**fix(translator): preserve raw JSON encoding in function call outputs**

- Updated handling of `output` in `gemini_openai-responses_request.go` to use `.Raw` instead of `.String` for preserving original JSON encoding.
- Ensured proper setting of raw JSON output when constructing `functionResponse`.

internal/api/modules/amp/amp.go

@@ -181,5 +181,3 @@ func (m *AmpModule) OnConfigUpdated(cfg *config.Config) error {
 	log.Debug("Amp config updated (restart required for URL changes)")
 	return nil
 }
-
-

internal/api/modules/amp/proxy.go

@@ -83,7 +83,7 @@ func createReverseProxy(upstreamURL string, secretSource SecretSource) (*httputi
 		// Peek at first 2 bytes to detect gzip magic bytes
 		header := make([]byte, 2)
 		n, _ := io.ReadFull(originalBody, header)
-		
+
 		// Check for gzip magic bytes (0x1f 0x8b)
 		// If n < 2, we didn't get enough bytes, so it's not gzip
 		if n >= 2 && header[0] == 0x1f && header[1] == 0x8b {
@@ -97,7 +97,7 @@ func createReverseProxy(upstreamURL string, secretSource SecretSource) (*httputi
 				}
 				return nil
 			}
-			
+
 			// Reconstruct complete gzipped data
 			gzippedData := append(header[:n], rest...)
 
@@ -129,8 +129,8 @@ func createReverseProxy(upstreamURL string, secretSource SecretSource) (*httputi
 			resp.ContentLength = int64(len(decompressed))
 
 			// Update headers to reflect decompressed state
-			resp.Header.Del("Content-Encoding")                                      // No longer compressed
-			resp.Header.Del("Content-Length")                                        // Remove stale compressed length
+			resp.Header.Del("Content-Encoding")                                          // No longer compressed
+			resp.Header.Del("Content-Length")                                            // Remove stale compressed length
 			resp.Header.Set("Content-Length", strconv.FormatInt(resp.ContentLength, 10)) // Set decompressed length
 
 			log.Debugf("amp proxy: decompressed gzip response (%d -> %d bytes)", len(gzippedData), len(decompressed))

internal/api/modules/amp/proxy_test.go

@@ -440,52 +440,52 @@ func TestIsStreamingResponse(t *testing.T) {
 
 func TestFilterBetaFeatures(t *testing.T) {
 	tests := []struct {
-		name           string
-		header         string
+		name            string
+		header          string
 		featureToRemove string
-		expected       string
+		expected        string
 	}{
 		{
-			name:           "Remove context-1m from middle",
-			header:         "fine-grained-tool-streaming-2025-05-14,context-1m-2025-08-07,oauth-2025-04-20",
+			name:            "Remove context-1m from middle",
+			header:          "fine-grained-tool-streaming-2025-05-14,context-1m-2025-08-07,oauth-2025-04-20",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
+			expected:        "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
 		},
 		{
-			name:           "Remove context-1m from start",
-			header:         "context-1m-2025-08-07,fine-grained-tool-streaming-2025-05-14",
+			name:            "Remove context-1m from start",
+			header:          "context-1m-2025-08-07,fine-grained-tool-streaming-2025-05-14",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "fine-grained-tool-streaming-2025-05-14",
+			expected:        "fine-grained-tool-streaming-2025-05-14",
 		},
 		{
-			name:           "Remove context-1m from end",
-			header:         "fine-grained-tool-streaming-2025-05-14,context-1m-2025-08-07",
+			name:            "Remove context-1m from end",
+			header:          "fine-grained-tool-streaming-2025-05-14,context-1m-2025-08-07",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "fine-grained-tool-streaming-2025-05-14",
+			expected:        "fine-grained-tool-streaming-2025-05-14",
 		},
 		{
-			name:           "Feature not present",
-			header:         "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
+			name:            "Feature not present",
+			header:          "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
+			expected:        "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
 		},
 		{
-			name:           "Only feature to remove",
-			header:         "context-1m-2025-08-07",
+			name:            "Only feature to remove",
+			header:          "context-1m-2025-08-07",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "",
+			expected:        "",
 		},
 		{
-			name:           "Empty header",
-			header:         "",
+			name:            "Empty header",
+			header:          "",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "",
+			expected:        "",
 		},
 		{
-			name:           "Header with spaces",
-			header:         "fine-grained-tool-streaming-2025-05-14, context-1m-2025-08-07 , oauth-2025-04-20",
+			name:            "Header with spaces",
+			header:          "fine-grained-tool-streaming-2025-05-14, context-1m-2025-08-07 , oauth-2025-04-20",
 			featureToRemove: "context-1m-2025-08-07",
-			expected:       "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
+			expected:        "fine-grained-tool-streaming-2025-05-14,oauth-2025-04-20",
 		},
 	}
 

internal/api/modules/amp/routes.go

@@ -6,11 +6,11 @@ import (
 	"strings"
 
 	"github.com/gin-gonic/gin"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers"
 	"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers/claude"
 	"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers/gemini"
 	"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers/openai"
-	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	log "github.com/sirupsen/logrus"
 )
 

internal/registry/model_registry.go

@@ -826,7 +826,6 @@ func (r *ModelRegistry) CleanupExpiredQuotas() {
 	}
 }
 
-
 // GetFirstAvailableModel returns the first available model for the given handler type.
 // It prioritizes models by their creation timestamp (newest first) and checks if they have
 // available clients that are not suspended or over quota.

