WIP - ai process builder codex attempt

backend/src/ai-assistant/ai-assistant.module.ts

@@ -10,5 +10,6 @@ import { MeilisearchModule } from '../search/meilisearch.module';
   imports: [ObjectModule, PageLayoutModule, TenantModule, MeilisearchModule],
   controllers: [AiAssistantController],
   providers: [AiAssistantService],
+  exports: [AiAssistantService],
 })
 export class AiAssistantModule {}

backend/src/ai-processes/__tests__/ai-processes.compiler.spec.ts

@@ -0,0 +1,25 @@
+import { compileProcessGraph, GraphValidationError } from '../ai-processes.compiler';
+import { demoRegisterNewPetProcess } from '../demo-process';
+
+describe('ai-processes compiler', () => {
+  it('throws when missing start node', () => {
+    const badGraph = {
+      ...demoRegisterNewPetProcess,
+      nodes: demoRegisterNewPetProcess.nodes.filter((n) => n.type !== 'Start'),
+    };
+
+    expect(() =>
+      compileProcessGraph(badGraph, { tenantId: 'default', version: 1 }),
+    ).toThrow(GraphValidationError);
+  });
+
+  it('compiles the demo process graph', () => {
+    const compiled = compileProcessGraph(demoRegisterNewPetProcess, {
+      tenantId: 'default',
+      version: 1,
+    });
+
+    expect(compiled.startNodeId).toBe('start');
+    expect(compiled.endNodeIds).toContain('end');
+  });
+});

backend/src/ai-processes/__tests__/ai-processes.runner.spec.ts

@@ -0,0 +1,40 @@
+import { compileProcessGraph } from '../ai-processes.compiler';
+import { demoRegisterNewPetProcess } from '../demo-process';
+import { runCompiledGraph } from '../ai-processes.runner';
+import { ToolRegistry } from '../tools/tool-registry';
+
+describe('ai-processes runner', () => {
+  it('runs the demo process until human input is required', async () => {
+    const compiled = compileProcessGraph(demoRegisterNewPetProcess, {
+      tenantId: 'default',
+      version: 1,
+    });
+
+    const result = await runCompiledGraph({
+      compiledGraph: compiled,
+      input: {
+        accountName: 'Acme Inc',
+        firstName: 'Jamie',
+        lastName: 'Doe',
+      },
+      toolRegistry: new ToolRegistry(),
+      toolContext: { tenantId: 'default', userId: 'user-1' },
+      llmDecision: async (node, state) => {
+        if (node.id === 'decide_account') {
+          return { accountAction: 'find', accountName: state.accountName };
+        }
+        if (node.id === 'decide_contact') {
+          return {
+            contactAction: 'find',
+            firstName: state.firstName,
+            lastName: state.lastName,
+          };
+        }
+        return {};
+      },
+    });
+
+    expect(result.status).toBe('waiting');
+    expect(result.currentNodeId).toBe('need_pet');
+  });
+});

backend/src/ai-processes/ai-processes.compiler.ts

@@ -0,0 +1,183 @@
+import { apply as applyJsonLogic } from 'json-logic-js';
+import { createAjv } from './ai-processes.schemas';
+import {
+  CompiledGraph,
+  ProcessGraphDefinition,
+  ProcessGraphEdge,
+  ProcessGraphNode,
+} from './ai-processes.types';
+import { ToolRegistry } from './tools/tool-registry';
+
+export class GraphValidationError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'GraphValidationError';
+  }
+}
+
+export interface CompileOptions {
+  tenantId: string;
+  version: number;
+}
+
+export const validateGraphDefinition = (
+  graph: ProcessGraphDefinition,
+  tenantId: string,
+) => {
+  const ajv = createAjv();
+  const validate = ajv.getSchema<ProcessGraphDefinition>('processGraph');
+  if (!validate) {
+    throw new GraphValidationError('Graph schema is not registered.');
+  }
+  const valid = validate(graph);
+  if (!valid) {
+    throw new GraphValidationError(
+      `Graph schema validation failed: ${ajv.errorsText(validate.errors)}`,
+    );
+  }
+
+  const startNodes = graph.nodes.filter((node) => node.type === 'Start');
+  const endNodes = graph.nodes.filter((node) => node.type === 'End');
+
+  if (startNodes.length !== 1) {
+    throw new GraphValidationError('Graph must contain exactly one Start node.');
+  }
+  if (endNodes.length < 1) {
+    throw new GraphValidationError('Graph must contain at least one End node.');
+  }
+
+  const nodeIds = new Set(graph.nodes.map((node) => node.id));
+  graph.edges.forEach((edge) => {
+    if (!nodeIds.has(edge.source) || !nodeIds.has(edge.target)) {
+      throw new GraphValidationError(`Edge ${edge.id} references unknown nodes.`);
+    }
+  });
+
+  const adjacency = buildAdjacency(graph.edges);
+  const reachable = new Set<string>();
+  const queue = [startNodes[0].id];
+
+  while (queue.length) {
+    const current = queue.shift();
+    if (!current || reachable.has(current)) continue;
+    reachable.add(current);
+    (adjacency[current] || []).forEach((neighbor) => queue.push(neighbor));
+  }
+
+  graph.nodes.forEach((node) => {
+    if (!reachable.has(node.id)) {
+      throw new GraphValidationError(`Node ${node.id} is not reachable.`);
+    }
+  });
+
+  if (!graph.allowCycles && hasCycle(graph.nodes, graph.edges)) {
+    throw new GraphValidationError('Graph contains cycles but allowCycles=false.');
+  }
+
+  const toolRegistry = new ToolRegistry();
+  graph.nodes.forEach((node) => {
+    if (node.type === 'ToolNode') {
+      const toolName = (node.data as { toolName?: string }).toolName;
+      if (!toolName || !toolRegistry.isToolAllowed(tenantId, toolName)) {
+        throw new GraphValidationError(
+          `Tool ${toolName ?? 'unknown'} is not allowlisted for tenant.`,
+        );
+      }
+    }
+    if (node.type === 'LLMDecisionNode') {
+      const data = node.data as {
+        promptTemplate?: string;
+        inputKeys?: string[];
+        outputSchema?: Record<string, unknown>;
+        model?: { name?: string; temperature?: number };
+      };
+      if (!data.promptTemplate || !data.outputSchema || !data.model?.name) {
+        throw new GraphValidationError(
+          `LLMDecisionNode ${node.id} missing required configuration.`,
+        );
+      }
+    }
+    if (node.type === 'HumanInputNode') {
+      const data = node.data as {
+        requiredFieldsSchema?: Record<string, unknown>;
+        promptToUser?: string;
+      };
+      if (!data.requiredFieldsSchema || !data.promptToUser) {
+        throw new GraphValidationError(
+          `HumanInputNode ${node.id} missing required configuration.`,
+        );
+      }
+    }
+  });
+
+  graph.edges.forEach((edge) => {
+    if (edge.condition) {
+      try {
+        applyJsonLogic(edge.condition, {});
+      } catch (error) {
+        throw new GraphValidationError(
+          `Edge ${edge.id} has invalid json-logic condition.`,
+        );
+      }
+    }
+  });
+};
+
+export const compileProcessGraph = (
+  graph: ProcessGraphDefinition,
+  options: CompileOptions,
+): CompiledGraph => {
+  validateGraphDefinition(graph, options.tenantId);
+
+  const startNodeId = graph.nodes.find((node) => node.type === 'Start')?.id;
+  if (!startNodeId) {
+    throw new GraphValidationError('Start node missing after validation.');
+  }
+
+  const endNodeIds = graph.nodes
+    .filter((node) => node.type === 'End')
+    .map((node) => node.id);
+
+  return {
+    graphId: graph.id,
+    version: options.version,
+    nodes: graph.nodes,
+    edges: graph.edges,
+    startNodeId,
+    endNodeIds,
+    adjacency: buildAdjacency(graph.edges),
+    allowCycles: graph.allowCycles,
+    maxIterations: graph.maxIterations,
+  };
+};
+
+const buildAdjacency = (edges: ProcessGraphEdge[]) => {
+  return edges.reduce<Record<string, string[]>>((acc, edge) => {
+    if (!acc[edge.source]) {
+      acc[edge.source] = [];
+    }
+    acc[edge.source].push(edge.target);
+    return acc;
+  }, {});
+};
+
+const hasCycle = (nodes: ProcessGraphNode[], edges: ProcessGraphEdge[]) => {
+  const adjacency = buildAdjacency(edges);
+  const visited = new Set<string>();
+  const stack = new Set<string>();
+
+  const visit = (nodeId: string): boolean => {
+    if (stack.has(nodeId)) return true;
+    if (visited.has(nodeId)) return false;
+    visited.add(nodeId);
+    stack.add(nodeId);
+    const neighbors = adjacency[nodeId] || [];
+    for (const neighbor of neighbors) {
+      if (visit(neighbor)) return true;
+    }
+    stack.delete(nodeId);
+    return false;
+  };
+
+  return nodes.some((node) => visit(node.id));
+};

