feat(watcher): expand event handling for config and auth JSON updates

Refine `handleEvent` to support additional file system operations (Rename, Remove) for config and auth JSON files. Improve client update/removal logic with atomic file replacement handling and incremental processing for auth changes.

cmd/server/main.go

@@ -17,6 +17,7 @@ import (
 
 	"github.com/joho/godotenv"
 	configaccess "github.com/router-for-me/CLIProxyAPI/v6/internal/access/config_access"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/buildinfo"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/cmd"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/logging"
@@ -41,13 +42,16 @@ var (
 // init initializes the shared logger setup.
 func init() {
 	logging.SetupBaseLogger()
+	buildinfo.Version = Version
+	buildinfo.Commit = Commit
+	buildinfo.BuildDate = BuildDate
 }
 
 // main is the entry point of the application.
 // It parses command-line flags, loads configuration, and starts the appropriate
 // service based on the provided flags (login, codex-login, or server mode).
 func main() {
-	fmt.Printf("CLIProxyAPI Version: %s, Commit: %s, BuiltAt: %s\n", Version, Commit, BuildDate)
+	fmt.Printf("CLIProxyAPI Version: %s, Commit: %s, BuiltAt: %s\n", buildinfo.Version, buildinfo.Commit, buildinfo.BuildDate)
 
 	// Command-line flags to control the application's behavior.
 	var login bool
@@ -386,7 +390,7 @@ func main() {
 		log.Fatalf("failed to configure log output: %v", err)
 	}
 
-	log.Infof("CLIProxyAPI Version: %s, Commit: %s, BuiltAt: %s", Version, Commit, BuildDate)
+	log.Infof("CLIProxyAPI Version: %s, Commit: %s, BuiltAt: %s", buildinfo.Version, buildinfo.Commit, buildinfo.BuildDate)
 
 	// Set the log level based on the configuration.
 	util.SetLogLevel(cfg)

internal/api/handlers/management/auth_files.go

@@ -1031,6 +1031,22 @@ func (h *Handler) RequestGeminiCLIToken(c *gin.Context) {
 		}
 		fmt.Println("Authentication successful.")
 
+		if strings.EqualFold(requestedProjectID, "ALL") {
+			ts.Auto = false
+			projects, errAll := onboardAllGeminiProjects(ctx, gemClient, &ts)
+			if errAll != nil {
+				log.Errorf("Failed to complete Gemini CLI onboarding: %v", errAll)
+				oauthStatus[state] = "Failed to complete Gemini CLI onboarding"
+				return
+			}
+			if errVerify := ensureGeminiProjectsEnabled(ctx, gemClient, projects); errVerify != nil {
+				log.Errorf("Failed to verify Cloud AI API status: %v", errVerify)
+				oauthStatus[state] = "Failed to verify Cloud AI API status"
+				return
+			}
+			ts.ProjectID = strings.Join(projects, ",")
+			ts.Checked = true
+		} else {
 			if errEnsure := ensureGeminiProjectAndOnboard(ctx, gemClient, &ts, requestedProjectID); errEnsure != nil {
 				log.Errorf("Failed to complete Gemini CLI onboarding: %v", errEnsure)
 				oauthStatus[state] = "Failed to complete Gemini CLI onboarding"
@@ -1055,6 +1071,7 @@ func (h *Handler) RequestGeminiCLIToken(c *gin.Context) {
 				oauthStatus[state] = "Cloud AI API not enabled"
 				return
 			}
+		}
 
 		recordMetadata := map[string]any{
 			"email":      ts.Email,
@@ -1063,10 +1080,11 @@ func (h *Handler) RequestGeminiCLIToken(c *gin.Context) {
 			"checked":    ts.Checked,
 		}
 
+		fileName := geminiAuth.CredentialFileName(ts.Email, ts.ProjectID, true)
 		record := &coreauth.Auth{
-			ID:       fmt.Sprintf("gemini-%s-%s.json", ts.Email, ts.ProjectID),
+			ID:       fileName,
 			Provider: "gemini",
-			FileName: fmt.Sprintf("gemini-%s-%s.json", ts.Email, ts.ProjectID),
+			FileName: fileName,
 			Storage:  &ts,
 			Metadata: recordMetadata,
 		}
@@ -1459,6 +1477,57 @@ func ensureGeminiProjectAndOnboard(ctx context.Context, httpClient *http.Client,
 	return nil
 }
 
