chore: bump version to 0.1580

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/session.ts

@@ -467,6 +467,10 @@ export class Session extends EventEmitter {
     return this._terminalBuffer.value;
   }
 
+  get terminalBufferLength(): number {
+    return this._terminalBuffer.length;
+  }
+
   get textOutput(): string {
     return this._textOutput.value;
   }