diff --git a/README.md b/README.md
index 9349b81f..3d270081 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ The Plus release stays in lockstep with the mainline features.
 
 ## Differences from the Mainline
 
-[![z.ai](https://assets.router-for.me/english-5.png)](https://z.ai/subscribe?ic=8JVLJQFSKB)
+[![z.ai](https://assets.router-for.me/english-5-0.jpg)](https://z.ai/subscribe?ic=8JVLJQFSKB)
 
 ## New Features (Plus Enhanced)
 
diff --git a/README_CN.md b/README_CN.md
index 7ce7ebc3..8769f062 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -10,7 +10,7 @@
 
 ## 与主线版本版本差异
 
-[![bigmodel.cn](https://assets.router-for.me/chinese-5.png)](https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII)
+[![bigmodel.cn](https://assets.router-for.me/chinese-5-0.jpg)](https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII)
 
 ## 新增功能 (Plus 增强版)
 
diff --git a/internal/api/handlers/management/auth_files.go b/internal/api/handlers/management/auth_files.go
index 351133d5..992d13e6 100644
--- a/internal/api/handlers/management/auth_files.go
+++ b/internal/api/handlers/management/auth_files.go
@@ -16,6 +16,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"runtime"
 	"sort"
 	"strconv"
 	"strings"
@@ -698,17 +699,20 @@ func (h *Handler) authIDForPath(path string) string {
 	if path == "" {
 		return ""
 	}
-	if h == nil || h.cfg == nil {
-		return path
+	id := path
+	if h != nil && h.cfg != nil {
+		authDir := strings.TrimSpace(h.cfg.AuthDir)
+		if authDir != "" {
+			if rel, errRel := filepath.Rel(authDir, path); errRel == nil && rel != "" {
+				id = rel
+			}
+		}
 	}
-	authDir := strings.TrimSpace(h.cfg.AuthDir)
-	if authDir == "" {
-		return path
+	// On Windows, normalize ID casing to avoid duplicate auth entries caused by case-insensitive paths.
+	if runtime.GOOS == "windows" {
+		id = strings.ToLower(id)
 	}
-	if rel, err := filepath.Rel(authDir, path); err == nil && rel != "" {
-		return rel
-	}
-	return path
+	return id
 }
 
 func (h *Handler) registerAuthFromFile(ctx context.Context, path string, data []byte) error {
diff --git a/internal/translator/antigravity/claude/antigravity_claude_request.go b/internal/translator/antigravity/claude/antigravity_claude_request.go
index c4e07b6a..35387488 100644
--- a/internal/translator/antigravity/claude/antigravity_claude_request.go
+++ b/internal/translator/antigravity/claude/antigravity_claude_request.go
@@ -441,9 +441,19 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 				out, _ = sjson.Set(out, "request.generationConfig.thinkingConfig.includeThoughts", true)
 			}
 		case "adaptive", "auto":
-			// Keep adaptive/auto as a high level sentinel; ApplyThinking resolves it
-			// to model-specific max capability.
-			out, _ = sjson.Set(out, "request.generationConfig.thinkingConfig.thinkingLevel", "high")
+			// Adaptive/auto thinking:
+			// - If output_config.effort is present, pass it through as thinkingLevel.
+			// - Otherwise, default to "high".
+			// ApplyThinking later normalizes/clamps and may convert level → budget per target model.
+			effort := ""
+			if v := gjson.GetBytes(rawJSON, "output_config.effort"); v.Exists() && v.Type == gjson.String {
+				effort = strings.ToLower(strings.TrimSpace(v.String()))
+			}
+			if effort != "" {
+				out, _ = sjson.Set(out, "request.generationConfig.thinkingConfig.thinkingLevel", effort)
+			} else {
+				out, _ = sjson.Set(out, "request.generationConfig.thinkingConfig.thinkingLevel", "high")
+			}
 			out, _ = sjson.Set(out, "request.generationConfig.thinkingConfig.includeThoughts", true)
 		}
 	}
diff --git a/internal/watcher/synthesizer/file.go b/internal/watcher/synthesizer/file.go
index 4e053117..ea96118b 100644
--- a/internal/watcher/synthesizer/file.go
+++ b/internal/watcher/synthesizer/file.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strconv"
 	"strings"
 	"time"
@@ -72,6 +73,10 @@ func (s *FileSynthesizer) Synthesize(ctx *SynthesisContext) ([]*coreauth.Auth, e
 		if rel, errRel := filepath.Rel(ctx.AuthDir, full); errRel == nil && rel != "" {
 			id = rel
 		}
+		// On Windows, normalize ID casing to avoid duplicate auth entries caused by case-insensitive paths.
+		if runtime.GOOS == "windows" {
+			id = strings.ToLower(id)
+		}
 
