Merge pull request #68 from router-for-me/plus

v6.6.56

config.example.yaml

@@ -39,6 +39,9 @@ api-keys:
 # Enable debug logging
 debug: false
 
+# When true, disable high-overhead HTTP middleware features to reduce per-request memory usage under high concurrency.
+commercial-mode: false
+
 # Open OAuth URLs in incognito/private browser mode.
 # Useful when you want to login with a different account without logging out from your current session.
 # Default: false (but Kiro auth defaults to true for multi-account support)
@@ -78,6 +81,11 @@ routing:
 # When true, enable authentication for the WebSocket API (/v1/ws).
 ws-auth: false
 
+# Streaming behavior (SSE keep-alives + safe bootstrap retries).
+# streaming:
+#   keepalive-seconds: 15   # Default: 0 (disabled). <= 0 disables keep-alives.
+#   bootstrap-retries: 1    # Default: 0 (disabled). Retries before first byte is sent.
+
 # Gemini API keys
 # gemini-api-key:
 #   - api-key: "AIzaSy...01"

internal/api/handlers/management/logs.go

@@ -209,6 +209,94 @@ func (h *Handler) GetRequestErrorLogs(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"files": files})
 }
 
+// GetRequestLogByID finds and downloads a request log file by its request ID.
+// The ID is matched against the suffix of log file names (format: *-{requestID}.log).
+func (h *Handler) GetRequestLogByID(c *gin.Context) {
+	if h == nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "handler unavailable"})
+		return
+	}
+	if h.cfg == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "configuration unavailable"})
+		return
+	}
+
+	dir := h.logDirectory()
+	if strings.TrimSpace(dir) == "" {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "log directory not configured"})
+		return
+	}
+
+	requestID := strings.TrimSpace(c.Param("id"))
+	if requestID == "" {
+		requestID = strings.TrimSpace(c.Query("id"))
+	}
+	if requestID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "missing request ID"})
+		return
+	}
+	if strings.ContainsAny(requestID, "/\\") {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid request ID"})
+		return
+	}
+
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			c.JSON(http.StatusNotFound, gin.H{"error": "log directory not found"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("failed to list log directory: %v", err)})
+		return
+	}
+
+	suffix := "-" + requestID + ".log"
+	var matchedFile string
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		if strings.HasSuffix(name, suffix) {
+			matchedFile = name
+			break
+		}
+	}
+
+	if matchedFile == "" {
+		c.JSON(http.StatusNotFound, gin.H{"error": "log file not found for the given request ID"})
+		return
+	}
+
+	dirAbs, errAbs := filepath.Abs(dir)
+	if errAbs != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("failed to resolve log directory: %v", errAbs)})
+		return
+	}
+	fullPath := filepath.Clean(filepath.Join(dirAbs, matchedFile))
+	prefix := dirAbs + string(os.PathSeparator)
+	if !strings.HasPrefix(fullPath, prefix) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid log file path"})
+		return
+	}
+
+	info, errStat := os.Stat(fullPath)
+	if errStat != nil {
+		if os.IsNotExist(errStat) {
+			c.JSON(http.StatusNotFound, gin.H{"error": "log file not found"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("failed to read log file: %v", errStat)})
+		return
+	}
+	if info.IsDir() {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid log file"})
+		return
+	}
+
+	c.FileAttachment(fullPath, matchedFile)
+}
+
 // DownloadRequestErrorLog downloads a specific error request log file by name.
 func (h *Handler) DownloadRequestErrorLog(c *gin.Context) {
 	if h == nil {

internal/api/handlers/management/usage.go

@@ -1,12 +1,25 @@
 package management
 
 import (
+	"encoding/json"
 	"net/http"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/usage"
 )
 
+type usageExportPayload struct {
+	Version    int                      `json:"version"`
+	ExportedAt time.Time                `json:"exported_at"`
+	Usage      usage.StatisticsSnapshot `json:"usage"`
+}
+
+type usageImportPayload struct {
+	Version int                      `json:"version"`
+	Usage   usage.StatisticsSnapshot `json:"usage"`
+}
+
 // GetUsageStatistics returns the in-memory request statistics snapshot.
 func (h *Handler) GetUsageStatistics(c *gin.Context) {
 	var snapshot usage.StatisticsSnapshot
@@ -18,3 +31,49 @@ func (h *Handler) GetUsageStatistics(c *gin.Context) {
 		"failed_requests": snapshot.FailureCount,
 	})
 }
+
+// ExportUsageStatistics returns a complete usage snapshot for backup/migration.
+func (h *Handler) ExportUsageStatistics(c *gin.Context) {
+	var snapshot usage.StatisticsSnapshot
+	if h != nil && h.usageStats != nil {
+		snapshot = h.usageStats.Snapshot()
+	}
+	c.JSON(http.StatusOK, usageExportPayload{
+		Version:    1,
+		ExportedAt: time.Now().UTC(),
+		Usage:      snapshot,
+	})
+}
+
+// ImportUsageStatistics merges a previously exported usage snapshot into memory.
+func (h *Handler) ImportUsageStatistics(c *gin.Context) {
+	if h == nil || h.usageStats == nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "usage statistics unavailable"})
+		return
+	}
+
+	data, err := c.GetRawData()
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "failed to read request body"})
+		return
+	}
+
+	var payload usageImportPayload
+	if err := json.Unmarshal(data, &payload); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid json"})
+		return
+	}
+	if payload.Version != 0 && payload.Version != 1 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "unsupported version"})
+		return
+	}
+
+	result := h.usageStats.MergeSnapshot(payload.Usage)
+	snapshot := h.usageStats.Snapshot()
+	c.JSON(http.StatusOK, gin.H{
+		"added":           result.Added,
+		"skipped":         result.Skipped,
+		"total_requests":  snapshot.TotalRequests,
+		"failed_requests": snapshot.FailureCount,
+	})
+}

internal/api/middleware/request_logging.go

@@ -98,10 +98,11 @@ func captureRequestInfo(c *gin.Context) (*RequestInfo, error) {
 	}
 
 	return &RequestInfo{
-		URL:     url,
-		Method:  method,
-		Headers: headers,
-		Body:    body,
+		URL:       url,
+		Method:    method,
+		Headers:   headers,
+		Body:      body,
+		RequestID: logging.GetGinRequestID(c),
 	}, nil
 }
 

internal/api/middleware/response_writer.go

@@ -15,10 +15,11 @@ import (
 
 // RequestInfo holds essential details of an incoming HTTP request for logging purposes.
 type RequestInfo struct {
-	URL     string              // URL is the request URL.
-	Method  string              // Method is the HTTP method (e.g., GET, POST).
-	Headers map[string][]string // Headers contains the request headers.
-	Body    []byte              // Body is the raw request body.
+	URL       string              // URL is the request URL.
+	Method    string              // Method is the HTTP method (e.g., GET, POST).
+	Headers   map[string][]string // Headers contains the request headers.
+	Body      []byte              // Body is the raw request body.
+	RequestID string              // RequestID is the unique identifier for the request.
 }
 
 // ResponseWriterWrapper wraps the standard gin.ResponseWriter to intercept and log response data.
@@ -149,6 +150,7 @@ func (w *ResponseWriterWrapper) WriteHeader(statusCode int) {
 			w.requestInfo.Method,
 			w.requestInfo.Headers,
 			w.requestInfo.Body,
+			w.requestInfo.RequestID,
 		)
 		if err == nil {
 			w.streamWriter = streamWriter
@@ -346,7 +348,7 @@ func (w *ResponseWriterWrapper) logRequest(statusCode int, headers map[string][]
 	}
 
 	if loggerWithOptions, ok := w.logger.(interface {
-		LogRequestWithOptions(string, string, map[string][]string, []byte, int, map[string][]string, []byte, []byte, []byte, []*interfaces.ErrorMessage, bool) error
+		LogRequestWithOptions(string, string, map[string][]string, []byte, int, map[string][]string, []byte, []byte, []byte, []*interfaces.ErrorMessage, bool, string) error
 	}); ok {
 		return loggerWithOptions.LogRequestWithOptions(
 			w.requestInfo.URL,
@@ -360,6 +362,7 @@ func (w *ResponseWriterWrapper) logRequest(statusCode int, headers map[string][]
 			apiResponseBody,
 			apiResponseErrors,
 			forceLog,
+			w.requestInfo.RequestID,
 		)
 	}
 
@@ -374,5 +377,6 @@ func (w *ResponseWriterWrapper) logRequest(statusCode int, headers map[string][]
 		apiRequestBody,
 		apiResponseBody,
 		apiResponseErrors,
+		w.requestInfo.RequestID,
 	)
 }

internal/api/modules/amp/amp.go

@@ -279,16 +279,23 @@ func (m *AmpModule) hasModelMappingsChanged(old *config.AmpCode, new *config.Amp
 		return true
 	}
 
-	// Build map for efficient comparison
-	oldMap := make(map[string]string, len(old.ModelMappings))
+	// Build map for efficient and robust comparison
+	type mappingInfo struct {
+		to    string
+		regex bool
+	}
+	oldMap := make(map[string]mappingInfo, len(old.ModelMappings))
 	for _, mapping := range old.ModelMappings {
-		oldMap[strings.TrimSpace(mapping.From)] = strings.TrimSpace(mapping.To)
+		oldMap[strings.TrimSpace(mapping.From)] = mappingInfo{
+			to:    strings.TrimSpace(mapping.To),
+			regex: mapping.Regex,
+		}
 	}
 
 	for _, mapping := range new.ModelMappings {
 		from := strings.TrimSpace(mapping.From)
 		to := strings.TrimSpace(mapping.To)
-		if oldTo, exists := oldMap[from]; !exists || oldTo != to {
+		if oldVal, exists := oldMap[from]; !exists || oldVal.to != to || oldVal.regex != mapping.Regex {
 			return true
 		}
 	}

internal/api/modules/amp/model_mapping.go

@@ -3,6 +3,7 @@
 package amp
 
 import (
+	"regexp"
 	"strings"
 	"sync"
 
@@ -26,13 +27,15 @@ type ModelMapper interface {
 // DefaultModelMapper implements ModelMapper with thread-safe mapping storage.
 type DefaultModelMapper struct {
 	mu       sync.RWMutex
-	mappings map[string]string // from -> to (normalized lowercase keys)
+	mappings map[string]string // exact: from -> to (normalized lowercase keys)
+	regexps  []regexMapping    // regex rules evaluated in order
 }
 
 // NewModelMapper creates a new model mapper with the given initial mappings.
 func NewModelMapper(mappings []config.AmpModelMapping) *DefaultModelMapper {
 	m := &DefaultModelMapper{
 		mappings: make(map[string]string),
+		regexps:  nil,
 	}
 	m.UpdateMappings(mappings)
 	return m
@@ -55,7 +58,18 @@ func (m *DefaultModelMapper) MapModel(requestedModel string) string {
 	// Check for direct mapping
 	targetModel, exists := m.mappings[normalizedRequest]
 	if !exists {
-		return ""
+		// Try regex mappings in order
+		base, _ := util.NormalizeThinkingModel(requestedModel)
+		for _, rm := range m.regexps {
+			if rm.re.MatchString(requestedModel) || (base != "" && rm.re.MatchString(base)) {
+				targetModel = rm.to
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			return ""
+		}
 	}
 
 	// Verify target model has available providers
@@ -78,6 +92,7 @@ func (m *DefaultModelMapper) UpdateMappings(mappings []config.AmpModelMapping) {
 
 	// Clear and rebuild mappings
 	m.mappings = make(map[string]string, len(mappings))
+	m.regexps = make([]regexMapping, 0, len(mappings))
 
 	for _, mapping := range mappings {
 		from := strings.TrimSpace(mapping.From)
@@ -88,16 +103,30 @@ func (m *DefaultModelMapper) UpdateMappings(mappings []config.AmpModelMapping) {
 			continue
 		}
 
-		// Store with normalized lowercase key for case-insensitive lookup
-		normalizedFrom := strings.ToLower(from)
-		m.mappings[normalizedFrom] = to
-
-		log.Debugf("amp model mapping registered: %s -> %s", from, to)
+		if mapping.Regex {
+			// Compile case-insensitive regex; wrap with (?i) to match behavior of exact lookups
+			pattern := "(?i)" + from
+			re, err := regexp.Compile(pattern)
+			if err != nil {
+				log.Warnf("amp model mapping: invalid regex %q: %v", from, err)
+				continue
+			}
+			m.regexps = append(m.regexps, regexMapping{re: re, to: to})
+			log.Debugf("amp model regex mapping registered: /%s/ -> %s", from, to)
+		} else {
+			// Store with normalized lowercase key for case-insensitive lookup
+			normalizedFrom := strings.ToLower(from)
+			m.mappings[normalizedFrom] = to
+			log.Debugf("amp model mapping registered: %s -> %s", from, to)
+		}
 	}
 
 	if len(m.mappings) > 0 {
 		log.Infof("amp model mapping: loaded %d mapping(s)", len(m.mappings))
 	}
+	if n := len(m.regexps); n > 0 {
+		log.Infof("amp model mapping: loaded %d regex mapping(s)", n)
+	}
 }
 
 // GetMappings returns a copy of current mappings (for debugging/status).
@@ -111,3 +140,8 @@ func (m *DefaultModelMapper) GetMappings() map[string]string {
 	}
 	return result
 }
+
+type regexMapping struct {
+	re *regexp.Regexp
+	to string
+}

internal/api/modules/amp/model_mapping_test.go

@@ -203,3 +203,81 @@ func TestModelMapper_GetMappings_ReturnsCopy(t *testing.T) {
 		t.Error("Original map was modified")
 	}
 }
+
+func TestModelMapper_Regex_MatchBaseWithoutParens(t *testing.T) {
+	reg := registry.GetGlobalRegistry()
+	reg.RegisterClient("test-client-regex-1", "gemini", []*registry.ModelInfo{
+		{ID: "gemini-2.5-pro", OwnedBy: "google", Type: "gemini"},
+	})
+	defer reg.UnregisterClient("test-client-regex-1")
+
+	mappings := []config.AmpModelMapping{
+		{From: "^gpt-5$", To: "gemini-2.5-pro", Regex: true},
+	}
+
+	mapper := NewModelMapper(mappings)
+
+	// Incoming model has reasoning suffix but should match base via regex
+	result := mapper.MapModel("gpt-5(high)")
+	if result != "gemini-2.5-pro" {
+		t.Errorf("Expected gemini-2.5-pro, got %s", result)
+	}
+}
+
+func TestModelMapper_Regex_ExactPrecedence(t *testing.T) {
+	reg := registry.GetGlobalRegistry()
+	reg.RegisterClient("test-client-regex-2", "claude", []*registry.ModelInfo{
+		{ID: "claude-sonnet-4", OwnedBy: "anthropic", Type: "claude"},
+	})
+	reg.RegisterClient("test-client-regex-3", "gemini", []*registry.ModelInfo{
+		{ID: "gemini-2.5-pro", OwnedBy: "google", Type: "gemini"},
+	})
+	defer reg.UnregisterClient("test-client-regex-2")
+	defer reg.UnregisterClient("test-client-regex-3")
+
+	mappings := []config.AmpModelMapping{
+		{From: "gpt-5", To: "claude-sonnet-4"},                 // exact
+		{From: "^gpt-5.*$", To: "gemini-2.5-pro", Regex: true}, // regex
+	}
+
+	mapper := NewModelMapper(mappings)
+
+	// Exact match should win over regex
+	result := mapper.MapModel("gpt-5")
+	if result != "claude-sonnet-4" {
+		t.Errorf("Expected claude-sonnet-4, got %s", result)
+	}
+}
+
+func TestModelMapper_Regex_InvalidPattern_Skipped(t *testing.T) {
+	// Invalid regex should be skipped and not cause panic
+	mappings := []config.AmpModelMapping{
+		{From: "(", To: "target", Regex: true},
+	}
+
+	mapper := NewModelMapper(mappings)
+
+	result := mapper.MapModel("anything")
+	if result != "" {
+		t.Errorf("Expected empty result due to invalid regex, got %s", result)
+	}
+}
+
+func TestModelMapper_Regex_CaseInsensitive(t *testing.T) {
+	reg := registry.GetGlobalRegistry()
+	reg.RegisterClient("test-client-regex-4", "claude", []*registry.ModelInfo{
+		{ID: "claude-sonnet-4", OwnedBy: "anthropic", Type: "claude"},
+	})
+	defer reg.UnregisterClient("test-client-regex-4")
+
+	mappings := []config.AmpModelMapping{
+		{From: "^CLAUDE-OPUS-.*$", To: "claude-sonnet-4", Regex: true},
+	}
+
+	mapper := NewModelMapper(mappings)
+
+	result := mapper.MapModel("claude-opus-4.5")
+	if result != "claude-sonnet-4" {
+		t.Errorf("Expected claude-sonnet-4, got %s", result)
+	}
+}

internal/api/server.go

@@ -209,13 +209,15 @@ func NewServer(cfg *config.Config, authManager *auth.Manager, accessManager *sdk
 	// Resolve logs directory relative to the configuration file directory.
 	var requestLogger logging.RequestLogger
 	var toggle func(bool)
-	if optionState.requestLoggerFactory != nil {
-		requestLogger = optionState.requestLoggerFactory(cfg, configFilePath)
-	}
-	if requestLogger != nil {
-		engine.Use(middleware.RequestLoggingMiddleware(requestLogger))
-		if setter, ok := requestLogger.(interface{ SetEnabled(bool) }); ok {
-			toggle = setter.SetEnabled
+	if !cfg.CommercialMode {
+		if optionState.requestLoggerFactory != nil {
+			requestLogger = optionState.requestLoggerFactory(cfg, configFilePath)
+		}
+		if requestLogger != nil {
+			engine.Use(middleware.RequestLoggingMiddleware(requestLogger))
+			if setter, ok := requestLogger.(interface{ SetEnabled(bool) }); ok {
+				toggle = setter.SetEnabled
+			}
 		}
 	}
 
@@ -494,6 +496,8 @@ func (s *Server) registerManagementRoutes() {
 	mgmt.Use(s.managementAvailabilityMiddleware(), s.mgmt.Middleware())
 	{
 		mgmt.GET("/usage", s.mgmt.GetUsageStatistics)
+		mgmt.GET("/usage/export", s.mgmt.ExportUsageStatistics)
+		mgmt.POST("/usage/import", s.mgmt.ImportUsageStatistics)
 		mgmt.GET("/config", s.mgmt.GetConfig)
 		mgmt.GET("/config.yaml", s.mgmt.GetConfigYAML)
 		mgmt.PUT("/config.yaml", s.mgmt.PutConfigYAML)
@@ -538,6 +542,7 @@ func (s *Server) registerManagementRoutes() {
 		mgmt.DELETE("/logs", s.mgmt.DeleteLogs)
 		mgmt.GET("/request-error-logs", s.mgmt.GetRequestErrorLogs)
 		mgmt.GET("/request-error-logs/:name", s.mgmt.DownloadRequestErrorLog)
+		mgmt.GET("/request-log-by-id/:id", s.mgmt.GetRequestLogByID)
 		mgmt.GET("/request-log", s.mgmt.GetRequestLog)
 		mgmt.PUT("/request-log", s.mgmt.PutRequestLog)
 		mgmt.PATCH("/request-log", s.mgmt.PutRequestLog)

internal/auth/kiro/aws.go

@@ -40,6 +40,10 @@ type KiroTokenData struct {
 	ClientSecret string `json:"clientSecret,omitempty"`
 	// Email is the user's email address (used for file naming)
 	Email string `json:"email,omitempty"`
+	// StartURL is the IDC/Identity Center start URL (only for IDC auth method)
+	StartURL string `json:"startUrl,omitempty"`
+	// Region is the AWS region for IDC authentication (only for IDC auth method)
+	Region string `json:"region,omitempty"`
 }
 
 // KiroAuthBundle aggregates authentication data after OAuth flow completion

internal/auth/kiro/sso_oidc.go

@@ -2,16 +2,19 @@
 package kiro
 
 import (
+	"bufio"
 	"context"
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"html"
 	"io"
 	"net"
 	"net/http"
+	"os"
 	"strings"
 	"time"
 
@@ -24,19 +27,31 @@ import (
 const (
 	// AWS SSO OIDC endpoints
 	ssoOIDCEndpoint = "https://oidc.us-east-1.amazonaws.com"
-	
+
 	// Kiro's start URL for Builder ID
 	builderIDStartURL = "https://view.awsapps.com/start"
-	
+
+	// Default region for IDC
+	defaultIDCRegion = "us-east-1"
+
 	// Polling interval
 	pollInterval = 5 * time.Second
-	
+
 	// Authorization code flow callback
 	authCodeCallbackPath = "/oauth/callback"
 	authCodeCallbackPort = 19877
-	
+
 	// User-Agent to match official Kiro IDE
 	kiroUserAgent = "KiroIDE"
+
+	// IDC token refresh headers (matching Kiro IDE behavior)
+	idcAmzUserAgent = "aws-sdk-js/3.738.0 ua/2.1 os/other lang/js md/browser#unknown_unknown api/sso-oidc#3.738.0 m/E KiroIDE"
+)
+
+// Sentinel errors for OIDC token polling
+var (
+	ErrAuthorizationPending = errors.New("authorization_pending")
+	ErrSlowDown             = errors.New("slow_down")
 )
 
 // SSOOIDCClient handles AWS SSO OIDC authentication.
@@ -83,6 +98,440 @@ type CreateTokenResponse struct {
 	RefreshToken string `json:"refreshToken"`
 }
 
