OpenCode startup on Linux ARM could run a --version probe before launching the configured Runtime and recheck registered remote binary metadata. Execution now trusts the selected path and registered manifest identity after setup-time verification, so switching and cold launch avoid duplicate binary work.
Release note: 优化 Linux ARM 上切换 OpenCode 的启动速度;已安装或已登记的 Runtime 在执行时不再重复启动或检查二进制。