isBunInstalled() spawned <BUN_INSTALL>/bin/bun, which does not exist on Windows where the installer ships bun.exe. spawnSync adds no extension to an explicit path, so the probe failed and the CLI quietly started the server under Node even with Bun installed. The probe now names bun.exe on win32. Claude-Session: https://claude.ai/code/session_01VqV56Hez25hTxXH4ipJfzH