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

@@ -105,14 +105,19 @@ func ConvertAntigravityResponseToOpenAI(_ context.Context, _ string, originalReq
 			partTextResult := partResult.Get("text")
 			functionCallResult := partResult.Get("functionCall")
 			thoughtSignatureResult := partResult.Get("thoughtSignature")
+			if !thoughtSignatureResult.Exists() {
+				thoughtSignatureResult = partResult.Get("thought_signature")
+			}
 			inlineDataResult := partResult.Get("inlineData")
 			if !inlineDataResult.Exists() {
 				inlineDataResult = partResult.Get("inline_data")
 			}
 
-			// Handle thoughtSignature - this is encrypted reasoning content that should not be exposed to the client
-			if thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != "" {
-				// Skip thoughtSignature processing - it's internal encrypted data
+			hasThoughtSignature := thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != ""
+			hasContentPayload := partTextResult.Exists() || functionCallResult.Exists() || inlineDataResult.Exists()
+
+			// Ignore encrypted thoughtSignature but keep any actual content in the same part.
+			if hasThoughtSignature && !hasContentPayload {
 				continue
 			}
 

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

@@ -105,14 +105,19 @@ func ConvertCliResponseToOpenAI(_ context.Context, _ string, originalRequestRawJ
 			partTextResult := partResult.Get("text")
 			functionCallResult := partResult.Get("functionCall")
 			thoughtSignatureResult := partResult.Get("thoughtSignature")
+			if !thoughtSignatureResult.Exists() {
+				thoughtSignatureResult = partResult.Get("thought_signature")
+			}
 			inlineDataResult := partResult.Get("inlineData")
 			if !inlineDataResult.Exists() {
 				inlineDataResult = partResult.Get("inline_data")
 			}
 
-			// Handle thoughtSignature - this is encrypted reasoning content that should not be exposed to the client
-			if thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != "" {
-				// Skip thoughtSignature processing - it's internal encrypted data
+			hasThoughtSignature := thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != ""
+			hasContentPayload := partTextResult.Exists() || functionCallResult.Exists() || inlineDataResult.Exists()
+
+			// Ignore encrypted thoughtSignature but keep any actual content in the same part.
+			if hasThoughtSignature && !hasContentPayload {
 				continue
 			}
 

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

@@ -116,8 +116,11 @@ func ConvertGeminiResponseToOpenAI(_ context.Context, _ string, originalRequestR
 				thoughtSignatureResult = partResult.Get("thought_signature")
 			}
 
-			// Skip thoughtSignature parts (encrypted reasoning not exposed downstream).
-			if thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != "" {
+			hasThoughtSignature := thoughtSignatureResult.Exists() && thoughtSignatureResult.String() != ""
+			hasContentPayload := partTextResult.Exists() || functionCallResult.Exists() || inlineDataResult.Exists()
+
+			// Skip pure thoughtSignature parts but keep any actual payload in the same part.
+			if hasThoughtSignature && !hasContentPayload {
 				continue
 			}
 

internal/translator/gemini/openai/responses/gemini_openai-responses_request.go

@@ -186,7 +186,8 @@ func ConvertOpenAIResponsesRequestToGemini(modelName string, inputRawJSON []byte
 			case "function_call_output":
 				// Handle function call outputs - convert to function message with functionResponse
 				callID := item.Get("call_id").String()
-				output := item.Get("output").String()
+				// Use .Raw to preserve the JSON encoding (includes quotes for strings)
+				outputRaw := item.Get("output").Raw
 
 				functionContent := `{"role":"function","parts":[]}`
 				functionResponse := `{"functionResponse":{"name":"","response":{}}}`
@@ -209,10 +210,9 @@ func ConvertOpenAIResponsesRequestToGemini(modelName string, inputRawJSON []byte
 
 				functionResponse, _ = sjson.Set(functionResponse, "functionResponse.name", functionName)
 
-				// Parse output JSON string and set as response content
-				if output != "" {
-					outputResult := gjson.Parse(output)
-					functionResponse, _ = sjson.Set(functionResponse, "functionResponse.response.result", outputResult.Raw)
+				// Set the raw JSON output directly (preserves string encoding)
+				if outputRaw != "" && outputRaw != "null" {
+					functionResponse, _ = sjson.SetRaw(functionResponse, "functionResponse.response.result", outputRaw)
 				}
 
 				functionContent, _ = sjson.SetRaw(functionContent, "parts.-1", functionResponse)

sdk/api/handlers/gemini/gemini_handlers.go

@@ -71,7 +71,7 @@ func (h *GeminiAPIHandler) GeminiGetHandler(c *gin.Context) {
 	switch request.Action {
 	case "gemini-3-pro-preview":
 		c.JSON(http.StatusOK, gin.H{
-			"name":             "gemini-3-pro-preview",
+			"name":             "models/gemini-3-pro-preview",
 			"version":          "3",
 			"displayName":      "Gemini 3 Pro Preview",
 			"description":      "Gemini 3 Pro Preview",