+// getOIDCEndpoint returns the OIDC endpoint for the given region.
+func getOIDCEndpoint(region string) string {
+	if region == "" {
+		region = defaultIDCRegion
+	}
+	return fmt.Sprintf("https://oidc.%s.amazonaws.com", region)
+}
+
+// promptInput prompts the user for input with an optional default value.
+func promptInput(prompt, defaultValue string) string {
+	reader := bufio.NewReader(os.Stdin)
+	if defaultValue != "" {
+		fmt.Printf("%s [%s]: ", prompt, defaultValue)
+	} else {
+		fmt.Printf("%s: ", prompt)
+	}
+	input, err := reader.ReadString('\n')
+	if err != nil {
+		log.Warnf("Error reading input: %v", err)
+		return defaultValue
+	}
+	input = strings.TrimSpace(input)
+	if input == "" {
+		return defaultValue
+	}
+	return input
+}
+
+// promptSelect prompts the user to select from options using number input.
+func promptSelect(prompt string, options []string) int {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		fmt.Println(prompt)
+		for i, opt := range options {
+			fmt.Printf("  %d) %s\n", i+1, opt)
+		}
+		fmt.Printf("Enter selection (1-%d): ", len(options))
+
+		input, err := reader.ReadString('\n')
+		if err != nil {
+			log.Warnf("Error reading input: %v", err)
+			return 0 // Default to first option on error
+		}
+		input = strings.TrimSpace(input)
+
+		// Parse the selection
+		var selection int
+		if _, err := fmt.Sscanf(input, "%d", &selection); err != nil || selection < 1 || selection > len(options) {
+			fmt.Printf("Invalid selection '%s'. Please enter a number between 1 and %d.\n\n", input, len(options))
+			continue
+		}
+		return selection - 1
+	}
+}
+
+// RegisterClientWithRegion registers a new OIDC client with AWS using a specific region.
+func (c *SSOOIDCClient) RegisterClientWithRegion(ctx context.Context, region string) (*RegisterClientResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]interface{}{
+		"clientName": "Kiro IDE",
+		"clientType": "public",
+		"scopes":     []string{"codewhisperer:completions", "codewhisperer:analysis", "codewhisperer:conversations", "codewhisperer:transformations", "codewhisperer:taskassist"},
+		"grantTypes": []string{"urn:ietf:params:oauth:grant-type:device_code", "refresh_token"},
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/client/register", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("register client failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("register client failed (status %d)", resp.StatusCode)
+	}
+
+	var result RegisterClientResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// StartDeviceAuthorizationWithIDC starts the device authorization flow for IDC.
+func (c *SSOOIDCClient) StartDeviceAuthorizationWithIDC(ctx context.Context, clientID, clientSecret, startURL, region string) (*StartDeviceAuthResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"startUrl":     startURL,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/device_authorization", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("start device auth failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("start device auth failed (status %d)", resp.StatusCode)
+	}
+
+	var result StartDeviceAuthResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// CreateTokenWithRegion polls for the access token after user authorization using a specific region.
+func (c *SSOOIDCClient) CreateTokenWithRegion(ctx context.Context, clientID, clientSecret, deviceCode, region string) (*CreateTokenResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"deviceCode":   deviceCode,
+		"grantType":    "urn:ietf:params:oauth:grant-type:device_code",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check for pending authorization
+	if resp.StatusCode == http.StatusBadRequest {
+		var errResp struct {
+			Error string `json:"error"`
+		}
+		if json.Unmarshal(respBody, &errResp) == nil {
+			if errResp.Error == "authorization_pending" {
+				return nil, ErrAuthorizationPending
+			}
+			if errResp.Error == "slow_down" {
+				return nil, ErrSlowDown
+			}
+		}
+		log.Debugf("create token failed: %s", string(respBody))
+		return nil, fmt.Errorf("create token failed")
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("create token failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("create token failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// RefreshTokenWithRegion refreshes an access token using the refresh token with a specific region.
+func (c *SSOOIDCClient) RefreshTokenWithRegion(ctx context.Context, clientID, clientSecret, refreshToken, region, startURL string) (*KiroTokenData, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"refreshToken": refreshToken,
+		"grantType":    "refresh_token",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+
+	// Set headers matching kiro2api's IDC token refresh
+	// These headers are required for successful IDC token refresh
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Host", fmt.Sprintf("oidc.%s.amazonaws.com", region))
+	req.Header.Set("Connection", "keep-alive")
+	req.Header.Set("x-amz-user-agent", idcAmzUserAgent)
+	req.Header.Set("Accept", "*/*")
+	req.Header.Set("Accept-Language", "*")
+	req.Header.Set("sec-fetch-mode", "cors")
+	req.Header.Set("User-Agent", "node")
+	req.Header.Set("Accept-Encoding", "br, gzip, deflate")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Warnf("IDC token refresh failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token refresh failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	expiresAt := time.Now().Add(time.Duration(result.ExpiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  result.AccessToken,
+		RefreshToken: result.RefreshToken,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "idc",
+		Provider:     "AWS",
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+		StartURL:     startURL,
+		Region:       region,
+	}, nil
+}
+
+// LoginWithIDC performs the full device code flow for AWS Identity Center (IDC).
+func (c *SSOOIDCClient) LoginWithIDC(ctx context.Context, startURL, region string) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║       Kiro Authentication (AWS Identity Center)          ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Step 1: Register client with the specified region
+	fmt.Println("\nRegistering client...")
+	regResp, err := c.RegisterClientWithRegion(ctx, region)
+	if err != nil {
+		return nil, fmt.Errorf("failed to register client: %w", err)
+	}
+	log.Debugf("Client registered: %s", regResp.ClientID)
+
+	// Step 2: Start device authorization with IDC start URL
+	fmt.Println("Starting device authorization...")
+	authResp, err := c.StartDeviceAuthorizationWithIDC(ctx, regResp.ClientID, regResp.ClientSecret, startURL, region)
+	if err != nil {
+		return nil, fmt.Errorf("failed to start device auth: %w", err)
+	}
+
+	// Step 3: Show user the verification URL
+	fmt.Printf("\n")
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("  Confirm the following code in the browser:\n")
+	fmt.Printf("  Code: %s\n", authResp.UserCode)
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("\n  Open this URL: %s\n\n", authResp.VerificationURIComplete)
+
+	// Set incognito mode based on config
+	if c.cfg != nil {
+		browser.SetIncognitoMode(c.cfg.IncognitoBrowser)
+		if !c.cfg.IncognitoBrowser {
+			log.Info("kiro: using normal browser mode (--no-incognito). Note: You may not be able to select a different account.")
+		} else {
+			log.Debug("kiro: using incognito mode for multi-account support")
+		}
+	} else {
+		browser.SetIncognitoMode(true)
+		log.Debug("kiro: using incognito mode for multi-account support (default)")
+	}
+
+	// Open browser
+	if err := browser.OpenURL(authResp.VerificationURIComplete); err != nil {
+		log.Warnf("Could not open browser automatically: %v", err)
+		fmt.Println("  Please open the URL manually in your browser.")
+	} else {
+		fmt.Println("  (Browser opened automatically)")
+	}
+
+	// Step 4: Poll for token
+	fmt.Println("Waiting for authorization...")
+
+	interval := pollInterval
+	if authResp.Interval > 0 {
+		interval = time.Duration(authResp.Interval) * time.Second
+	}
+
+	deadline := time.Now().Add(time.Duration(authResp.ExpiresIn) * time.Second)
+
+	for time.Now().Before(deadline) {
+		select {
+		case <-ctx.Done():
+			browser.CloseBrowser()
+			return nil, ctx.Err()
+		case <-time.After(interval):
+			tokenResp, err := c.CreateTokenWithRegion(ctx, regResp.ClientID, regResp.ClientSecret, authResp.DeviceCode, region)
+			if err != nil {
+				if errors.Is(err, ErrAuthorizationPending) {
+					fmt.Print(".")
+					continue
+				}
+				if errors.Is(err, ErrSlowDown) {
+					interval += 5 * time.Second
+					continue
+				}
+				browser.CloseBrowser()
+				return nil, fmt.Errorf("token creation failed: %w", err)
+			}
+
+			fmt.Println("\n\n✓ Authorization successful!")
+
+			// Close the browser window
+			if err := browser.CloseBrowser(); err != nil {
+				log.Debugf("Failed to close browser: %v", err)
+			}
+
+			// Step 5: Get profile ARN from CodeWhisperer API
+			fmt.Println("Fetching profile information...")
+			profileArn := c.fetchProfileArn(ctx, tokenResp.AccessToken)
+
+			// Fetch user email
+			email := FetchUserEmailWithFallback(ctx, c.cfg, tokenResp.AccessToken)
+			if email != "" {
+				fmt.Printf("  Logged in as: %s\n", email)
+			}
+
+			expiresAt := time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
+
+			return &KiroTokenData{
+				AccessToken:  tokenResp.AccessToken,
+				RefreshToken: tokenResp.RefreshToken,
+				ProfileArn:   profileArn,
+				ExpiresAt:    expiresAt.Format(time.RFC3339),
+				AuthMethod:   "idc",
+				Provider:     "AWS",
+				ClientID:     regResp.ClientID,
+				ClientSecret: regResp.ClientSecret,
+				Email:        email,
+				StartURL:     startURL,
+				Region:       region,
+			}, nil
+		}
+	}
+
+	// Close browser on timeout
+	if err := browser.CloseBrowser(); err != nil {
+		log.Debugf("Failed to close browser on timeout: %v", err)
+	}
+	return nil, fmt.Errorf("authorization timed out")
+}
+
+// LoginWithMethodSelection prompts the user to select between Builder ID and IDC, then performs the login.
+func (c *SSOOIDCClient) LoginWithMethodSelection(ctx context.Context) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║              Kiro Authentication (AWS)                    ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Prompt for login method
+	options := []string{
+		"Use with Builder ID (personal AWS account)",
+		"Use with IDC Account (organization SSO)",
+	}
+	selection := promptSelect("\n? Select login method:", options)
+
+	if selection == 0 {
+		// Builder ID flow - use existing implementation
+		return c.LoginWithBuilderID(ctx)
+	}
+
+	// IDC flow - prompt for start URL and region
+	fmt.Println()
+	startURL := promptInput("? Enter Start URL", "")
+	if startURL == "" {
+		return nil, fmt.Errorf("start URL is required for IDC login")
+	}
+
+	region := promptInput("? Enter Region", defaultIDCRegion)
+
+	return c.LoginWithIDC(ctx, startURL, region)
+}
+
 // RegisterClient registers a new OIDC client with AWS.
 func (c *SSOOIDCClient) RegisterClient(ctx context.Context) (*RegisterClientResponse, error) {
 	payload := map[string]interface{}{
@@ -211,10 +660,10 @@ func (c *SSOOIDCClient) CreateToken(ctx context.Context, clientID, clientSecret,
 		}
 		if json.Unmarshal(respBody, &errResp) == nil {
 			if errResp.Error == "authorization_pending" {
-				return nil, fmt.Errorf("authorization_pending")
+				return nil, ErrAuthorizationPending
 			}
 			if errResp.Error == "slow_down" {
-				return nil, fmt.Errorf("slow_down")
+				return nil, ErrSlowDown
 			}
 		}
 		log.Debugf("create token failed: %s", string(respBody))
@@ -359,12 +808,11 @@ func (c *SSOOIDCClient) LoginWithBuilderID(ctx context.Context) (*KiroTokenData,
 		case <-time.After(interval):
 			tokenResp, err := c.CreateToken(ctx, regResp.ClientID, regResp.ClientSecret, authResp.DeviceCode)
 			if err != nil {
-				errStr := err.Error()
-				if strings.Contains(errStr, "authorization_pending") {
+				if errors.Is(err, ErrAuthorizationPending) {
 					fmt.Print(".")
 					continue
 				}
-				if strings.Contains(errStr, "slow_down") {
+				if errors.Is(err, ErrSlowDown) {
 					interval += 5 * time.Second
 					continue
 				}

internal/config/config.go

@@ -39,6 +39,9 @@ type Config struct {
 	// Debug enables or disables debug-level logging and other debug features.
 	Debug bool `yaml:"debug" json:"debug"`
 
+	// CommercialMode disables high-overhead HTTP middleware features to minimize per-request memory usage.
+	CommercialMode bool `yaml:"commercial-mode" json:"commercial-mode"`
+
 	// LoggingToFile controls whether application logs are written to rotating files or stdout.
 	LoggingToFile bool `yaml:"logging-to-file" json:"logging-to-file"`
 
@@ -156,6 +159,11 @@ type AmpModelMapping struct {
 	// To is the target model name to route to (e.g., "claude-sonnet-4").
 	// The target model must have available providers in the registry.
 	To string `yaml:"to" json:"to"`
+
+	// Regex indicates whether the 'from' field should be interpreted as a regular
+	// expression for matching model names. When true, this mapping is evaluated
+	// after exact matches and in the order provided. Defaults to false (exact match).
+	Regex bool `yaml:"regex,omitempty" json:"regex,omitempty"`
 }
 
 // AmpCode groups Amp CLI integration settings including upstream routing,
@@ -401,7 +409,7 @@ func LoadConfigOptional(configFile string, optional bool) (*Config, error) {
 	cfg.DisableCooling = false
 	cfg.AmpCode.RestrictManagementToLocalhost = false // Default to false: API key auth is sufficient
 	cfg.RemoteManagement.PanelGitHubRepository = DefaultPanelGitHubRepository
-	cfg.IncognitoBrowser = false                     // Default to normal browser (AWS uses incognito by force)
+	cfg.IncognitoBrowser = false // Default to normal browser (AWS uses incognito by force)
 	if err = yaml.Unmarshal(data, &cfg); err != nil {
 		if optional {
 			// In cloud deploy mode, if YAML parsing fails, return empty config instead of error.

internal/config/sdk_config.go

@@ -22,6 +22,21 @@ type SDKConfig struct {
 
 	// Access holds request authentication provider configuration.
 	Access AccessConfig `yaml:"auth,omitempty" json:"auth,omitempty"`
+
+	// Streaming configures server-side streaming behavior (keep-alives and safe bootstrap retries).
+	Streaming StreamingConfig `yaml:"streaming" json:"streaming"`
+}
+
+// StreamingConfig holds server streaming behavior configuration.
+type StreamingConfig struct {
+	// KeepAliveSeconds controls how often the server emits SSE heartbeats (": keep-alive\n\n").
+	// nil means default (15 seconds). <= 0 disables keep-alives.
+	KeepAliveSeconds *int `yaml:"keepalive-seconds,omitempty" json:"keepalive-seconds,omitempty"`
+
+	// BootstrapRetries controls how many times the server may retry a streaming request before any bytes are sent,
+	// to allow auth rotation / transient recovery.
+	// nil means default (2). 0 disables bootstrap retries.
+	BootstrapRetries *int `yaml:"bootstrap-retries,omitempty" json:"bootstrap-retries,omitempty"`
 }
 
 // AccessConfig groups request authentication providers.

internal/logging/gin_logger.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"runtime/debug"
+	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -14,11 +15,24 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+// aiAPIPrefixes defines path prefixes for AI API requests that should have request ID tracking.
+var aiAPIPrefixes = []string{
+	"/v1/chat/completions",
+	"/v1/completions",
+	"/v1/messages",
+	"/v1/responses",
+	"/v1beta/models/",
+	"/api/provider/",
+}
+
 const skipGinLogKey = "__gin_skip_request_logging__"
 
 // GinLogrusLogger returns a Gin middleware handler that logs HTTP requests and responses
 // using logrus. It captures request details including method, path, status code, latency,
-// client IP, and any error messages, formatting them in a Gin-style log format.
+// client IP, and any error messages. Request ID is only added for AI API requests.
+//
+// Output format (AI API): [2025-12-23 20:14:10] [info ] | a1b2c3d4 | 200 |       23.559s | ...
+// Output format (others): [2025-12-23 20:14:10] [info ] | -------- | 200 |       23.559s | ...
 //
 // Returns:
 //   - gin.HandlerFunc: A middleware handler for request logging
@@ -28,6 +42,15 @@ func GinLogrusLogger() gin.HandlerFunc {
 		path := c.Request.URL.Path
 		raw := util.MaskSensitiveQuery(c.Request.URL.RawQuery)
 
+		// Only generate request ID for AI API paths
+		var requestID string
+		if isAIAPIPath(path) {
+			requestID = GenerateRequestID()
+			SetGinRequestID(c, requestID)
+			ctx := WithRequestID(c.Request.Context(), requestID)
+			c.Request = c.Request.WithContext(ctx)
+		}
+
 		c.Next()
 
 		if shouldSkipGinRequestLogging(c) {
@@ -49,23 +72,38 @@ func GinLogrusLogger() gin.HandlerFunc {
 		clientIP := c.ClientIP()
 		method := c.Request.Method
 		errorMessage := c.Errors.ByType(gin.ErrorTypePrivate).String()
-		timestamp := time.Now().Format("2006/01/02 - 15:04:05")
-		logLine := fmt.Sprintf("[GIN] %s | %3d | %13v | %15s | %-7s \"%s\"", timestamp, statusCode, latency, clientIP, method, path)
+
+		if requestID == "" {
+			requestID = "--------"
+		}
+		logLine := fmt.Sprintf("%3d | %13v | %15s | %-7s \"%s\"", statusCode, latency, clientIP, method, path)
 		if errorMessage != "" {
 			logLine = logLine + " | " + errorMessage
 		}
 
+		entry := log.WithField("request_id", requestID)
+
 		switch {
 		case statusCode >= http.StatusInternalServerError:
-			log.Error(logLine)
+			entry.Error(logLine)
 		case statusCode >= http.StatusBadRequest:
-			log.Warn(logLine)
+			entry.Warn(logLine)
 		default:
-			log.Info(logLine)
+			entry.Info(logLine)
 		}
 	}
 }
 
+// isAIAPIPath checks if the given path is an AI API endpoint that should have request ID tracking.
+func isAIAPIPath(path string) bool {
+	for _, prefix := range aiAPIPrefixes {
+		if strings.HasPrefix(path, prefix) {
+			return true
+		}
+	}
+	return false
+}
+
 // GinLogrusRecovery returns a Gin middleware handler that recovers from panics and logs
 // them using logrus. When a panic occurs, it captures the panic value, stack trace,
 // and request path, then returns a 500 Internal Server Error response to the client.

internal/logging/global_logger.go

@@ -24,7 +24,8 @@ var (
 )
 
 // LogFormatter defines a custom log format for logrus.
-// This formatter adds timestamp, level, and source location to each log entry.
+// This formatter adds timestamp, level, request ID, and source location to each log entry.
+// Format: [2025-12-23 20:14:04] [debug] [manager.go:524] | a1b2c3d4 | Use API key sk-9...0RHO for model gpt-5.2
 type LogFormatter struct{}
 
 // Format renders a single log entry with custom formatting.
@@ -38,16 +39,24 @@ func (m *LogFormatter) Format(entry *log.Entry) ([]byte, error) {
 
 	timestamp := entry.Time.Format("2006-01-02 15:04:05")
 	message := strings.TrimRight(entry.Message, "\r\n")
-	
-	// Handle nil Caller (can happen with some log entries)
-	callerFile := "unknown"
-	callerLine := 0
-	if entry.Caller != nil {
-		callerFile = filepath.Base(entry.Caller.File)
-		callerLine = entry.Caller.Line
+
+	reqID := "--------"
+	if id, ok := entry.Data["request_id"].(string); ok && id != "" {
+		reqID = id
+	}
+
+	level := entry.Level.String()
+	if level == "warning" {
+		level = "warn"
+	}
+	levelStr := fmt.Sprintf("%-5s", level)
+
+	var formatted string
+	if entry.Caller != nil {
+		formatted = fmt.Sprintf("[%s] [%s] [%s] [%s:%d] %s\n", timestamp, reqID, levelStr, filepath.Base(entry.Caller.File), entry.Caller.Line, message)
+	} else {
+		formatted = fmt.Sprintf("[%s] [%s] [%s] %s\n", timestamp, reqID, levelStr, message)
 	}
-	
-	formatted := fmt.Sprintf("[%s] [%s] [%s:%d] %s\n", timestamp, entry.Level, callerFile, callerLine, message)
 	buffer.WriteString(formatted)
 
 	return buffer.Bytes(), nil

internal/logging/request_logger.go

@@ -43,10 +43,11 @@ type RequestLogger interface {
 	//   - response: The raw response data
 	//   - apiRequest: The API request data
 	//   - apiResponse: The API response data
+	//   - requestID: Optional request ID for log file naming
 	//
 	// Returns:
 	//   - error: An error if logging fails, nil otherwise
-	LogRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage) error
+	LogRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, requestID string) error
 
 	// LogStreamingRequest initiates logging for a streaming request and returns a writer for chunks.
 	//
@@ -55,11 +56,12 @@ type RequestLogger interface {
 	//   - method: The HTTP method
 	//   - headers: The request headers
 	//   - body: The request body
+	//   - requestID: Optional request ID for log file naming
 	//
 	// Returns:
 	//   - StreamingLogWriter: A writer for streaming response chunks
 	//   - error: An error if logging initialization fails, nil otherwise
-	LogStreamingRequest(url, method string, headers map[string][]string, body []byte) (StreamingLogWriter, error)
+	LogStreamingRequest(url, method string, headers map[string][]string, body []byte, requestID string) (StreamingLogWriter, error)
 
 	// IsEnabled returns whether request logging is currently enabled.
 	//
@@ -177,20 +179,21 @@ func (l *FileRequestLogger) SetEnabled(enabled bool) {
 //   - response: The raw response data
 //   - apiRequest: The API request data
 //   - apiResponse: The API response data
+//   - requestID: Optional request ID for log file naming
 //
 // Returns:
 //   - error: An error if logging fails, nil otherwise
-func (l *FileRequestLogger) LogRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage) error {
-	return l.logRequest(url, method, requestHeaders, body, statusCode, responseHeaders, response, apiRequest, apiResponse, apiResponseErrors, false)
+func (l *FileRequestLogger) LogRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, requestID string) error {
+	return l.logRequest(url, method, requestHeaders, body, statusCode, responseHeaders, response, apiRequest, apiResponse, apiResponseErrors, false, requestID)
 }
 
 // LogRequestWithOptions logs a request with optional forced logging behavior.
 // The force flag allows writing error logs even when regular request logging is disabled.
-func (l *FileRequestLogger) LogRequestWithOptions(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, force bool) error {
-	return l.logRequest(url, method, requestHeaders, body, statusCode, responseHeaders, response, apiRequest, apiResponse, apiResponseErrors, force)
+func (l *FileRequestLogger) LogRequestWithOptions(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, force bool, requestID string) error {
+	return l.logRequest(url, method, requestHeaders, body, statusCode, responseHeaders, response, apiRequest, apiResponse, apiResponseErrors, force, requestID)
 }
 
-func (l *FileRequestLogger) logRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, force bool) error {
+func (l *FileRequestLogger) logRequest(url, method string, requestHeaders map[string][]string, body []byte, statusCode int, responseHeaders map[string][]string, response, apiRequest, apiResponse []byte, apiResponseErrors []*interfaces.ErrorMessage, force bool, requestID string) error {
 	if !l.enabled && !force {
 		return nil
 	}
@@ -200,10 +203,10 @@ func (l *FileRequestLogger) logRequest(url, method string, requestHeaders map[st
 		return fmt.Errorf("failed to create logs directory: %w", errEnsure)
 	}
 
-	// Generate filename
-	filename := l.generateFilename(url)
+	// Generate filename with request ID
+	filename := l.generateFilename(url, requestID)
 	if force && !l.enabled {
-		filename = l.generateErrorFilename(url)
+		filename = l.generateErrorFilename(url, requestID)
 	}
 	filePath := filepath.Join(l.logsDir, filename)
 
