set up basic workflow execution

apps/cli/src/application/entities/workflow-event.ts

@@ -0,0 +1,69 @@
+import { z } from "zod";
+import { LlmStepStreamEvent } from "./llm-step-event.js";
+import { Workflow } from "./workflow.js";
+import { Message } from "./message.js";
+
+export const WorkflowStreamStartEvent = z.object({
+    type: z.literal("workflow-start"),
+    workflowId: z.string(),
+    workflow: Workflow,
+    background: z.boolean(),
+});
+
+export const WorkflowStreamStepStartEvent = z.object({
+    type: z.literal("workflow-step-start"),
+    stepId: z.string(),
+    stepType: z.enum(["agent", "function"]),
+});
+
+export const WorkflowStreamStepStreamEventEvent = z.object({
+    type: z.literal("workflow-step-stream-event"),
+    stepId: z.string(),
+    event: LlmStepStreamEvent,
+});
+
+export const WorkflowStreamStepMessageEvent = z.object({
+    type: z.literal("workflow-step-message"),
+    stepId: z.string(),
+    message: Message,
+});
+
+export const WorkflowStreamStepToolInvocationEvent = z.object({
+    type: z.literal("workflow-step-tool-invocation"),
+    stepId: z.string(),
+    toolName: z.string(),
+    input: z.string(),
+});
+
+export const WorkflowStreamStepToolResultEvent = z.object({
+    type: z.literal("workflow-step-tool-result"),
+    stepId: z.string(),
+    toolName: z.string(),
+    result: z.any(),
+});
+
+export const WorkflowStreamStepEndEvent = z.object({
+    type: z.literal("workflow-step-end"),
+    stepId: z.string(),
+});
+
+export const WorkflowStreamEndEvent = z.object({
+    type: z.literal("workflow-end"),
+});
+
+export const WorkflowStreamErrorEvent = z.object({
+    type: z.literal("workflow-error"),
+    error: z.string(),
+});
+
+export const WorkflowStreamEvent = z.union([
+    WorkflowStreamStartEvent,
+    WorkflowStreamStepStartEvent,
+    WorkflowStreamStepStreamEventEvent,
+    WorkflowStreamStepMessageEvent,
+    WorkflowStreamStepToolInvocationEvent,
+    WorkflowStreamStepToolResultEvent,
+    WorkflowStreamStepEndEvent,
+    WorkflowStreamEndEvent,
+    WorkflowStreamErrorEvent,
+]);