backend/src/ai-processes/ai-processes.controller.ts

@@ -0,0 +1,142 @@
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Post,
+  Put,
+  Query,
+  Sse,
+  UseGuards,
+} from '@nestjs/common';
+import { JwtAuthGuard } from '../auth/jwt-auth.guard';
+import { CurrentUser } from '../auth/current-user.decorator';
+import { TenantId } from '../tenant/tenant.decorator';
+import { AiProcessesService } from './ai-processes.service';
+import { AiProcessesStreamService } from './ai-processes.stream.service';
+import { AiProcessesOrchestratorService } from './ai-processes.orchestrator.service';
+import { CreateAiProcessDto, UpdateAiProcessDto } from './dto/ai-process.dto';
+import { CreateAiRunDto, ResumeAiRunDto } from './dto/ai-run.dto';
+import { CreateChatSessionDto, SendChatMessageDto } from './dto/ai-chat.dto';
+
+@Controller('tenants/:tenantId')
+@UseGuards(JwtAuthGuard)
+export class AiProcessesController {
+  constructor(
+    private readonly processesService: AiProcessesService,
+    private readonly streamService: AiProcessesStreamService,
+    private readonly orchestratorService: AiProcessesOrchestratorService,
+  ) {}
+
+  @Get('ai-processes')
+  async listProcesses(@TenantId() tenantId: string) {
+    return this.processesService.listProcesses(tenantId);
+  }
+
+  @Post('ai-processes')
+  async createProcess(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Body() payload: CreateAiProcessDto,
+  ) {
+    return this.processesService.createProcess(
+      tenantId,
+      user.userId,
+      payload.name,
+      payload.description,
+      payload.graph,
+    );
+  }
+
+  @Put('ai-processes/:processId')
+  async updateProcess(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Param('processId') processId: string,
+    @Body() payload: UpdateAiProcessDto,
+  ) {
+    return this.processesService.createProcessVersion(
+      tenantId,
+      user.userId,
+      processId,
+      payload.graph,
+    );
+  }
+
+  @Get('ai-processes/:processId/versions')
+  async listVersions(
+    @TenantId() tenantId: string,
+    @Param('processId') processId: string,
+  ) {
+    return this.processesService.listProcessVersions(tenantId, processId);
+  }
+
+  @Post('ai-processes/:processId/runs')
+  async createRun(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Param('processId') processId: string,
+    @Body() payload: CreateAiRunDto,
+  ) {
+    return this.processesService.createRun(
+      tenantId,
+      user.userId,
+      processId,
+      payload.input,
+      payload.sessionId,
+      payload.sessionId
+        ? (event) => this.streamService.emit(payload.sessionId as string, event)
+        : undefined,
+    );
+  }
+
+  @Post('ai-runs/:runId/resume')
+  async resumeRun(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Param('runId') runId: string,
+    @Body() payload: ResumeAiRunDto,
+  ) {
+    return this.processesService.resumeRun(
+      tenantId,
+      user.userId,
+      runId,
+      payload.input,
+      payload.sessionId,
+      payload.sessionId
+        ? (event) => this.streamService.emit(payload.sessionId as string, event)
+        : undefined,
+    );
+  }
+
+  @Post('ai-chat/sessions')
+  async createSession(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Body() _payload: CreateChatSessionDto,
+  ) {
+    return this.orchestratorService.createSession(tenantId, user.userId);
+  }
+
+  @Post('ai-chat/messages')
+  async sendChatMessage(
+    @TenantId() tenantId: string,
+    @CurrentUser() user: any,
+    @Body() payload: SendChatMessageDto,
+  ) {
+    return this.orchestratorService.sendMessage(
+      tenantId,
+      user.userId,
+      payload.message,
+      payload.sessionId,
+      payload.processId,
+      payload.history,
+      payload.context,
+    );
+  }
+
+  @Sse('ai-chat/stream')
+  streamChat(@Query('sessionId') sessionId: string) {
+    return this.streamService.getStream(sessionId);
+  }
+}

backend/src/ai-processes/ai-processes.module.ts

@@ -0,0 +1,19 @@
+import { Module } from '@nestjs/common';
+import { TenantModule } from '../tenant/tenant.module';
+import { AiAssistantModule } from '../ai-assistant/ai-assistant.module';
+import { AiProcessesController } from './ai-processes.controller';
+import { AiProcessesService } from './ai-processes.service';
+import { AiProcessesStreamService } from './ai-processes.stream.service';
+import { AiProcessesOrchestratorService } from './ai-processes.orchestrator.service';
+
+@Module({
+  imports: [TenantModule, AiAssistantModule],
+  controllers: [AiProcessesController],
+  providers: [
+    AiProcessesService,
+    AiProcessesStreamService,
+    AiProcessesOrchestratorService,
+  ],
+  exports: [AiProcessesService],
+})
+export class AiProcessesModule {}