@@ -271,11 +274,12 @@ func (l *FileRequestLogger) logRequest(url, method string, requestHeaders map[st
 //   - method: The HTTP method
 //   - headers: The request headers
 //   - body: The request body
+//   - requestID: Optional request ID for log file naming
 //
 // Returns:
 //   - StreamingLogWriter: A writer for streaming response chunks
 //   - error: An error if logging initialization fails, nil otherwise
-func (l *FileRequestLogger) LogStreamingRequest(url, method string, headers map[string][]string, body []byte) (StreamingLogWriter, error) {
+func (l *FileRequestLogger) LogStreamingRequest(url, method string, headers map[string][]string, body []byte, requestID string) (StreamingLogWriter, error) {
 	if !l.enabled {
 		return &NoOpStreamingLogWriter{}, nil
 	}
@@ -285,8 +289,8 @@ func (l *FileRequestLogger) LogStreamingRequest(url, method string, headers map[
 		return nil, fmt.Errorf("failed to create logs directory: %w", err)
 	}
 
-	// Generate filename
-	filename := l.generateFilename(url)
+	// Generate filename with request ID
+	filename := l.generateFilename(url, requestID)
 	filePath := filepath.Join(l.logsDir, filename)
 
 	requestHeaders := make(map[string][]string, len(headers))
@@ -330,8 +334,8 @@ func (l *FileRequestLogger) LogStreamingRequest(url, method string, headers map[
 }
 
 // generateErrorFilename creates a filename with an error prefix to differentiate forced error logs.
-func (l *FileRequestLogger) generateErrorFilename(url string) string {
-	return fmt.Sprintf("error-%s", l.generateFilename(url))
+func (l *FileRequestLogger) generateErrorFilename(url string, requestID ...string) string {
+	return fmt.Sprintf("error-%s", l.generateFilename(url, requestID...))
 }
 
 // ensureLogsDir creates the logs directory if it doesn't exist.
@@ -346,13 +350,15 @@ func (l *FileRequestLogger) ensureLogsDir() error {
 }
 
 // generateFilename creates a sanitized filename from the URL path and current timestamp.
+// Format: v1-responses-2025-12-23T195811-a1b2c3d4.log
 //
 // Parameters:
 //   - url: The request URL
+//   - requestID: Optional request ID to include in filename
 //
 // Returns:
 //   - string: A sanitized filename for the log file
-func (l *FileRequestLogger) generateFilename(url string) string {
+func (l *FileRequestLogger) generateFilename(url string, requestID ...string) string {
 	// Extract path from URL
 	path := url
 	if strings.Contains(url, "?") {
@@ -368,12 +374,18 @@ func (l *FileRequestLogger) generateFilename(url string) string {
 	sanitized := l.sanitizeForFilename(path)
 
 	// Add timestamp
-	timestamp := time.Now().Format("2006-01-02T150405-.000000000")
-	timestamp = strings.Replace(timestamp, ".", "", -1)
+	timestamp := time.Now().Format("2006-01-02T150405")
 
-	id := requestLogID.Add(1)
+	// Use request ID if provided, otherwise use sequential ID
+	var idPart string
+	if len(requestID) > 0 && requestID[0] != "" {
+		idPart = requestID[0]
+	} else {
+		id := requestLogID.Add(1)
+		idPart = fmt.Sprintf("%d", id)
+	}
 
-	return fmt.Sprintf("%s-%s-%d.log", sanitized, timestamp, id)
+	return fmt.Sprintf("%s-%s-%s.log", sanitized, timestamp, idPart)
 }
 
 // sanitizeForFilename replaces characters that are not safe for filenames.

internal/logging/requestid.go

@@ -0,0 +1,61 @@
+package logging
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+
+	"github.com/gin-gonic/gin"
+)
+
+// requestIDKey is the context key for storing/retrieving request IDs.
+type requestIDKey struct{}
+
+// ginRequestIDKey is the Gin context key for request IDs.
+const ginRequestIDKey = "__request_id__"
+
+// GenerateRequestID creates a new 8-character hex request ID.
+func GenerateRequestID() string {
+	b := make([]byte, 4)
+	if _, err := rand.Read(b); err != nil {
+		return "00000000"
+	}
+	return hex.EncodeToString(b)
+}
+
+// WithRequestID returns a new context with the request ID attached.
+func WithRequestID(ctx context.Context, requestID string) context.Context {
+	return context.WithValue(ctx, requestIDKey{}, requestID)
+}
+
+// GetRequestID retrieves the request ID from the context.
+// Returns empty string if not found.
+func GetRequestID(ctx context.Context) string {
+	if ctx == nil {
+		return ""
+	}
+	if id, ok := ctx.Value(requestIDKey{}).(string); ok {
+		return id
+	}
+	return ""
+}
+
+// SetGinRequestID stores the request ID in the Gin context.
+func SetGinRequestID(c *gin.Context, requestID string) {
+	if c != nil {
+		c.Set(ginRequestIDKey, requestID)
+	}
+}
+
+// GetGinRequestID retrieves the request ID from the Gin context.
+func GetGinRequestID(c *gin.Context) string {
+	if c == nil {
+		return ""
+	}
+	if id, exists := c.Get(ginRequestIDKey); exists {
+		if s, ok := id.(string); ok {
+			return s
+		}
+	}
+	return ""
+}

internal/registry/model_definitions.go

@@ -727,6 +727,7 @@ func GetIFlowModels() []*ModelInfo {
 		{ID: "qwen3-max-preview", DisplayName: "Qwen3-Max-Preview", Description: "Qwen3 Max preview build", Created: 1757030400},
 		{ID: "kimi-k2-0905", DisplayName: "Kimi-K2-Instruct-0905", Description: "Moonshot Kimi K2 instruct 0905", Created: 1757030400},
 		{ID: "glm-4.6", DisplayName: "GLM-4.6", Description: "Zhipu GLM 4.6 general model", Created: 1759190400, Thinking: iFlowThinkingSupport},
+		{ID: "glm-4.7", DisplayName: "GLM-4.7", Description: "Zhipu GLM 4.7 general model", Created: 1766448000, Thinking: iFlowThinkingSupport},
 		{ID: "kimi-k2", DisplayName: "Kimi-K2", Description: "Moonshot Kimi K2 general model", Created: 1752192000},
 		{ID: "kimi-k2-thinking", DisplayName: "Kimi-K2-Thinking", Description: "Moonshot Kimi K2 thinking model", Created: 1762387200},
 		{ID: "deepseek-v3.2-chat", DisplayName: "DeepSeek-V3.2", Description: "DeepSeek V3.2 Chat", Created: 1764576000},
@@ -740,6 +741,7 @@ func GetIFlowModels() []*ModelInfo {
 		{ID: "qwen3-235b-a22b-instruct", DisplayName: "Qwen3-235B-A22B-Instruct", Description: "Qwen3 235B A22B Instruct", Created: 1753401600},
 		{ID: "qwen3-235b", DisplayName: "Qwen3-235B-A22B", Description: "Qwen3 235B A22B", Created: 1753401600},
 		{ID: "minimax-m2", DisplayName: "MiniMax-M2", Description: "MiniMax M2", Created: 1758672000},
+		{ID: "minimax-m2.1", DisplayName: "MiniMax-M2.1", Description: "MiniMax M2.1", Created: 1766448000},
 	}
 	models := make([]*ModelInfo, 0, len(entries))
 	for _, entry := range entries {

internal/runtime/executor/antigravity_executor.go

@@ -33,18 +33,18 @@ import (
 )
 
 const (
-	antigravityBaseURLDaily = "https://daily-cloudcode-pa.sandbox.googleapis.com"
-	// antigravityBaseURLAutopush     = "https://autopush-cloudcode-pa.sandbox.googleapis.com"
-	antigravityBaseURLProd     = "https://cloudcode-pa.googleapis.com"
-	antigravityCountTokensPath = "/v1internal:countTokens"
-	antigravityStreamPath      = "/v1internal:streamGenerateContent"
-	antigravityGeneratePath    = "/v1internal:generateContent"
-	antigravityModelsPath      = "/v1internal:fetchAvailableModels"
-	antigravityClientID        = "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com"
-	antigravityClientSecret    = "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"
-	defaultAntigravityAgent    = "antigravity/1.11.5 windows/amd64"
-	antigravityAuthType        = "antigravity"
-	refreshSkew                = 3000 * time.Second
+	antigravityBaseURLDaily        = "https://daily-cloudcode-pa.googleapis.com"
+	antigravitySandboxBaseURLDaily = "https://daily-cloudcode-pa.sandbox.googleapis.com"
+	antigravityBaseURLProd         = "https://cloudcode-pa.googleapis.com"
+	antigravityCountTokensPath     = "/v1internal:countTokens"
+	antigravityStreamPath          = "/v1internal:streamGenerateContent"
+	antigravityGeneratePath        = "/v1internal:generateContent"
+	antigravityModelsPath          = "/v1internal:fetchAvailableModels"
+	antigravityClientID            = "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com"
+	antigravityClientSecret        = "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"
+	defaultAntigravityAgent        = "antigravity/1.104.0 darwin/arm64"
+	antigravityAuthType            = "antigravity"
+	refreshSkew                    = 3000 * time.Second
 )
 
 var (
@@ -1156,7 +1156,7 @@ func antigravityBaseURLFallbackOrder(auth *cliproxyauth.Auth) []string {
 	}
 	return []string{
 		antigravityBaseURLDaily,
-		// antigravityBaseURLAutopush,
+		antigravitySandboxBaseURLDaily,
 		antigravityBaseURLProd,
 	}
 }

internal/runtime/executor/claude_executor.go

@@ -662,7 +662,14 @@ func decodeResponseBody(body io.ReadCloser, contentEncoding string) (io.ReadClos
 }
 
 func applyClaudeHeaders(r *http.Request, auth *cliproxyauth.Auth, apiKey string, stream bool, extraBetas []string) {
-	r.Header.Set("Authorization", "Bearer "+apiKey)
+	useAPIKey := auth != nil && auth.Attributes != nil && strings.TrimSpace(auth.Attributes["api_key"]) != ""
+	isAnthropicBase := r.URL != nil && strings.EqualFold(r.URL.Scheme, "https") && strings.EqualFold(r.URL.Host, "api.anthropic.com")
+	if isAnthropicBase && useAPIKey {
+		r.Header.Del("Authorization")
+		r.Header.Set("x-api-key", apiKey)
+	} else {
+		r.Header.Set("Authorization", "Bearer "+apiKey)
+	}
 	r.Header.Set("Content-Type", "application/json")
 
 	var ginHeaders http.Header

internal/runtime/executor/kiro_executor.go

@@ -10,6 +10,8 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 	"time"
@@ -43,10 +45,15 @@ const (
 	// Event Stream error type constants
 	ErrStreamFatal     = "fatal"     // Connection/authentication errors, not recoverable
 	ErrStreamMalformed = "malformed" // Format errors, data cannot be parsed
-	// kiroUserAgent matches amq2api format for User-Agent header
+	// kiroUserAgent matches amq2api format for User-Agent header (Amazon Q CLI style)
 	kiroUserAgent = "aws-sdk-rust/1.3.9 os/macos lang/rust/1.87.0"
-	// kiroFullUserAgent is the complete x-amz-user-agent header matching amq2api
+	// kiroFullUserAgent is the complete x-amz-user-agent header matching amq2api (Amazon Q CLI style)
 	kiroFullUserAgent = "aws-sdk-rust/1.3.9 ua/2.1 api/ssooidc/1.88.0 os/macos lang/rust/1.87.0 m/E app/AmazonQ-For-CLI"
+
+	// Kiro IDE style headers (from kiro2api - for IDC auth)
+	kiroIDEUserAgent     = "aws-sdk-js/1.0.18 ua/2.1 os/darwin#25.0.0 lang/js md/nodejs#20.16.0 api/codewhispererstreaming#1.0.18 m/E KiroIDE-0.2.13-66c23a8c5d15afabec89ef9954ef52a119f10d369df04d548fc6c1eac694b0d1"
+	kiroIDEAmzUserAgent  = "aws-sdk-js/1.0.18 KiroIDE-0.2.13-66c23a8c5d15afabec89ef9954ef52a119f10d369df04d548fc6c1eac694b0d1"
+	kiroIDEAgentModeSpec = "spec"
 )
 
 // Real-time usage estimation configuration
@@ -101,11 +108,24 @@ var kiroEndpointConfigs = []kiroEndpointConfig{
 
 // getKiroEndpointConfigs returns the list of Kiro API endpoint configurations to try in order.
 // Supports reordering based on "preferred_endpoint" in auth metadata/attributes.
+// For IDC auth method, automatically uses CodeWhisperer endpoint with CLI origin.
 func getKiroEndpointConfigs(auth *cliproxyauth.Auth) []kiroEndpointConfig {
 	if auth == nil {
 		return kiroEndpointConfigs
 	}
 
+	// For IDC auth, use CodeWhisperer endpoint with AI_EDITOR origin (same as Social auth)
+	// Based on kiro2api analysis: IDC tokens work with CodeWhisperer endpoint using Bearer auth
+	// The difference is only in how tokens are refreshed (OIDC with clientId/clientSecret for IDC)
+	// NOT in how API calls are made - both Social and IDC use the same endpoint/origin
+	if auth.Metadata != nil {
+		authMethod, _ := auth.Metadata["auth_method"].(string)
+		if authMethod == "idc" {
+			log.Debugf("kiro: IDC auth, using CodeWhisperer endpoint")
+			return kiroEndpointConfigs
+		}
+	}
+
 	// Check for preference
 	var preference string
 	if auth.Metadata != nil {
@@ -162,6 +182,15 @@ type KiroExecutor struct {
 	refreshMu sync.Mutex // Serializes token refresh operations to prevent race conditions
 }
 
+// isIDCAuth checks if the auth uses IDC (Identity Center) authentication method.
+func isIDCAuth(auth *cliproxyauth.Auth) bool {
+	if auth == nil || auth.Metadata == nil {
+		return false
+	}
+	authMethod, _ := auth.Metadata["auth_method"].(string)
+	return authMethod == "idc"
+}
+
 // buildKiroPayloadForFormat builds the Kiro API payload based on the source format.
 // This is critical because OpenAI and Claude formats have different tool structures:
 // - OpenAI: tools[].function.name, tools[].function.description
@@ -210,6 +239,10 @@ func (e *KiroExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req
 			log.Warnf("kiro: pre-request token refresh failed: %v", refreshErr)
 		} else if refreshedAuth != nil {
 			auth = refreshedAuth
+			// Persist the refreshed auth to file so subsequent requests use it
+			if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+				log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+			}
 			accessToken, profileArn = kiroCredentials(auth)
 			log.Infof("kiro: token refreshed successfully before request")
 		}
@@ -262,15 +295,28 @@ func (e *KiroExecutor) executeWithRetry(ctx context.Context, auth *cliproxyauth.
 			}
 
 			httpReq.Header.Set("Content-Type", kiroContentType)
-			httpReq.Header.Set("Authorization", "Bearer "+accessToken)
 			httpReq.Header.Set("Accept", kiroAcceptStream)
 			// Use endpoint-specific X-Amz-Target (critical for avoiding 403 errors)
 			httpReq.Header.Set("X-Amz-Target", endpointConfig.AmzTarget)
-			httpReq.Header.Set("User-Agent", kiroUserAgent)
-			httpReq.Header.Set("X-Amz-User-Agent", kiroFullUserAgent)
+
+			// Use different headers based on auth type
+			// IDC auth uses Kiro IDE style headers (from kiro2api)
+			// Other auth types use Amazon Q CLI style headers
+			if isIDCAuth(auth) {
+				httpReq.Header.Set("User-Agent", kiroIDEUserAgent)
+				httpReq.Header.Set("X-Amz-User-Agent", kiroIDEAmzUserAgent)
+				httpReq.Header.Set("x-amzn-kiro-agent-mode", kiroIDEAgentModeSpec)
+				log.Debugf("kiro: using Kiro IDE headers for IDC auth")
+			} else {
+				httpReq.Header.Set("User-Agent", kiroUserAgent)
+				httpReq.Header.Set("X-Amz-User-Agent", kiroFullUserAgent)
+			}
 			httpReq.Header.Set("Amz-Sdk-Request", "attempt=1; max=3")
 			httpReq.Header.Set("Amz-Sdk-Invocation-Id", uuid.New().String())
 
+			// Bearer token authentication for all auth types (Builder ID, IDC, social, etc.)
+			httpReq.Header.Set("Authorization", "Bearer "+accessToken)
+
 			var attrs map[string]string
 			if auth != nil {
 				attrs = auth.Attributes
@@ -358,6 +404,11 @@ func (e *KiroExecutor) executeWithRetry(ctx context.Context, auth *cliproxyauth.
 
 					if refreshedAuth != nil {
 						auth = refreshedAuth
+						// Persist the refreshed auth to file so subsequent requests use it
+						if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+							log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+							// Continue anyway - the token is valid for this request
+						}
 						accessToken, profileArn = kiroCredentials(auth)
 						// Rebuild payload with new profile ARN if changed
 						kiroPayload, _ = buildKiroPayloadForFormat(body, kiroModelID, profileArn, currentOrigin, isAgentic, isChatOnly, from, opts.Headers)
@@ -416,6 +467,11 @@ func (e *KiroExecutor) executeWithRetry(ctx context.Context, auth *cliproxyauth.
 					}
 					if refreshedAuth != nil {
 						auth = refreshedAuth
+						// Persist the refreshed auth to file so subsequent requests use it
+						if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+							log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+							// Continue anyway - the token is valid for this request
+						}
 						accessToken, profileArn = kiroCredentials(auth)
 						kiroPayload, _ = buildKiroPayloadForFormat(body, kiroModelID, profileArn, currentOrigin, isAgentic, isChatOnly, from, opts.Headers)
 						log.Infof("kiro: token refreshed for 403, retrying request")
@@ -518,6 +574,10 @@ func (e *KiroExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Aut
 			log.Warnf("kiro: pre-request token refresh failed: %v", refreshErr)
 		} else if refreshedAuth != nil {
 			auth = refreshedAuth
+			// Persist the refreshed auth to file so subsequent requests use it
+			if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+				log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+			}
 			accessToken, profileArn = kiroCredentials(auth)
 			log.Infof("kiro: token refreshed successfully before stream request")
 		}
@@ -568,15 +628,28 @@ func (e *KiroExecutor) executeStreamWithRetry(ctx context.Context, auth *cliprox
 			}
 
 			httpReq.Header.Set("Content-Type", kiroContentType)
-			httpReq.Header.Set("Authorization", "Bearer "+accessToken)
 			httpReq.Header.Set("Accept", kiroAcceptStream)
 			// Use endpoint-specific X-Amz-Target (critical for avoiding 403 errors)
 			httpReq.Header.Set("X-Amz-Target", endpointConfig.AmzTarget)
-			httpReq.Header.Set("User-Agent", kiroUserAgent)
-			httpReq.Header.Set("X-Amz-User-Agent", kiroFullUserAgent)
+
+			// Use different headers based on auth type
+			// IDC auth uses Kiro IDE style headers (from kiro2api)
+			// Other auth types use Amazon Q CLI style headers
+			if isIDCAuth(auth) {
+				httpReq.Header.Set("User-Agent", kiroIDEUserAgent)
+				httpReq.Header.Set("X-Amz-User-Agent", kiroIDEAmzUserAgent)
+				httpReq.Header.Set("x-amzn-kiro-agent-mode", kiroIDEAgentModeSpec)
+				log.Debugf("kiro: using Kiro IDE headers for IDC auth")
+			} else {
+				httpReq.Header.Set("User-Agent", kiroUserAgent)
+				httpReq.Header.Set("X-Amz-User-Agent", kiroFullUserAgent)
+			}
 			httpReq.Header.Set("Amz-Sdk-Request", "attempt=1; max=3")
 			httpReq.Header.Set("Amz-Sdk-Invocation-Id", uuid.New().String())
 
+			// Bearer token authentication for all auth types (Builder ID, IDC, social, etc.)
+			httpReq.Header.Set("Authorization", "Bearer "+accessToken)
+
 			var attrs map[string]string
 			if auth != nil {
 				attrs = auth.Attributes
@@ -677,6 +750,11 @@ func (e *KiroExecutor) executeStreamWithRetry(ctx context.Context, auth *cliprox
 
 					if refreshedAuth != nil {
 						auth = refreshedAuth
+						// Persist the refreshed auth to file so subsequent requests use it
+						if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+							log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+							// Continue anyway - the token is valid for this request
+						}
 						accessToken, profileArn = kiroCredentials(auth)
 						// Rebuild payload with new profile ARN if changed
 						kiroPayload, _ = buildKiroPayloadForFormat(body, kiroModelID, profileArn, currentOrigin, isAgentic, isChatOnly, from, opts.Headers)
@@ -735,6 +813,11 @@ func (e *KiroExecutor) executeStreamWithRetry(ctx context.Context, auth *cliprox
 					}
 					if refreshedAuth != nil {
 						auth = refreshedAuth
+						// Persist the refreshed auth to file so subsequent requests use it
+						if persistErr := e.persistRefreshedAuth(auth); persistErr != nil {
+							log.Warnf("kiro: failed to persist refreshed auth: %v", persistErr)
+							// Continue anyway - the token is valid for this request
+						}
 						accessToken, profileArn = kiroCredentials(auth)
 						kiroPayload, _ = buildKiroPayloadForFormat(body, kiroModelID, profileArn, currentOrigin, isAgentic, isChatOnly, from, opts.Headers)
 						log.Infof("kiro: token refreshed for 403, retrying stream request")
@@ -1001,12 +1084,12 @@ func getEffectiveProfileArn(auth *cliproxyauth.Auth, profileArn string) string {
 // This consolidates the auth_method check that was previously done separately.
 func getEffectiveProfileArnWithWarning(auth *cliproxyauth.Auth, profileArn string) string {
 	if auth != nil && auth.Metadata != nil {
-		if authMethod, ok := auth.Metadata["auth_method"].(string); ok && authMethod == "builder-id" {
-			// builder-id auth doesn't need profileArn
+		if authMethod, ok := auth.Metadata["auth_method"].(string); ok && (authMethod == "builder-id" || authMethod == "idc") {
+			// builder-id and idc auth don't need profileArn
 			return ""
 		}
 	}
-	// For non-builder-id auth (social auth), profileArn is required
+	// For non-builder-id/idc auth (social auth), profileArn is required
 	if profileArn == "" {
 		log.Warnf("kiro: profile ARN not found in auth, API calls may fail")
 	}
@@ -3010,6 +3093,7 @@ func (e *KiroExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*c
 	var refreshToken string
 	var clientID, clientSecret string
 	var authMethod string
+	var region, startURL string
 
 	if auth.Metadata != nil {
 		if rt, ok := auth.Metadata["refresh_token"].(string); ok {
@@ -3024,6 +3108,12 @@ func (e *KiroExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*c
 		if am, ok := auth.Metadata["auth_method"].(string); ok {
 			authMethod = am
 		}
+		if r, ok := auth.Metadata["region"].(string); ok {
+			region = r
+		}
+		if su, ok := auth.Metadata["start_url"].(string); ok {
+			startURL = su
+		}
 	}
 
 	if refreshToken == "" {
@@ -3033,12 +3123,20 @@ func (e *KiroExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*c
 	var tokenData *kiroauth.KiroTokenData
 	var err error
 
