Expose agent node usage (#24355)

api/core/workflow/nodes/agent/agent_node.py

 from core.model_manager import ModelInstance, ModelManager
 from core.model_runtime.entities.llm_entities import LLMUsage
 from core.model_runtime.entities.model_entities import AIModelEntity, ModelType
+from core.model_runtime.utils.encoders import jsonable_encoder
 from core.plugin.entities.request import InvokeCredentials
 from core.plugin.impl.exc import PluginDaemonClientSideError
 from core.plugin.impl.plugin import PluginInstaller
         yield RunCompletedEvent(
             run_result=NodeRunResult(
                 status=WorkflowNodeExecutionStatus.SUCCEEDED,
-                outputs={"text": text, "files": ArrayFileSegment(value=files), "json": json_output, **variables},
+                outputs={
+                    "text": text,
+                    "usage": jsonable_encoder(llm_usage),
+                    "files": ArrayFileSegment(value=files),
+                    "json": json_output,
+                    **variables,
+                },
                 metadata={
                     **agent_execution_metadata,
                     WorkflowNodeExecutionMetadataKey.TOOL_INFO: tool_info,

web/app/components/workflow/constants.ts

   BlockEnum.Agent,
 ]
 
+export const AGENT_OUTPUT_STRUCT: Var[] = [
+  {
+    variable: 'usage',
+    type: VarType.object,
+  },
+]
+
 export const LLM_OUTPUT_STRUCT: Var[] = [
   {
     variable: 'text',

web/app/components/workflow/nodes/_base/components/variable/utils.ts

 import type { Field as StructField } from '@/app/components/workflow/nodes/llm/types'
 
 import {
+  AGENT_OUTPUT_STRUCT,
   HTTP_REQUEST_OUTPUT_STRUCT,
   KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT,
   LLM_OUTPUT_STRUCT,
       res.vars = [
         ...outputs,
         ...TOOL_OUTPUT_STRUCT,
+        ...AGENT_OUTPUT_STRUCT,
       ]
       break
     }

web/app/components/workflow/nodes/agent/panel.tsx

           type='String'
           description={t(`${i18nPrefix}.outputVars.text`)}
         />
+        <VarItem
+          name='usage'
+          type='object'
+          description={t(`${i18nPrefix}.outputVars.usage`)}
+        />
         <VarItem
           name='files'
           type='Array[File]'

web/i18n/de-DE/workflow.ts

           transfer_method: 'Übertragungsmethode. Wert ist remote_url oder local_file',
         },
         text: 'Von Agenten generierte Inhalte',
+        usage: 'Nutzungsinformationen des Modells',
         json: 'Vom Agenten generiertes JSON',
       },
       checkList: {

web/i18n/en-US/workflow.ts

       },
       outputVars: {
         text: 'agent generated content',
+        usage: 'Model Usage Information',
         files: {
           title: 'agent generated files',
           type: 'Support type. Now only support image',

web/i18n/es-ES/workflow.ts

         },
         json: 'JSON generado por el agente',
         text: 'Contenido generado por el agente',
+        usage: 'Información de uso del modelo',
       },
       checkList: {
         strategyNotSelected: 'Estrategia no seleccionada',

web/i18n/fa-IR/workflow.ts

           type: 'نوع پشتیبانی. اکنون فقط از تصویر پشتیبانی می کند',
         },
         text: 'محتوای تولید شده توسط عامل',
+        usage: 'اطلاعات استفاده از مدل',
         json: 'عامل JSON را تولید کرد',
       },
       checkList: {

web/i18n/fr-FR/workflow.ts

         },
         json: 'JSON généré par l’agent',
         text: 'Contenu généré par l’agent',
+        usage: 'Informations sur l’utilisation du modèle',
       },
       checkList: {
         strategyNotSelected: 'Stratégie non sélectionnée',

web/i18n/hi-IN/workflow.ts

           title: 'एजेंट द्वारा उत्पन्न फ़ाइलें',
         },
         text: 'एजेंट द्वारा उत्पन्न सामग्री',
+        usage: 'मॉडल उपयोग जानकारी',
         json: 'एजेंट द्वारा उत्पन्न जेसन',
       },
       checkList: {

