Codex.app 26.422.62136 on macOS 15.7.4 crashes/loads fallback during startup when ~/.ssh/config includes a large SSH config tree. Logs show remote-connections/discovery spawning many ssh -G commands concurrently, failing with spawn EBADF, followed by ERR_ABORTED loading app://-/index.html?hostId=local and Codex Helper (Renderer) SIGABRT.
That’s the result of the gpt-5.5 investigation locally. The net result of this bug is that the codex app is unusable (takes a while to launch and eventually loads a blank window that says “Something went wrong…”) without modifying my ~/.ssh/config file to exclude large numbers of host entries. The codex CLI does not have the same issue.
Not sure if this is the correct place to report bugs, but a quick search didn’t net me a more obvious place.