-	// Use SSO OIDC refresh for AWS Builder ID, otherwise use Kiro's OAuth refresh endpoint
-	if clientID != "" && clientSecret != "" && authMethod == "builder-id" {
+	ssoClient := kiroauth.NewSSOOIDCClient(e.cfg)
+
+	// Use SSO OIDC refresh for AWS Builder ID or IDC, otherwise use Kiro's OAuth refresh endpoint
+	switch {
+	case clientID != "" && clientSecret != "" && authMethod == "idc" && region != "":
+		// IDC refresh with region-specific endpoint
+		log.Debugf("kiro executor: using SSO OIDC refresh for IDC (region=%s)", region)
+		tokenData, err = ssoClient.RefreshTokenWithRegion(ctx, clientID, clientSecret, refreshToken, region, startURL)
+	case clientID != "" && clientSecret != "" && authMethod == "builder-id":
+		// Builder ID refresh with default endpoint
 		log.Debugf("kiro executor: using SSO OIDC refresh for AWS Builder ID")
-		ssoClient := kiroauth.NewSSOOIDCClient(e.cfg)
 		tokenData, err = ssoClient.RefreshToken(ctx, clientID, clientSecret, refreshToken)
-	} else {
+	default:
+		// Fallback to Kiro's OAuth refresh endpoint (for social auth: Google/GitHub)
 		log.Debugf("kiro executor: using Kiro OAuth refresh endpoint")
 		oauth := kiroauth.NewKiroOAuth(e.cfg)
 		tokenData, err = oauth.RefreshToken(ctx, refreshToken)
@@ -3094,6 +3192,53 @@ func (e *KiroExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*c
 	return updated, nil
 }
 
+// persistRefreshedAuth persists a refreshed auth record to disk.
+// This ensures token refreshes from inline retry are saved to the auth file.
+func (e *KiroExecutor) persistRefreshedAuth(auth *cliproxyauth.Auth) error {
+	if auth == nil || auth.Metadata == nil {
+		return fmt.Errorf("kiro executor: cannot persist nil auth or metadata")
+	}
+
+	// Determine the file path from auth attributes or filename
+	var authPath string
+	if auth.Attributes != nil {
+		if p := strings.TrimSpace(auth.Attributes["path"]); p != "" {
+			authPath = p
+		}
+	}
+	if authPath == "" {
+		fileName := strings.TrimSpace(auth.FileName)
+		if fileName == "" {
+			return fmt.Errorf("kiro executor: auth has no file path or filename")
+		}
+		if filepath.IsAbs(fileName) {
+			authPath = fileName
+		} else if e.cfg != nil && e.cfg.AuthDir != "" {
+			authPath = filepath.Join(e.cfg.AuthDir, fileName)
+		} else {
+			return fmt.Errorf("kiro executor: cannot determine auth file path")
+		}
+	}
+
+	// Marshal metadata to JSON
+	raw, err := json.Marshal(auth.Metadata)
+	if err != nil {
+		return fmt.Errorf("kiro executor: marshal metadata failed: %w", err)
+	}
+
+	// Write to temp file first, then rename (atomic write)
+	tmp := authPath + ".tmp"
+	if err := os.WriteFile(tmp, raw, 0o600); err != nil {
+		return fmt.Errorf("kiro executor: write temp auth file failed: %w", err)
+	}
+	if err := os.Rename(tmp, authPath); err != nil {
+		return fmt.Errorf("kiro executor: rename auth file failed: %w", err)
+	}
+
+	log.Debugf("kiro executor: persisted refreshed auth to %s", authPath)
+	return nil
+}
+
 // isTokenExpired checks if a JWT access token has expired.
 // Returns true if the token is expired or cannot be parsed.
 func (e *KiroExecutor) isTokenExpired(accessToken string) bool {

internal/runtime/executor/usage_helpers.go

@@ -19,7 +19,7 @@ type usageReporter struct {
 	provider    string
 	model       string
 	authID      string
-	authIndex   uint64
+	authIndex   string
 	apiKey      string
 	source      string
 	requestedAt time.Time
@@ -275,6 +275,20 @@ func parseClaudeStreamUsage(line []byte) (usage.Detail, bool) {
 	return detail, true
 }
 
+func parseGeminiFamilyUsageDetail(node gjson.Result) usage.Detail {
+	detail := usage.Detail{
+		InputTokens:     node.Get("promptTokenCount").Int(),
+		OutputTokens:    node.Get("candidatesTokenCount").Int(),
+		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
+		TotalTokens:     node.Get("totalTokenCount").Int(),
+		CachedTokens:    node.Get("cachedContentTokenCount").Int(),
+	}
+	if detail.TotalTokens == 0 {
+		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
+	}
+	return detail
+}
+
 func parseGeminiCLIUsage(data []byte) usage.Detail {
 	usageNode := gjson.ParseBytes(data)
 	node := usageNode.Get("response.usageMetadata")
@@ -284,16 +298,7 @@ func parseGeminiCLIUsage(data []byte) usage.Detail {
 	if !node.Exists() {
 		return usage.Detail{}
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail
+	return parseGeminiFamilyUsageDetail(node)
 }
 
 func parseGeminiUsage(data []byte) usage.Detail {
@@ -305,16 +310,7 @@ func parseGeminiUsage(data []byte) usage.Detail {
 	if !node.Exists() {
 		return usage.Detail{}
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail
+	return parseGeminiFamilyUsageDetail(node)
 }
 
 func parseGeminiStreamUsage(line []byte) (usage.Detail, bool) {
@@ -329,16 +325,7 @@ func parseGeminiStreamUsage(line []byte) (usage.Detail, bool) {
 	if !node.Exists() {
 		return usage.Detail{}, false
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail, true
+	return parseGeminiFamilyUsageDetail(node), true
 }
 
 func parseGeminiCLIStreamUsage(line []byte) (usage.Detail, bool) {
@@ -353,16 +340,7 @@ func parseGeminiCLIStreamUsage(line []byte) (usage.Detail, bool) {
 	if !node.Exists() {
 		return usage.Detail{}, false
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail, true
+	return parseGeminiFamilyUsageDetail(node), true
 }
 
 func parseAntigravityUsage(data []byte) usage.Detail {
@@ -377,16 +355,7 @@ func parseAntigravityUsage(data []byte) usage.Detail {
 	if !node.Exists() {
 		return usage.Detail{}
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail
+	return parseGeminiFamilyUsageDetail(node)
 }
 
 func parseAntigravityStreamUsage(line []byte) (usage.Detail, bool) {
@@ -404,16 +373,7 @@ func parseAntigravityStreamUsage(line []byte) (usage.Detail, bool) {
 	if !node.Exists() {
 		return usage.Detail{}, false
 	}
-	detail := usage.Detail{
-		InputTokens:     node.Get("promptTokenCount").Int(),
-		OutputTokens:    node.Get("candidatesTokenCount").Int(),
-		ReasoningTokens: node.Get("thoughtsTokenCount").Int(),
-		TotalTokens:     node.Get("totalTokenCount").Int(),
-	}
-	if detail.TotalTokens == 0 {
-		detail.TotalTokens = detail.InputTokens + detail.OutputTokens + detail.ReasoningTokens
-	}
-	return detail, true
+	return parseGeminiFamilyUsageDetail(node), true
 }
 
 var stopChunkWithoutUsage sync.Map

internal/translator/antigravity/claude/antigravity_claude_request.go

@@ -86,6 +86,10 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 				hasSystemInstruction = true
 			}
 		}
+	} else if systemResult.Type == gjson.String {
+		systemInstructionJSON = `{"role":"user","parts":[{"text":""}]}`
+		systemInstructionJSON, _ = sjson.Set(systemInstructionJSON, "parts.0.text", systemResult.String())
+		hasSystemInstruction = true
 	}
 
 	// contents
@@ -121,32 +125,31 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 						// Use GetThinkingText to handle wrapped thinking objects
 						thinkingText := util.GetThinkingText(contentResult)
 						signatureResult := contentResult.Get("signature")
-					clientSignature := ""
-					if signatureResult.Exists() && signatureResult.String() != "" {
-						clientSignature = signatureResult.String()
-					}
-
-					// Always try cached signature first (more reliable than client-provided)
-					// Client may send stale or invalid signatures from different sessions
-					signature := ""
-					if sessionID != "" && thinkingText != "" {
-						if cachedSig := cache.GetCachedSignature(sessionID, thinkingText); cachedSig != "" {
-							signature = cachedSig
-							log.Debugf("Using cached signature for thinking block")
+						clientSignature := ""
+						if signatureResult.Exists() && signatureResult.String() != "" {
+							clientSignature = signatureResult.String()
 						}
-					}
 
-					// 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")
-					}
+						// Always try cached signature first (more reliable than client-provided)
+						// Client may send stale or invalid signatures from different sessions
+						signature := ""
+						if sessionID != "" && thinkingText != "" {
+							if cachedSig := cache.GetCachedSignature(sessionID, thinkingText); cachedSig != "" {
+								signature = cachedSig
+								log.Debugf("Using cached signature for thinking block")
+							}
+						}
 
-					// Store for subsequent tool_use in the same message
-					if cache.HasValidSignature(signature) {
-						currentMessageThinkingSignature = signature
-					}
+						// 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")
+						}
 
+						// Store for subsequent tool_use in the same message
+						if cache.HasValidSignature(signature) {
+							currentMessageThinkingSignature = signature
+						}
 
 						// Skip trailing unsigned thinking blocks on last assistant message
 						isUnsigned := !cache.HasValidSignature(signature)
@@ -321,6 +324,7 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 	// tools
 	toolsJSON := ""
 	toolDeclCount := 0
+	allowedToolKeys := []string{"name", "description", "behavior", "parameters", "parametersJsonSchema", "response", "responseJsonSchema"}
 	toolsResult := gjson.GetBytes(rawJSON, "tools")
 	if toolsResult.IsArray() {
 		toolsJSON = `[{"functionDeclarations":[]}]`
@@ -333,10 +337,12 @@ func ConvertClaudeRequestToAntigravity(modelName string, inputRawJSON []byte, _
 				inputSchema := util.CleanJSONSchemaForAntigravity(inputSchemaResult.Raw)
 				tool, _ := sjson.Delete(toolResult.Raw, "input_schema")
 				tool, _ = sjson.SetRaw(tool, "parametersJsonSchema", inputSchema)
-				tool, _ = sjson.Delete(tool, "strict")
-				tool, _ = sjson.Delete(tool, "input_examples")
-				tool, _ = sjson.Delete(tool, "type")
-				tool, _ = sjson.Delete(tool, "cache_control")
+				for toolKey := range gjson.Parse(tool).Map() {
+					if util.InArray(allowedToolKeys, toolKey) {
+						continue
+					}
+					tool, _ = sjson.Delete(tool, toolKey)
+				}
 				toolsJSON, _ = sjson.SetRaw(toolsJSON, "0.functionDeclarations.-1", tool)
 				toolDeclCount++
 			}

internal/translator/antigravity/claude/antigravity_claude_response.go

@@ -35,6 +35,7 @@ type Params struct {
 	CandidatesTokenCount int64  // Cached candidate token count from usage metadata
 	ThoughtsTokenCount   int64  // Cached thinking token count from usage metadata
 	TotalTokenCount      int64  // Cached total token count from usage metadata
+	CachedTokenCount     int64  // Cached content token count (indicates prompt caching)
 	HasSentFinalEvents   bool   // Indicates if final content/message events have been sent
 	HasToolUse           bool   // Indicates if tool use was observed in the stream
 	HasContent           bool   // Tracks whether any content (text, thinking, or tool use) has been output
@@ -270,7 +271,8 @@ func ConvertAntigravityResponseToClaude(_ context.Context, _ string, originalReq
 
 	if usageResult := gjson.GetBytes(rawJSON, "response.usageMetadata"); usageResult.Exists() {
 		params.HasUsageMetadata = true
-		params.PromptTokenCount = usageResult.Get("promptTokenCount").Int()
+		params.CachedTokenCount = usageResult.Get("cachedContentTokenCount").Int()
+		params.PromptTokenCount = usageResult.Get("promptTokenCount").Int() - params.CachedTokenCount
 		params.CandidatesTokenCount = usageResult.Get("candidatesTokenCount").Int()
 		params.ThoughtsTokenCount = usageResult.Get("thoughtsTokenCount").Int()
 		params.TotalTokenCount = usageResult.Get("totalTokenCount").Int()
@@ -322,6 +324,14 @@ func appendFinalEvents(params *Params, output *string, force bool) {
 	*output = *output + "event: message_delta\n"
 	*output = *output + "data: "
 	delta := fmt.Sprintf(`{"type":"message_delta","delta":{"stop_reason":"%s","stop_sequence":null},"usage":{"input_tokens":%d,"output_tokens":%d}}`, stopReason, params.PromptTokenCount, usageOutputTokens)
+	// Add cache_read_input_tokens if cached tokens are present (indicates prompt caching is working)
+	if params.CachedTokenCount > 0 {
+		var err error
+		delta, err = sjson.Set(delta, "usage.cache_read_input_tokens", params.CachedTokenCount)
+		if err != nil {
+			log.Warnf("antigravity claude response: failed to set cache_read_input_tokens: %v", err)
+		}
+	}
 	*output = *output + delta + "\n\n\n"
 
 	params.HasSentFinalEvents = true
@@ -361,6 +371,7 @@ func ConvertAntigravityResponseToClaudeNonStream(_ context.Context, _ string, or
 	candidateTokens := root.Get("response.usageMetadata.candidatesTokenCount").Int()
 	thoughtTokens := root.Get("response.usageMetadata.thoughtsTokenCount").Int()
 	totalTokens := root.Get("response.usageMetadata.totalTokenCount").Int()
+	cachedTokens := root.Get("response.usageMetadata.cachedContentTokenCount").Int()
 	outputTokens := candidateTokens + thoughtTokens
 	if outputTokens == 0 && totalTokens > 0 {
 		outputTokens = totalTokens - promptTokens
@@ -374,6 +385,14 @@ func ConvertAntigravityResponseToClaudeNonStream(_ context.Context, _ string, or
 	responseJSON, _ = sjson.Set(responseJSON, "model", root.Get("response.modelVersion").String())
 	responseJSON, _ = sjson.Set(responseJSON, "usage.input_tokens", promptTokens)
 	responseJSON, _ = sjson.Set(responseJSON, "usage.output_tokens", outputTokens)
+	// Add cache_read_input_tokens if cached tokens are present (indicates prompt caching is working)
+	if cachedTokens > 0 {
+		var err error
+		responseJSON, err = sjson.Set(responseJSON, "usage.cache_read_input_tokens", cachedTokens)
+		if err != nil {
+			log.Warnf("antigravity claude response: failed to set cache_read_input_tokens: %v", err)
+		}
+	}
 
 	contentArrayInitialized := false
 	ensureContentArray := func() {

internal/translator/antigravity/openai/chat-completions/antigravity_openai_request.go

@@ -249,8 +249,28 @@ func ConvertOpenAIRequestToAntigravity(modelName string, inputRawJSON []byte, _
 				p := 0
 				if content.Type == gjson.String {
 					node, _ = sjson.SetBytes(node, "parts.-1.text", content.String())
-					out, _ = sjson.SetRawBytes(out, "request.contents.-1", node)
 					p++
+				} else if content.IsArray() {
+					// Assistant multimodal content (e.g. text + image) -> single model content with parts
+					for _, item := range content.Array() {
+						switch item.Get("type").String() {
+						case "text":
+							p++
+						case "image_url":
+							// If the assistant returned an inline data URL, preserve it for history fidelity.
+							imageURL := item.Get("image_url.url").String()
+							if len(imageURL) > 5 { // expect data:...
+								pieces := strings.SplitN(imageURL[5:], ";", 2)
+								if len(pieces) == 2 && len(pieces[1]) > 7 {
+									mime := pieces[0]
+									data := pieces[1][7:]
+									node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".inlineData.mime_type", mime)
+									node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".inlineData.data", data)
+									p++
+								}
+							}
+						}
+					}
 				}
 
 				// Tool calls -> single model content with functionCall parts
@@ -266,7 +286,11 @@ func ConvertOpenAIRequestToAntigravity(modelName string, inputRawJSON []byte, _
 						fargs := tc.Get("function.arguments").String()
 						node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".functionCall.id", fid)
 						node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".functionCall.name", fname)
-						node, _ = sjson.SetRawBytes(node, "parts."+itoa(p)+".functionCall.args", []byte(fargs))
+						if gjson.Valid(fargs) {
+							node, _ = sjson.SetRawBytes(node, "parts."+itoa(p)+".functionCall.args", []byte(fargs))
+						} else {
+							node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".functionCall.args.params", []byte(fargs))
+						}
 						node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".thoughtSignature", geminiCLIFunctionThoughtSignature)
 						p++
 						if fid != "" {
@@ -301,6 +325,8 @@ func ConvertOpenAIRequestToAntigravity(modelName string, inputRawJSON []byte, _
 					if pp > 0 {
 						out, _ = sjson.SetRawBytes(out, "request.contents.-1", toolNode)
 					}
+				} else {
+					out, _ = sjson.SetRawBytes(out, "request.contents.-1", node)
 				}
 			}
 		}

internal/translator/antigravity/openai/chat-completions/antigravity_openai_response.go

@@ -13,6 +13,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	log "github.com/sirupsen/logrus"
+
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/translator/gemini/openai/chat-completions"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
@@ -85,18 +87,27 @@ func ConvertAntigravityResponseToOpenAI(_ context.Context, _ string, originalReq
 
 	// Extract and set usage metadata (token counts).
 	if usageResult := gjson.GetBytes(rawJSON, "response.usageMetadata"); usageResult.Exists() {
+		cachedTokenCount := usageResult.Get("cachedContentTokenCount").Int()
 		if candidatesTokenCountResult := usageResult.Get("candidatesTokenCount"); candidatesTokenCountResult.Exists() {
 			template, _ = sjson.Set(template, "usage.completion_tokens", candidatesTokenCountResult.Int())
 		}
 		if totalTokenCountResult := usageResult.Get("totalTokenCount"); totalTokenCountResult.Exists() {
 			template, _ = sjson.Set(template, "usage.total_tokens", totalTokenCountResult.Int())
 		}
-		promptTokenCount := usageResult.Get("promptTokenCount").Int()
+		promptTokenCount := usageResult.Get("promptTokenCount").Int() - cachedTokenCount
 		thoughtsTokenCount := usageResult.Get("thoughtsTokenCount").Int()
 		template, _ = sjson.Set(template, "usage.prompt_tokens", promptTokenCount+thoughtsTokenCount)
 		if thoughtsTokenCount > 0 {
 			template, _ = sjson.Set(template, "usage.completion_tokens_details.reasoning_tokens", thoughtsTokenCount)
 		}
+		// Include cached token count if present (indicates prompt caching is working)
+		if cachedTokenCount > 0 {
+			var err error
+			template, err = sjson.Set(template, "usage.prompt_tokens_details.cached_tokens", cachedTokenCount)
+			if err != nil {
+				log.Warnf("antigravity openai response: failed to set cached_tokens: %v", err)
+			}
+		}
 	}
 
 	// Process the main content part of the response.
@@ -170,12 +181,14 @@ func ConvertAntigravityResponseToOpenAI(_ context.Context, _ string, originalReq
 					mimeType = "image/png"
 				}
 				imageURL := fmt.Sprintf("data:%s;base64,%s", mimeType, data)
-				imagePayload := `{"image_url":{"url":""},"type":"image_url"}`
-				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				imagesResult := gjson.Get(template, "choices.0.delta.images")
 				if !imagesResult.Exists() || !imagesResult.IsArray() {
 					template, _ = sjson.SetRaw(template, "choices.0.delta.images", `[]`)
 				}
+				imageIndex := len(gjson.Get(template, "choices.0.delta.images").Array())
+				imagePayload := `{"type":"image_url","image_url":{"url":""}}`
+				imagePayload, _ = sjson.Set(imagePayload, "index", imageIndex)
+				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				template, _ = sjson.Set(template, "choices.0.delta.role", "assistant")
 				template, _ = sjson.SetRaw(template, "choices.0.delta.images.-1", imagePayload)
 			}

internal/translator/gemini-cli/claude/gemini-cli_claude_request.go

@@ -62,6 +62,8 @@ func ConvertClaudeRequestToCLI(modelName string, inputRawJSON []byte, _ bool) []
 		if hasSystemParts {
 			out, _ = sjson.SetRaw(out, "request.systemInstruction", systemInstruction)
 		}
+	} else if systemResult.Type == gjson.String {
+		out, _ = sjson.Set(out, "request.systemInstruction.parts.-1.text", systemResult.String())
 	}
 
 	// contents

internal/translator/gemini-cli/openai/chat-completions/gemini-cli_openai_request.go

@@ -218,8 +218,29 @@ func ConvertOpenAIRequestToGeminiCLI(modelName string, inputRawJSON []byte, _ bo
 				if content.Type == gjson.String {
 					// Assistant text -> single model content
 					node, _ = sjson.SetBytes(node, "parts.-1.text", content.String())
-					out, _ = sjson.SetRawBytes(out, "request.contents.-1", node)
 					p++
+				} else if content.IsArray() {
+					// Assistant multimodal content (e.g. text + image) -> single model content with parts
+					for _, item := range content.Array() {
+						switch item.Get("type").String() {
+						case "text":
+							node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".text", item.Get("text").String())
+							p++
+						case "image_url":
+							// If the assistant returned an inline data URL, preserve it for history fidelity.
+							imageURL := item.Get("image_url.url").String()
+							if len(imageURL) > 5 { // expect data:...
+								pieces := strings.SplitN(imageURL[5:], ";", 2)
+								if len(pieces) == 2 && len(pieces[1]) > 7 {
+									mime := pieces[0]
+									data := pieces[1][7:]
+									node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".inlineData.mime_type", mime)
+									node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".inlineData.data", data)
+									p++
+								}
+							}
+						}
+					}
 				}
 
 				// Tool calls -> single model content with functionCall parts
@@ -244,7 +265,7 @@ func ConvertOpenAIRequestToGeminiCLI(modelName string, inputRawJSON []byte, _ bo
 					out, _ = sjson.SetRawBytes(out, "request.contents.-1", node)
 
