The codex app-server read loop reports EOF before closing the message
channel, so when the process exits right after its final frame, both
channels are ready and select picks one at random — runTurn could drop
an already-received turn/completed and fail with "stream ended before
turn/completed: EOF" (the CI flake on this PR and #8). Drain buffered
frames first; reproduced at ~7%/300 runs before, 0/300 after.
修雨
1c90edb92a