- the module-help subprocess is read as UTF-8 under a cp1252 locale
- the yfinance cache check names the suite's directory, which may sit under the home on Windows
- POSIX file modes and shell upgrade commands are checked only off Windows
- file locking names errno.EDEADLK, which macOS also defines
- the network guard also refuses DNS lookups and curl_cffi requests, the HTTP client yfinance uses, which never touches Python's sockets
- results, the data cache, the memory log and yfinance's time-zone cache live in a directory of the suite's own
Yijia-Xiao