backend/src/ai-processes/ai-processes.orchestrator.service.ts

@@ -0,0 +1,120 @@
+import { Injectable } from '@nestjs/common';
+import { Knex } from 'knex';
+import { AiProcessesService } from './ai-processes.service';
+import { AiProcessesStreamService } from './ai-processes.stream.service';
+import { AiAssistantService } from '../ai-assistant/ai-assistant.service';
+import { TenantDatabaseService } from '../tenant/tenant-database.service';
+import { AiChatMessage, AiChatSession } from '../models/ai-chat.model';
+
+@Injectable()
+export class AiProcessesOrchestratorService {
+  constructor(
+    private readonly processesService: AiProcessesService,
+    private readonly streamService: AiProcessesStreamService,
+    private readonly tenantDbService: TenantDatabaseService,
+    private readonly aiAssistantService: AiAssistantService,
+  ) {}
+
+  private async getTenantContext(tenantId: string) {
+    const resolvedTenantId = await this.tenantDbService.resolveTenantId(tenantId);
+    const knex = await this.tenantDbService.getTenantKnexById(resolvedTenantId);
+    return { knex, tenantId: resolvedTenantId };
+  }
+
+  private async createSessionWithContext(
+    knex: Knex,
+    tenantId: string,
+    userId: string,
+  ) {
+    return AiChatSession.query(knex).insert({
+      tenantId,
+      userId,
+    });
+  }
+
+  async createSession(tenantId: string, userId: string) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    return this.createSessionWithContext(knex, resolvedTenantId, userId);
+  }
+
+  async sendMessage(
+    tenantId: string,
+    userId: string,
+    message: string,
+    sessionId?: string,
+    processId?: string,
+    history?: { role: string; text: string }[],
+    context?: Record<string, unknown>,
+  ) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+
+    const session = sessionId
+      ? await AiChatSession.query(knex).findById(sessionId)
+      : await this.createSessionWithContext(knex, resolvedTenantId, userId);
+
+    if (!session || session.tenantId !== resolvedTenantId) {
+      throw new Error('Chat session not found.');
+    }
+
+    await AiChatMessage.query(knex).insert({
+      sessionId: session.id,
+      role: 'user',
+      content: message,
+    });
+
+    this.streamService.emit(session.id, { type: 'agent_started' });
+
+    const processes = await this.processesService.listProcesses(resolvedTenantId);
+    this.streamService.emit(session.id, {
+      type: 'processes_listed',
+      data: { count: processes.length },
+    });
+
+    if (!processes.length) {
+      const response = await this.aiAssistantService.handleChat(
+        resolvedTenantId,
+        userId,
+        message,
+        history ?? [],
+        context ?? {},
+      );
+      this.streamService.emit(session.id, {
+        type: 'final',
+        data: { reply: response.reply, action: response.action },
+      });
+      return {
+        sessionId: session.id,
+        reply: response.reply,
+        action: response.action,
+        record: response.record,
+      };
+    }
+
+    const selectedProcess = processId
+      ? processes.find((proc) => proc.id === processId)
+      : processes[0];
+
+    if (!selectedProcess) {
+      throw new Error('Process not found.');
+    }
+
+    this.streamService.emit(session.id, {
+      type: 'process_selected',
+      processId: selectedProcess.id,
+      version: selectedProcess.latestVersion,
+    });
+
+    const { run, result } = await this.processesService.createRun(
+      resolvedTenantId,
+      userId,
+      selectedProcess.id,
+      { message },
+      session.id,
+      (payload) => this.streamService.emit(session.id, payload),
+    );
+
+    return { sessionId: session.id, runId: run.id, status: result.status };
+  }
+}

