diff --git a/internal/runtime/executor/logging_helpers.go b/internal/runtime/executor/logging_helpers.go
index 26931f53..90532772 100644
--- a/internal/runtime/executor/logging_helpers.go
+++ b/internal/runtime/executor/logging_helpers.go
@@ -304,11 +304,7 @@ func formatAuthInfo(info upstreamRequestLog) string {
 			parts = append(parts, "type=api_key")
 		}
 	case "oauth":
-		if authValue != "" {
-			parts = append(parts, fmt.Sprintf("type=oauth account=%s", authValue))
-		} else {
-			parts = append(parts, "type=oauth")
-		}
+		parts = append(parts, "type=oauth")
 	default:
 		if authType != "" {
 			if authValue != "" {
diff --git a/internal/translator/antigravity/claude/antigravity_claude_request.go b/internal/translator/antigravity/claude/antigravity_claude_request.go
index 2287bccc..d5064c3c 100644
--- a/internal/translator/antigravity/claude/antigravity_claude_request.go
+++ b/internal/translator/antigravity/claude/antigravity_claude_request.go
@@ -14,7 +14,6 @@ import (
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/cache"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/translator/gemini/common"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
-	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -136,14 +135,14 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 						if sessionID != "" && thinkingText != "" {
 							if cachedSig := cache.GetCachedSignature(sessionID, thinkingText); cachedSig != "" {
 								signature = cachedSig
-								log.Debugf("Using cached signature for thinking block")
+								// log.Debugf("Using cached signature for thinking block")
 							}
 						}
 
 						// Fallback to client signature only if cache miss and client signature is valid
 						if signature == "" && cache.HasValidSignature(clientSignature) {
 							signature = clientSignature
-							log.Debugf("Using client-provided signature for thinking block")
+							// log.Debugf("Using client-provided signature for thinking block")
 						}
 
 						// Store for subsequent tool_use in the same message
@@ -158,8 +157,7 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 						// Claude requires assistant messages to start with thinking blocks when thinking is enabled
 						// Converting to text would break this requirement
 						if isUnsigned {
-							// TypeScript plugin approach: drop unsigned thinking blocks entirely
-							log.Debugf("Dropping unsigned thinking block (no valid signature)")
+							// log.Debugf("Dropping unsigned thinking block (no valid signature)")
 							continue
 						}
 
@@ -183,7 +181,6 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 					} else if contentTypeResult.Type == gjson.String && contentTypeResult.String() == "tool_use" {
 						// NOTE: Do NOT inject dummy thinking blocks here.
 						// Antigravity API validates signatures, so dummy values are rejected.
-						// The TypeScript plugin removes unsigned thinking blocks instead of injecting dummies.
 
 						functionName := contentResult.Get("name").String()
 						argsResult := contentResult.Get("input")
diff --git a/internal/translator/antigravity/claude/antigravity_claude_response.go b/internal/translator/antigravity/claude/antigravity_claude_response.go
index 875e54a7..1672a835 100644
--- a/internal/translator/antigravity/claude/antigravity_claude_response.go
+++ b/internal/translator/antigravity/claude/antigravity_claude_response.go
@@ -136,11 +136,11 @@ func ConvertAntigravityResponseToClaude(_ context.Context, _ string, originalReq
 				// Process thinking content (internal reasoning)
 				if partResult.Get("thought").Bool() {
 					if thoughtSignature := partResult.Get("thoughtSignature"); thoughtSignature.Exists() && thoughtSignature.String() != "" {
-						log.Debug("Branch: signature_delta")
+						// log.Debug("Branch: signature_delta")
 
 						if params.SessionID != "" && params.CurrentThinkingText.Len() > 0 {
 							cache.CacheSignature(params.SessionID, params.CurrentThinkingText.String(), thoughtSignature.String())
-							log.Debugf("Cached signature for thinking block (sessionID=%s, textLen=%d)", params.SessionID, params.CurrentThinkingText.Len())
+							// log.Debugf("Cached signature for thinking block (sessionID=%s, textLen=%d)", params.SessionID, params.CurrentThinkingText.Len())
 							params.CurrentThinkingText.Reset()
 						}
 
diff --git a/sdk/cliproxy/auth/conductor.go b/sdk/cliproxy/auth/conductor.go
index f35cc416..689d3a21 100644
--- a/sdk/cliproxy/auth/conductor.go
+++ b/sdk/cliproxy/auth/conductor.go
@@ -1609,7 +1609,6 @@ func formatOauthIdentity(auth *Auth, provider string, accountInfo string) string
 	if auth == nil {
 		return ""
 	}
-	authIndex := auth.EnsureIndex()
 	// Prefer the auth's provider when available.
 	providerName := strings.TrimSpace(auth.Provider)
 	if providerName == "" {
@@ -1631,16 +1630,10 @@ func formatOauthIdentity(auth *Auth, provider string, accountInfo string) string
 	if authFile != "" {
 		parts = append(parts, "auth_file="+authFile)
 	}
-	if authIndex != "" {
-		parts = append(parts, "auth_index="+authIndex)
-	}
 	if len(parts) == 0 {
 		return accountInfo
 	}
-	if accountInfo == "" {
-		return strings.Join(parts, " ")
-	}
-	return strings.Join(parts, " ") + " account=" + strconv.Quote(accountInfo)
+	return strings.Join(parts, " ")
 }
 
 // InjectCredentials delegates per-provider HTTP request preparation when supported.