set up basic workflow execution

apps/cli/src/application/entities/llm-step-event.ts

@@ -0,0 +1,56 @@
+import { z } from "zod";
+
+export const LlmStepStreamReasoningStartEvent = z.object({
+    type: z.literal("reasoning-start"),
+});
+
+export const LlmStepStreamReasoningDeltaEvent = z.object({
+    type: z.literal("reasoning-delta"),
+    delta: z.string(),
+});
+
+export const LlmStepStreamReasoningEndEvent = z.object({
+    type: z.literal("reasoning-end"),
+});
+
+export const LlmStepStreamTextStartEvent = z.object({
+    type: z.literal("text-start"),
+});
+
+export const LlmStepStreamTextDeltaEvent = z.object({
+    type: z.literal("text-delta"),
+    delta: z.string(),
+});
+
+export const LlmStepStreamTextEndEvent = z.object({
+    type: z.literal("text-end"),
+});
+
+export const LlmStepStreamToolCallEvent = z.object({
+    type: z.literal("tool-call"),
+    toolCallId: z.string(),
+    toolName: z.string(),
+    input: z.any(),
+});
+
+export const LlmStepStreamUsageEvent = z.object({
+    type: z.literal("usage"),
+    usage: z.object({
+        inputTokens: z.number().optional(),
+        outputTokens: z.number().optional(),
+        totalTokens: z.number().optional(),
+        reasoningTokens: z.number().optional(),
+        cachedInputTokens: z.number().optional(),
+    }),
+});
+
+export const LlmStepStreamEvent = z.union([
+    LlmStepStreamReasoningStartEvent,
+    LlmStepStreamReasoningDeltaEvent,
+    LlmStepStreamReasoningEndEvent,
+    LlmStepStreamTextStartEvent,
+    LlmStepStreamTextDeltaEvent,
+    LlmStepStreamTextEndEvent,
+    LlmStepStreamToolCallEvent,
+    LlmStepStreamUsageEvent,
+]);