backend/src/ai-processes/ai-processes.runner.ts

@@ -0,0 +1,208 @@
+import { apply as applyJsonLogic } from 'json-logic-js';
+import Ajv from 'ajv';
+import { ToolRegistry, ToolContext } from './tools/tool-registry';
+import {
+  AiProcessEventPayload,
+  CompiledGraph,
+  ProcessGraphNode,
+} from './ai-processes.types';
+
+export interface RunOptions {
+  compiledGraph: CompiledGraph;
+  input: Record<string, unknown>;
+  toolRegistry: ToolRegistry;
+  toolContext: ToolContext;
+  onEvent?: (event: AiProcessEventPayload) => void;
+  llmDecision: (
+    node: ProcessGraphNode,
+    state: Record<string, unknown>,
+  ) => Promise<Record<string, unknown>>;
+}
+
+export interface RunResult {
+  status: 'running' | 'waiting' | 'completed' | 'error';
+  state: Record<string, unknown>;
+  currentNodeId?: string;
+  output?: Record<string, unknown>;
+  error?: Record<string, unknown>;
+}
+
+export const runCompiledGraph = async (
+  options: RunOptions,
+  startNodeId?: string,
+): Promise<RunResult> => {
+  const {
+    compiledGraph,
+    input,
+    toolRegistry,
+    toolContext,
+    onEvent,
+    llmDecision,
+  } = options;
+
+  const state: Record<string, unknown> = { ...input };
+  let currentNodeId = startNodeId ?? compiledGraph.startNodeId;
+  let iterations = 0;
+  const maxIterations = compiledGraph.maxIterations ?? 50;
+
+  const emit = (payload: AiProcessEventPayload) => {
+    if (onEvent) {
+      onEvent(payload);
+    }
+  };
+
+  while (currentNodeId) {
+    if (
+      compiledGraph.nodes.length > 0 &&
+      compiledGraph.endNodeIds.includes(currentNodeId)
+    ) {
+      emit({ type: 'node_started', nodeId: currentNodeId });
+      emit({ type: 'node_completed', nodeId: currentNodeId });
+      emit({ type: 'final', data: { output: state } });
+      return { status: 'completed', state, output: state };
+    }
+
+    const node = compiledGraph.nodes.find((item) => item.id === currentNodeId);
+    if (!node) {
+      return {
+        status: 'error',
+        state,
+        error: { message: `Node ${currentNodeId} not found.` },
+      };
+    }
+
+    emit({ type: 'node_started', nodeId: node.id });
+
+    if (node.type === 'LLMDecisionNode') {
+      const output = await llmDecision(node, state);
+      validateNodeOutput(node, output);
+      Object.assign(state, output);
+    }
+
+    if (node.type === 'ToolNode') {
+      const toolName = (node.data as { toolName: string }).toolName;
+      emit({ type: 'tool_called', nodeId: node.id, toolName });
+      const tool = toolRegistry.getTool(toolName);
+      const argsTemplate = (node.data as { argsTemplate: Record<string, unknown> })
+        .argsTemplate;
+      const resolvedArgs = resolveTemplate(argsTemplate, state);
+      const toolResult = await tool(toolContext, {
+        ...resolvedArgs,
+        state,
+      });
+      const outputMapping = (node.data as { outputMapping: Record<string, string> })
+        .outputMapping;
+      Object.entries(outputMapping).forEach(([key, path]) => {
+        state[path] = toolResult[key];
+      });
+    }
+
+    if (node.type === 'HumanInputNode') {
+      const data = node.data as {
+        requiredFieldsSchema: Record<string, unknown>;
+        promptToUser: string;
+      };
+      emit({
+        type: 'need_input',
+        nodeId: node.id,
+        data: {
+          requiredFieldsSchema: data.requiredFieldsSchema,
+          promptToUser: data.promptToUser,
+        },
+      });
+      return { status: 'waiting', state, currentNodeId: node.id };
+    }
+
+    emit({ type: 'node_completed', nodeId: node.id });
+
+    const nextTargets = compiledGraph.edges.filter(
+      (edge) => edge.source === node.id,
+    );
+
+    if (nextTargets.length === 0) {
+      return {
+        status: 'error',
+        state,
+        error: { message: `No outgoing edges for node ${node.id}.` },
+      };
+    }
+
+    const selectedEdge = selectEdge(nextTargets, state);
+    if (!selectedEdge) {
+      return {
+        status: 'error',
+        state,
+        error: { message: `No edge conditions matched for node ${node.id}.` },
+      };
+    }
+
+    currentNodeId = selectedEdge.target;
+    iterations += 1;
+
+    if (!compiledGraph.allowCycles && iterations > compiledGraph.nodes.length) {
+      return {
+        status: 'error',
+        state,
+        error: { message: 'Cycle detected during execution.' },
+      };
+    }
+
+    if (compiledGraph.allowCycles && iterations > maxIterations) {
+      return {
+        status: 'error',
+        state,
+        error: { message: 'Max iterations exceeded.' },
+      };
+    }
+  }
+
+  return { status: 'completed', state, output: state };
+};
+
+const resolveTemplate = (
+  template: Record<string, unknown>,
+  state: Record<string, unknown>,
+) => {
+  return Object.entries(template).reduce<Record<string, unknown>>(
+    (acc, [key, value]) => {
+      if (typeof value === 'string' && value.startsWith('{{state.')) {
+        const path = value.replace('{{state.', '').replace('}}', '');
+        acc[key] = state[path];
+      } else {
+        acc[key] = value;
+      }
+      return acc;
+    },
+    {},
+  );
+};
+
+const selectEdge = (
+  edges: { condition?: Record<string, unknown>; target: string }[],
+  state: Record<string, unknown>,
+) => {
+  if (edges.length === 1) return edges[0];
+
+  return edges.find((edge) => {
+    if (!edge.condition) return true;
+    try {
+      return Boolean(applyJsonLogic(edge.condition, state));
+    } catch (error) {
+      return false;
+    }
+  });
+};
+
+const validateNodeOutput = (
+  node: ProcessGraphNode,
+  output: Record<string, unknown>,
+) => {
+  const schema = (node.data as { outputSchema?: Record<string, unknown> })
+    .outputSchema;
+  if (!schema) return;
+  const ajv = new Ajv({ allErrors: true, strict: false });
+  const validate = ajv.compile(schema);
+  if (!validate(output)) {
+    throw new Error(`LLM output invalid for node ${node.id}.`);
+  }
+};

backend/src/ai-processes/ai-processes.schemas.ts

@@ -0,0 +1,79 @@
+import Ajv, { JSONSchemaType } from 'ajv';
+import addFormats from 'ajv-formats';
+import {
+  AiNodeType,
+  ProcessGraphDefinition,
+  ProcessGraphEdge,
+  ProcessGraphNode,
+} from './ai-processes.types';
+
+const nodeTypes: AiNodeType[] = [
+  'Start',
+  'LLMDecisionNode',
+  'ToolNode',
+  'HumanInputNode',
+  'End',
+];
+
+export const graphSchema: JSONSchemaType<ProcessGraphDefinition> = {
+  type: 'object',
+  required: ['id', 'name', 'nodes', 'edges'],
+  additionalProperties: false,
+  properties: {
+    id: { type: 'string' },
+    name: { type: 'string' },
+    description: { type: 'string', nullable: true },
+    allowCycles: { type: 'boolean', nullable: true },
+    maxIterations: { type: 'number', nullable: true },
+    nodes: {
+      type: 'array',
+      items: { $ref: '#/definitions/processGraphNode' },
+      minItems: 1,
+    },
+    edges: {
+      type: 'array',
+      items: { $ref: '#/definitions/processGraphEdge' },
+      minItems: 0,
+    },
+  },
+  definitions: {
+    processGraphEdge: {
+      type: 'object',
+      required: ['id', 'source', 'target'],
+      additionalProperties: false,
+      properties: {
+        id: { type: 'string' },
+        source: { type: 'string' },
+        target: { type: 'string' },
+        condition: { type: 'object', nullable: true },
+      },
+    } as JSONSchemaType<ProcessGraphEdge>,
+    processGraphNode: {
+      type: 'object',
+      required: ['id', 'type', 'data'],
+      additionalProperties: false,
+      properties: {
+        id: { type: 'string' },
+        type: { type: 'string', enum: nodeTypes },
+        position: {
+          type: 'object',
+          nullable: true,
+          required: ['x', 'y'],
+          additionalProperties: false,
+          properties: {
+            x: { type: 'number' },
+            y: { type: 'number' },
+          },
+        },
+        data: { type: 'object' },
+      },
+    } as JSONSchemaType<ProcessGraphNode>,
+  },
+};
+
+export const createAjv = () => {
+  const ajv = new Ajv({ allErrors: true, strict: false });
+  addFormats(ajv);
+  ajv.addSchema(graphSchema, 'processGraph');
+  return ajv;
+};