 					// Append a single tool content combining name + response per function
-					toolNode := []byte(`{"role":"tool","parts":[]}`)
+					toolNode := []byte(`{"role":"user","parts":[]}`)
 					pp := 0
 					for _, fid := range fIDs {
 						if name, ok := tcID2Name[fid]; ok {
@@ -260,6 +281,8 @@ func ConvertOpenAIRequestToGeminiCLI(modelName string, inputRawJSON []byte, _ bo
 					if pp > 0 {
 						out, _ = sjson.SetRawBytes(out, "request.contents.-1", toolNode)
 					}
+				} else {
+					out, _ = sjson.SetRawBytes(out, "request.contents.-1", node)
 				}
 			}
 		}

internal/translator/gemini-cli/openai/chat-completions/gemini-cli_openai_response.go

@@ -170,12 +170,14 @@ func ConvertCliResponseToOpenAI(_ context.Context, _ string, originalRequestRawJ
 					mimeType = "image/png"
 				}
 				imageURL := fmt.Sprintf("data:%s;base64,%s", mimeType, data)
-				imagePayload := `{"image_url":{"url":""},"type":"image_url"}`
-				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				imagesResult := gjson.Get(template, "choices.0.delta.images")
 				if !imagesResult.Exists() || !imagesResult.IsArray() {
 					template, _ = sjson.SetRaw(template, "choices.0.delta.images", `[]`)
 				}
+				imageIndex := len(gjson.Get(template, "choices.0.delta.images").Array())
+				imagePayload := `{"type":"image_url","image_url":{"url":""}}`
+				imagePayload, _ = sjson.Set(imagePayload, "index", imageIndex)
+				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				template, _ = sjson.Set(template, "choices.0.delta.role", "assistant")
 				template, _ = sjson.SetRaw(template, "choices.0.delta.images.-1", imagePayload)
 			}

internal/translator/gemini/claude/gemini_claude_request.go

@@ -55,6 +55,8 @@ func ConvertClaudeRequestToGemini(modelName string, inputRawJSON []byte, _ bool)
 		if hasSystemParts {
 			out, _ = sjson.SetRaw(out, "system_instruction", systemInstruction)
 		}
+	} else if systemResult.Type == gjson.String {
+		out, _ = sjson.Set(out, "request.system_instruction.parts.-1.text", systemResult.String())
 	}
 
 	// contents

internal/translator/gemini/openai/chat-completions/gemini_openai_request.go

@@ -233,18 +233,15 @@ func ConvertOpenAIRequestToGemini(modelName string, inputRawJSON []byte, _ bool)
 			} else if role == "assistant" {
 				node := []byte(`{"role":"model","parts":[]}`)
 				p := 0
-
 				if content.Type == gjson.String {
 					// Assistant text -> single model content
 					node, _ = sjson.SetBytes(node, "parts.-1.text", content.String())
-					out, _ = sjson.SetRawBytes(out, "contents.-1", node)
 					p++
 				} else if content.IsArray() {
 					// Assistant multimodal content (e.g. text + image) -> single model content with parts
 					for _, item := range content.Array() {
 						switch item.Get("type").String() {
 						case "text":
-							node, _ = sjson.SetBytes(node, "parts."+itoa(p)+".text", item.Get("text").String())
 							p++
 						case "image_url":
 							// If the assistant returned an inline data URL, preserve it for history fidelity.
@@ -261,7 +258,6 @@ func ConvertOpenAIRequestToGemini(modelName string, inputRawJSON []byte, _ bool)
 							}
 						}
 					}
-					out, _ = sjson.SetRawBytes(out, "contents.-1", node)
 				}
 
 				// Tool calls -> single model content with functionCall parts
@@ -286,7 +282,7 @@ func ConvertOpenAIRequestToGemini(modelName string, inputRawJSON []byte, _ bool)
 					out, _ = sjson.SetRawBytes(out, "contents.-1", node)
 
 					// Append a single tool content combining name + response per function
-					toolNode := []byte(`{"role":"tool","parts":[]}`)
+					toolNode := []byte(`{"role":"user","parts":[]}`)
 					pp := 0
 					for _, fid := range fIDs {
 						if name, ok := tcID2Name[fid]; ok {
@@ -302,6 +298,8 @@ func ConvertOpenAIRequestToGemini(modelName string, inputRawJSON []byte, _ bool)
 					if pp > 0 {
 						out, _ = sjson.SetRawBytes(out, "contents.-1", toolNode)
 					}
+				} else {
+					out, _ = sjson.SetRawBytes(out, "contents.-1", node)
 				}
 			}
 		}

internal/translator/gemini/openai/chat-completions/gemini_openai_response.go

@@ -13,6 +13,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -88,18 +89,27 @@ func ConvertGeminiResponseToOpenAI(_ context.Context, _ string, originalRequestR
 
 	// Extract and set usage metadata (token counts).
 	if usageResult := gjson.GetBytes(rawJSON, "usageMetadata"); usageResult.Exists() {
+		cachedTokenCount := usageResult.Get("cachedContentTokenCount").Int()
 		if candidatesTokenCountResult := usageResult.Get("candidatesTokenCount"); candidatesTokenCountResult.Exists() {
 			template, _ = sjson.Set(template, "usage.completion_tokens", candidatesTokenCountResult.Int())
 		}
 		if totalTokenCountResult := usageResult.Get("totalTokenCount"); totalTokenCountResult.Exists() {
 			template, _ = sjson.Set(template, "usage.total_tokens", totalTokenCountResult.Int())
 		}
-		promptTokenCount := usageResult.Get("promptTokenCount").Int()
+		promptTokenCount := usageResult.Get("promptTokenCount").Int() - cachedTokenCount
 		thoughtsTokenCount := usageResult.Get("thoughtsTokenCount").Int()
 		template, _ = sjson.Set(template, "usage.prompt_tokens", promptTokenCount+thoughtsTokenCount)
 		if thoughtsTokenCount > 0 {
 			template, _ = sjson.Set(template, "usage.completion_tokens_details.reasoning_tokens", thoughtsTokenCount)
 		}
+		// Include cached token count if present (indicates prompt caching is working)
+		if cachedTokenCount > 0 {
+			var err error
+			template, err = sjson.Set(template, "usage.prompt_tokens_details.cached_tokens", cachedTokenCount)
+			if err != nil {
+				log.Warnf("gemini openai response: failed to set cached_tokens in streaming: %v", err)
+			}
+		}
 	}
 
 	// Process the main content part of the response.
@@ -172,12 +182,14 @@ func ConvertGeminiResponseToOpenAI(_ context.Context, _ string, originalRequestR
 					mimeType = "image/png"
 				}
 				imageURL := fmt.Sprintf("data:%s;base64,%s", mimeType, data)
-				imagePayload := `{"image_url":{"url":""},"type":"image_url"}`
-				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				imagesResult := gjson.Get(template, "choices.0.delta.images")
 				if !imagesResult.Exists() || !imagesResult.IsArray() {
 					template, _ = sjson.SetRaw(template, "choices.0.delta.images", `[]`)
 				}
+				imageIndex := len(gjson.Get(template, "choices.0.delta.images").Array())
+				imagePayload := `{"type":"image_url","image_url":{"url":""}}`
+				imagePayload, _ = sjson.Set(imagePayload, "index", imageIndex)
+				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				template, _ = sjson.Set(template, "choices.0.delta.role", "assistant")
 				template, _ = sjson.SetRaw(template, "choices.0.delta.images.-1", imagePayload)
 			}
@@ -240,10 +252,19 @@ func ConvertGeminiResponseToOpenAINonStream(_ context.Context, _ string, origina
 		}
 		promptTokenCount := usageResult.Get("promptTokenCount").Int()
 		thoughtsTokenCount := usageResult.Get("thoughtsTokenCount").Int()
+		cachedTokenCount := usageResult.Get("cachedContentTokenCount").Int()
 		template, _ = sjson.Set(template, "usage.prompt_tokens", promptTokenCount+thoughtsTokenCount)
 		if thoughtsTokenCount > 0 {
 			template, _ = sjson.Set(template, "usage.completion_tokens_details.reasoning_tokens", thoughtsTokenCount)
 		}
+		// Include cached token count if present (indicates prompt caching is working)
+		if cachedTokenCount > 0 {
+			var err error
+			template, err = sjson.Set(template, "usage.prompt_tokens_details.cached_tokens", cachedTokenCount)
+			if err != nil {
+				log.Warnf("gemini openai response: failed to set cached_tokens in non-streaming: %v", err)
+			}
+		}
 	}
 
 	// Process the main content part of the response.
@@ -297,12 +318,14 @@ func ConvertGeminiResponseToOpenAINonStream(_ context.Context, _ string, origina
 					mimeType = "image/png"
 				}
 				imageURL := fmt.Sprintf("data:%s;base64,%s", mimeType, data)
-				imagePayload := `{"image_url":{"url":""},"type":"image_url"}`
-				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				imagesResult := gjson.Get(template, "choices.0.message.images")
 				if !imagesResult.Exists() || !imagesResult.IsArray() {
 					template, _ = sjson.SetRaw(template, "choices.0.message.images", `[]`)
 				}
+				imageIndex := len(gjson.Get(template, "choices.0.message.images").Array())
+				imagePayload := `{"type":"image_url","image_url":{"url":""}}`
+				imagePayload, _ = sjson.Set(imagePayload, "index", imageIndex)
+				imagePayload, _ = sjson.Set(imagePayload, "image_url.url", imageURL)
 				template, _ = sjson.Set(template, "choices.0.message.role", "assistant")
 				template, _ = sjson.SetRaw(template, "choices.0.message.images.-1", imagePayload)
 			}

internal/translator/kiro/common/message_merge.go

@@ -10,6 +10,7 @@ import (
 // MergeAdjacentMessages merges adjacent messages with the same role.
 // This reduces API call complexity and improves compatibility.
 // Based on AIClient-2-API implementation.
+// NOTE: Tool messages are NOT merged because each has a unique tool_call_id that must be preserved.
 func MergeAdjacentMessages(messages []gjson.Result) []gjson.Result {
 	if len(messages) <= 1 {
 		return messages
@@ -26,6 +27,12 @@ func MergeAdjacentMessages(messages []gjson.Result) []gjson.Result {
 		currentRole := msg.Get("role").String()
 		lastRole := lastMsg.Get("role").String()
 
+		// Don't merge tool messages - each has a unique tool_call_id
+		if currentRole == "tool" || lastRole == "tool" {
+			merged = append(merged, msg)
+			continue
+		}
+
 		if currentRole == lastRole {
 			// Merge content from current message into last message
 			mergedContent := mergeMessageContent(lastMsg, msg)

internal/translator/kiro/openai/kiro_openai_request.go

@@ -450,24 +450,10 @@ func processOpenAIMessages(messages gjson.Result, modelID, origin string) ([]Kir
 	// Merge adjacent messages with the same role
 	messagesArray := kirocommon.MergeAdjacentMessages(messages.Array())
 
-	// Build tool_call_id to name mapping from assistant messages
-	toolCallIDToName := make(map[string]string)
-	for _, msg := range messagesArray {
-		if msg.Get("role").String() == "assistant" {
-			toolCalls := msg.Get("tool_calls")
-			if toolCalls.IsArray() {
-				for _, tc := range toolCalls.Array() {
-					if tc.Get("type").String() == "function" {
-						id := tc.Get("id").String()
-						name := tc.Get("function.name").String()
-						if id != "" && name != "" {
-							toolCallIDToName[id] = name
-						}
-					}
-				}
-			}
-		}
-	}
+	// Track pending tool results that should be attached to the next user message
+	// This is critical for LiteLLM-translated requests where tool results appear
+	// as separate "tool" role messages between assistant and user messages
+	var pendingToolResults []KiroToolResult
 
 	for i, msg := range messagesArray {
 		role := msg.Get("role").String()
@@ -480,6 +466,10 @@ func processOpenAIMessages(messages gjson.Result, modelID, origin string) ([]Kir
 
 		case "user":
 			userMsg, toolResults := buildUserMessageFromOpenAI(msg, modelID, origin)
+			// Merge any pending tool results from preceding "tool" role messages
+			toolResults = append(pendingToolResults, toolResults...)
+			pendingToolResults = nil // Reset pending tool results
+
 			if isLastMessage {
 				currentUserMsg = &userMsg
 				currentToolResults = toolResults
@@ -505,6 +495,24 @@ func processOpenAIMessages(messages gjson.Result, modelID, origin string) ([]Kir
 
 		case "assistant":
 			assistantMsg := buildAssistantMessageFromOpenAI(msg)
+
+			// If there are pending tool results, we need to insert a synthetic user message
+			// before this assistant message to maintain proper conversation structure
+			if len(pendingToolResults) > 0 {
+				syntheticUserMsg := KiroUserInputMessage{
+					Content: "Tool results provided.",
+					ModelID: modelID,
+					Origin:  origin,
+					UserInputMessageContext: &KiroUserInputMessageContext{
+						ToolResults: pendingToolResults,
+					},
+				}
+				history = append(history, KiroHistoryMessage{
+					UserInputMessage: &syntheticUserMsg,
+				})
+				pendingToolResults = nil
+			}
+
 			if isLastMessage {
 				history = append(history, KiroHistoryMessage{
 					AssistantResponseMessage: &assistantMsg,
@@ -524,7 +532,7 @@ func processOpenAIMessages(messages gjson.Result, modelID, origin string) ([]Kir
 		case "tool":
 			// Tool messages in OpenAI format provide results for tool_calls
 			// These are typically followed by user or assistant messages
-			// Process them and merge into the next user message's tool results
+			// Collect them as pending and attach to the next user message
 			toolCallID := msg.Get("tool_call_id").String()
 			content := msg.Get("content").String()
 
@@ -534,9 +542,21 @@ func processOpenAIMessages(messages gjson.Result, modelID, origin string) ([]Kir
 					Content:   []KiroTextContent{{Text: content}},
 					Status:    "success",
 				}
-				// Tool results should be included in the next user message
-				// For now, collect them and they'll be handled when we build the current message
-				currentToolResults = append(currentToolResults, toolResult)
+				// Collect pending tool results to attach to the next user message
+				pendingToolResults = append(pendingToolResults, toolResult)
+			}
+		}
+	}
+
+	// Handle case where tool results are at the end with no following user message
+	if len(pendingToolResults) > 0 {
+		currentToolResults = append(currentToolResults, pendingToolResults...)
+		// If there's no current user message, create a synthetic one for the tool results
+		if currentUserMsg == nil {
+			currentUserMsg = &KiroUserInputMessage{
+				Content: "Tool results provided.",
+				ModelID: modelID,
+				Origin:  origin,
 			}
 		}
 	}
@@ -551,9 +571,6 @@ func buildUserMessageFromOpenAI(msg gjson.Result, modelID, origin string) (KiroU
 	var toolResults []KiroToolResult
 	var images []KiroImage
 
-	// Track seen toolCallIds to deduplicate
-	seenToolCallIDs := make(map[string]bool)
-
 	if content.IsArray() {
 		for _, part := range content.Array() {
 			partType := part.Get("type").String()
@@ -589,9 +606,6 @@ func buildUserMessageFromOpenAI(msg gjson.Result, modelID, origin string) (KiroU
 		contentBuilder.WriteString(content.String())
 	}
 
-	// Check for tool_calls in the message (shouldn't be in user messages, but handle edge cases)
-	_ = seenToolCallIDs // Used for deduplication if needed
-
 	userMsg := KiroUserInputMessage{
 		Content: contentBuilder.String(),
 		ModelID: modelID,

internal/translator/kiro/openai/kiro_openai_request_test.go

@@ -0,0 +1,386 @@
+package openai
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+// TestToolResultsAttachedToCurrentMessage verifies that tool results from "tool" role messages
+// are properly attached to the current user message (the last message in the conversation).
+// This is critical for LiteLLM-translated requests where tool results appear as separate messages.
+func TestToolResultsAttachedToCurrentMessage(t *testing.T) {
+	// OpenAI format request simulating LiteLLM's translation from Anthropic format
+	// Sequence: user -> assistant (with tool_calls) -> tool (result) -> user
+	// The last user message should have the tool results attached
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Hello, can you read a file for me?"},
+			{
+				"role": "assistant",
+				"content": "I'll read that file for you.",
+				"tool_calls": [
+					{
+						"id": "call_abc123",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/test.txt\"}"
+						}
+					}
+				]
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_abc123",
+				"content": "File contents: Hello World!"
+			},
+			{"role": "user", "content": "What did the file say?"}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	// The last user message becomes currentMessage
+	// History should have: user (first), assistant (with tool_calls)
+	t.Logf("History count: %d", len(payload.ConversationState.History))
+	if len(payload.ConversationState.History) != 2 {
+		t.Errorf("Expected 2 history entries (user + assistant), got %d", len(payload.ConversationState.History))
+	}
+
+	// Tool results should be attached to currentMessage (the last user message)
+	ctx := payload.ConversationState.CurrentMessage.UserInputMessage.UserInputMessageContext
+	if ctx == nil {
+		t.Fatal("Expected currentMessage to have UserInputMessageContext with tool results")
+	}
+
+	if len(ctx.ToolResults) != 1 {
+		t.Fatalf("Expected 1 tool result in currentMessage, got %d", len(ctx.ToolResults))
+	}
+
+	tr := ctx.ToolResults[0]
+	if tr.ToolUseID != "call_abc123" {
+		t.Errorf("Expected toolUseId 'call_abc123', got '%s'", tr.ToolUseID)
+	}
+	if len(tr.Content) == 0 || tr.Content[0].Text != "File contents: Hello World!" {
+		t.Errorf("Tool result content mismatch, got: %+v", tr.Content)
+	}
+}
+
+// TestToolResultsInHistoryUserMessage verifies that when there are multiple user messages
+// after tool results, the tool results are attached to the correct user message in history.
+func TestToolResultsInHistoryUserMessage(t *testing.T) {
+	// Sequence: user -> assistant (with tool_calls) -> tool (result) -> user -> assistant -> user
+	// The first user after tool should have tool results in history
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Hello"},
+			{
+				"role": "assistant",
+				"content": "I'll read the file.",
+				"tool_calls": [
+					{
+						"id": "call_1",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{}"
+						}
+					}
+				]
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_1",
+				"content": "File result"
+			},
+			{"role": "user", "content": "Thanks for the file"},
+			{"role": "assistant", "content": "You're welcome"},
+			{"role": "user", "content": "Bye"}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	// History should have: user, assistant, user (with tool results), assistant
+	// CurrentMessage should be: last user "Bye"
+	t.Logf("History count: %d", len(payload.ConversationState.History))
+
+	// Find the user message in history with tool results
+	foundToolResults := false
+	for i, h := range payload.ConversationState.History {
+		if h.UserInputMessage != nil {
+			t.Logf("History[%d]: user message content=%q", i, h.UserInputMessage.Content)
+			if h.UserInputMessage.UserInputMessageContext != nil {
+				if len(h.UserInputMessage.UserInputMessageContext.ToolResults) > 0 {
+					foundToolResults = true
+					t.Logf("  Found %d tool results", len(h.UserInputMessage.UserInputMessageContext.ToolResults))
+					tr := h.UserInputMessage.UserInputMessageContext.ToolResults[0]
+					if tr.ToolUseID != "call_1" {
+						t.Errorf("Expected toolUseId 'call_1', got '%s'", tr.ToolUseID)
+					}
+				}
+			}
+		}
+		if h.AssistantResponseMessage != nil {
+			t.Logf("History[%d]: assistant message content=%q", i, h.AssistantResponseMessage.Content)
+		}
+	}
+
+	if !foundToolResults {
+		t.Error("Tool results were not attached to any user message in history")
+	}
+}
+
+// TestToolResultsWithMultipleToolCalls verifies handling of multiple tool calls
+func TestToolResultsWithMultipleToolCalls(t *testing.T) {
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Read two files for me"},
+			{
+				"role": "assistant",
+				"content": "I'll read both files.",
+				"tool_calls": [
+					{
+						"id": "call_1",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/file1.txt\"}"
+						}
+					},
+					{
+						"id": "call_2",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/file2.txt\"}"
+						}
+					}
+				]
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_1",
+				"content": "Content of file 1"
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_2",
+				"content": "Content of file 2"
+			},
+			{"role": "user", "content": "What do they say?"}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	t.Logf("History count: %d", len(payload.ConversationState.History))
+	t.Logf("CurrentMessage content: %q", payload.ConversationState.CurrentMessage.UserInputMessage.Content)
+
+	// Check if there are any tool results anywhere
+	var totalToolResults int
+	for i, h := range payload.ConversationState.History {
+		if h.UserInputMessage != nil && h.UserInputMessage.UserInputMessageContext != nil {
+			count := len(h.UserInputMessage.UserInputMessageContext.ToolResults)
+			t.Logf("History[%d] user message has %d tool results", i, count)
+			totalToolResults += count
+		}
+	}
+
+	ctx := payload.ConversationState.CurrentMessage.UserInputMessage.UserInputMessageContext
+	if ctx != nil {
+		t.Logf("CurrentMessage has %d tool results", len(ctx.ToolResults))
+		totalToolResults += len(ctx.ToolResults)
+	} else {
+		t.Logf("CurrentMessage has no UserInputMessageContext")
+	}
+
+	if totalToolResults != 2 {
+		t.Errorf("Expected 2 tool results total, got %d", totalToolResults)
+	}
+}
+
+// TestToolResultsAtEndOfConversation verifies tool results are handled when
+// the conversation ends with tool results (no following user message)
+func TestToolResultsAtEndOfConversation(t *testing.T) {
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Read a file"},
+			{
+				"role": "assistant",
+				"content": "Reading the file.",
+				"tool_calls": [
+					{
+						"id": "call_end",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/test.txt\"}"
+						}
+					}
+				]
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_end",
+				"content": "File contents here"
+			}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	// When the last message is a tool result, a synthetic user message is created
+	// and tool results should be attached to it
+	ctx := payload.ConversationState.CurrentMessage.UserInputMessage.UserInputMessageContext
+	if ctx == nil || len(ctx.ToolResults) == 0 {
+		t.Error("Expected tool results to be attached to current message when conversation ends with tool result")
+	} else {
+		if ctx.ToolResults[0].ToolUseID != "call_end" {
+			t.Errorf("Expected toolUseId 'call_end', got '%s'", ctx.ToolResults[0].ToolUseID)
+		}
+	}
+}
+
+// TestToolResultsFollowedByAssistant verifies handling when tool results are followed
+// by an assistant message (no intermediate user message).
+// This is the pattern from LiteLLM translation of Anthropic format where:
+// user message has ONLY tool_result blocks -> LiteLLM creates tool messages
+// then the next message is assistant
+func TestToolResultsFollowedByAssistant(t *testing.T) {
+	// Sequence: user -> assistant (with tool_calls) -> tool -> tool -> assistant -> user
+	// This simulates LiteLLM's translation of:
+	//   user: "Read files"
+	//   assistant: [tool_use, tool_use]
+	//   user: [tool_result, tool_result]  <- becomes multiple "tool" role messages
+	//   assistant: "I've read them"
+	//   user: "What did they say?"
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Read two files for me"},
+			{
+				"role": "assistant",
+				"content": "I'll read both files.",
+				"tool_calls": [
+					{
+						"id": "call_1",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/a.txt\"}"
+						}
+					},
+					{
+						"id": "call_2",
+						"type": "function",
+						"function": {
+							"name": "Read",
+							"arguments": "{\"file_path\": \"/tmp/b.txt\"}"
+						}
+					}
+				]
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_1",
+				"content": "Contents of file A"
+			},
+			{
+				"role": "tool",
+				"tool_call_id": "call_2",
+				"content": "Contents of file B"
+			},
+			{
+				"role": "assistant",
+				"content": "I've read both files."
+			},
+			{"role": "user", "content": "What did they say?"}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	t.Logf("History count: %d", len(payload.ConversationState.History))
+
+	// Tool results should be attached to a synthetic user message or the history should be valid
+	var totalToolResults int
+	for i, h := range payload.ConversationState.History {
+		if h.UserInputMessage != nil {
+			t.Logf("History[%d]: user message content=%q", i, h.UserInputMessage.Content)
+			if h.UserInputMessage.UserInputMessageContext != nil {
+				count := len(h.UserInputMessage.UserInputMessageContext.ToolResults)
+				t.Logf("  Has %d tool results", count)
+				totalToolResults += count
+			}
+		}
+		if h.AssistantResponseMessage != nil {
+			t.Logf("History[%d]: assistant message content=%q", i, h.AssistantResponseMessage.Content)
+		}
+	}
+
+	ctx := payload.ConversationState.CurrentMessage.UserInputMessage.UserInputMessageContext
+	if ctx != nil {
+		t.Logf("CurrentMessage has %d tool results", len(ctx.ToolResults))
+		totalToolResults += len(ctx.ToolResults)
+	}
+
+	if totalToolResults != 2 {
+		t.Errorf("Expected 2 tool results total, got %d", totalToolResults)
+	}
+}
+
+// TestAssistantEndsConversation verifies handling when assistant is the last message
+func TestAssistantEndsConversation(t *testing.T) {
+	input := []byte(`{
+		"model": "kiro-claude-opus-4-5-agentic",
+		"messages": [
+			{"role": "user", "content": "Hello"},
+			{
+				"role": "assistant",
+				"content": "Hi there!"
+			}
+		]
+	}`)
+
+	result, _ := BuildKiroPayloadFromOpenAI(input, "kiro-model", "", "CLI", false, false, nil, nil)
+
+	var payload KiroPayload
+	if err := json.Unmarshal(result, &payload); err != nil {
+		t.Fatalf("Failed to unmarshal result: %v", err)
+	}
+
+	// When assistant is last, a "Continue" user message should be created
+	if payload.ConversationState.CurrentMessage.UserInputMessage.Content == "" {
+		t.Error("Expected a 'Continue' message to be created when assistant is last")
+	}
+}