+func onboardAllGeminiProjects(ctx context.Context, httpClient *http.Client, storage *geminiAuth.GeminiTokenStorage) ([]string, error) {
+	projects, errProjects := fetchGCPProjects(ctx, httpClient)
+	if errProjects != nil {
+		return nil, fmt.Errorf("fetch project list: %w", errProjects)
+	}
+	if len(projects) == 0 {
+		return nil, fmt.Errorf("no Google Cloud projects available for this account")
+	}
+	activated := make([]string, 0, len(projects))
+	seen := make(map[string]struct{}, len(projects))
+	for _, project := range projects {
+		candidate := strings.TrimSpace(project.ProjectID)
+		if candidate == "" {
+			continue
+		}
+		if _, dup := seen[candidate]; dup {
+			continue
+		}
+		if err := performGeminiCLISetup(ctx, httpClient, storage, candidate); err != nil {
+			return nil, fmt.Errorf("onboard project %s: %w", candidate, err)
+		}
+		finalID := strings.TrimSpace(storage.ProjectID)
+		if finalID == "" {
+			finalID = candidate
+		}
+		activated = append(activated, finalID)
+		seen[candidate] = struct{}{}
+	}
+	if len(activated) == 0 {
+		return nil, fmt.Errorf("no Google Cloud projects available for this account")
+	}
+	return activated, nil
+}
+
+func ensureGeminiProjectsEnabled(ctx context.Context, httpClient *http.Client, projectIDs []string) error {
+	for _, pid := range projectIDs {
+		trimmed := strings.TrimSpace(pid)
+		if trimmed == "" {
+			continue
+		}
+		isChecked, errCheck := checkCloudAPIIsEnabled(ctx, httpClient, trimmed)
+		if errCheck != nil {
+			return fmt.Errorf("project %s: %w", trimmed, errCheck)
+		}
+		if !isChecked {
+			return fmt.Errorf("project %s: Cloud AI API not enabled", trimmed)
+		}
+	}
+	return nil
+}
+
 func performGeminiCLISetup(ctx context.Context, httpClient *http.Client, storage *geminiAuth.GeminiTokenStorage, requestedProject string) error {
 	metadata := map[string]string{
 		"ideType":    "IDE_UNSPECIFIED",

internal/api/handlers/management/handler.go

@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/buildinfo"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/usage"
 	sdkAuth "github.com/router-for-me/CLIProxyAPI/v6/sdk/auth"
@@ -91,6 +92,10 @@ func (h *Handler) Middleware() gin.HandlerFunc {
 	const banDuration = 30 * time.Minute
 
 	return func(c *gin.Context) {
+		c.Header("X-CPA-VERSION", buildinfo.Version)
+		c.Header("X-CPA-COMMIT", buildinfo.Commit)
+		c.Header("X-CPA-BUILD-DATE", buildinfo.BuildDate)
+
 		clientIP := c.ClientIP()
 		localClient := clientIP == "127.0.0.1" || clientIP == "::1"
 		cfg := h.cfg

internal/auth/gemini/gemini_token.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
 	log "github.com/sirupsen/logrus"
@@ -67,3 +68,20 @@ func (ts *GeminiTokenStorage) SaveTokenToFile(authFilePath string) error {
 	}
 	return nil
 }
+
+// CredentialFileName returns the filename used to persist Gemini CLI credentials.
+// When projectID represents multiple projects (comma-separated or literal ALL),
+// the suffix is normalized to "all" and a "gemini-" prefix is enforced to keep
+// web and CLI generated files consistent.
+func CredentialFileName(email, projectID string, includeProviderPrefix bool) string {
+	email = strings.TrimSpace(email)
+	project := strings.TrimSpace(projectID)
+	if strings.EqualFold(project, "all") || strings.Contains(project, ",") {
+		return fmt.Sprintf("gemini-%s-all.json", email)
+	}
+	prefix := ""
+	if includeProviderPrefix {
+		prefix = "gemini-"
+	}
+	return fmt.Sprintf("%s%s-%s.json", prefix, email, project)
+}

internal/buildinfo/buildinfo.go

@@ -0,0 +1,15 @@
+// Package buildinfo exposes compile-time metadata shared across the server.
+package buildinfo
+
+// The following variables are overridden via ldflags during release builds.
+// Defaults cover local development builds.
+var (
+	// Version is the semantic version or git describe output of the binary.
+	Version = "dev"
+
+	// Commit is the git commit SHA baked into the binary.
+	Commit = "none"
+
+	// BuildDate records when the binary was built in UTC.
+	BuildDate = "unknown"
+)

internal/cmd/login.go

@@ -96,12 +96,20 @@ func DoLogin(cfg *config.Config, projectID string, options *LoginOptions) {
 	}
 
 	selectedProjectID := promptForProjectSelection(projects, strings.TrimSpace(projectID), promptFn)
-	if strings.TrimSpace(selectedProjectID) == "" {
+	projectSelections, errSelection := resolveProjectSelections(selectedProjectID, projects)
+	if errSelection != nil {
+		log.Fatalf("Invalid project selection: %v", errSelection)
+		return
+	}
+	if len(projectSelections) == 0 {
 		log.Fatal("No project selected; aborting login.")
 		return
 	}
 