backend/src/ai-processes/ai-processes.service.ts

@@ -0,0 +1,295 @@
+import { Injectable } from '@nestjs/common';
+import { randomUUID } from 'crypto';
+import { Knex } from 'knex';
+import { TenantDatabaseService } from '../tenant/tenant-database.service';
+import {
+  AiAuditEvent,
+  AiProcess,
+  AiProcessRun,
+  AiProcessVersion,
+} from '../models/ai-process.model';
+import { compileProcessGraph } from './ai-processes.compiler';
+import { runCompiledGraph } from './ai-processes.runner';
+import {
+  AiProcessEventPayload,
+  CompiledGraph,
+  ProcessGraphDefinition,
+} from './ai-processes.types';
+import { ToolRegistry } from './tools/tool-registry';
+
+@Injectable()
+export class AiProcessesService {
+  constructor(private readonly tenantDbService: TenantDatabaseService) {}
+
+  private async getTenantContext(tenantId: string) {
+    const resolvedTenantId = await this.tenantDbService.resolveTenantId(tenantId);
+    const knex = await this.tenantDbService.getTenantKnexById(resolvedTenantId);
+    return { knex, tenantId: resolvedTenantId };
+  }
+
+  async listProcesses(tenantId: string) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    return AiProcess.query(knex)
+      .where('tenantId', resolvedTenantId)
+      .withGraphFetched('versions')
+      .orderBy('createdAt', 'desc');
+  }
+
+  async getProcess(tenantId: string, processId: string) {
+    const { knex } = await this.getTenantContext(tenantId);
+    return AiProcess.query(knex)
+      .findById(processId)
+      .withGraphFetched('versions');
+  }
+
+  async createProcess(
+    tenantId: string,
+    userId: string,
+    name: string,
+    description: string | undefined,
+    graph: ProcessGraphDefinition,
+  ) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    const compiled = compileProcessGraph(graph, {
+      tenantId: resolvedTenantId,
+      version: 1,
+    });
+
+    return knex.transaction(async (trx) => {
+      const processId = randomUUID();
+
+      await AiProcess.query(trx).insert({
+        id: processId,
+        tenantId: resolvedTenantId,
+        name,
+        description,
+        latestVersion: 1,
+        createdBy: userId,
+      });
+
+      await AiProcessVersion.query(trx).insert({
+        id: randomUUID(),
+        tenantId: resolvedTenantId,
+        processId,
+        version: 1,
+        graphJson: graph,
+        compiledJson: compiled,
+        createdBy: userId,
+      });
+
+      return AiProcess.query(trx)
+        .findById(processId)
+        .withGraphFetched('versions');
+    });
+  }
+
+  async createProcessVersion(
+    tenantId: string,
+    userId: string,
+    processId: string,
+    graph: ProcessGraphDefinition,
+  ) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+
+    const process = await AiProcess.query(knex).findById(processId);
+    if (!process || process.tenantId !== resolvedTenantId) {
+      throw new Error('Process not found.');
+    }
+
+    const nextVersion = process.latestVersion + 1;
+    const compiled = compileProcessGraph(graph, {
+      tenantId: resolvedTenantId,
+      version: nextVersion,
+    });
+
+    return knex.transaction(async (trx) => {
+      await AiProcess.query(trx)
+        .findById(processId)
+        .patch({ latestVersion: nextVersion });
+
+      const versionId = randomUUID();
+      await AiProcessVersion.query(trx).insert({
+        id: versionId,
+        tenantId: resolvedTenantId,
+        processId,
+        version: nextVersion,
+        graphJson: graph,
+        compiledJson: compiled,
+        createdBy: userId,
+      });
+
+      return AiProcessVersion.query(trx).findById(versionId);
+    });
+  }
+
+  async listProcessVersions(tenantId: string, processId: string) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    return AiProcessVersion.query(knex)
+      .where({ processId, tenantId: resolvedTenantId })
+      .orderBy('version', 'desc');
+  }
+
+  async createRun(
+    tenantId: string,
+    userId: string,
+    processId: string,
+    input: Record<string, unknown>,
+    sessionId: string | undefined,
+    emitEvent?: (payload: AiProcessEventPayload) => void,
+  ) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    const process = await AiProcess.query(knex).findById(processId);
+    if (!process || process.tenantId !== resolvedTenantId) {
+      throw new Error('Process not found.');
+    }
+
+    const versionRecord = await AiProcessVersion.query(knex).findOne({
+      processId,
+      version: process.latestVersion,
+    });
+
+    if (!versionRecord) {
+      throw new Error('Process version not found.');
+    }
+
+    const runId = randomUUID();
+    await AiProcessRun.query(knex).insert({
+      id: runId,
+      tenantId: resolvedTenantId,
+      processId,
+      version: versionRecord.version,
+      status: 'running',
+      inputJson: input,
+      stateJson: input,
+      currentNodeId: null,
+    });
+
+    const run = await AiProcessRun.query(knex).findById(runId);
+    if (!run) {
+      throw new Error('Run not created.');
+    }
+
+    const compiled = versionRecord.compiledJson as CompiledGraph;
+    const toolRegistry = new ToolRegistry();
+    const emitAndAudit = (event: AiProcessEventPayload) => {
+      emitEvent?.(event);
+      void AiAuditEvent.query(knex).insert({
+        id: randomUUID(),
+        tenantId: resolvedTenantId,
+        runId,
+        eventType: event.type,
+        payloadJson: event,
+      });
+    };
+    const result = await runCompiledGraph(
+      {
+        compiledGraph: compiled,
+        input,
+        toolRegistry,
+        toolContext: { tenantId: resolvedTenantId, userId },
+        onEvent: (event) => emitAndAudit({ ...event, runId, sessionId }),
+        llmDecision: async (node, state) =>
+          this.mockDecision(node.id, state),
+      },
+      run.currentNodeId ?? undefined,
+    );
+
+    const updatedRun = await this.persistRunResult(runId, result, knex);
+
+    return { run: updatedRun, result };
+  }
+
+  async resumeRun(
+    tenantId: string,
+    userId: string,
+    runId: string,
+    input: Record<string, unknown>,
+    sessionId: string | undefined,
+    emitEvent?: (payload: AiProcessEventPayload) => void,
+  ) {
+    const { knex, tenantId: resolvedTenantId } =
+      await this.getTenantContext(tenantId);
+    const run = await AiProcessRun.query(knex).findById(runId);
+    if (!run || run.tenantId !== resolvedTenantId) {
+      throw new Error('Run not found.');
+    }
+    const versionRecord = await AiProcessVersion.query(knex).findOne({
+      processId: run.processId,
+      version: run.version,
+    });
+    if (!versionRecord) {
+      throw new Error('Process version not found.');
+    }
+
+    const compiled = versionRecord.compiledJson as CompiledGraph;
+    const toolRegistry = new ToolRegistry();
+    const mergedState = { ...(run.stateJson || {}), ...input };
+    const emitAndAudit = (event: AiProcessEventPayload) => {
+      emitEvent?.(event);
+      void AiAuditEvent.query(knex).insert({
+        id: randomUUID(),
+        tenantId: resolvedTenantId,
+        runId: run.id,
+        eventType: event.type,
+        payloadJson: event,
+      });
+    };
+
+    const result = await runCompiledGraph(
+      {
+        compiledGraph: compiled,
+        input: mergedState,
+        toolRegistry,
+        toolContext: { tenantId: resolvedTenantId, userId },
+        onEvent: (event) =>
+          emitAndAudit({ ...event, runId: run.id, sessionId }),
+        llmDecision: async (node, state) =>
+          this.mockDecision(node.id, state),
+      },
+      run.currentNodeId ?? undefined,
+    );
+
+    const updatedRun = await this.persistRunResult(run.id, result, knex);
+
+    return { run: updatedRun, result };
+  }
+
+  private async persistRunResult(runId: string, result: any, knex: Knex) {
+    const endedAt =
+      result.status === 'completed' || result.status === 'error'
+        ? new Date()
+        : null;
+
+    return AiProcessRun.query(knex).patchAndFetchById(runId, {
+      status: result.status,
+      outputJson: result.output,
+      errorJson: result.error,
+      stateJson: result.state,
+      currentNodeId: result.currentNodeId ?? null,
+      endedAt,
+    });
+  }
+
+  private async mockDecision(
+    nodeId: string,
+    state: Record<string, unknown>,
+  ) {
+    if (nodeId === 'decide_account') {
+      const accountName = (state.accountName as string) ?? 'New Account';
+      const accountAction = state.accountId ? 'find' : 'create';
+      return { accountAction, accountName };
+    }
+    if (nodeId === 'decide_contact') {
+      const firstName = (state.firstName as string) ?? 'Jane';
+      const lastName = (state.lastName as string) ?? 'Doe';
+      const contactAction = state.contactId ? 'find' : 'create';
+      return { contactAction, firstName, lastName };
+    }
+    return {};
+  }
+}

