fix: delete redundant fields in plugin output data (#469)

backend/application/workflow/workflow.go

@@ -2520,6 +2520,12 @@ func (w *ApplicationService) GetApiDetail(ctx context.Context, req *workflow.Get
 		return nil, err
 	}
 
+	for _, v := range outputVars {
+		if err := crossplugin.GetPluginService().UnwrapArrayItemFieldsInVariable(v); err != nil {
+			return nil, err
+		}
+	}
+
 	toolDetailInfo := &vo.ToolDetailInfo{
 		ApiDetailData: &workflow.ApiDetailData{
 			PluginID:            req.GetPluginID(),
@@ -3701,7 +3707,7 @@ func toVariable(p *workflow.APIParameter) (*vo.Variable, error) {
 	case workflow.ParameterType_Array:
 		v.Type = vo.VariableTypeList
 		if len(p.SubParameters) > 0 {
-			subVs := make([]any, 0)
+			subVs := make([]*vo.Variable, 0)
 			for _, ap := range p.SubParameters {
 				av, err := toVariable(ap)
 				if err != nil {

backend/crossdomain/workflow/plugin/plugin.go

@@ -201,7 +201,7 @@ func (t *pluginService) GetPluginToolsInfo(ctx context.Context, req *crossplugin
 		)
 		if toolExample != nil {
 			requestExample = toolExample.RequestExample
-			responseExample = toolExample.RequestExample
+			responseExample = toolExample.ResponseExample
 		}
 
 		response.ToolInfoList[tf.ID] = crossplugin.ToolInfo{
@@ -220,6 +220,63 @@ func (t *pluginService) GetPluginToolsInfo(ctx context.Context, req *crossplugin
 	return response, nil
 }
 
+func (t *pluginService) UnwrapArrayItemFieldsInVariable(v *vo.Variable) error {
+	if v == nil {
+		return nil
+	}
+
+	if v.Type == vo.VariableTypeObject {
+		subVars, ok := v.Schema.([]*vo.Variable)
+		if !ok {
+			return nil
+		}
+
+		newSubVars := make([]*vo.Variable, 0, len(subVars))
+		for _, subVar := range subVars {
+			if subVar.Name == "[Array Item]" {
+				if err := t.UnwrapArrayItemFieldsInVariable(subVar); err != nil {
+					return err
+				}
+				// If the array item is an object, append its children
+				if subVar.Type == vo.VariableTypeObject {
+					if innerSubVars, ok := subVar.Schema.([]*vo.Variable); ok {
+						newSubVars = append(newSubVars, innerSubVars...)
+					}
+				} else {
+					// If the array item is a primitive type, clear its name and append it
+					subVar.Name = ""
+					newSubVars = append(newSubVars, subVar)
+				}
+			} else {
+				// For other sub-variables, recursively unwrap and append
+				if err := t.UnwrapArrayItemFieldsInVariable(subVar); err != nil {
+					return err
+				}
+				newSubVars = append(newSubVars, subVar)
+			}
+		}
+		v.Schema = newSubVars
+
+	} else if v.Type == vo.VariableTypeList {
+		if v.Schema != nil {
+			subVar, ok := v.Schema.(*vo.Variable)
+			if !ok {
+				return nil
+			}
+
+			if err := t.UnwrapArrayItemFieldsInVariable(subVar); err != nil {
+				return err
+			}
+			// If the array item definition itself has "[Array Item]" name, clear it
+			if subVar.Name == "[Array Item]" {
+				subVar.Name = ""
+			}
+			v.Schema = subVar
+		}
+	}
+	return nil
+}
+
 func (t *pluginService) GetPluginInvokableTools(ctx context.Context, req *crossplugin.ToolsInvokableRequest) (
 	_ map[int64]crossplugin.InvokableTool, err error) {
 	defer func() {
@@ -327,7 +384,7 @@ func (t *pluginService) ExecutePlugin(ctx context.Context, input map[string]any,
 	}
 
 	var output map[string]any
-	err = sonic.UnmarshalString(r.RawResp, &output)
+	err = sonic.UnmarshalString(r.TrimmedResp, &output)
 	if err != nil {
 		return nil, vo.WrapError(errno.ErrSerializationDeserializationFail, err)
 	}

