diff --git a/backend/internal/service/openai_codex_transform.go b/backend/internal/service/openai_codex_transform.go
index 14abde9b..65f7f5b4 100644
--- a/backend/internal/service/openai_codex_transform.go
+++ b/backend/internal/service/openai_codex_transform.go
@@ -658,12 +658,14 @@ func filterCodexInput(input []any, preserveReferences bool) []any {
 			}
 		}
 
+		if !isCodexToolCallItemType(typ) {
+			ensureCopy()
+			delete(newItem, "call_id")
+		}
+
 		if !preserveReferences {
 			ensureCopy()
 			delete(newItem, "id")
-			if !isCodexToolCallItemType(typ) {
-				delete(newItem, "call_id")
-			}
 		}
 
 		filtered = append(filtered, newItem)
@@ -672,10 +674,20 @@ func filterCodexInput(input []any, preserveReferences bool) []any {
 }
 
 func isCodexToolCallItemType(typ string) bool {
-	if typ == "" {
+	switch typ {
+	case "function_call",
+		"tool_call",
+		"local_shell_call",
+		"tool_search_call",
+		"custom_tool_call",
+		"function_call_output",
+		"mcp_tool_call_output",
+		"custom_tool_call_output",
+		"tool_search_output":
+		return true
+	default:
 		return false
 	}
-	return strings.HasSuffix(typ, "_call") || strings.HasSuffix(typ, "_call_output")
 }
 
 func normalizeCodexTools(reqBody map[string]any) bool {
diff --git a/backend/internal/service/openai_codex_transform_test.go b/backend/internal/service/openai_codex_transform_test.go
index 4fd16fdb..476f1ea9 100644
--- a/backend/internal/service/openai_codex_transform_test.go
+++ b/backend/internal/service/openai_codex_transform_test.go
@@ -92,6 +92,78 @@ func TestApplyCodexOAuthTransform_ToolContinuationNormalizesToolReferenceIDsOnly
 	require.Equal(t, "fc1", second["call_id"])
 }
 
+func TestApplyCodexOAuthTransform_ToolSearchOutputPreservesCallID(t *testing.T) {
+	reqBody := map[string]any{
+		"model": "gpt-5.2",
+		"input": []any{
+			map[string]any{"type": "tool_search_output", "call_id": "call_1", "output": "ok"},
+		},
+	}
+
+	applyCodexOAuthTransform(reqBody, false, false)
+
+	input, ok := reqBody["input"].([]any)
+	require.True(t, ok)
+	require.Len(t, input, 1)
+
+	first, ok := input[0].(map[string]any)
+	require.True(t, ok)
+	require.Equal(t, "tool_search_output", first["type"])
+	require.Equal(t, "fc1", first["call_id"])
+}
+
+func TestApplyCodexOAuthTransform_CustomAndMCPToolOutputsPreserveCallID(t *testing.T) {
+	reqBody := map[string]any{
+		"model": "gpt-5.2",
+		"input": []any{
+			map[string]any{"type": "custom_tool_call_output", "call_id": "call_custom", "output": "ok"},
+			map[string]any{"type": "mcp_tool_call_output", "call_id": "call_mcp", "output": "ok"},
+		},
+	}
+
+	applyCodexOAuthTransform(reqBody, false, false)
+
+	input, ok := reqBody["input"].([]any)
+	require.True(t, ok)
+	require.Len(t, input, 2)
+
+	first, ok := input[0].(map[string]any)
+	require.True(t, ok)
+	require.Equal(t, "fccustom", first["call_id"])
+
+	second, ok := input[1].(map[string]any)
+	require.True(t, ok)
+	require.Equal(t, "fcmcp", second["call_id"])
+}
+
+func TestApplyCodexOAuthTransform_ImageAndWebSearchCallsDoNotGainCallID(t *testing.T) {
+	reqBody := map[string]any{
+		"model": "gpt-5.2",
+		"input": []any{
+			map[string]any{"type": "image_generation_call", "id": "ig_123", "status": "completed"},
+			map[string]any{"type": "web_search_call", "call_id": "call_bad", "status": "completed"},
+		},
+		"tool_choice": "auto",
+	}
+
+	applyCodexOAuthTransform(reqBody, false, false)
+
+	input, ok := reqBody["input"].([]any)
+	require.True(t, ok)
+	require.Len(t, input, 2)
+
+	first, ok := input[0].(map[string]any)
+	require.True(t, ok)
+	require.Equal(t, "ig_123", first["id"])
+	_, hasCallID := first["call_id"]
+	require.False(t, hasCallID)
+
+	second, ok := input[1].(map[string]any)
+	require.True(t, ok)
+	_, hasCallID = second["call_id"]
+	require.False(t, hasCallID)
+}
+
 func TestApplyCodexOAuthTransform_ExplicitStoreFalsePreserved(t *testing.T) {
 	// 续链场景：显式 store=false 不再强制为 true，保持 false。
 
diff --git a/backend/internal/service/openai_tool_continuation.go b/backend/internal/service/openai_tool_continuation.go
index dea3c172..c0f98de4 100644
--- a/backend/internal/service/openai_tool_continuation.go
+++ b/backend/internal/service/openai_tool_continuation.go
@@ -21,7 +21,7 @@ type FunctionCallOutputValidation struct {
 }
 
 // NeedsToolContinuation 判定请求是否需要工具调用续链处理。
-// 满足以下任一信号即视为续链：previous_response_id、input 内包含 function_call_output/item_reference、
+// 满足以下任一信号即视为续链：previous_response_id、input 内包含工具输出/item_reference、
 // 或显式声明 tools/tool_choice。
 func NeedsToolContinuation(reqBody map[string]any) bool {
 	if reqBody == nil {
@@ -46,7 +46,7 @@ func NeedsToolContinuation(reqBody map[string]any) bool {
 			continue
 		}
 		itemType, _ := itemMap["type"].(string)
-		if itemType == "function_call_output" || itemType == "item_reference" {
+		if isCodexToolCallItemType(itemType) || itemType == "item_reference" {
 			return true
 		}
 	}
diff --git a/backend/internal/service/openai_tool_continuation_test.go b/backend/internal/service/openai_tool_continuation_test.go
index fe737ad6..3f415d9d 100644
--- a/backend/internal/service/openai_tool_continuation_test.go
+++ b/backend/internal/service/openai_tool_continuation_test.go
@@ -17,6 +17,9 @@ func TestNeedsToolContinuationSignals(t *testing.T) {
 		{name: "previous_response_id", body: map[string]any{"previous_response_id": "resp_1"}, want: true},
 		{name: "previous_response_id_blank", body: map[string]any{"previous_response_id": "  "}, want: false},
 		{name: "function_call_output", body: map[string]any{"input": []any{map[string]any{"type": "function_call_output"}}}, want: true},
+		{name: "tool_search_output", body: map[string]any{"input": []any{map[string]any{"type": "tool_search_output"}}}, want: true},
+		{name: "custom_tool_call_output", body: map[string]any{"input": []any{map[string]any{"type": "custom_tool_call_output"}}}, want: true},
+		{name: "mcp_tool_call_output", body: map[string]any{"input": []any{map[string]any{"type": "mcp_tool_call_output"}}}, want: true},
 		{name: "item_reference", body: map[string]any{"input": []any{map[string]any{"type": "item_reference"}}}, want: true},
 		{name: "tools", body: map[string]any{"tools": []any{map[string]any{"type": "function"}}}, want: true},
 		{name: "tools_empty", body: map[string]any{"tools": []any{}}, want: false},