backend/src/ai-processes/ai-processes.stream.service.ts

@@ -0,0 +1,33 @@
+import { Injectable } from '@nestjs/common';
+import { MessageEvent } from '@nestjs/common';
+import { Observable, Subject } from 'rxjs';
+import { AiProcessEventPayload } from './ai-processes.types';
+
+@Injectable()
+export class AiProcessesStreamService {
+  private readonly streams = new Map<string, Subject<MessageEvent>>();
+
+  getStream(sessionId: string): Observable<MessageEvent> {
+    return this.getSubject(sessionId).asObservable();
+  }
+
+  emit(sessionId: string, payload: AiProcessEventPayload) {
+    const subject = this.getSubject(sessionId);
+    subject.next({ type: payload.type, data: payload });
+  }
+
+  close(sessionId: string) {
+    const subject = this.streams.get(sessionId);
+    if (subject) {
+      subject.complete();
+      this.streams.delete(sessionId);
+    }
+  }
+
+  private getSubject(sessionId: string) {
+    if (!this.streams.has(sessionId)) {
+      this.streams.set(sessionId, new Subject<MessageEvent>());
+    }
+    return this.streams.get(sessionId) as Subject<MessageEvent>;
+  }
+}

backend/src/ai-processes/ai-processes.types.ts

@@ -0,0 +1,124 @@
+import { JSONSchema7 } from 'json-schema';
+
+export type AiNodeType =
+  | 'Start'
+  | 'LLMDecisionNode'
+  | 'ToolNode'
+  | 'HumanInputNode'
+  | 'End';
+
+export interface ProcessGraphDefinition {
+  id: string;
+  name: string;
+  description?: string;
+  allowCycles?: boolean;
+  maxIterations?: number;
+  nodes: ProcessGraphNode[];
+  edges: ProcessGraphEdge[];
+}
+
+export interface ProcessGraphNode {
+  id: string;
+  type: AiNodeType;
+  position?: { x: number; y: number };
+  data:
+    | StartNodeData
+    | LLMDecisionNodeData
+    | ToolNodeData
+    | HumanInputNodeData
+    | EndNodeData;
+}
+
+export interface ProcessGraphEdge {
+  id: string;
+  source: string;
+  target: string;
+  condition?: JsonLogicExpression;
+}
+
+export type JsonLogicExpression = Record<string, unknown>;
+
+export interface StartNodeData {
+  label?: string;
+}
+
+export interface EndNodeData {
+  label?: string;
+}
+
+export interface LLMDecisionNodeData {
+  label?: string;
+  promptTemplate: string;
+  inputKeys: string[];
+  outputSchema: JSONSchema7;
+  model: {
+    name: string;
+    temperature: number;
+  };
+}
+
+export interface ToolNodeData {
+  label?: string;
+  toolName: string;
+  argsTemplate: Record<string, unknown>;
+  outputMapping: Record<string, string>;
+}
+
+export interface HumanInputNodeData {
+  label?: string;
+  requiredFieldsSchema: JSONSchema7;
+  promptToUser: string;
+}
+
+export interface CompiledGraph {
+  graphId: string;
+  version: number;
+  nodes: ProcessGraphNode[];
+  edges: ProcessGraphEdge[];
+  startNodeId: string;
+  endNodeIds: string[];
+  adjacency: Record<string, string[]>;
+  allowCycles?: boolean;
+  maxIterations?: number;
+}
+
+export type AiProcessStatus = 'running' | 'waiting' | 'completed' | 'error';
+
+export interface AiProcessRunContext {
+  state: Record<string, unknown>;
+  currentNodeId?: string;
+  iterationCount?: number;
+}
+
+export type AiProcessEventType =
+  | 'agent_started'
+  | 'processes_listed'
+  | 'process_selected'
+  | 'node_started'
+  | 'tool_called'
+  | 'node_completed'
+  | 'need_input'
+  | 'final'
+  | 'error';
+
+export interface AiProcessEventPayload {
+  type: AiProcessEventType;
+  runId?: string;
+  sessionId?: string;
+  nodeId?: string;
+  toolName?: string;
+  processId?: string;
+  version?: number;
+  data?: Record<string, unknown>;
+}
+
+export interface NeedInputPayload {
+  runId: string;
+  requiredFieldsSchema: JSONSchema7;
+  promptToUser: string;
+}
+
+export interface ProcessSelection {
+  processId: string;
+  version: number;
+}