-	if errSetup := performGeminiCLISetup(ctx, httpClient, storage, selectedProjectID); errSetup != nil {
+	activatedProjects := make([]string, 0, len(projectSelections))
+	for _, candidateID := range projectSelections {
+		log.Infof("Activating project %s", candidateID)
+		if errSetup := performGeminiCLISetup(ctx, httpClient, storage, candidateID); errSetup != nil {
 			var projectErr *projectSelectionRequiredError
 			if errors.As(errSetup, &projectErr) {
 				log.Error("Failed to start user onboarding: A project ID is required.")
@@ -111,21 +119,30 @@ func DoLogin(cfg *config.Config, projectID string, options *LoginOptions) {
 			log.Fatalf("Failed to complete user setup: %v", errSetup)
 			return
 		}
+		finalID := strings.TrimSpace(storage.ProjectID)
+		if finalID == "" {
+			finalID = candidateID
+		}
+		activatedProjects = append(activatedProjects, finalID)
+	}
 
 	storage.Auto = false
+	storage.ProjectID = strings.Join(activatedProjects, ",")
 
 	if !storage.Auto && !storage.Checked {
-		isChecked, errCheck := checkCloudAPIIsEnabled(ctx, httpClient, storage.ProjectID)
+		for _, pid := range activatedProjects {
+			isChecked, errCheck := checkCloudAPIIsEnabled(ctx, httpClient, pid)
 			if errCheck != nil {
-			log.Fatalf("Failed to check if Cloud AI API is enabled: %v", errCheck)
+				log.Fatalf("Failed to check if Cloud AI API is enabled for %s: %v", pid, errCheck)
 				return
 			}
-		storage.Checked = isChecked
 			if !isChecked {
-			log.Fatal("Failed to check if Cloud AI API is enabled. If you encounter an error message, please create an issue.")
+				log.Fatalf("Failed to check if Cloud AI API is enabled for project %s. If you encounter an error message, please create an issue.", pid)
 				return
 			}
 		}
+		storage.Checked = true
+	}
 
 	updateAuthRecord(record, storage)
 
@@ -354,10 +371,14 @@ func promptForProjectSelection(projects []interfaces.GCPProjectProjects, presetI
 			defaultIndex = idx
 		}
 	}
+	fmt.Println("Type 'ALL' to onboard every listed project.")
 
 	defaultID := projects[defaultIndex].ProjectID
 
 	if trimmedPreset != "" {
+		if strings.EqualFold(trimmedPreset, "ALL") {
+			return "ALL"
+		}
 		for _, project := range projects {
 			if project.ProjectID == trimmedPreset {
 				return trimmedPreset
@@ -367,13 +388,16 @@ func promptForProjectSelection(projects []interfaces.GCPProjectProjects, presetI
 	}
 
 	for {
-		promptMsg := fmt.Sprintf("Enter project ID [%s]: ", defaultID)
+		promptMsg := fmt.Sprintf("Enter project ID [%s] or ALL: ", defaultID)
 		answer, errPrompt := promptFn(promptMsg)
 		if errPrompt != nil {
 			log.Errorf("Project selection prompt failed: %v", errPrompt)
 			return defaultID
 		}
 		answer = strings.TrimSpace(answer)
+		if strings.EqualFold(answer, "ALL") {
+			return "ALL"
+		}
 		if answer == "" {
 			return defaultID
 		}
@@ -394,6 +418,52 @@ func promptForProjectSelection(projects []interfaces.GCPProjectProjects, presetI
 	}
 }
 
+func resolveProjectSelections(selection string, projects []interfaces.GCPProjectProjects) ([]string, error) {
+	trimmed := strings.TrimSpace(selection)
+	if trimmed == "" {
+		return nil, nil
+	}
+	available := make(map[string]struct{}, len(projects))
+	ordered := make([]string, 0, len(projects))
+	for _, project := range projects {
+		id := strings.TrimSpace(project.ProjectID)
+		if id == "" {
+			continue
+		}
+		if _, exists := available[id]; exists {
+			continue
+		}
+		available[id] = struct{}{}
+		ordered = append(ordered, id)
+	}
+	if strings.EqualFold(trimmed, "ALL") {
+		if len(ordered) == 0 {
+			return nil, fmt.Errorf("no projects available for ALL selection")
+		}
+		return append([]string(nil), ordered...), nil
+	}
+	parts := strings.Split(trimmed, ",")
+	selections := make([]string, 0, len(parts))
+	seen := make(map[string]struct{}, len(parts))
+	for _, part := range parts {
+		id := strings.TrimSpace(part)
+		if id == "" {
+			continue
+		}
+		if _, dup := seen[id]; dup {
+			continue
+		}
+		if len(available) > 0 {
+			if _, ok := available[id]; !ok {
+				return nil, fmt.Errorf("project %s not found in available projects", id)
+			}
+		}
+		seen[id] = struct{}{}
+		selections = append(selections, id)
+	}
+	return selections, nil
+}
+
 func defaultProjectPrompt() func(string) (string, error) {
 	reader := bufio.NewReader(os.Stdin)
 	return func(prompt string) (string, error) {
@@ -495,7 +565,7 @@ func updateAuthRecord(record *cliproxyauth.Auth, storage *gemini.GeminiTokenStor
 		return
 	}
 
