first commit

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

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+import { z } from "zod";
+
+export const ReasoningStartEvent = z.object({
+    type: z.literal("reasoning-start"),
+});
+
+export const ReasoningDeltaEvent = z.object({
+    type: z.literal("reasoning-delta"),
+    delta: z.string(),
+});
+
+export const ReasoningEndEvent = z.object({
+    type: z.literal("reasoning-end"),
+});
+
+export const TextStartEvent = z.object({
+    type: z.literal("text-start"),
+});
+
+export const TextDeltaEvent = z.object({
+    type: z.literal("text-delta"),
+    delta: z.string(),
+});
+
+export const TextEndEvent = z.object({
+    type: z.literal("text-end"),
+});
+
+export const ToolCallEvent = z.object({
+    type: z.literal("tool-call"),
+    toolCallId: z.string(),
+    toolName: z.string(),
+    input: z.any(),
+});
+
+export const UsageEvent = 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 StreamEvent = z.union([
+    ReasoningStartEvent,
+    ReasoningDeltaEvent,
+    ReasoningEndEvent,
+    TextStartEvent,
+    TextDeltaEvent,
+    TextEndEvent,
+    ToolCallEvent,
+    UsageEvent,
+]);