backend/src/ai-processes/demo-process.ts

@@ -0,0 +1,173 @@
+import { ProcessGraphDefinition } from './ai-processes.types';
+
+export const demoRegisterNewPetProcess: ProcessGraphDefinition = {
+  id: 'register_new_pet',
+  name: 'Register New Pet',
+  description: 'Resolve account/contact then create pet.',
+  allowCycles: false,
+  nodes: [
+    {
+      id: 'start',
+      type: 'Start',
+      data: { label: 'Start' },
+    },
+    {
+      id: 'decide_account',
+      type: 'LLMDecisionNode',
+      data: {
+        label: 'Decide Account Action',
+        promptTemplate:
+          'Decide whether to find or create an account. Return JSON {"accountAction":"find|create","accountName":"string"}.',
+        inputKeys: ['accountName'],
+        outputSchema: {
+          type: 'object',
+          required: ['accountAction', 'accountName'],
+          properties: {
+            accountAction: { type: 'string', enum: ['find', 'create'] },
+            accountName: { type: 'string' },
+          },
+          additionalProperties: false,
+        },
+        model: { name: 'gpt-4o-mini', temperature: 0 },
+      },
+    },
+    {
+      id: 'find_account',
+      type: 'ToolNode',
+      data: {
+        label: 'Find Account',
+        toolName: 'findAccount',
+        argsTemplate: { accountName: '{{state.accountName}}' },
+        outputMapping: { accountId: 'accountId', found: 'accountFound' },
+      },
+    },
+    {
+      id: 'create_account',
+      type: 'ToolNode',
+      data: {
+        label: 'Create Account',
+        toolName: 'createAccount',
+        argsTemplate: { accountName: '{{state.accountName}}' },
+        outputMapping: { accountId: 'accountId' },
+      },
+    },
+    {
+      id: 'decide_contact',
+      type: 'LLMDecisionNode',
+      data: {
+        label: 'Decide Contact Action',
+        promptTemplate:
+          'Decide whether to find or create a contact. Return JSON {"contactAction":"find|create","firstName":"string","lastName":"string"}.',
+        inputKeys: ['firstName', 'lastName'],
+        outputSchema: {
+          type: 'object',
+          required: ['contactAction', 'firstName', 'lastName'],
+          properties: {
+            contactAction: { type: 'string', enum: ['find', 'create'] },
+            firstName: { type: 'string' },
+            lastName: { type: 'string' },
+          },
+          additionalProperties: false,
+        },
+        model: { name: 'gpt-4o-mini', temperature: 0 },
+      },
+    },
+    {
+      id: 'find_contact',
+      type: 'ToolNode',
+      data: {
+        label: 'Find Contact',
+        toolName: 'findContact',
+        argsTemplate: {
+          accountId: '{{state.accountId}}',
+          firstName: '{{state.firstName}}',
+          lastName: '{{state.lastName}}',
+        },
+        outputMapping: { contactId: 'contactId', found: 'contactFound' },
+      },
+    },
+    {
+      id: 'create_contact',
+      type: 'ToolNode',
+      data: {
+        label: 'Create Contact',
+        toolName: 'createContact',
+        argsTemplate: {
+          accountId: '{{state.accountId}}',
+          firstName: '{{state.firstName}}',
+          lastName: '{{state.lastName}}',
+        },
+        outputMapping: { contactId: 'contactId' },
+      },
+    },
+    {
+      id: 'need_pet',
+      type: 'HumanInputNode',
+      data: {
+        label: 'Collect Pet Info',
+        promptToUser: 'What is the pet name and type?',
+        requiredFieldsSchema: {
+          type: 'object',
+          required: ['petName', 'petType'],
+          properties: {
+            petName: { type: 'string' },
+            petType: { type: 'string' },
+          },
+          additionalProperties: false,
+        },
+      },
+    },
+    {
+      id: 'create_pet',
+      type: 'ToolNode',
+      data: {
+        label: 'Create Pet',
+        toolName: 'createPet',
+        argsTemplate: {
+          contactId: '{{state.contactId}}',
+          petName: '{{state.petName}}',
+          petType: '{{state.petType}}',
+        },
+        outputMapping: { petId: 'petId' },
+      },
+    },
+    {
+      id: 'end',
+      type: 'End',
+      data: { label: 'End' },
+    },
+  ],
+  edges: [
+    { id: 'e_start_account', source: 'start', target: 'decide_account' },
+    {
+      id: 'e_account_find',
+      source: 'decide_account',
+      target: 'find_account',
+      condition: { '==': [{ var: 'accountAction' }, 'find'] },
+    },
+    {
+      id: 'e_account_create',
+      source: 'decide_account',
+      target: 'create_account',
+      condition: { '==': [{ var: 'accountAction' }, 'create'] },
+    },
+    { id: 'e_account_to_contact', source: 'find_account', target: 'decide_contact' },
+    { id: 'e_create_account_to_contact', source: 'create_account', target: 'decide_contact' },
+    {
+      id: 'e_contact_find',
+      source: 'decide_contact',
+      target: 'find_contact',
+      condition: { '==': [{ var: 'contactAction' }, 'find'] },
+    },
+    {
+      id: 'e_contact_create',
+      source: 'decide_contact',
+      target: 'create_contact',
+      condition: { '==': [{ var: 'contactAction' }, 'create'] },
+    },
+    { id: 'e_contact_to_pet', source: 'find_contact', target: 'need_pet' },
+    { id: 'e_create_contact_to_pet', source: 'create_contact', target: 'need_pet' },
+    { id: 'e_need_pet_to_create', source: 'need_pet', target: 'create_pet' },
+    { id: 'e_pet_to_end', source: 'create_pet', target: 'end' },
+  ],
+};

backend/src/ai-processes/dto/ai-chat.dto.ts

@@ -0,0 +1,28 @@
+import { IsArray, IsObject, IsOptional, IsString } from 'class-validator';
+
+export class CreateChatSessionDto {
+  @IsOptional()
+  @IsString()
+  context?: string;
+}
+
+export class SendChatMessageDto {
+  @IsString()
+  message!: string;
+
+  @IsOptional()
+  @IsArray()
+  history?: { role: string; text: string }[];
+
+  @IsOptional()
+  @IsObject()
+  context?: Record<string, unknown>;
+
+  @IsOptional()
+  @IsString()
+  sessionId?: string;
+
+  @IsOptional()
+  @IsString()
+  processId?: string;
+}

backend/src/ai-processes/dto/ai-process.dto.ts

@@ -0,0 +1,24 @@
+import { IsArray, IsObject, IsOptional, IsString } from 'class-validator';
+import { ProcessGraphDefinition } from '../ai-processes.types';
+
+export class CreateAiProcessDto {
+  @IsString()
+  name!: string;
+
+  @IsOptional()
+  @IsString()
+  description?: string;
+
+  @IsObject()
+  graph!: ProcessGraphDefinition;
+}
+
+export class UpdateAiProcessDto {
+  @IsObject()
+  graph!: ProcessGraphDefinition;
+}
+
+export class AiProcessListResponseDto {
+  @IsArray()
+  items!: Record<string, unknown>[];
+}

backend/src/ai-processes/dto/ai-run.dto.ts

@@ -0,0 +1,19 @@
+import { IsObject, IsOptional, IsString } from 'class-validator';
+
+export class CreateAiRunDto {
+  @IsObject()
+  input!: Record<string, unknown>;
+
+  @IsOptional()
+  @IsString()
+  sessionId?: string;
+}
+
+export class ResumeAiRunDto {
+  @IsObject()
+  input!: Record<string, unknown>;
+
+  @IsOptional()
+  @IsString()
+  sessionId?: string;
+}

backend/src/ai-processes/tools/tool-registry.ts

@@ -0,0 +1,48 @@
+export interface ToolContext {
+  tenantId: string;
+  userId: string;
+  authScopes?: string[];
+}
+
+export type ToolHandler = (
+  ctx: ToolContext,
+  args: Record<string, unknown>,
+) => Promise<Record<string, unknown>>;
+
+const defaultTools: Record<string, ToolHandler> = {
+  findAccount: async () => ({ accountId: null, found: false }),
+  createAccount: async (_ctx, args) => ({ accountId: `acc_${Date.now()}`, args }),
+  findContact: async () => ({ contactId: null, found: false }),
+  createContact: async (_ctx, args) => ({ contactId: `con_${Date.now()}`, args }),
+  createPet: async (_ctx, args) => ({ petId: `pet_${Date.now()}`, args }),
+};
+
+const tenantAllowlist: Record<string, string[]> = {
+  default: Object.keys(defaultTools),
+};
+
+export class ToolRegistry {
+  private tools: Record<string, ToolHandler>;
+  private allowlist: Record<string, string[]>;
+
+  constructor(
+    tools: Record<string, ToolHandler> = defaultTools,
+    allowlist: Record<string, string[]> = tenantAllowlist,
+  ) {
+    this.tools = tools;
+    this.allowlist = allowlist;
+  }
+
+  isToolAllowed(tenantId: string, toolName: string) {
+    const allowed = this.allowlist[tenantId] || this.allowlist.default || [];
+    return allowed.includes(toolName);
+  }
+
+  getTool(toolName: string): ToolHandler {
+    const tool = this.tools[toolName];
+    if (!tool) {
+      throw new Error(`Tool ${toolName} is not registered.`);
+    }
+    return tool;
+  }
+}