-	finalName := fmt.Sprintf("%s-%s.json", storage.Email, storage.ProjectID)
+	finalName := gemini.CredentialFileName(storage.Email, storage.ProjectID, false)
 
 	if record.Metadata == nil {
 		record.Metadata = make(map[string]any)

internal/registry/model_registry.go

@@ -4,6 +4,7 @@
 package registry
 
 import (
+	"fmt"
 	"sort"
 	"strings"
 	"sync"
@@ -800,6 +801,9 @@ func (r *ModelRegistry) convertModelToMap(model *ModelInfo, handlerType string)
 		if model.Type != "" {
 			result["type"] = model.Type
 		}
+		if model.Created != 0 {
+			result["created"] = model.Created
+		}
 		return result
 	}
 }
@@ -821,3 +825,47 @@ func (r *ModelRegistry) CleanupExpiredQuotas() {
 		}
 	}
 }
+
+
+// GetFirstAvailableModel returns the first available model for the given handler type.
+// It prioritizes models by their creation timestamp (newest first) and checks if they have
+// available clients that are not suspended or over quota.
+//
+// Parameters:
+//   - handlerType: The API handler type (e.g., "openai", "claude", "gemini")
+//
+// Returns:
+//   - string: The model ID of the first available model, or empty string if none available
+//   - error: An error if no models are available
+func (r *ModelRegistry) GetFirstAvailableModel(handlerType string) (string, error) {
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	// Get all available models for this handler type
+	models := r.GetAvailableModels(handlerType)
+	if len(models) == 0 {
+		return "", fmt.Errorf("no models available for handler type: %s", handlerType)
+	}
+
+	// Sort models by creation timestamp (newest first)
+	sort.Slice(models, func(i, j int) bool {
+		// Extract created timestamps from map
+		createdI, okI := models[i]["created"].(int64)
+		createdJ, okJ := models[j]["created"].(int64)
+		if !okI || !okJ {
+			return false
+		}
+		return createdI > createdJ
+	})
+
+	// Find the first model with available clients
+	for _, model := range models {
+		if modelID, ok := model["id"].(string); ok {
+			if count := r.GetModelCount(modelID); count > 0 {
+				return modelID, nil
+			}
+		}
+	}
+
+	return "", fmt.Errorf("no available clients for any model in handler type: %s", handlerType)
+}

internal/runtime/executor/gemini_cli_executor.go

@@ -14,6 +14,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/runtime/geminicli"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
@@ -80,7 +81,7 @@ func (e *GeminiCLIExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth
 		}
 	}
 
-	projectID := strings.TrimSpace(stringValue(auth.Metadata, "project_id"))
+	projectID := resolveGeminiProjectID(auth)
 	models := cliPreviewFallbackOrder(req.Model)
 	if len(models) == 0 || models[0] != req.Model {
 		models = append([]string{req.Model}, models...)
@@ -214,7 +215,7 @@ func (e *GeminiCLIExecutor) ExecuteStream(ctx context.Context, auth *cliproxyaut
 	basePayload = util.StripThinkingConfigIfUnsupported(req.Model, basePayload)
 	basePayload = fixGeminiCLIImageAspectRatio(req.Model, basePayload)
 
-	projectID := strings.TrimSpace(stringValue(auth.Metadata, "project_id"))
+	projectID := resolveGeminiProjectID(auth)
 
 	models := cliPreviewFallbackOrder(req.Model)
 	if len(models) == 0 || models[0] != req.Model {
@@ -493,12 +494,13 @@ func (e *GeminiCLIExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth
 }
 
 func prepareGeminiCLITokenSource(ctx context.Context, cfg *config.Config, auth *cliproxyauth.Auth) (oauth2.TokenSource, map[string]any, error) {
-	if auth == nil || auth.Metadata == nil {
+	metadata := geminiOAuthMetadata(auth)
+	if auth == nil || metadata == nil {
 		return nil, nil, fmt.Errorf("gemini-cli auth metadata missing")
 	}
 
 	var base map[string]any
-	if tokenRaw, ok := auth.Metadata["token"].(map[string]any); ok && tokenRaw != nil {
+	if tokenRaw, ok := metadata["token"].(map[string]any); ok && tokenRaw != nil {
 		base = cloneMap(tokenRaw)
 	} else {
 		base = make(map[string]any)
@@ -512,16 +514,16 @@ func prepareGeminiCLITokenSource(ctx context.Context, cfg *config.Config, auth *
 	}
 