internal/usage/logger_plugin.go

@@ -6,6 +6,7 @@ package usage
 import (
 	"context"
 	"fmt"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -90,7 +91,7 @@ type modelStats struct {
 type RequestDetail struct {
 	Timestamp time.Time  `json:"timestamp"`
 	Source    string     `json:"source"`
-	AuthIndex uint64     `json:"auth_index"`
+	AuthIndex string     `json:"auth_index"`
 	Tokens    TokenStats `json:"tokens"`
 	Failed    bool       `json:"failed"`
 }
@@ -281,6 +282,118 @@ func (s *RequestStatistics) Snapshot() StatisticsSnapshot {
 	return result
 }
 
+type MergeResult struct {
+	Added   int64 `json:"added"`
+	Skipped int64 `json:"skipped"`
+}
+
+// MergeSnapshot merges an exported statistics snapshot into the current store.
+// Existing data is preserved and duplicate request details are skipped.
+func (s *RequestStatistics) MergeSnapshot(snapshot StatisticsSnapshot) MergeResult {
+	result := MergeResult{}
+	if s == nil {
+		return result
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	seen := make(map[string]struct{})
+	for apiName, stats := range s.apis {
+		if stats == nil {
+			continue
+		}
+		for modelName, modelStatsValue := range stats.Models {
+			if modelStatsValue == nil {
+				continue
+			}
+			for _, detail := range modelStatsValue.Details {
+				seen[dedupKey(apiName, modelName, detail)] = struct{}{}
+			}
+		}
+	}
+
+	for apiName, apiSnapshot := range snapshot.APIs {
+		apiName = strings.TrimSpace(apiName)
+		if apiName == "" {
+			continue
+		}
+		stats, ok := s.apis[apiName]
+		if !ok || stats == nil {
+			stats = &apiStats{Models: make(map[string]*modelStats)}
+			s.apis[apiName] = stats
+		} else if stats.Models == nil {
+			stats.Models = make(map[string]*modelStats)
+		}
+		for modelName, modelSnapshot := range apiSnapshot.Models {
+			modelName = strings.TrimSpace(modelName)
+			if modelName == "" {
+				modelName = "unknown"
+			}
+			for _, detail := range modelSnapshot.Details {
+				detail.Tokens = normaliseTokenStats(detail.Tokens)
+				if detail.Timestamp.IsZero() {
+					detail.Timestamp = time.Now()
+				}
+				key := dedupKey(apiName, modelName, detail)
+				if _, exists := seen[key]; exists {
+					result.Skipped++
+					continue
+				}
+				seen[key] = struct{}{}
+				s.recordImported(apiName, modelName, stats, detail)
+				result.Added++
+			}
+		}
+	}
+
+	return result
+}
+
+func (s *RequestStatistics) recordImported(apiName, modelName string, stats *apiStats, detail RequestDetail) {
+	totalTokens := detail.Tokens.TotalTokens
+	if totalTokens < 0 {
+		totalTokens = 0
+	}
+
+	s.totalRequests++
+	if detail.Failed {
+		s.failureCount++
+	} else {
+		s.successCount++
+	}
+	s.totalTokens += totalTokens
+
+	s.updateAPIStats(stats, modelName, detail)
+
+	dayKey := detail.Timestamp.Format("2006-01-02")
+	hourKey := detail.Timestamp.Hour()
+
+	s.requestsByDay[dayKey]++
+	s.requestsByHour[hourKey]++
+	s.tokensByDay[dayKey] += totalTokens
+	s.tokensByHour[hourKey] += totalTokens
+}
+
+func dedupKey(apiName, modelName string, detail RequestDetail) string {
+	timestamp := detail.Timestamp.UTC().Format(time.RFC3339Nano)
+	tokens := normaliseTokenStats(detail.Tokens)
+	return fmt.Sprintf(
+		"%s|%s|%s|%s|%s|%t|%d|%d|%d|%d|%d",
+		apiName,
+		modelName,
+		timestamp,
+		detail.Source,
+		detail.AuthIndex,
+		detail.Failed,
+		tokens.InputTokens,
+		tokens.OutputTokens,
+		tokens.ReasoningTokens,
+		tokens.CachedTokens,
+		tokens.TotalTokens,
+	)
+}
+
 func resolveAPIIdentifier(ctx context.Context, record coreusage.Record) string {
 	if ctx != nil {
 		if ginCtx, ok := ctx.Value("gin").(*gin.Context); ok && ginCtx != nil {
@@ -340,6 +453,16 @@ func normaliseDetail(detail coreusage.Detail) TokenStats {
 	return tokens
 }
 
+func normaliseTokenStats(tokens TokenStats) TokenStats {
+	if tokens.TotalTokens == 0 {
+		tokens.TotalTokens = tokens.InputTokens + tokens.OutputTokens + tokens.ReasoningTokens
+	}
+	if tokens.TotalTokens == 0 {
+		tokens.TotalTokens = tokens.InputTokens + tokens.OutputTokens + tokens.ReasoningTokens + tokens.CachedTokens
+	}
+	return tokens
+}
+
 func formatHour(hour int) string {
 	if hour < 0 {
 		hour = 0

sdk/api/handlers/claude/code_handlers.go

@@ -14,7 +14,6 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"time"
 
 	"github.com/gin-gonic/gin"
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/constant"
@@ -185,14 +184,6 @@ func (h *ClaudeCodeAPIHandler) handleNonStreamingResponse(c *gin.Context, rawJSO
 //   - c: The Gin context for the request.
 //   - rawJSON: The raw JSON request body.
 func (h *ClaudeCodeAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON []byte) {
-	// Set up Server-Sent Events (SSE) headers for streaming response
-	// These headers are essential for maintaining a persistent connection
-	// and enabling real-time streaming of chat completions
-	c.Header("Content-Type", "text/event-stream")
-	c.Header("Cache-Control", "no-cache")
-	c.Header("Connection", "keep-alive")
-	c.Header("Access-Control-Allow-Origin", "*")
-
 	// Get the http.Flusher interface to manually flush the response.
 	// This is crucial for streaming as it allows immediate sending of data chunks
 	flusher, ok := c.Writer.(http.Flusher)
@@ -213,58 +204,82 @@ func (h *ClaudeCodeAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON [
 	cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
 
 	dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, "")
-	h.forwardClaudeStream(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
-	return
-}
+	setSSEHeaders := func() {
+		c.Header("Content-Type", "text/event-stream")
+		c.Header("Cache-Control", "no-cache")
+		c.Header("Connection", "keep-alive")
+		c.Header("Access-Control-Allow-Origin", "*")
+	}
 
-func (h *ClaudeCodeAPIHandler) forwardClaudeStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
-	// OpenAI-style stream forwarding: write each SSE chunk and flush immediately.
-	// This guarantees clients see incremental output even for small responses.
+	// Peek at the first chunk to determine success or failure before setting headers
 	for {
 		select {
 		case <-c.Request.Context().Done():
-			cancel(c.Request.Context().Err())
+			cliCancel(c.Request.Context().Err())
 			return
-
-		case chunk, ok := <-data:
+		case errMsg, ok := <-errChan:
 			if !ok {
+				// Err channel closed cleanly; wait for data channel.
+				errChan = nil
+				continue
+			}
+			// Upstream failed immediately. Return proper error status and JSON.
+			h.WriteErrorResponse(c, errMsg)
+			if errMsg != nil {
+				cliCancel(errMsg.Error)
+			} else {
+				cliCancel(nil)
+			}
+			return
+		case chunk, ok := <-dataChan:
+			if !ok {
+				// Stream closed without data? Send DONE or just headers.
+				setSSEHeaders()
 				flusher.Flush()
-				cancel(nil)
+				cliCancel(nil)
 				return
 			}
+
+			// Success! Set headers now.
+			setSSEHeaders()
+
+			// Write the first chunk
 			if len(chunk) > 0 {
 				_, _ = c.Writer.Write(chunk)
 				flusher.Flush()
 			}
 
-		case errMsg, ok := <-errs:
-			if !ok {
-				continue
-			}
-			if errMsg != nil {
-				status := http.StatusInternalServerError
-				if errMsg.StatusCode > 0 {
-					status = errMsg.StatusCode
-				}
-				c.Status(status)
-
-				// An error occurred: emit as a proper SSE error event
-				errorBytes, _ := json.Marshal(h.toClaudeError(errMsg))
-				_, _ = fmt.Fprintf(c.Writer, "event: error\ndata: %s\n\n", errorBytes)
-				flusher.Flush()
-			}
-
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
-			}
-			cancel(execErr)
+			// Continue streaming the rest
+			h.forwardClaudeStream(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
 			return
-		case <-time.After(500 * time.Millisecond):
 		}
 	}
 }
 
+func (h *ClaudeCodeAPIHandler) forwardClaudeStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
+	h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
+		WriteChunk: func(chunk []byte) {
+			if len(chunk) == 0 {
+				return
+			}
+			_, _ = c.Writer.Write(chunk)
+		},
+		WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
+			if errMsg == nil {
+				return
+			}
+			status := http.StatusInternalServerError
+			if errMsg.StatusCode > 0 {
+				status = errMsg.StatusCode
+			}
+			c.Status(status)
+
+			errorBytes, _ := json.Marshal(h.toClaudeError(errMsg))
+			_, _ = fmt.Fprintf(c.Writer, "event: error\ndata: %s\n\n", errorBytes)
+		},
+	})
+}
+
 type claudeErrorDetail struct {
 	Type    string `json:"type"`
 	Message string `json:"message"`

sdk/api/handlers/gemini/gemini-cli_handlers.go

@@ -182,19 +182,18 @@ func (h *GeminiCLIAPIHandler) handleInternalGenerateContent(c *gin.Context, rawJ
 }
 
 func (h *GeminiCLIAPIHandler) forwardCLIStream(c *gin.Context, flusher http.Flusher, alt string, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
-	for {
-		select {
-		case <-c.Request.Context().Done():
-			cancel(c.Request.Context().Err())
-			return
-		case chunk, ok := <-data:
-			if !ok {
-				cancel(nil)
-				return
-			}
+	var keepAliveInterval *time.Duration
+	if alt != "" {
+		disabled := time.Duration(0)
+		keepAliveInterval = &disabled
+	}
+
+	h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
+		KeepAliveInterval: keepAliveInterval,
+		WriteChunk: func(chunk []byte) {
 			if alt == "" {
 				if bytes.Equal(chunk, []byte("data: [DONE]")) || bytes.Equal(chunk, []byte("[DONE]")) {
-					continue
+					return
 				}
 
 				if !bytes.HasPrefix(chunk, []byte("data:")) {
@@ -206,22 +205,25 @@ func (h *GeminiCLIAPIHandler) forwardCLIStream(c *gin.Context, flusher http.Flus
 			} else {
 				_, _ = c.Writer.Write(chunk)
 			}
-			flusher.Flush()
-		case errMsg, ok := <-errs:
-			if !ok {
-				continue
+		},
+		WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
+			if errMsg == nil {
+				return
 			}
-			if errMsg != nil {
-				h.WriteErrorResponse(c, errMsg)
-				flusher.Flush()
+			status := http.StatusInternalServerError
+			if errMsg.StatusCode > 0 {
+				status = errMsg.StatusCode
 			}
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
+			errText := http.StatusText(status)
+			if errMsg.Error != nil && errMsg.Error.Error() != "" {
+				errText = errMsg.Error.Error()
 			}
-			cancel(execErr)
-			return
-		case <-time.After(500 * time.Millisecond):
-		}
-	}
+			body := handlers.BuildErrorResponseBody(status, errText)
+			if alt == "" {
+				_, _ = fmt.Fprintf(c.Writer, "event: error\ndata: %s\n\n", string(body))
+			} else {
+				_, _ = c.Writer.Write(body)
+			}
+		},
+	})
 }

sdk/api/handlers/gemini/gemini_handlers.go

@@ -226,13 +226,6 @@ func (h *GeminiAPIHandler) GeminiHandler(c *gin.Context) {
 func (h *GeminiAPIHandler) handleStreamGenerateContent(c *gin.Context, modelName string, rawJSON []byte) {
 	alt := h.GetAlt(c)
 
-	if alt == "" {
-		c.Header("Content-Type", "text/event-stream")
-		c.Header("Cache-Control", "no-cache")
-		c.Header("Connection", "keep-alive")
-		c.Header("Access-Control-Allow-Origin", "*")
-	}
-
 	// Get the http.Flusher interface to manually flush the response.
 	flusher, ok := c.Writer.(http.Flusher)
 	if !ok {
@@ -247,8 +240,65 @@ func (h *GeminiAPIHandler) handleStreamGenerateContent(c *gin.Context, modelName
 
 	cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
 	dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, alt)
-	h.forwardGeminiStream(c, flusher, alt, func(err error) { cliCancel(err) }, dataChan, errChan)
-	return
+
+	setSSEHeaders := func() {
+		c.Header("Content-Type", "text/event-stream")
+		c.Header("Cache-Control", "no-cache")
+		c.Header("Connection", "keep-alive")
+		c.Header("Access-Control-Allow-Origin", "*")
+	}
+
+	// Peek at the first chunk
+	for {
+		select {
+		case <-c.Request.Context().Done():
+			cliCancel(c.Request.Context().Err())
+			return
+		case errMsg, ok := <-errChan:
+			if !ok {
+				// Err channel closed cleanly; wait for data channel.
+				errChan = nil
+				continue
+			}
+			// Upstream failed immediately. Return proper error status and JSON.
+			h.WriteErrorResponse(c, errMsg)
+			if errMsg != nil {
+				cliCancel(errMsg.Error)
+			} else {
+				cliCancel(nil)
+			}
+			return
+		case chunk, ok := <-dataChan:
+			if !ok {
+				// Closed without data
+				if alt == "" {
+					setSSEHeaders()
+				}
+				flusher.Flush()
+				cliCancel(nil)
+				return
+			}
+
+			// Success! Set headers.
+			if alt == "" {
+				setSSEHeaders()
+			}
+
+			// Write first chunk
+			if alt == "" {
+				_, _ = c.Writer.Write([]byte("data: "))
+				_, _ = c.Writer.Write(chunk)
+				_, _ = c.Writer.Write([]byte("\n\n"))
+			} else {
+				_, _ = c.Writer.Write(chunk)
+			}
+			flusher.Flush()
+
+			// Continue
+			h.forwardGeminiStream(c, flusher, alt, func(err error) { cliCancel(err) }, dataChan, errChan)
+			return
+		}
+	}
 }
 
 // handleCountTokens handles token counting requests for Gemini models.
@@ -297,16 +347,15 @@ func (h *GeminiAPIHandler) handleGenerateContent(c *gin.Context, modelName strin
 }
 
 func (h *GeminiAPIHandler) forwardGeminiStream(c *gin.Context, flusher http.Flusher, alt string, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
-	for {
-		select {
-		case <-c.Request.Context().Done():
-			cancel(c.Request.Context().Err())
-			return
-		case chunk, ok := <-data:
-			if !ok {
-				cancel(nil)
-				return
-			}
+	var keepAliveInterval *time.Duration
+	if alt != "" {
+		disabled := time.Duration(0)
+		keepAliveInterval = &disabled
+	}
+
+	h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
+		KeepAliveInterval: keepAliveInterval,
+		WriteChunk: func(chunk []byte) {
 			if alt == "" {
 				_, _ = c.Writer.Write([]byte("data: "))
 				_, _ = c.Writer.Write(chunk)
@@ -314,22 +363,25 @@ func (h *GeminiAPIHandler) forwardGeminiStream(c *gin.Context, flusher http.Flus
 			} else {
 				_, _ = c.Writer.Write(chunk)
 			}
-			flusher.Flush()
-		case errMsg, ok := <-errs:
-			if !ok {
-				continue
+		},
+		WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
+			if errMsg == nil {
+				return
 			}
-			if errMsg != nil {
-				h.WriteErrorResponse(c, errMsg)
-				flusher.Flush()
+			status := http.StatusInternalServerError
+			if errMsg.StatusCode > 0 {
+				status = errMsg.StatusCode
 			}
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
+			errText := http.StatusText(status)
+			if errMsg.Error != nil && errMsg.Error.Error() != "" {
+				errText = errMsg.Error.Error()
 			}
-			cancel(execErr)
-			return
-		case <-time.After(500 * time.Millisecond):
-		}
-	}
+			body := handlers.BuildErrorResponseBody(status, errText)
+			if alt == "" {
+				_, _ = fmt.Fprintf(c.Writer, "event: error\ndata: %s\n\n", string(body))
+			} else {
+				_, _ = c.Writer.Write(body)
+			}
+		},
+	})
 }

sdk/api/handlers/handlers.go

@@ -9,9 +9,12 @@ import (
 	"fmt"
 	"net/http"
 	"strings"
+	"time"
 
 	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/logging"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	coreauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 	coreexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
@@ -40,6 +43,117 @@ type ErrorDetail struct {
 	Code string `json:"code,omitempty"`
 }
 
