Fix ai agent node prompt and variables (#18275)

- prompt stored on workflow lvl so input variables can be resolved and
it can evolves with versions
- make ai agent node output available as variables

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-schema/workflow-schema.module.ts

@@ -1,17 +1,11 @@
 import { Module } from '@nestjs/common';
-import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
-import { AgentEntity } from 'src/engine/metadata-modules/ai/ai-agent/entities/agent.entity';
 import { WorkflowCommonModule } from 'src/modules/workflow/common/workflow-common.module';
 import { WorkflowSchemaWorkspaceService } from 'src/modules/workflow/workflow-builder/workflow-schema/workflow-schema.workspace-service';
 
 @Module({
-  imports: [
-    WorkflowCommonModule,
-    FeatureFlagModule,
-    TypeOrmModule.forFeature([AgentEntity]),
-  ],
+  imports: [WorkflowCommonModule, FeatureFlagModule],
   providers: [WorkflowSchemaWorkspaceService],
   exports: [WorkflowSchemaWorkspaceService],
 })

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-schema/workflow-schema.workspace-service.ts

@@ -1,5 +1,4 @@
 import { Injectable } from '@nestjs/common';
-import { InjectRepository } from '@nestjs/typeorm';
 
 import { isString } from '@sniptt/guards';
 import { isDefined, isValidVariable } from 'twenty-shared/utils';
@@ -12,11 +11,9 @@ import {
   SingleRecordAvailability,
   TRIGGER_STEP_ID,
 } from 'twenty-shared/workflow';
-import { Repository } from 'typeorm';
 
 import { type DatabaseEventAction } from 'src/engine/api/graphql/graphql-query-runner/enums/database-event-action';
 import { checkStringIsDatabaseEventAction } from 'src/engine/api/graphql/graphql-query-runner/utils/check-string-is-database-event-action';
-import { AgentEntity } from 'src/engine/metadata-modules/ai/ai-agent/entities/agent.entity';
 import { generateFakeValue } from 'src/engine/utils/generate-fake-value';
 import { WorkflowCommonWorkspaceService } from 'src/modules/workflow/common/workspace-services/workflow-common.workspace-service';
 import { DEFAULT_ITERATOR_CURRENT_ITEM } from 'src/modules/workflow/workflow-builder/workflow-schema/constants/default-iterator-current-item.const';
@@ -45,8 +42,6 @@ import {
 export class WorkflowSchemaWorkspaceService {
   constructor(
     private readonly workflowCommonWorkspaceService: WorkflowCommonWorkspaceService,
-    @InjectRepository(AgentEntity)
-    private readonly agentRepository: Repository<AgentEntity>,
   ) {}
 
   async computeStepOutputSchema({
@@ -128,37 +123,14 @@ export class WorkflowSchemaWorkspaceService {
         };
       }
       case WorkflowActionType.AI_AGENT: {
-        const agentId = step.settings.input.agentId;
-
-        if (!isDefined(agentId) || agentId === '') {
-          return {};
-        }
-
-        const agent = await this.agentRepository.findOne({
-          where: { id: agentId, workspaceId },
-        });
-
-        if (
-          !isDefined(agent) ||
-          agent.responseFormat?.type !== 'json' ||
-          !isDefined(agent.responseFormat.schema)
-        ) {
-          return {};
-        }
-
-        return Object.fromEntries(
-          Object.entries(agent.responseFormat.schema.properties).map(
-            ([key, field]) => [
-              key,
-              {
-                isLeaf: true,
-                type: field.type,
-                label: field.description || key,
-                value: null,
-              },
-            ],
-          ),
-        ) as OutputSchema;
+        return {
+          response: {
+            label: 'Response',
+            isLeaf: true,
+            type: 'string',
+            value: 'Response of the agent',
+          },
+        };
       }
       case WorkflowActionType.CODE: // StepOutput schema is computed on logicFunction draft execution
       default:
@@ -175,10 +147,7 @@ export class WorkflowSchemaWorkspaceService {
     workspaceId: string;
     workflowVersionId: string;
   }): Promise<WorkflowAction> {
-    const BACKEND_ENRICHED_TYPES = [
-      WorkflowActionType.AI_AGENT,
-      WorkflowActionType.ITERATOR,
-    ];
+    const BACKEND_ENRICHED_TYPES = [WorkflowActionType.ITERATOR];
 
     if (!BACKEND_ENRICHED_TYPES.includes(step.type)) {
       return step;