 	if token.AccessToken == "" {
-		token.AccessToken = stringValue(auth.Metadata, "access_token")
+		token.AccessToken = stringValue(metadata, "access_token")
 	}
 	if token.RefreshToken == "" {
-		token.RefreshToken = stringValue(auth.Metadata, "refresh_token")
+		token.RefreshToken = stringValue(metadata, "refresh_token")
 	}
 	if token.TokenType == "" {
-		token.TokenType = stringValue(auth.Metadata, "token_type")
+		token.TokenType = stringValue(metadata, "token_type")
 	}
 	if token.Expiry.IsZero() {
-		if expiry := stringValue(auth.Metadata, "expiry"); expiry != "" {
+		if expiry := stringValue(metadata, "expiry"); expiry != "" {
 			if ts, err := time.Parse(time.RFC3339, expiry); err == nil {
 				token.Expiry = ts
 			}
@@ -550,22 +552,28 @@ func prepareGeminiCLITokenSource(ctx context.Context, cfg *config.Config, auth *
 }
 
 func updateGeminiCLITokenMetadata(auth *cliproxyauth.Auth, base map[string]any, tok *oauth2.Token) {
-	if auth == nil || auth.Metadata == nil || tok == nil {
+	if auth == nil || tok == nil {
 		return
 	}
-	if tok.AccessToken != "" {
+	merged := buildGeminiTokenMap(base, tok)
-		auth.Metadata["access_token"] = tok.AccessToken
+	fields := buildGeminiTokenFields(tok, merged)
+	shared := geminicli.ResolveSharedCredential(auth.Runtime)
+	if shared != nil {
+		snapshot := shared.MergeMetadata(fields)
+		if !geminicli.IsVirtual(auth.Runtime) {
+			auth.Metadata = snapshot
 		}
-	if tok.TokenType != "" {
+		return
-		auth.Metadata["token_type"] = tok.TokenType
 	}
-	if tok.RefreshToken != "" {
+	if auth.Metadata == nil {
-		auth.Metadata["refresh_token"] = tok.RefreshToken
+		auth.Metadata = make(map[string]any)
 	}
-	if !tok.Expiry.IsZero() {
+	for k, v := range fields {
-		auth.Metadata["expiry"] = tok.Expiry.Format(time.RFC3339)
+		auth.Metadata[k] = v
 	}
+}
 
+func buildGeminiTokenMap(base map[string]any, tok *oauth2.Token) map[string]any {
 	merged := cloneMap(base)
 	if merged == nil {
 		merged = make(map[string]any)
@@ -578,8 +586,51 @@ func updateGeminiCLITokenMetadata(auth *cliproxyauth.Auth, base map[string]any,
 			}
 		}
 	}
+	return merged
+}
 
-	auth.Metadata["token"] = merged
+func buildGeminiTokenFields(tok *oauth2.Token, merged map[string]any) map[string]any {
+	fields := make(map[string]any, 5)
+	if tok.AccessToken != "" {
+		fields["access_token"] = tok.AccessToken
+	}
+	if tok.TokenType != "" {
+		fields["token_type"] = tok.TokenType
+	}
+	if tok.RefreshToken != "" {
+		fields["refresh_token"] = tok.RefreshToken
+	}
+	if !tok.Expiry.IsZero() {
+		fields["expiry"] = tok.Expiry.Format(time.RFC3339)
+	}
+	if len(merged) > 0 {
+		fields["token"] = cloneMap(merged)
+	}
+	return fields
+}
+
+func resolveGeminiProjectID(auth *cliproxyauth.Auth) string {
+	if auth == nil {
+		return ""
+	}
+	if runtime := auth.Runtime; runtime != nil {
+		if virtual, ok := runtime.(*geminicli.VirtualCredential); ok && virtual != nil {
+			return strings.TrimSpace(virtual.ProjectID)
+		}
+	}
+	return strings.TrimSpace(stringValue(auth.Metadata, "project_id"))
+}
+
+func geminiOAuthMetadata(auth *cliproxyauth.Auth) map[string]any {
+	if auth == nil {
+		return nil
+	}
+	if shared := geminicli.ResolveSharedCredential(auth.Runtime); shared != nil {
+		if snapshot := shared.MetadataSnapshot(); len(snapshot) > 0 {
+			return snapshot
+		}
+	}
+	return auth.Metadata
 }
 
 func newHTTPClient(ctx context.Context, cfg *config.Config, auth *cliproxyauth.Auth, timeout time.Duration) *http.Client {

internal/runtime/executor/usage_helpers.go

@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 	"github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/usage"
 	"github.com/tidwall/gjson"
@@ -32,7 +31,7 @@ func newUsageReporter(ctx context.Context, provider, model string, auth *cliprox
 		model:       model,
 		requestedAt: time.Now(),
 		apiKey:      apiKey,
-		source:      util.HideAPIKey(resolveUsageSource(auth, apiKey)),
+		source:      resolveUsageSource(auth, apiKey),
 	}
 	if auth != nil {
 		reporter.authID = auth.ID
@@ -129,6 +128,26 @@ func apiKeyFromContext(ctx context.Context) string {
 
