
       const { bestScore, templateId, maskedRaw } = bestSimilarityByTemplates(rawText)