 		proxyURL := ""
 		if p, ok := metadata["proxy_url"].(string); ok {
diff --git a/sdk/auth/filestore.go b/sdk/auth/filestore.go
index 9e5a2ddb..794ea513 100644
--- a/sdk/auth/filestore.go
+++ b/sdk/auth/filestore.go
@@ -10,6 +10,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
@@ -266,14 +267,17 @@ func (s *FileTokenStore) readAuthFile(path, baseDir string) (*cliproxyauth.Auth,
 }
 
 func (s *FileTokenStore) idFor(path, baseDir string) string {
-	if baseDir == "" {
-		return path
+	id := path
+	if baseDir != "" {
+		if rel, errRel := filepath.Rel(baseDir, path); errRel == nil && rel != "" {
+			id = rel
+		}
 	}
-	rel, err := filepath.Rel(baseDir, path)
-	if err != nil {
-		return path
+	// On Windows, normalize ID casing to avoid duplicate auth entries caused by case-insensitive paths.
+	if runtime.GOOS == "windows" {
+		id = strings.ToLower(id)
 	}
-	return rel
+	return id
 }
 
 func (s *FileTokenStore) resolveAuthPath(auth *cliproxyauth.Auth) (string, error) {
diff --git a/sdk/cliproxy/auth/conductor.go b/sdk/cliproxy/auth/conductor.go
index 1b14d4c4..6e89adcb 100644
--- a/sdk/cliproxy/auth/conductor.go
+++ b/sdk/cliproxy/auth/conductor.go
@@ -463,9 +463,14 @@ func (m *Manager) Update(ctx context.Context, auth *Auth) (*Auth, error) {
 		return nil, nil
 	}
 	m.mu.Lock()
-	if existing, ok := m.auths[auth.ID]; ok && existing != nil && !auth.indexAssigned && auth.Index == "" {
-		auth.Index = existing.Index
-		auth.indexAssigned = existing.indexAssigned
+	if existing, ok := m.auths[auth.ID]; ok && existing != nil {
+		if !auth.indexAssigned && auth.Index == "" {
+			auth.Index = existing.Index
+			auth.indexAssigned = existing.indexAssigned
+		}
+		if len(auth.ModelStates) == 0 && len(existing.ModelStates) > 0 {
+			auth.ModelStates = existing.ModelStates
+		}
 	}
 	auth.EnsureIndex()
 	m.auths[auth.ID] = auth.Clone()
diff --git a/sdk/cliproxy/auth/conductor_update_test.go b/sdk/cliproxy/auth/conductor_update_test.go
new file mode 100644
index 00000000..f058f517
--- /dev/null
+++ b/sdk/cliproxy/auth/conductor_update_test.go
@@ -0,0 +1,49 @@
+package auth
+
+import (
+	"context"
+	"testing"
+)
+
+func TestManager_Update_PreservesModelStates(t *testing.T) {
+	m := NewManager(nil, nil, nil)
+
+	model := "test-model"
+	backoffLevel := 7
+
+	if _, errRegister := m.Register(context.Background(), &Auth{
+		ID:       "auth-1",
+		Provider: "claude",
+		Metadata: map[string]any{"k": "v"},
+		ModelStates: map[string]*ModelState{
+			model: {
+				Quota: QuotaState{BackoffLevel: backoffLevel},
+			},
+		},
+	}); errRegister != nil {
+		t.Fatalf("register auth: %v", errRegister)
+	}
+
+	if _, errUpdate := m.Update(context.Background(), &Auth{
+		ID:       "auth-1",
+		Provider: "claude",
+		Metadata: map[string]any{"k": "v2"},
+	}); errUpdate != nil {
+		t.Fatalf("update auth: %v", errUpdate)
+	}
+
+	updated, ok := m.GetByID("auth-1")
+	if !ok || updated == nil {
+		t.Fatalf("expected auth to be present")
+	}
+	if len(updated.ModelStates) == 0 {
+		t.Fatalf("expected ModelStates to be preserved")
+	}
+	state := updated.ModelStates[model]
+	if state == nil {
+		t.Fatalf("expected model state to be present")
+	}
+	if state.Quota.BackoffLevel != backoffLevel {
+		t.Fatalf("expected BackoffLevel to be %d, got %d", backoffLevel, state.Quota.BackoffLevel)
+	}
+}
diff --git a/sdk/cliproxy/service.go b/sdk/cliproxy/service.go
index 536d8ae7..3ffa2e07 100644
--- a/sdk/cliproxy/service.go
+++ b/sdk/cliproxy/service.go
@@ -301,6 +301,9 @@ func (s *Service) applyCoreAuthAddOrUpdate(ctx context.Context, auth *coreauth.A
 		auth.CreatedAt = existing.CreatedAt
 		auth.LastRefreshedAt = existing.LastRefreshedAt
 		auth.NextRefreshAfter = existing.NextRefreshAfter
+		if len(auth.ModelStates) == 0 && len(existing.ModelStates) > 0 {
+			auth.ModelStates = existing.ModelStates
+		}
 		op = "update"
 		_, err = s.coreManager.Update(ctx, auth)
 	} else {