Misc SDK fixes (#4752)

Remove codex-level workingDirectory
Throw on turn.failed in `run()`
Cleanup readme

sdk/typescript/src/codexOptions.ts

@@ -2,5 +2,4 @@ export type CodexOptions = {
   codexPathOverride?: string;
   baseUrl?: string;
   apiKey?: string;
-  workingDirectory?: string;
 };

sdk/typescript/src/index.ts

@@ -30,4 +30,4 @@ export { Codex } from "./codex";
 
 export type { CodexOptions } from "./codexOptions";
 
-export type { ThreadOptions as TheadOptions, ApprovalMode, SandboxMode } from "./threadOptions";
+export type { ThreadOptions, ApprovalMode, SandboxMode } from "./threadOptions";

sdk/typescript/src/thread.ts

@@ -1,5 +1,5 @@
 import { CodexOptions } from "./codexOptions";
-import { ThreadEvent, Usage } from "./events";
+import { ThreadEvent, ThreadError, Usage } from "./events";
 import { CodexExec } from "./exec";
 import { ThreadItem } from "./items";
 import { ThreadOptions } from "./threadOptions";
@@ -87,6 +87,7 @@ export class Thread {
     const items: ThreadItem[] = [];
     let finalResponse: string = "";
     let usage: Usage | null = null;
+    let turnFailure: ThreadError | null = null;
     for await (const event of generator) {
       if (event.type === "item.completed") {
         if (event.item.type === "agent_message") {
@@ -95,8 +96,14 @@ export class Thread {
         items.push(event.item);
       } else if (event.type === "turn.completed") {
         usage = event.usage;
+      } else if (event.type === "turn.failed") {
+        turnFailure = event.error;
+        break;
       }
     }
+    if (turnFailure) {
+      throw new Error(turnFailure.message);
+    }
     return { items, finalResponse, usage };
   }
 }