backend/crossdomain/workflow/plugin/plugin_test.go

@@ -0,0 +1,217 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package plugin
+
+import (
+	"testing"
+
+	"github.com/coze-dev/coze-studio/backend/domain/workflow/entity/vo"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPluginService_UnwrapArrayItemFieldsInVariable(t *testing.T) {
+	s := &pluginService{}
+	t.Run("unwraps a simple array item", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{
+					Name: "[Array Item]",
+					Type: vo.VariableTypeObject,
+					Schema: []*vo.Variable{
+						{Name: "field1", Type: vo.VariableTypeString},
+						{Name: "field2", Type: vo.VariableTypeInteger},
+					},
+				},
+			},
+		}
+
+		expected := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{Name: "field1", Type: vo.VariableTypeString},
+				{Name: "field2", Type: vo.VariableTypeInteger},
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("handles nested array items", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{
+					Name: "[Array Item]",
+					Type: vo.VariableTypeObject,
+					Schema: []*vo.Variable{
+						{Name: "field1", Type: vo.VariableTypeString},
+						{
+							Name: "[Array Item]",
+							Type: vo.VariableTypeObject,
+							Schema: []*vo.Variable{
+								{Name: "nestedField", Type: vo.VariableTypeBoolean},
+							},
+						},
+					},
+				},
+			},
+		}
+
+		expected := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{Name: "field1", Type: vo.VariableTypeString},
+				{Name: "nestedField", Type: vo.VariableTypeBoolean},
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("handles array item within a list", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "rootList",
+			Type: vo.VariableTypeList,
+			Schema: &vo.Variable{
+				Type: vo.VariableTypeObject,
+				Schema: []*vo.Variable{
+					{
+						Name: "[Array Item]",
+						Type: vo.VariableTypeObject,
+						Schema: []*vo.Variable{
+							{Name: "itemField", Type: vo.VariableTypeString},
+						},
+					},
+				},
+			},
+		}
+
+		expected := &vo.Variable{
+			Name: "rootList",
+			Type: vo.VariableTypeList,
+			Schema: &vo.Variable{
+				Type: vo.VariableTypeObject,
+				Schema: []*vo.Variable{
+					{Name: "itemField", Type: vo.VariableTypeString},
+				},
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("does nothing if no array item is present", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{Name: "field1", Type: vo.VariableTypeString},
+				{Name: "field2", Type: vo.VariableTypeInteger},
+			},
+		}
+
+		// Create a copy for comparison as the input will be modified in place.
+		expected := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{Name: "field1", Type: vo.VariableTypeString},
+				{Name: "field2", Type: vo.VariableTypeInteger},
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("handles primitive type array item in object", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{
+					Name: "[Array Item]",
+					Type: vo.VariableTypeString,
+				},
+				{
+					Name: "anotherField",
+					Type: vo.VariableTypeInteger,
+				},
+			},
+		}
+
+		expected := &vo.Variable{
+			Name: "root",
+			Type: vo.VariableTypeObject,
+			Schema: []*vo.Variable{
+				{
+					Name: "",
+					Type: vo.VariableTypeString,
+				},
+				{
+					Name: "anotherField",
+					Type: vo.VariableTypeInteger,
+				},
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("handles list of primitives", func(t *testing.T) {
+		input := &vo.Variable{
+			Name: "listOfStrings",
+			Type: vo.VariableTypeList,
+			Schema: &vo.Variable{
+				Name: "[Array Item]",
+				Type: vo.VariableTypeString,
+			},
+		}
+
+		expected := &vo.Variable{
+			Name: "listOfStrings",
+			Type: vo.VariableTypeList,
+			Schema: &vo.Variable{
+				Name: "",
+				Type: vo.VariableTypeString,
+			},
+		}
+
+		err := s.UnwrapArrayItemFieldsInVariable(input)
+		assert.NoError(t, err)
+		assert.Equal(t, expected, input)
+	})
+
+	t.Run("handles nil input", func(t *testing.T) {
+		err := s.UnwrapArrayItemFieldsInVariable(nil)
+		assert.NoError(t, err)
+	})
+}

backend/domain/workflow/crossdomain/plugin/plugin.go

@@ -30,6 +30,7 @@ import (
 //go:generate  mockgen -destination pluginmock/plugin_mock.go --package pluginmock -source plugin.go
 type Service interface {
 	GetPluginToolsInfo(ctx context.Context, req *ToolsInfoRequest) (*ToolsInfoResponse, error)
+	UnwrapArrayItemFieldsInVariable(v *vo.Variable) error
 	GetPluginInvokableTools(ctx context.Context, req *ToolsInvokableRequest) (map[int64]InvokableTool, error)
 	ExecutePlugin(ctx context.Context, input map[string]any, pe *Entity,
 		toolID int64, cfg ExecConfig) (map[string]any, error)

backend/domain/workflow/entity/message.go

@@ -78,7 +78,7 @@ type FunctionInfo struct {
 type FunctionCallInfo struct {
 	FunctionInfo
 	CallID    string         `json:"-"`
-	Arguments string `json:"arguments"`
+	Arguments map[string]any `json:"arguments"`
 }
 
 type ToolResponseInfo struct {

backend/domain/workflow/internal/execute/callback.go

@@ -27,6 +27,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/coze-dev/coze-studio/backend/pkg/sonic"
+
 	"github.com/cloudwego/eino/callbacks"
 	"github.com/cloudwego/eino/components/tool"
 	"github.com/cloudwego/eino/compose"
@@ -1271,13 +1273,21 @@ func (t *ToolHandler) OnStart(ctx context.Context, info *callbacks.RunInfo,
 		return ctx
 	}
 
+	var args map[string]any
+	if input.ArgumentsInJSON != "" {
+		if err := sonic.UnmarshalString(input.ArgumentsInJSON, &args); err != nil {
+			logs.Errorf("failed to unmarshal arguments: %v", err)
+			return ctx
+		}
+	}
+
 	t.ch <- &Event{
 		Type:    FunctionCall,
 		Context: GetExeCtx(ctx),
 		functionCall: &entity.FunctionCallInfo{
 			FunctionInfo: t.info,
 			CallID:       compose.GetToolCallID(ctx),
-			Arguments:    input.ArgumentsInJSON,
+			Arguments:    args,
 		},
 	}
 

backend/domain/workflow/internal/execute/event_handle.go

@@ -887,7 +887,12 @@ func getFCInfos(ctx context.Context, nodeKey vo.NodeKey) map[string]*fcInfo {
 }
 
 func (f *fcInfo) inputString() string {
+	if f.input == nil {
+		return ""
+	}
+
 	m, err := sonic.MarshalString(f.input)
+
 	if err != nil {
 		panic(err)
 	}
@@ -899,12 +904,5 @@ func (f *fcInfo) outputString() string {
 		return ""
 	}
 
-	m := map[string]any{
-		"data": f.output.Response, // TODO: traceID, code, message?
-	}
-	b, err := sonic.MarshalString(m)
-	if err != nil {
-		panic(err)
-	}
-	return b
+	return f.output.Response
 }