CLI Fix: Catch EINVAL from stdin selector registration

[siddhantsomani]

Context

I just installed Hermes agent on my laptop. The installation went through but errored when I launched it. I know how to fix it in my local but it would be good to not crash in such cases.

Error

On macOS with uv-managed Python, launching hermes chat crashes with an unhandled traceback on exit:

File ".../prompt_toolkit/input/vt100.py", line 165, in _attached_input
    loop.add_reader(fd, callback_wrapper)
  ...
  File ".../selectors.py", line 523, in register
    self._selector.control([kev], 0, 0)
OSError: [Errno 22] Invalid argument

Fix

The existing except (KeyError, OSError) handler in HermesCLI.run() already tries to catch this class of error (#6393), but the string check only matches "is not registered" and "Bad file descriptor". The macOS kqueue path raises EINVAL ("Invalid argument"), so the error fell through to raise instead of showing the friendly "reinstall Python via pyenv/Homebrew" message.

Added "Invalid argument" to the condition.

[alt-glitch]

Likely duplicate of #13251 — both add EINVAL handling to the stdin selector guard for #6393. Multiple competing PRs exist (#11866, #8796).

[teknium1]

Closing — superseded by #26077 (merged as commit d3d5916), which preventively probes kqueue at startup and falls back to SelectSelector when fd 0 cannot be registered. The widened except-clause matching EINVAL / EBADF / 'Invalid argument' — which most PRs in this cluster including yours added — is also included.

Thanks for the fix; closing as duplicate of the merged work.