+const idempotencyKeyMetadataKey = "idempotency_key"
+
+const (
+	defaultStreamingKeepAliveSeconds = 0
+	defaultStreamingBootstrapRetries = 0
+)
+
+// BuildErrorResponseBody builds an OpenAI-compatible JSON error response body.
+// If errText is already valid JSON, it is returned as-is to preserve upstream error payloads.
+func BuildErrorResponseBody(status int, errText string) []byte {
+	if status <= 0 {
+		status = http.StatusInternalServerError
+	}
+	if strings.TrimSpace(errText) == "" {
+		errText = http.StatusText(status)
+	}
+
+	trimmed := strings.TrimSpace(errText)
+	if trimmed != "" && json.Valid([]byte(trimmed)) {
+		return []byte(trimmed)
+	}
+
+	errType := "invalid_request_error"
+	var code string
+	switch status {
+	case http.StatusUnauthorized:
+		errType = "authentication_error"
+		code = "invalid_api_key"
+	case http.StatusForbidden:
+		errType = "permission_error"
+		code = "insufficient_quota"
+	case http.StatusTooManyRequests:
+		errType = "rate_limit_error"
+		code = "rate_limit_exceeded"
+	case http.StatusNotFound:
+		errType = "invalid_request_error"
+		code = "model_not_found"
+	default:
+		if status >= http.StatusInternalServerError {
+			errType = "server_error"
+			code = "internal_server_error"
+		}
+	}
+
+	payload, err := json.Marshal(ErrorResponse{
+		Error: ErrorDetail{
+			Message: errText,
+			Type:    errType,
+			Code:    code,
+		},
+	})
+	if err != nil {
+		return []byte(fmt.Sprintf(`{"error":{"message":%q,"type":"server_error","code":"internal_server_error"}}`, errText))
+	}
+	return payload
+}
+
+// StreamingKeepAliveInterval returns the SSE keep-alive interval for this server.
+// Returning 0 disables keep-alives (default when unset).
+func StreamingKeepAliveInterval(cfg *config.SDKConfig) time.Duration {
+	seconds := defaultStreamingKeepAliveSeconds
+	if cfg != nil && cfg.Streaming.KeepAliveSeconds != nil {
+		seconds = *cfg.Streaming.KeepAliveSeconds
+	}
+	if seconds <= 0 {
+		return 0
+	}
+	return time.Duration(seconds) * time.Second
+}
+
+// StreamingBootstrapRetries returns how many times a streaming request may be retried before any bytes are sent.
+func StreamingBootstrapRetries(cfg *config.SDKConfig) int {
+	retries := defaultStreamingBootstrapRetries
+	if cfg != nil && cfg.Streaming.BootstrapRetries != nil {
+		retries = *cfg.Streaming.BootstrapRetries
+	}
+	if retries < 0 {
+		retries = 0
+	}
+	return retries
+}
+
+func requestExecutionMetadata(ctx context.Context) map[string]any {
+	// Idempotency-Key is an optional client-supplied header used to correlate retries.
+	// It is forwarded as execution metadata; when absent we generate a UUID.
+	key := ""
+	if ctx != nil {
+		if ginCtx, ok := ctx.Value("gin").(*gin.Context); ok && ginCtx != nil && ginCtx.Request != nil {
+			key = strings.TrimSpace(ginCtx.GetHeader("Idempotency-Key"))
+		}
+	}
+	if key == "" {
+		key = uuid.NewString()
+	}
+	return map[string]any{idempotencyKeyMetadataKey: key}
+}
+
+func mergeMetadata(base, overlay map[string]any) map[string]any {
+	if len(base) == 0 && len(overlay) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(base)+len(overlay))
+	for k, v := range base {
+		out[k] = v
+	}
+	for k, v := range overlay {
+		out[k] = v
+	}
+	return out
+}
+
 // BaseAPIHandler contains the handlers for API endpoints.
 // It holds a pool of clients to interact with the backend service and manages
 // load balancing, client selection, and configuration.
@@ -104,13 +218,39 @@ func (h *BaseAPIHandler) GetAlt(c *gin.Context) string {
 // Parameters:
 //   - handler: The API handler associated with the request.
 //   - c: The Gin context of the current request.
-//   - ctx: The parent context.
+//   - ctx: The parent context (caller values/deadlines are preserved; request context adds cancellation and request ID).
 //
 // Returns:
 //   - context.Context: The new context with cancellation and embedded values.
 //   - APIHandlerCancelFunc: A function to cancel the context and log the response.
 func (h *BaseAPIHandler) GetContextWithCancel(handler interfaces.APIHandler, c *gin.Context, ctx context.Context) (context.Context, APIHandlerCancelFunc) {
-	newCtx, cancel := context.WithCancel(ctx)
+	parentCtx := ctx
+	if parentCtx == nil {
+		parentCtx = context.Background()
+	}
+
+	var requestCtx context.Context
+	if c != nil && c.Request != nil {
+		requestCtx = c.Request.Context()
+	}
+
+	if requestCtx != nil && logging.GetRequestID(parentCtx) == "" {
+		if requestID := logging.GetRequestID(requestCtx); requestID != "" {
+			parentCtx = logging.WithRequestID(parentCtx, requestID)
+		} else if requestID := logging.GetGinRequestID(c); requestID != "" {
+			parentCtx = logging.WithRequestID(parentCtx, requestID)
+		}
+	}
+	newCtx, cancel := context.WithCancel(parentCtx)
+	if requestCtx != nil && requestCtx != parentCtx {
+		go func() {
+			select {
+			case <-requestCtx.Done():
+				cancel()
+			case <-newCtx.Done():
+			}
+		}()
+	}
 	newCtx = context.WithValue(newCtx, "gin", c)
 	newCtx = context.WithValue(newCtx, "handler", handler)
 	return newCtx, func(params ...interface{}) {
@@ -183,6 +323,7 @@ func (h *BaseAPIHandler) ExecuteWithAuthManager(ctx context.Context, handlerType
 	if errMsg != nil {
 		return nil, errMsg
 	}
+	reqMeta := requestExecutionMetadata(ctx)
 	req := coreexecutor.Request{
 		Model:   normalizedModel,
 		Payload: cloneBytes(rawJSON),
@@ -196,9 +337,7 @@ func (h *BaseAPIHandler) ExecuteWithAuthManager(ctx context.Context, handlerType
 		OriginalRequest: cloneBytes(rawJSON),
 		SourceFormat:    sdktranslator.FromString(handlerType),
 	}
-	if cloned := cloneMetadata(metadata); cloned != nil {
-		opts.Metadata = cloned
-	}
+	opts.Metadata = mergeMetadata(cloneMetadata(metadata), reqMeta)
 	resp, err := h.AuthManager.Execute(ctx, providers, req, opts)
 	if err != nil {
 		status := http.StatusInternalServerError
@@ -225,6 +364,7 @@ func (h *BaseAPIHandler) ExecuteCountWithAuthManager(ctx context.Context, handle
 	if errMsg != nil {
 		return nil, errMsg
 	}
+	reqMeta := requestExecutionMetadata(ctx)
 	req := coreexecutor.Request{
 		Model:   normalizedModel,
 		Payload: cloneBytes(rawJSON),
@@ -238,9 +378,7 @@ func (h *BaseAPIHandler) ExecuteCountWithAuthManager(ctx context.Context, handle
 		OriginalRequest: cloneBytes(rawJSON),
 		SourceFormat:    sdktranslator.FromString(handlerType),
 	}
-	if cloned := cloneMetadata(metadata); cloned != nil {
-		opts.Metadata = cloned
-	}
+	opts.Metadata = mergeMetadata(cloneMetadata(metadata), reqMeta)
 	resp, err := h.AuthManager.ExecuteCount(ctx, providers, req, opts)
 	if err != nil {
 		status := http.StatusInternalServerError
@@ -270,6 +408,7 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 		close(errChan)
 		return nil, errChan
 	}
+	reqMeta := requestExecutionMetadata(ctx)
 	req := coreexecutor.Request{
 		Model:   normalizedModel,
 		Payload: cloneBytes(rawJSON),
@@ -283,9 +422,7 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 		OriginalRequest: cloneBytes(rawJSON),
 		SourceFormat:    sdktranslator.FromString(handlerType),
 	}
-	if cloned := cloneMetadata(metadata); cloned != nil {
-		opts.Metadata = cloned
-	}
+	opts.Metadata = mergeMetadata(cloneMetadata(metadata), reqMeta)
 	chunks, err := h.AuthManager.ExecuteStream(ctx, providers, req, opts)
 	if err != nil {
 		errChan := make(chan *interfaces.ErrorMessage, 1)
@@ -310,31 +447,94 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 	go func() {
 		defer close(dataChan)
 		defer close(errChan)
-		for chunk := range chunks {
-			if chunk.Err != nil {
-				status := http.StatusInternalServerError
-				if se, ok := chunk.Err.(interface{ StatusCode() int }); ok && se != nil {
-					if code := se.StatusCode(); code > 0 {
-						status = code
-					}
-				}
-				var addon http.Header
-				if he, ok := chunk.Err.(interface{ Headers() http.Header }); ok && he != nil {
-					if hdr := he.Headers(); hdr != nil {
-						addon = hdr.Clone()
-					}
-				}
-				errChan <- &interfaces.ErrorMessage{StatusCode: status, Error: chunk.Err, Addon: addon}
-				return
+		sentPayload := false
+		bootstrapRetries := 0
+		maxBootstrapRetries := StreamingBootstrapRetries(h.Cfg)
+
+		bootstrapEligible := func(err error) bool {
+			status := statusFromError(err)
+			if status == 0 {
+				return true
 			}
-			if len(chunk.Payload) > 0 {
-				dataChan <- cloneBytes(chunk.Payload)
+			switch status {
+			case http.StatusUnauthorized, http.StatusForbidden, http.StatusPaymentRequired,
+				http.StatusRequestTimeout, http.StatusTooManyRequests:
+				return true
+			default:
+				return status >= http.StatusInternalServerError
+			}
+		}
+
+	outer:
+		for {
+			for {
+				var chunk coreexecutor.StreamChunk
+				var ok bool
+				if ctx != nil {
+					select {
+					case <-ctx.Done():
+						return
+					case chunk, ok = <-chunks:
+					}
+				} else {
+					chunk, ok = <-chunks
+				}
+				if !ok {
+					return
+				}
+				if chunk.Err != nil {
+					streamErr := chunk.Err
+					// Safe bootstrap recovery: if the upstream fails before any payload bytes are sent,
+					// retry a few times (to allow auth rotation / transient recovery) and then attempt model fallback.
+					if !sentPayload {
+						if bootstrapRetries < maxBootstrapRetries && bootstrapEligible(streamErr) {
+							bootstrapRetries++
+							retryChunks, retryErr := h.AuthManager.ExecuteStream(ctx, providers, req, opts)
+							if retryErr == nil {
+								chunks = retryChunks
+								continue outer
+							}
+							streamErr = retryErr
+						}
+					}
+
+					status := http.StatusInternalServerError
+					if se, ok := streamErr.(interface{ StatusCode() int }); ok && se != nil {
+						if code := se.StatusCode(); code > 0 {
+							status = code
+						}
+					}
+					var addon http.Header
+					if he, ok := streamErr.(interface{ Headers() http.Header }); ok && he != nil {
+						if hdr := he.Headers(); hdr != nil {
+							addon = hdr.Clone()
+						}
+					}
+					errChan <- &interfaces.ErrorMessage{StatusCode: status, Error: streamErr, Addon: addon}
+					return
+				}
+				if len(chunk.Payload) > 0 {
+					sentPayload = true
+					dataChan <- cloneBytes(chunk.Payload)
+				}
 			}
 		}
 	}()
 	return dataChan, errChan
 }
 
+func statusFromError(err error) int {
+	if err == nil {
+		return 0
+	}
+	if se, ok := err.(interface{ StatusCode() int }); ok && se != nil {
+		if code := se.StatusCode(); code > 0 {
+			return code
+		}
+	}
+	return 0
+}
+
 func (h *BaseAPIHandler) getRequestDetails(modelName string) (providers []string, normalizedModel string, metadata map[string]any, err *interfaces.ErrorMessage) {
 	// Resolve "auto" model to an actual available model first
 	resolvedModelName := util.ResolveAutoModel(modelName)
@@ -418,38 +618,7 @@ func (h *BaseAPIHandler) WriteErrorResponse(c *gin.Context, msg *interfaces.Erro
 		}
 	}
 
-	// Prefer preserving upstream JSON error bodies when possible.
-	buildJSONBody := func() []byte {
-		trimmed := strings.TrimSpace(errText)
-		if trimmed != "" && json.Valid([]byte(trimmed)) {
-			return []byte(trimmed)
-		}
-		errType := "invalid_request_error"
-		switch status {
-		case http.StatusUnauthorized:
-			errType = "authentication_error"
-		case http.StatusForbidden:
-			errType = "permission_error"
-		case http.StatusTooManyRequests:
-			errType = "rate_limit_error"
-		default:
-			if status >= http.StatusInternalServerError {
-				errType = "server_error"
-			}
-		}
-		payload, err := json.Marshal(ErrorResponse{
-			Error: ErrorDetail{
-				Message: errText,
-				Type:    errType,
-			},
-		})
-		if err != nil {
-			return []byte(fmt.Sprintf(`{"error":{"message":%q,"type":"server_error"}}`, errText))
-		}
-		return payload
-	}
-
-	body := buildJSONBody()
+	body := BuildErrorResponseBody(status, errText)
 	c.Set("API_RESPONSE", bytes.Clone(body))
 
 	if !c.Writer.Written() {

sdk/api/handlers/handlers_stream_bootstrap_test.go

@@ -0,0 +1,125 @@
+package handlers
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"testing"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/registry"
+	coreauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
+	coreexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
+	sdkconfig "github.com/router-for-me/CLIProxyAPI/v6/sdk/config"
+)
+
+type failOnceStreamExecutor struct {
+	mu    sync.Mutex
+	calls int
+}
+
+func (e *failOnceStreamExecutor) Identifier() string { return "codex" }
+
+func (e *failOnceStreamExecutor) Execute(context.Context, *coreauth.Auth, coreexecutor.Request, coreexecutor.Options) (coreexecutor.Response, error) {
+	return coreexecutor.Response{}, &coreauth.Error{Code: "not_implemented", Message: "Execute not implemented"}
+}
+
+func (e *failOnceStreamExecutor) ExecuteStream(context.Context, *coreauth.Auth, coreexecutor.Request, coreexecutor.Options) (<-chan coreexecutor.StreamChunk, error) {
+	e.mu.Lock()
+	e.calls++
+	call := e.calls
+	e.mu.Unlock()
+
+	ch := make(chan coreexecutor.StreamChunk, 1)
+	if call == 1 {
+		ch <- coreexecutor.StreamChunk{
+			Err: &coreauth.Error{
+				Code:       "unauthorized",
+				Message:    "unauthorized",
+				Retryable:  false,
+				HTTPStatus: http.StatusUnauthorized,
+			},
+		}
+		close(ch)
+		return ch, nil
+	}
+
+	ch <- coreexecutor.StreamChunk{Payload: []byte("ok")}
+	close(ch)
+	return ch, nil
+}
+
+func (e *failOnceStreamExecutor) Refresh(ctx context.Context, auth *coreauth.Auth) (*coreauth.Auth, error) {
+	return auth, nil
+}
+
+func (e *failOnceStreamExecutor) CountTokens(context.Context, *coreauth.Auth, coreexecutor.Request, coreexecutor.Options) (coreexecutor.Response, error) {
+	return coreexecutor.Response{}, &coreauth.Error{Code: "not_implemented", Message: "CountTokens not implemented"}
+}
+
+func (e *failOnceStreamExecutor) Calls() int {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	return e.calls
+}
+
+func TestExecuteStreamWithAuthManager_RetriesBeforeFirstByte(t *testing.T) {
+	executor := &failOnceStreamExecutor{}
+	manager := coreauth.NewManager(nil, nil, nil)
+	manager.RegisterExecutor(executor)
+
+	auth1 := &coreauth.Auth{
+		ID:       "auth1",
+		Provider: "codex",
+		Status:   coreauth.StatusActive,
+		Metadata: map[string]any{"email": "test1@example.com"},
+	}
+	if _, err := manager.Register(context.Background(), auth1); err != nil {
+		t.Fatalf("manager.Register(auth1): %v", err)
+	}
+
+	auth2 := &coreauth.Auth{
+		ID:       "auth2",
+		Provider: "codex",
+		Status:   coreauth.StatusActive,
+		Metadata: map[string]any{"email": "test2@example.com"},
+	}
+	if _, err := manager.Register(context.Background(), auth2); err != nil {
+		t.Fatalf("manager.Register(auth2): %v", err)
+	}
+
+	registry.GetGlobalRegistry().RegisterClient(auth1.ID, auth1.Provider, []*registry.ModelInfo{{ID: "test-model"}})
+	registry.GetGlobalRegistry().RegisterClient(auth2.ID, auth2.Provider, []*registry.ModelInfo{{ID: "test-model"}})
+	t.Cleanup(func() {
+		registry.GetGlobalRegistry().UnregisterClient(auth1.ID)
+		registry.GetGlobalRegistry().UnregisterClient(auth2.ID)
+	})
+
+	bootstrapRetries := 1
+	handler := NewBaseAPIHandlers(&sdkconfig.SDKConfig{
+		Streaming: sdkconfig.StreamingConfig{
+			BootstrapRetries: &bootstrapRetries,
+		},
+	}, manager)
+	dataChan, errChan := handler.ExecuteStreamWithAuthManager(context.Background(), "openai", "test-model", []byte(`{"model":"test-model"}`), "")
+	if dataChan == nil || errChan == nil {
+		t.Fatalf("expected non-nil channels")
+	}
+
+	var got []byte
+	for chunk := range dataChan {
+		got = append(got, chunk...)
+	}
+
+	for msg := range errChan {
+		if msg != nil {
+			t.Fatalf("unexpected error: %+v", msg)
+		}
+	}
+
+	if string(got) != "ok" {
+		t.Fatalf("expected payload ok, got %q", string(got))
+	}
+	if executor.Calls() != 2 {
+		t.Fatalf("expected 2 stream attempts, got %d", executor.Calls())
+	}
+}

sdk/api/handlers/openai/openai_handlers.go

@@ -11,7 +11,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
-	"time"
+	"sync"
 
 	"github.com/gin-gonic/gin"
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/constant"
@@ -443,11 +443,6 @@ func (h *OpenAIAPIHandler) handleNonStreamingResponse(c *gin.Context, rawJSON []
 //   - c: The Gin context containing the HTTP request and response
 //   - rawJSON: The raw JSON bytes of the OpenAI-compatible request
 func (h *OpenAIAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON []byte) {
-	c.Header("Content-Type", "text/event-stream")
-	c.Header("Cache-Control", "no-cache")
-	c.Header("Connection", "keep-alive")
-	c.Header("Access-Control-Allow-Origin", "*")
-
 	// Get the http.Flusher interface to manually flush the response.
 	flusher, ok := c.Writer.(http.Flusher)
 	if !ok {
@@ -463,7 +458,55 @@ func (h *OpenAIAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON []byt
 	modelName := gjson.GetBytes(rawJSON, "model").String()
 	cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
 	dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, h.GetAlt(c))
-	h.handleStreamResult(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
+
+	setSSEHeaders := func() {
+		c.Header("Content-Type", "text/event-stream")
+		c.Header("Cache-Control", "no-cache")
+		c.Header("Connection", "keep-alive")
+		c.Header("Access-Control-Allow-Origin", "*")
+	}
+
+	// Peek at the first chunk to determine success or failure before setting headers
+	for {
+		select {
+		case <-c.Request.Context().Done():
+			cliCancel(c.Request.Context().Err())
+			return
+		case errMsg, ok := <-errChan:
+			if !ok {
+				// Err channel closed cleanly; wait for data channel.
+				errChan = nil
+				continue
+			}
+			// Upstream failed immediately. Return proper error status and JSON.
+			h.WriteErrorResponse(c, errMsg)
+			if errMsg != nil {
+				cliCancel(errMsg.Error)
+			} else {
+				cliCancel(nil)
+			}
+			return
+		case chunk, ok := <-dataChan:
+			if !ok {
+				// Stream closed without data? Send DONE or just headers.
+				setSSEHeaders()
+				_, _ = fmt.Fprintf(c.Writer, "data: [DONE]\n\n")
+				flusher.Flush()
+				cliCancel(nil)
+				return
+			}
+
+			// Success! Commit to streaming headers.
+			setSSEHeaders()
+
+			_, _ = fmt.Fprintf(c.Writer, "data: %s\n\n", string(chunk))
+			flusher.Flush()
+
+			// Continue streaming the rest
+			h.handleStreamResult(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
+			return
+		}
+	}
 }
 
 // handleCompletionsNonStreamingResponse handles non-streaming completions responses.
@@ -500,11 +543,6 @@ func (h *OpenAIAPIHandler) handleCompletionsNonStreamingResponse(c *gin.Context,
 //   - c: The Gin context containing the HTTP request and response
 //   - rawJSON: The raw JSON bytes of the OpenAI-compatible completions request
 func (h *OpenAIAPIHandler) handleCompletionsStreamingResponse(c *gin.Context, rawJSON []byte) {
-	c.Header("Content-Type", "text/event-stream")
-	c.Header("Cache-Control", "no-cache")
-	c.Header("Connection", "keep-alive")
-	c.Header("Access-Control-Allow-Origin", "*")
-
 	// Get the http.Flusher interface to manually flush the response.
 	flusher, ok := c.Writer.(http.Flusher)
 	if !ok {
@@ -524,71 +562,109 @@ func (h *OpenAIAPIHandler) handleCompletionsStreamingResponse(c *gin.Context, ra
 	cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
 	dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, chatCompletionsJSON, "")
 
+	setSSEHeaders := func() {
+		c.Header("Content-Type", "text/event-stream")
+		c.Header("Cache-Control", "no-cache")
+		c.Header("Connection", "keep-alive")
+		c.Header("Access-Control-Allow-Origin", "*")
+	}
+
+	// Peek at the first chunk
 	for {
 		select {
 		case <-c.Request.Context().Done():
 			cliCancel(c.Request.Context().Err())
 			return
-		case chunk, isOk := <-dataChan:
-			if !isOk {
+		case errMsg, ok := <-errChan:
+			if !ok {
+				// Err channel closed cleanly; wait for data channel.
+				errChan = nil
+				continue
+			}
+			h.WriteErrorResponse(c, errMsg)
+			if errMsg != nil {
+				cliCancel(errMsg.Error)
+			} else {
+				cliCancel(nil)
+			}
+			return
+		case chunk, ok := <-dataChan:
+			if !ok {
+				setSSEHeaders()
 				_, _ = fmt.Fprintf(c.Writer, "data: [DONE]\n\n")
 				flusher.Flush()
-				cliCancel()
+				cliCancel(nil)
 				return
 			}
+
+			// Success! Set headers.
+			setSSEHeaders()
+
+			// Write the first chunk
 			converted := convertChatCompletionsStreamChunkToCompletions(chunk)
 			if converted != nil {
 				_, _ = fmt.Fprintf(c.Writer, "data: %s\n\n", string(converted))
 				flusher.Flush()
 			}
-		case errMsg, isOk := <-errChan:
-			if !isOk {
-				continue
-			}
-			if errMsg != nil {
-				h.WriteErrorResponse(c, errMsg)
-				flusher.Flush()
-			}
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
-			}
-			cliCancel(execErr)
+
+			done := make(chan struct{})
+			var doneOnce sync.Once
+			stop := func() { doneOnce.Do(func() { close(done) }) }
+
+			convertedChan := make(chan []byte)
+			go func() {
+				defer close(convertedChan)
+				for {
+					select {
+					case <-done:
+						return
+					case chunk, ok := <-dataChan:
+						if !ok {
+							return
+						}
+						converted := convertChatCompletionsStreamChunkToCompletions(chunk)
+						if converted == nil {
+							continue
+						}
+						select {
+						case <-done:
+							return
+						case convertedChan <- converted:
+						}
+					}
+				}
+			}()
+
+			h.handleStreamResult(c, flusher, func(err error) {
+				stop()
+				cliCancel(err)
+			}, convertedChan, errChan)
 			return
-		case <-time.After(500 * time.Millisecond):
 		}
 	}
 }
 func (h *OpenAIAPIHandler) handleStreamResult(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
-	for {
-		select {
-		case <-c.Request.Context().Done():
-			cancel(c.Request.Context().Err())
-			return
-		case chunk, ok := <-data:
-			if !ok {
-				_, _ = fmt.Fprintf(c.Writer, "data: [DONE]\n\n")
-				flusher.Flush()
-				cancel(nil)
+	h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
+		WriteChunk: func(chunk []byte) {
+			_, _ = fmt.Fprintf(c.Writer, "data: %s\n\n", string(chunk))
+		},
+		WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
+			if errMsg == nil {
 				return
 			}
-			_, _ = fmt.Fprintf(c.Writer, "data: %s\n\n", string(chunk))
-			flusher.Flush()
-		case errMsg, ok := <-errs:
-			if !ok {
-				continue
+			status := http.StatusInternalServerError
+			if errMsg.StatusCode > 0 {
+				status = errMsg.StatusCode
 			}
-			if errMsg != nil {
-				h.WriteErrorResponse(c, errMsg)
-				flusher.Flush()
+			errText := http.StatusText(status)
+			if errMsg.Error != nil && errMsg.Error.Error() != "" {
+				errText = errMsg.Error.Error()
 			}
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
-			}
-			cancel(execErr)
-			return
-		case <-time.After(500 * time.Millisecond):
-		}
-	}
+			body := handlers.BuildErrorResponseBody(status, errText)
+			_, _ = fmt.Fprintf(c.Writer, "data: %s\n\n", string(body))
+		},
+		WriteDone: func() {
+			_, _ = fmt.Fprint(c.Writer, "data: [DONE]\n\n")
+		},
+	})
 }

sdk/api/handlers/openai/openai_responses_handlers.go

@@ -11,7 +11,6 @@ import (
 	"context"
 	"fmt"
 	"net/http"
-	"time"
 
