OpenAI Desktop App WSL Thread Resume Fails Due to Missing MCP Transport
huangshiyu13 · ghdev · 2026-08-26
Issue
The OpenAI desktop app (v26.820.7780.0) fails to resume threads hosted in WSL after auto-updating, throwing an invalid transport in mcpservers.codexapp error.
Root Cause
When resuming WSL-hosted threads, the app injects a request-level config entry for mcpservers.codexapp but strips the command/url transport fields. Codex rejects the config due to the missing transport. This bug is specific to the WSL code path; Windows paths function correctly.
Workaround
Disable the WSL integration by setting runCodexInWindowsSubsystemForLinux = false in the config. The expected fix involves including the necessary transport arguments in the WSL path configuration.
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