Name the session subscribe handler type

Author: i1bro

src/CodexAcpClient.ts

@@ -5,6 +5,7 @@ import {type McpServer, RequestError} from "@agentclientprotocol/sdk";
 import type {
     CodexAppServerClient,
     McpStartupResult,
+    SessionHandler,
 } from "./CodexAppServerClient";
 import open from "open";
 import type {
@@ -387,7 +388,7 @@ export class CodexAcpClient {
         return turnCompleted;
     }
 
-    subscribeSession(sessionId: string, handler: Parameters<CodexAppServerClient["subscribeSession"]>[1]): void {
+    subscribeSession(sessionId: string, handler: SessionHandler): void {
         this.codexClient.subscribeSession(sessionId, handler);
     }
 

src/CodexAppServerClient.ts

@@ -47,7 +47,7 @@ import type {
 } from "./app-server/v2";
 import { logger } from "./Logger";
 
-type SessionHandler = {
+export type SessionHandler = {
     handleNotification(notification: ServerNotification): Promise<void>;
     handleCommandExecution(params: CommandExecutionRequestApprovalParams): Promise<CommandExecutionRequestApprovalResponse>;
     handleFileChange(params: FileChangeRequestApprovalParams): Promise<FileChangeRequestApprovalResponse>;