 	"github.com/gin-gonic/gin"
 	. "github.com/router-for-me/CLIProxyAPI/v6/internal/constant"
@@ -128,11 +127,6 @@ func (h *OpenAIResponsesAPIHandler) handleNonStreamingResponse(c *gin.Context, r
 //   - c: The Gin context containing the HTTP request and response
 //   - rawJSON: The raw JSON bytes of the OpenAIResponses-compatible request
 func (h *OpenAIResponsesAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON []byte) {
-	c.Header("Content-Type", "text/event-stream")
-	c.Header("Cache-Control", "no-cache")
-	c.Header("Connection", "keep-alive")
-	c.Header("Access-Control-Allow-Origin", "*")
-
 	// Get the http.Flusher interface to manually flush the response.
 	flusher, ok := c.Writer.(http.Flusher)
 	if !ok {
@@ -149,46 +143,88 @@ func (h *OpenAIResponsesAPIHandler) handleStreamingResponse(c *gin.Context, rawJ
 	modelName := gjson.GetBytes(rawJSON, "model").String()
 	cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
 	dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, "")
-	h.forwardResponsesStream(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
-	return
-}
 
-func (h *OpenAIResponsesAPIHandler) forwardResponsesStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
+	setSSEHeaders := func() {
+		c.Header("Content-Type", "text/event-stream")
+		c.Header("Cache-Control", "no-cache")
+		c.Header("Connection", "keep-alive")
+		c.Header("Access-Control-Allow-Origin", "*")
+	}
+
+	// Peek at the first chunk
 	for {
 		select {
 		case <-c.Request.Context().Done():
-			cancel(c.Request.Context().Err())
+			cliCancel(c.Request.Context().Err())
 			return
-		case chunk, ok := <-data:
+		case errMsg, ok := <-errChan:
 			if !ok {
+				// Err channel closed cleanly; wait for data channel.
+				errChan = nil
+				continue
+			}
+			// Upstream failed immediately. Return proper error status and JSON.
+			h.WriteErrorResponse(c, errMsg)
+			if errMsg != nil {
+				cliCancel(errMsg.Error)
+			} else {
+				cliCancel(nil)
+			}
+			return
+		case chunk, ok := <-dataChan:
+			if !ok {
+				// Stream closed without data? Send headers and done.
+				setSSEHeaders()
 				_, _ = c.Writer.Write([]byte("\n"))
 				flusher.Flush()
-				cancel(nil)
+				cliCancel(nil)
 				return
 			}
 
+			// Success! Set headers.
+			setSSEHeaders()
+
+			// Write first chunk logic (matching forwardResponsesStream)
 			if bytes.HasPrefix(chunk, []byte("event:")) {
 				_, _ = c.Writer.Write([]byte("\n"))
 			}
 			_, _ = c.Writer.Write(chunk)
 			_, _ = c.Writer.Write([]byte("\n"))
-
 			flusher.Flush()
-		case errMsg, ok := <-errs:
-			if !ok {
-				continue
-			}
-			if errMsg != nil {
-				h.WriteErrorResponse(c, errMsg)
-				flusher.Flush()
-			}
-			var execErr error
-			if errMsg != nil {
-				execErr = errMsg.Error
-			}
-			cancel(execErr)
+
+			// Continue
+			h.forwardResponsesStream(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
 			return
-		case <-time.After(500 * time.Millisecond):
 		}
 	}
 }
+
+func (h *OpenAIResponsesAPIHandler) forwardResponsesStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
+	h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
+		WriteChunk: func(chunk []byte) {
+			if bytes.HasPrefix(chunk, []byte("event:")) {
+				_, _ = c.Writer.Write([]byte("\n"))
+			}
+			_, _ = c.Writer.Write(chunk)
+			_, _ = c.Writer.Write([]byte("\n"))
+		},
+		WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
+			if errMsg == nil {
+				return
+			}
+			status := http.StatusInternalServerError
+			if errMsg.StatusCode > 0 {
+				status = errMsg.StatusCode
+			}
+			errText := http.StatusText(status)
+			if errMsg.Error != nil && errMsg.Error.Error() != "" {
+				errText = errMsg.Error.Error()
+			}
+			body := handlers.BuildErrorResponseBody(status, errText)
+			_, _ = fmt.Fprintf(c.Writer, "\nevent: error\ndata: %s\n\n", string(body))
+		},
+		WriteDone: func() {
+			_, _ = c.Writer.Write([]byte("\n"))
+		},
+	})
+}

sdk/api/handlers/stream_forwarder.go

@@ -0,0 +1,121 @@
+package handlers
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
+)
+
+type StreamForwardOptions struct {
+	// KeepAliveInterval overrides the configured streaming keep-alive interval.
+	// If nil, the configured default is used. If set to <= 0, keep-alives are disabled.
+	KeepAliveInterval *time.Duration
+
+	// WriteChunk writes a single data chunk to the response body. It should not flush.
+	WriteChunk func(chunk []byte)
+
+	// WriteTerminalError writes an error payload to the response body when streaming fails
+	// after headers have already been committed. It should not flush.
+	WriteTerminalError func(errMsg *interfaces.ErrorMessage)
+
+	// WriteDone optionally writes a terminal marker when the upstream data channel closes
+	// without an error (e.g. OpenAI's `[DONE]`). It should not flush.
+	WriteDone func()
+
+	// WriteKeepAlive optionally writes a keep-alive heartbeat. It should not flush.
+	// When nil, a standard SSE comment heartbeat is used.
+	WriteKeepAlive func()
+}
+
+func (h *BaseAPIHandler) ForwardStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage, opts StreamForwardOptions) {
+	if c == nil {
+		return
+	}
+	if cancel == nil {
+		return
+	}
+
+	writeChunk := opts.WriteChunk
+	if writeChunk == nil {
+		writeChunk = func([]byte) {}
+	}
+
+	writeKeepAlive := opts.WriteKeepAlive
+	if writeKeepAlive == nil {
+		writeKeepAlive = func() {
+			_, _ = c.Writer.Write([]byte(": keep-alive\n\n"))
+		}
+	}
+
+	keepAliveInterval := StreamingKeepAliveInterval(h.Cfg)
+	if opts.KeepAliveInterval != nil {
+		keepAliveInterval = *opts.KeepAliveInterval
+	}
+	var keepAlive *time.Ticker
+	var keepAliveC <-chan time.Time
+	if keepAliveInterval > 0 {
+		keepAlive = time.NewTicker(keepAliveInterval)
+		defer keepAlive.Stop()
+		keepAliveC = keepAlive.C
+	}
+
+	var terminalErr *interfaces.ErrorMessage
+	for {
+		select {
+		case <-c.Request.Context().Done():
+			cancel(c.Request.Context().Err())
+			return
+		case chunk, ok := <-data:
+			if !ok {
+				// Prefer surfacing a terminal error if one is pending.
+				if terminalErr == nil {
+					select {
+					case errMsg, ok := <-errs:
+						if ok && errMsg != nil {
+							terminalErr = errMsg
+						}
+					default:
+					}
+				}
+				if terminalErr != nil {
+					if opts.WriteTerminalError != nil {
+						opts.WriteTerminalError(terminalErr)
+					}
+					flusher.Flush()
+					cancel(terminalErr.Error)
+					return
+				}
+				if opts.WriteDone != nil {
+					opts.WriteDone()
+				}
+				flusher.Flush()
+				cancel(nil)
+				return
+			}
+			writeChunk(chunk)
+			flusher.Flush()
+		case errMsg, ok := <-errs:
+			if !ok {
+				continue
+			}
+			if errMsg != nil {
+				terminalErr = errMsg
+				if opts.WriteTerminalError != nil {
+					opts.WriteTerminalError(errMsg)
+					flusher.Flush()
+				}
+			}
+			var execErr error
+			if errMsg != nil {
+				execErr = errMsg.Error
+			}
+			cancel(execErr)
+			return
+		case <-keepAliveC:
+			writeKeepAlive()
+			flusher.Flush()
+		}
+	}
+}

sdk/auth/kiro.go

@@ -53,20 +53,8 @@ func (a *KiroAuthenticator) RefreshLead() *time.Duration {
 	return &d
 }
 
-// Login performs OAuth login for Kiro with AWS Builder ID.
-func (a *KiroAuthenticator) Login(ctx context.Context, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, error) {
-	if cfg == nil {
-		return nil, fmt.Errorf("kiro auth: configuration is required")
-	}
-
-	oauth := kiroauth.NewKiroOAuth(cfg)
-
-	// Use AWS Builder ID device code flow
-	tokenData, err := oauth.LoginWithBuilderID(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("login failed: %w", err)
-	}
-
+// createAuthRecord creates an auth record from token data.
+func (a *KiroAuthenticator) createAuthRecord(tokenData *kiroauth.KiroTokenData, source string) (*coreauth.Auth, error) {
 	// Parse expires_at
 	expiresAt, err := time.Parse(time.RFC3339, tokenData.ExpiresAt)
 	if err != nil {
@@ -76,34 +64,63 @@ func (a *KiroAuthenticator) Login(ctx context.Context, cfg *config.Config, opts
 	// Extract identifier for file naming
 	idPart := extractKiroIdentifier(tokenData.Email, tokenData.ProfileArn)
 
+	// Determine label based on auth method
+	label := fmt.Sprintf("kiro-%s", source)
+	if tokenData.AuthMethod == "idc" {
+		label = "kiro-idc"
+	}
+
 	now := time.Now()
-	fileName := fmt.Sprintf("kiro-aws-%s.json", idPart)
+	fileName := fmt.Sprintf("%s-%s.json", label, idPart)
+
+	metadata := map[string]any{
+		"type":          "kiro",
+		"access_token":  tokenData.AccessToken,
+		"refresh_token": tokenData.RefreshToken,
+		"profile_arn":   tokenData.ProfileArn,
+		"expires_at":    tokenData.ExpiresAt,
+		"auth_method":   tokenData.AuthMethod,
+		"provider":      tokenData.Provider,
+		"client_id":     tokenData.ClientID,
+		"client_secret": tokenData.ClientSecret,
+		"email":         tokenData.Email,
+	}
+
+	// Add IDC-specific fields if present
+	if tokenData.StartURL != "" {
+		metadata["start_url"] = tokenData.StartURL
+	}
+	if tokenData.Region != "" {
+		metadata["region"] = tokenData.Region
+	}
+
+	attributes := map[string]string{
+		"profile_arn": tokenData.ProfileArn,
+		"source":      source,
+		"email":       tokenData.Email,
+	}
+
+	// Add IDC-specific attributes if present
+	if tokenData.AuthMethod == "idc" {
+		attributes["source"] = "aws-idc"
+		if tokenData.StartURL != "" {
+			attributes["start_url"] = tokenData.StartURL
+		}
+		if tokenData.Region != "" {
+			attributes["region"] = tokenData.Region
+		}
+	}
 
 	record := &coreauth.Auth{
 		ID:        fileName,
 		Provider:  "kiro",
 		FileName:  fileName,
-		Label:     "kiro-aws",
+		Label:     label,
 		Status:    coreauth.StatusActive,
 		CreatedAt: now,
 		UpdatedAt: now,
-		Metadata: map[string]any{
-			"type":          "kiro",
-			"access_token":  tokenData.AccessToken,
-			"refresh_token": tokenData.RefreshToken,
-			"profile_arn":   tokenData.ProfileArn,
-			"expires_at":    tokenData.ExpiresAt,
-			"auth_method":   tokenData.AuthMethod,
-			"provider":      tokenData.Provider,
-			"client_id":     tokenData.ClientID,
-			"client_secret": tokenData.ClientSecret,
-			"email":         tokenData.Email,
-		},
-		Attributes: map[string]string{
-			"profile_arn": tokenData.ProfileArn,
-			"source":      "aws-builder-id",
-			"email":       tokenData.Email,
-		},
+		Metadata:  metadata,
+		Attributes: attributes,
 		// NextRefreshAfter is aligned with RefreshLead (5min)
 		NextRefreshAfter: expiresAt.Add(-5 * time.Minute),
 	}
@@ -117,6 +134,23 @@ func (a *KiroAuthenticator) Login(ctx context.Context, cfg *config.Config, opts
 	return record, nil
 }
 
+// Login performs OAuth login for Kiro with AWS (Builder ID or IDC).
+// This shows a method selection prompt and handles both flows.
+func (a *KiroAuthenticator) Login(ctx context.Context, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, error) {
+	if cfg == nil {
+		return nil, fmt.Errorf("kiro auth: configuration is required")
+	}
+
+	// Use the unified method selection flow (Builder ID or IDC)
+	ssoClient := kiroauth.NewSSOOIDCClient(cfg)
+	tokenData, err := ssoClient.LoginWithMethodSelection(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("login failed: %w", err)
+	}
+
+	return a.createAuthRecord(tokenData, "aws")
+}
+
 // LoginWithAuthCode performs OAuth login for Kiro with AWS Builder ID using authorization code flow.
 // This provides a better UX than device code flow as it uses automatic browser callback.
 func (a *KiroAuthenticator) LoginWithAuthCode(ctx context.Context, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, error) {
@@ -388,15 +422,23 @@ func (a *KiroAuthenticator) Refresh(ctx context.Context, cfg *config.Config, aut
 	clientID, _ := auth.Metadata["client_id"].(string)
 	clientSecret, _ := auth.Metadata["client_secret"].(string)
 	authMethod, _ := auth.Metadata["auth_method"].(string)
+	startURL, _ := auth.Metadata["start_url"].(string)
+	region, _ := auth.Metadata["region"].(string)
 
 	var tokenData *kiroauth.KiroTokenData
 	var err error
 
-	// Use SSO OIDC refresh for AWS Builder ID, otherwise use Kiro's OAuth refresh endpoint
-	if clientID != "" && clientSecret != "" && authMethod == "builder-id" {
-		ssoClient := kiroauth.NewSSOOIDCClient(cfg)
+	ssoClient := kiroauth.NewSSOOIDCClient(cfg)
+
+	// Use SSO OIDC refresh for AWS Builder ID or IDC, otherwise use Kiro's OAuth refresh endpoint
+	switch {
+	case clientID != "" && clientSecret != "" && authMethod == "idc" && region != "":
+		// IDC refresh with region-specific endpoint
+		tokenData, err = ssoClient.RefreshTokenWithRegion(ctx, clientID, clientSecret, refreshToken, region, startURL)
+	case clientID != "" && clientSecret != "" && authMethod == "builder-id":
+		// Builder ID refresh with default endpoint
 		tokenData, err = ssoClient.RefreshToken(ctx, clientID, clientSecret, refreshToken)
-	} else {
+	default:
 		// Fallback to Kiro's refresh endpoint (for social auth: Google/GitHub)
 		oauth := kiroauth.NewKiroOAuth(cfg)
 		tokenData, err = oauth.RefreshToken(ctx, refreshToken)

sdk/cliproxy/auth/conductor.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/logging"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/registry"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
@@ -202,10 +203,10 @@ func (m *Manager) Register(ctx context.Context, auth *Auth) (*Auth, error) {
 	if auth == nil {
 		return nil, nil
 	}
-	auth.EnsureIndex()
 	if auth.ID == "" {
 		auth.ID = uuid.NewString()
 	}
+	auth.EnsureIndex()
 	m.mu.Lock()
 	m.auths[auth.ID] = auth.Clone()
 	m.mu.Unlock()
@@ -220,7 +221,7 @@ 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 == 0 {
+	if existing, ok := m.auths[auth.ID]; ok && existing != nil && !auth.indexAssigned && auth.Index == "" {
 		auth.Index = existing.Index
 		auth.indexAssigned = existing.indexAssigned
 	}
@@ -389,17 +390,18 @@ func (m *Manager) executeWithProvider(ctx context.Context, provider string, req
 
 		accountType, accountInfo := auth.AccountInfo()
 		proxyInfo := auth.ProxyInfo()
+		entry := logEntryWithRequestID(ctx)
 		if accountType == "api_key" {
 			if proxyInfo != "" {
-				log.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
+				entry.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
+				entry.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
 			}
 		} else if accountType == "oauth" {
 			if proxyInfo != "" {
-				log.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
+				entry.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
+				entry.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
 			}
 		}
 
@@ -449,17 +451,18 @@ func (m *Manager) executeCountWithProvider(ctx context.Context, provider string,
 
 		accountType, accountInfo := auth.AccountInfo()
 		proxyInfo := auth.ProxyInfo()
+		entry := logEntryWithRequestID(ctx)
 		if accountType == "api_key" {
 			if proxyInfo != "" {
-				log.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
+				entry.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
+				entry.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
 			}
 		} else if accountType == "oauth" {
 			if proxyInfo != "" {
-				log.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
+				entry.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
+				entry.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
 			}
 		}
 
@@ -509,17 +512,18 @@ func (m *Manager) executeStreamWithProvider(ctx context.Context, provider string
 
 		accountType, accountInfo := auth.AccountInfo()
 		proxyInfo := auth.ProxyInfo()
+		entry := logEntryWithRequestID(ctx)
 		if accountType == "api_key" {
 			if proxyInfo != "" {
-				log.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
+				entry.Debugf("Use API key %s for model %s %s", util.HideAPIKey(accountInfo), req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
+				entry.Debugf("Use API key %s for model %s", util.HideAPIKey(accountInfo), req.Model)
 			}
 		} else if accountType == "oauth" {
 			if proxyInfo != "" {
-				log.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
+				entry.Debugf("Use OAuth %s for model %s %s", accountInfo, req.Model, proxyInfo)
 			} else {
-				log.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
+				entry.Debugf("Use OAuth %s for model %s", accountInfo, req.Model)
 			}
 		}
 
@@ -1606,6 +1610,17 @@ type RequestPreparer interface {
 	PrepareRequest(req *http.Request, auth *Auth) error
 }
 
+// logEntryWithRequestID returns a logrus entry with request_id field if available in context.
+func logEntryWithRequestID(ctx context.Context) *log.Entry {
+	if ctx == nil {
+		return log.NewEntry(log.StandardLogger())
+	}
+	if reqID := logging.GetRequestID(ctx); reqID != "" {
+		return log.WithField("request_id", reqID)
+	}
+	return log.NewEntry(log.StandardLogger())
+}
+
 // InjectCredentials delegates per-provider HTTP request preparation when supported.
 // If the registered executor for the auth provider implements RequestPreparer,
 // it will be invoked to modify the request (e.g., add headers).

sdk/cliproxy/auth/types.go

@@ -1,11 +1,12 @@
 package auth
 
 import (
+	"crypto/sha256"
+	"encoding/hex"
 	"encoding/json"
 	"strconv"
 	"strings"
 	"sync"
-	"sync/atomic"
 	"time"
 
 	baseauth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth"
@@ -15,8 +16,8 @@ import (
 type Auth struct {
 	// ID uniquely identifies the auth record across restarts.
 	ID string `json:"id"`
-	// Index is a monotonically increasing runtime identifier used for diagnostics.
-	Index uint64 `json:"-"`
+	// Index is a stable runtime identifier derived from auth metadata (not persisted).
+	Index string `json:"-"`
 	// Provider is the upstream provider key (e.g. "gemini", "claude").
 	Provider string `json:"provider"`
 	// Prefix optionally namespaces models for routing (e.g., "teamA/gemini-3-pro-preview").
@@ -94,12 +95,6 @@ type ModelState struct {
 	UpdatedAt time.Time `json:"updated_at"`
 }
 
-var authIndexCounter atomic.Uint64
-
-func nextAuthIndex() uint64 {
-	return authIndexCounter.Add(1) - 1
-}
-
 // Clone shallow copies the Auth structure, duplicating maps to avoid accidental mutation.
 func (a *Auth) Clone() *Auth {
 	if a == nil {
@@ -128,15 +123,41 @@ func (a *Auth) Clone() *Auth {
 	return &copyAuth
 }
 
-// EnsureIndex returns the global index, assigning one if it was not set yet.
-func (a *Auth) EnsureIndex() uint64 {
-	if a == nil {
-		return 0
+func stableAuthIndex(seed string) string {
+	seed = strings.TrimSpace(seed)
+	if seed == "" {
+		return ""
 	}
-	if a.indexAssigned {
+	sum := sha256.Sum256([]byte(seed))
+	return hex.EncodeToString(sum[:8])
+}
+
+// EnsureIndex returns a stable index derived from the auth file name or API key.
+func (a *Auth) EnsureIndex() string {
+	if a == nil {
+		return ""
+	}
+	if a.indexAssigned && a.Index != "" {
 		return a.Index
 	}
-	idx := nextAuthIndex()
+
+	seed := strings.TrimSpace(a.FileName)
+	if seed != "" {
+		seed = "file:" + seed
+	} else if a.Attributes != nil {
+		if apiKey := strings.TrimSpace(a.Attributes["api_key"]); apiKey != "" {
+			seed = "api_key:" + apiKey
+		}
+	}
+	if seed == "" {
+		if id := strings.TrimSpace(a.ID); id != "" {
+			seed = "id:" + id
+		} else {
+			return ""
+		}
+	}
+
+	idx := stableAuthIndex(seed)
 	a.Index = idx
 	a.indexAssigned = true
 	return idx

sdk/cliproxy/usage/manager.go

@@ -14,7 +14,7 @@ type Record struct {
 	Model       string
 	APIKey      string
 	AuthID      string
-	AuthIndex   uint64
+	AuthIndex   string
 	Source      string
 	RequestedAt time.Time
 	Failed      bool

sdk/config/config.go

@@ -12,6 +12,7 @@ type AccessProvider = internalconfig.AccessProvider
 
 type Config = internalconfig.Config
 
+type StreamingConfig = internalconfig.StreamingConfig
 type TLSConfig = internalconfig.TLSConfig
 type RemoteManagement = internalconfig.RemoteManagement
 type AmpCode = internalconfig.AmpCode