 func resolveUsageSource(auth *cliproxyauth.Auth, ctxAPIKey string) string {
 	if auth != nil {
+		provider := strings.TrimSpace(auth.Provider)
+		if strings.EqualFold(provider, "gemini-cli") {
+			if id := strings.TrimSpace(auth.ID); id != "" {
+				return id
+			}
+		}
+		if strings.EqualFold(provider, "vertex") {
+			if auth.Metadata != nil {
+				if projectID, ok := auth.Metadata["project_id"].(string); ok {
+					if trimmed := strings.TrimSpace(projectID); trimmed != "" {
+						return trimmed
+					}
+				}
+				if project, ok := auth.Metadata["project"].(string); ok {
+					if trimmed := strings.TrimSpace(project); trimmed != "" {
+						return trimmed
+					}
+				}
+			}
+		}
 		if _, value := auth.AccountInfo(); value != "" {
 			return strings.TrimSpace(value)
 		}

internal/runtime/geminicli/state.go

@@ -0,0 +1,144 @@
+package geminicli
+
+import (
+	"strings"
+	"sync"
+)
+
+// SharedCredential keeps canonical OAuth metadata for a multi-project Gemini CLI login.
+type SharedCredential struct {
+	primaryID  string
+	email      string
+	metadata   map[string]any
+	projectIDs []string
+	mu         sync.RWMutex
+}
+
+// NewSharedCredential builds a shared credential container for the given primary entry.
+func NewSharedCredential(primaryID, email string, metadata map[string]any, projectIDs []string) *SharedCredential {
+	return &SharedCredential{
+		primaryID:  strings.TrimSpace(primaryID),
+		email:      strings.TrimSpace(email),
+		metadata:   cloneMap(metadata),
+		projectIDs: cloneStrings(projectIDs),
+	}
+}
+
+// PrimaryID returns the owning credential identifier.
+func (s *SharedCredential) PrimaryID() string {
+	if s == nil {
+		return ""
+	}
+	return s.primaryID
+}
+
+// Email returns the associated account email.
+func (s *SharedCredential) Email() string {
+	if s == nil {
+		return ""
+	}
+	return s.email
+}
+
+// ProjectIDs returns a snapshot of the configured project identifiers.
+func (s *SharedCredential) ProjectIDs() []string {
+	if s == nil {
+		return nil
+	}
+	return cloneStrings(s.projectIDs)
+}
+
+// MetadataSnapshot returns a deep copy of the stored OAuth metadata.
+func (s *SharedCredential) MetadataSnapshot() map[string]any {
+	if s == nil {
+		return nil
+	}
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return cloneMap(s.metadata)
+}
+
+// MergeMetadata merges the provided fields into the shared metadata and returns an updated copy.
+func (s *SharedCredential) MergeMetadata(values map[string]any) map[string]any {
+	if s == nil {
+		return nil
+	}
+	if len(values) == 0 {
+		return s.MetadataSnapshot()
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.metadata == nil {
+		s.metadata = make(map[string]any, len(values))
+	}
+	for k, v := range values {
+		if v == nil {
+			delete(s.metadata, k)
+			continue
+		}
+		s.metadata[k] = v
+	}
+	return cloneMap(s.metadata)
+}
+
+// SetProjectIDs updates the stored project identifiers.
+func (s *SharedCredential) SetProjectIDs(ids []string) {
+	if s == nil {
+		return
+	}
+	s.mu.Lock()
+	s.projectIDs = cloneStrings(ids)
+	s.mu.Unlock()
+}
+
+// VirtualCredential tracks a per-project virtual auth entry that reuses a primary credential.
+type VirtualCredential struct {
+	ProjectID string
+	Parent    *SharedCredential
+}
+
+// NewVirtualCredential creates a virtual credential descriptor bound to the shared parent.
+func NewVirtualCredential(projectID string, parent *SharedCredential) *VirtualCredential {
+	return &VirtualCredential{ProjectID: strings.TrimSpace(projectID), Parent: parent}
+}
+
+// ResolveSharedCredential returns the shared credential backing the provided runtime payload.
+func ResolveSharedCredential(runtime any) *SharedCredential {
+	switch typed := runtime.(type) {
+	case *SharedCredential:
+		return typed
+	case *VirtualCredential:
+		return typed.Parent
+	default:
+		return nil
+	}
+}
+
+// IsVirtual reports whether the runtime payload represents a virtual credential.
+func IsVirtual(runtime any) bool {
+	if runtime == nil {
+		return false
+	}
+	_, ok := runtime.(*VirtualCredential)
+	return ok
+}
+
+func cloneMap(in map[string]any) map[string]any {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(in))
+	for k, v := range in {
+		out[k] = v
+	}
+	return out
+}
+
+func cloneStrings(in []string) []string {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make([]string, len(in))
+	copy(out, in)
+	return out
+}

internal/util/provider.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/registry"
+	log "github.com/sirupsen/logrus"
 )
 
