Environment variables

CmdMox exposes two environment variables to coordinate shims with the IPC server.

• CMOX_IPC_SOCKET – path to the Unix domain socket used by shims on POSIX systems. Entering an EnvironmentManager sets this automatically and IPCServer.start() refreshes it, so manual overrides are rarely needed. On Windows EnvironmentManager.export_ipc_environment still exports a logical socket path, and the IPC layer hashes that path into a deterministic named pipe so existing PATH-filtering logic keeps working. Shims exit with an error if the variable is missing.
• CMOX_IPC_TIMEOUT – communication timeout in seconds. When the IPC server starts under an active EnvironmentManager, the configured timeout is exported automatically (default 5.0). Override this to tune how long clients wait for each connect/send/receive attempt before raising a TimeoutError.

Most tests should rely on the fixture to manage these variables.