backend/src/app.module.ts

@@ -9,6 +9,7 @@ import { AppBuilderModule } from './app-builder/app-builder.module';
 import { PageLayoutModule } from './page-layout/page-layout.module';
 import { VoiceModule } from './voice/voice.module';
 import { AiAssistantModule } from './ai-assistant/ai-assistant.module';
+import { AiProcessesModule } from './ai-processes/ai-processes.module';
 
 @Module({
   imports: [
@@ -24,6 +25,7 @@ import { AiAssistantModule } from './ai-assistant/ai-assistant.module';
     PageLayoutModule,
     VoiceModule,
     AiAssistantModule,
+    AiProcessesModule,
   ],
 })
 export class AppModule {}

backend/src/models/ai-chat.model.ts

@@ -0,0 +1,64 @@
+import { randomUUID } from 'crypto';
+import { snakeCaseMappers } from 'objection';
+import { BaseModel } from './base.model';
+
+export class AiChatSession extends BaseModel {
+  static tableName = 'ai_chat_sessions';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  tenantId!: string;
+  userId!: string;
+  createdAt!: Date;
+
+  $beforeInsert() {
+    this.id = this.id || randomUUID();
+    this.createdAt = this.createdAt || new Date();
+  }
+
+  $beforeUpdate() {}
+
+  static get relationMappings() {
+    return {
+      messages: {
+        relation: BaseModel.HasManyRelation,
+        modelClass: AiChatMessage,
+        join: {
+          from: 'ai_chat_sessions.id',
+          to: 'ai_chat_messages.sessionId',
+        },
+      },
+    };
+  }
+}
+
+export class AiChatMessage extends BaseModel {
+  static tableName = 'ai_chat_messages';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  sessionId!: string;
+  role!: string;
+  content!: string;
+  createdAt!: Date;
+
+  $beforeInsert() {
+    this.id = this.id || randomUUID();
+    this.createdAt = this.createdAt || new Date();
+  }
+
+  $beforeUpdate() {}
+
+  static get relationMappings() {
+    return {
+      session: {
+        relation: BaseModel.BelongsToOneRelation,
+        modelClass: AiChatSession,
+        join: {
+          from: 'ai_chat_messages.sessionId',
+          to: 'ai_chat_sessions.id',
+        },
+      },
+    };
+  }
+}

backend/src/models/ai-process.model.ts

@@ -0,0 +1,147 @@
+import { randomUUID } from 'crypto';
+import { QueryContext, snakeCaseMappers } from 'objection';
+import { BaseModel } from './base.model';
+
+export class AiProcess extends BaseModel {
+  static tableName = 'ai_processes';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  tenantId!: string;
+  name!: string;
+  description?: string;
+  latestVersion!: number;
+  createdBy!: string;
+  createdAt!: Date;
+  updatedAt!: Date;
+
+  $beforeInsert(queryContext: QueryContext) {
+    this.id = this.id || randomUUID();
+    super.$beforeInsert(queryContext);
+  }
+
+  static get relationMappings() {
+    return {
+      versions: {
+        relation: BaseModel.HasManyRelation,
+        modelClass: AiProcessVersion,
+        join: {
+          from: 'ai_processes.id',
+          to: 'ai_process_versions.processId',
+        },
+      },
+      runs: {
+        relation: BaseModel.HasManyRelation,
+        modelClass: AiProcessRun,
+        join: {
+          from: 'ai_processes.id',
+          to: 'ai_process_runs.processId',
+        },
+      },
+    };
+  }
+}
+
+export class AiProcessVersion extends BaseModel {
+  static tableName = 'ai_process_versions';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  tenantId!: string;
+  processId!: string;
+  version!: number;
+  graphJson!: Record<string, unknown>;
+  compiledJson!: Record<string, unknown>;
+  createdBy!: string;
+  createdAt!: Date;
+
+  $beforeInsert() {
+    this.id = this.id || randomUUID();
+    this.createdAt = this.createdAt || new Date();
+  }
+
+  $beforeUpdate() {}
+
+  static get relationMappings() {
+    return {
+      process: {
+        relation: BaseModel.BelongsToOneRelation,
+        modelClass: AiProcess,
+        join: {
+          from: 'ai_process_versions.processId',
+          to: 'ai_processes.id',
+        },
+      },
+    };
+  }
+}
+
+export class AiProcessRun extends BaseModel {
+  static tableName = 'ai_process_runs';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  tenantId!: string;
+  processId!: string;
+  version!: number;
+  status!: string;
+  inputJson!: Record<string, unknown>;
+  outputJson?: Record<string, unknown> | null;
+  errorJson?: Record<string, unknown> | null;
+  stateJson?: Record<string, unknown>;
+  currentNodeId?: string | null;
+  startedAt?: Date;
+  endedAt?: Date | null;
+
+  $beforeInsert() {
+    this.id = this.id || randomUUID();
+    this.startedAt = this.startedAt || new Date();
+  }
+
+  $beforeUpdate() {}
+
+  static get relationMappings() {
+    return {
+      process: {
+        relation: BaseModel.BelongsToOneRelation,
+        modelClass: AiProcess,
+        join: {
+          from: 'ai_process_runs.processId',
+          to: 'ai_processes.id',
+        },
+      },
+    };
+  }
+}
+
+export class AiAuditEvent extends BaseModel {
+  static tableName = 'ai_audit_events';
+  static columnNameMappers = snakeCaseMappers();
+
+  id!: string;
+  tenantId!: string;
+  runId!: string;
+  eventType!: string;
+  payloadJson!: Record<string, unknown>;
+  createdAt!: Date;
+
+  $beforeInsert() {
+    this.id = this.id || randomUUID();
+    this.createdAt = this.createdAt || new Date();
+  }
+
+  $beforeUpdate() {}
+
+  static get relationMappings() {
+    return {
+      run: {
+        relation: BaseModel.BelongsToOneRelation,
+        modelClass: AiProcessRun,
+        join: {
+          from: 'ai_audit_events.runId',
+          to: 'ai_process_runs.id',
+        },
+      },
+    };
+  }
+}