 // GetProviderName determines all AI service providers capable of serving a registered model.
@@ -59,6 +60,30 @@ func GetProviderName(modelName string) []string {
 	return providers
 }
 
+// ResolveAutoModel resolves the "auto" model name to an actual available model.
+// It uses an empty handler type to get any available model from the registry.
+//
+// Parameters:
+//   - modelName: The model name to check (should be "auto")
+//
+// Returns:
+//   - string: The resolved model name, or the original if not "auto" or resolution fails
+func ResolveAutoModel(modelName string) string {
+	if modelName != "auto" {
+		return modelName
+	}
+
+	// Use empty string as handler type to get any available model
+	firstModel, err := registry.GetGlobalRegistry().GetFirstAvailableModel("")
+	if err != nil {
+		log.Warnf("Failed to resolve 'auto' model: %v, falling back to original model name", err)
+		return modelName
+	}
+
+	log.Infof("Resolved 'auto' model to: %s", firstModel)
+	return firstModel
+}
+
 // IsOpenAICompatibilityAlias checks if the given model name is an alias
 // configured for OpenAI compatibility routing.
 //

internal/watcher/watcher.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/fsnotify/fsnotify"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/runtime/geminicli"
 	"gopkg.in/yaml.v3"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
@@ -476,8 +477,10 @@ func (w *Watcher) processEvents(ctx context.Context) {
 // handleEvent processes individual file system events
 func (w *Watcher) handleEvent(event fsnotify.Event) {
 	// Filter only relevant events: config file or auth-dir JSON files.
-	isConfigEvent := event.Name == w.configPath && (event.Op&fsnotify.Write == fsnotify.Write || event.Op&fsnotify.Create == fsnotify.Create)
+	configOps := fsnotify.Write | fsnotify.Create | fsnotify.Rename
-	isAuthJSON := strings.HasPrefix(event.Name, w.authDir) && strings.HasSuffix(event.Name, ".json")
+	isConfigEvent := event.Name == w.configPath && event.Op&configOps != 0
+	authOps := fsnotify.Create | fsnotify.Write | fsnotify.Remove | fsnotify.Rename
+	isAuthJSON := strings.HasPrefix(event.Name, w.authDir) && strings.HasSuffix(event.Name, ".json") && event.Op&authOps != 0
 	if !isConfigEvent && !isAuthJSON {
 		// Ignore unrelated files (e.g., cookie snapshots *.cookie) and other noise.
 		return
@@ -495,18 +498,19 @@ func (w *Watcher) handleEvent(event fsnotify.Event) {
 
 	// Handle auth directory changes incrementally (.json only)
 	fmt.Printf("auth file changed (%s): %s, processing incrementally\n", event.Op.String(), filepath.Base(event.Name))
-	if event.Op&fsnotify.Create == fsnotify.Create || event.Op&fsnotify.Write == fsnotify.Write {
+	if event.Op&(fsnotify.Remove|fsnotify.Rename) != 0 {
-		w.addOrUpdateClient(event.Name)
+		// Atomic replace on some platforms may surface as Rename (or Remove) before the new file is ready.
-	} else if event.Op&fsnotify.Remove == fsnotify.Remove {
+		// Wait briefly; if the path exists again, treat as an update instead of removal.
-		// Atomic replace on some platforms may surface as Remove+Create for the target path.
-		// Wait briefly; if the file exists again, treat as update instead of removal.
 		time.Sleep(replaceCheckDelay)
 		if _, statErr := os.Stat(event.Name); statErr == nil {
-			// File exists after a short delay; handle as an update.
 			w.addOrUpdateClient(event.Name)
 			return
 		}
 		w.removeClient(event.Name)
+		return
+	}
+	if event.Op&(fsnotify.Create|fsnotify.Write) != 0 {
+		w.addOrUpdateClient(event.Name)
 	}
 }
 
@@ -1026,11 +1030,119 @@ func (w *Watcher) SnapshotCoreAuths() []*coreauth.Auth {
 			CreatedAt: now,
 			UpdatedAt: now,
 		}
+		if provider == "gemini-cli" {
+			if virtuals := synthesizeGeminiVirtualAuths(a, metadata, now); len(virtuals) > 0 {
+				out = append(out, a)
+				out = append(out, virtuals...)
+				continue
+			}
+		}
 		out = append(out, a)
 	}
 	return out
 }
 