web/i18n/it-IT/workflow.ts

           upload_file_id: 'Carica l\'ID del file',
         },
         text: 'Contenuto generato dall\'agente',
+        usage: 'Informazioni sull\'utilizzo del modello',
         json: 'JSON generato dall\'agente',
       },
       checkList: {

web/i18n/ja-JP/workflow.ts

         },
         text: 'エージェント生成コンテンツ',
         json: 'エージェント生成の JSON',
+        usage: 'モデル使用量',
       },
       checkList: {
         strategyNotSelected: '戦略が選択されていません',

web/i18n/ko-KR/workflow.ts

         },
         json: '에이전트 생성 JSON',
         text: '상담원이 생성한 콘텐츠',
+        usage: '모델 사용 정보',
       },
       checkList: {
         strategyNotSelected: '전략이 선택되지 않음',

web/i18n/pl-PL/workflow.ts

         },
         json: 'Kod JSON wygenerowany przez agenta',
         text: 'Treści generowane przez agentów',
+        usage: 'Informacje o użyciu modelu',
       },
       checkList: {
         strategyNotSelected: 'Nie wybrano strategii',

web/i18n/pt-BR/workflow.ts

         },
         json: 'JSON gerado pelo agente',
         text: 'Conteúdo gerado pelo agente',
+        usage: 'Informações de uso do modelo',
       },
       checkList: {
         strategyNotSelected: 'Estratégia não selecionada',

web/i18n/ro-RO/workflow.ts

           url: 'Adresa URL a imaginii',
         },
         text: 'Conținut generat de agent',
+        usage: 'Informații de utilizare a modelului',
         json: 'JSON generat de agent',
       },
       checkList: {

web/i18n/ru-RU/workflow.ts

           title: 'Файлы, созданные агентом',
         },
         text: 'Контент, генерируемый агентом',
+        usage: 'Информация об использовании модели',
         json: 'JSON, сгенерированный агентом',
       },
       checkList: {

web/i18n/sl-SI/workflow.ts

         },
         json: 'agent generiran json',
         text: 'vsebina, ki jo je ustvaril agent',
+        usage: 'informacije o uporabi modela',
       },
       checkList: {
         strategyNotSelected: 'Strategija ni izbrana',

web/i18n/th-TH/workflow.ts

           type: 'ประเภทการสนับสนุน ตอนนี้รองรับเฉพาะรูปภาพ',
         },
         text: 'เนื้อหาที่สร้างตัวแทน',
+        usage: 'ข้อมูลการใช้งานรุ่น',
         json: 'ตัวแทนสร้าง JSON',
       },
       checkList: {

web/i18n/tr-TR/workflow.ts

           url: 'Resim url\'si',
         },
         text: 'Temsilci Tarafından Oluşturulan İçerik',
+        usage: 'Model Kullanım Bilgileri',
         json: 'Aracı tarafından oluşturulan JSON',
       },
       checkList: {

web/i18n/uk-UA/workflow.ts

           title: 'Файли, створені агентом',
         },
         text: 'Контент, створений агентом',
+        usage: 'Інформація про використання моделі',
         json: 'Агент згенерував JSON',
       },
       checkList: {

web/i18n/vi-VN/workflow.ts

         },
         json: 'JSON do tác nhân tạo',
         text: 'Nội dung do tác nhân tạo',
+        usage: 'Thông tin sử dụng mô hình',
       },
       checkList: {
         strategyNotSelected: 'Chiến lược không được chọn',

web/i18n/zh-Hans/workflow.ts

       },
       outputVars: {
         text: 'agent 生成的内容',
+        usage: '模型用量信息',
         files: {
           title: 'agent 生成的文件',
           type: '支持类型。现在只支持图片',

web/i18n/zh-Hant/workflow.ts

           upload_file_id: '上傳檔 ID',
         },
         text: '代理生成的內容',
+        usage: '模型用量信息',
         json: '代理生成的 JSON',
       },
       checkList: {