diff --git a/sdk/cliproxy/builder.go b/sdk/cliproxy/builder.go
index 152940a0..c7e187ee 100644
--- a/sdk/cliproxy/builder.go
+++ b/sdk/cliproxy/builder.go
@@ -214,7 +214,7 @@ func (b *Builder) Build() (*Service, error) {
 		if b.cfg != nil {
 			strategy = strings.ToLower(strings.TrimSpace(b.cfg.Routing.Strategy))
 			// Support both legacy ClaudeCodeSessionAffinity and new universal SessionAffinity
-			sessionAffinity = b.cfg.Routing.ClaudeCodeSessionAffinity || b.cfg.Routing.SessionAffinity
+			sessionAffinity = b.cfg.Routing.SessionAffinity
 			if ttlStr := strings.TrimSpace(b.cfg.Routing.SessionAffinityTTL); ttlStr != "" {
 				if parsed, err := time.ParseDuration(ttlStr); err == nil && parsed > 0 {
 					sessionAffinityTTL = parsed
diff --git a/sdk/cliproxy/service.go b/sdk/cliproxy/service.go
index 3459c055..6a94878d 100644
--- a/sdk/cliproxy/service.go
+++ b/sdk/cliproxy/service.go
@@ -483,7 +483,7 @@ func (s *Service) applyConfigUpdate(newCfg *config.Config) {
 	s.cfgMu.RLock()
 	if s.cfg != nil {
 		previousStrategy = strings.ToLower(strings.TrimSpace(s.cfg.Routing.Strategy))
-		previousSessionAffinity = s.cfg.Routing.ClaudeCodeSessionAffinity || s.cfg.Routing.SessionAffinity
+		previousSessionAffinity = s.cfg.Routing.SessionAffinity
 		previousSessionAffinityTTL = s.cfg.Routing.SessionAffinityTTL
 	}
 	s.cfgMu.RUnlock()
@@ -509,7 +509,7 @@ func (s *Service) applyConfigUpdate(newCfg *config.Config) {
 	previousStrategy = normalizeStrategy(previousStrategy)
 	nextStrategy = normalizeStrategy(nextStrategy)
 
-	nextSessionAffinity := newCfg.Routing.ClaudeCodeSessionAffinity || newCfg.Routing.SessionAffinity
+	nextSessionAffinity := newCfg.Routing.SessionAffinity
 	nextSessionAffinityTTL := newCfg.Routing.SessionAffinityTTL
 
 	selectorChanged := previousStrategy != nextStrategy ||