+func synthesizeGeminiVirtualAuths(primary *coreauth.Auth, metadata map[string]any, now time.Time) []*coreauth.Auth {
+	if primary == nil || metadata == nil {
+		return nil
+	}
+	projects := splitGeminiProjectIDs(metadata)
+	if len(projects) <= 1 {
+		return nil
+	}
+	email, _ := metadata["email"].(string)
+	shared := geminicli.NewSharedCredential(primary.ID, email, metadata, projects)
+	primary.Disabled = true
+	primary.Status = coreauth.StatusDisabled
+	primary.Runtime = shared
+	if primary.Attributes == nil {
+		primary.Attributes = make(map[string]string)
+	}
+	primary.Attributes["gemini_virtual_primary"] = "true"
+	primary.Attributes["virtual_children"] = strings.Join(projects, ",")
+	source := primary.Attributes["source"]
+	authPath := primary.Attributes["path"]
+	originalProvider := primary.Provider
+	if originalProvider == "" {
+		originalProvider = "gemini-cli"
+	}
+	label := primary.Label
+	if label == "" {
+		label = originalProvider
+	}
+	virtuals := make([]*coreauth.Auth, 0, len(projects))
+	for _, projectID := range projects {
+		attrs := map[string]string{
+			"runtime_only":           "true",
+			"gemini_virtual_parent":  primary.ID,
+			"gemini_virtual_project": projectID,
+		}
+		if source != "" {
+			attrs["source"] = source
+		}
+		if authPath != "" {
+			attrs["path"] = authPath
+		}
+		metadataCopy := map[string]any{
+			"email":             email,
+			"project_id":        projectID,
+			"virtual":           true,
+			"virtual_parent_id": primary.ID,
+			"type":              metadata["type"],
+		}
+		proxy := strings.TrimSpace(primary.ProxyURL)
+		if proxy != "" {
+			metadataCopy["proxy_url"] = proxy
+		}
+		virtual := &coreauth.Auth{
+			ID:         buildGeminiVirtualID(primary.ID, projectID),
+			Provider:   originalProvider,
+			Label:      fmt.Sprintf("%s [%s]", label, projectID),
+			Status:     coreauth.StatusActive,
+			Attributes: attrs,
+			Metadata:   metadataCopy,
+			ProxyURL:   primary.ProxyURL,
+			CreatedAt:  now,
+			UpdatedAt:  now,
+			Runtime:    geminicli.NewVirtualCredential(projectID, shared),
+		}
+		virtuals = append(virtuals, virtual)
+	}
+	return virtuals
+}
+
+func splitGeminiProjectIDs(metadata map[string]any) []string {
+	raw, _ := metadata["project_id"].(string)
+	trimmed := strings.TrimSpace(raw)
+	if trimmed == "" {
+		return nil
+	}
+	parts := strings.Split(trimmed, ",")
+	result := make([]string, 0, len(parts))
+	seen := make(map[string]struct{}, len(parts))
+	for _, part := range parts {
+		id := strings.TrimSpace(part)
+		if id == "" {
+			continue
+		}
+		if _, ok := seen[id]; ok {
+			continue
+		}
+		seen[id] = struct{}{}
+		result = append(result, id)
+	}
+	return result
+}
+
+func buildGeminiVirtualID(baseID, projectID string) string {
+	project := strings.TrimSpace(projectID)
+	if project == "" {
+		project = "project"
+	}
+	replacer := strings.NewReplacer("/", "_", "\\", "_", " ", "_")
+	return fmt.Sprintf("%s::%s", baseID, replacer.Replace(project))
+}
+
 // buildCombinedClientMap merges file-based clients with API key clients from the cache.
 // buildCombinedClientMap removed
 

sdk/api/handlers/handlers.go

@@ -295,11 +295,14 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 }
 
 func (h *BaseAPIHandler) getRequestDetails(modelName string) (providers []string, normalizedModel string, metadata map[string]any, err *interfaces.ErrorMessage) {
-	providerName, extractedModelName, isDynamic := h.parseDynamicModel(modelName)
+	// Resolve "auto" model to an actual available model first
+	resolvedModelName := util.ResolveAutoModel(modelName)
+	
+	providerName, extractedModelName, isDynamic := h.parseDynamicModel(resolvedModelName)
 
 	// First, normalize the model name to handle suffixes like "-thinking-128"
 	// This needs to happen before determining the provider for non-dynamic models.
-	normalizedModel, metadata = normalizeModelMetadata(modelName)
+	normalizedModel, metadata = normalizeModelMetadata(resolvedModelName)
 
 	if isDynamic {
 		providers = []string{providerName}

sdk/cliproxy/service.go

@@ -604,6 +604,12 @@ func (s *Service) registerModelsForAuth(a *coreauth.Auth) {
 	if a == nil || a.ID == "" {
 		return
 	}
+	if a.Attributes != nil {
+		if v := strings.TrimSpace(a.Attributes["gemini_virtual_primary"]); strings.EqualFold(v, "true") {
+			GlobalModelRegistry().UnregisterClient(a.ID)
+			return
+		}
+	}
 	// Unregister legacy client ID (if present) to avoid double counting
 	if a.Runtime != nil {
 		if idGetter, ok := a.Runtime.(interface{ GetClientID() string }); ok {