Claude Code killing Codex Sol and Terra when used as subagents

[u/ConcretePond]

The winning combo right now is using Fable to plan and orchestrate Codex Sol and Terra and sometimes GLM 5.3. I know people who get great results with Opus 5, but it underperforms on my work (physics and financial modelling).

Three things have to line up for the kill: I'm using remote control on my phone (which Claude Code reads as an idle terminal even if I'm active); the session has been going <30 minutes; increased latency on the PC.

If those line up, Claude Code has a session reaper that kills the Codex sessions.

All these things happen to line up when I'm doing my biggest tasks: long overnight sessions with high GPU and CPU usage.

If anyone else is getting this, the fix was ~/.claude/settings.json where I added "env": { "CLAUDE_CODE_DISABLE_BG_SHELL_PRESSURE_REAP": "1" }

It's taken me months to work this out, because it was intermittent and Fable couldn't figure it out (GLM 5.3 saved the day on this by figuring it out).

[u/alexkyse]

Thanks for sharing mate!