Issue 24322 reproduction attempts, fs-34 (Ubuntu), codex-cli 0.163.0, 2026-10-27, T3 main 96fc7b9551
Driver talks JSON-RPC to `codex app-server` directly; exec calls go through codex-code-mode-host.

=== attempt 1 control + reader stalled 90s, 4 KiB stdout pipe, live host reused  [run-072346]
     0.001 NOTE stdout pipe size set to 4096
     0.002 -> initialize
     0.326 -> thread/start
     0.399 -> turn/start
     4.291 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
     6.437 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
     8.054 <- exec "/bin/bash -lc 'echo three'" status=completed exit=0 output_bytes=6 negotiation_error=False
    10.784 <- exec "/bin/bash -lc 'seq 1 3000'" status=completed exit=0 output_bytes=13893 negotiation_error=False
    13.982 <- turn/completed thread=..6c6f12
    13.982 NOTE control: turn completed=True
    13.982 NOTE stalled: reader stalled for 90.0s
    13.982 -> turn/start
   103.983 NOTE stalled: reader resumed
   103.984 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
   103.985 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
   103.985 <- exec "/bin/bash -lc 'echo three'" status=completed exit=0 output_bytes=6 negotiation_error=False
   103.985 <- exec "/bin/bash -lc 'seq 1 3000'" status=completed exit=0 output_bytes=13893 negotiation_error=False
   103.986 <- turn/completed thread=..6c6f12
   103.986 NOTE stalled: turn completed=True
   104.351 NOTE exit

=== attempt 2 reader stalled 90s, code-mode host SIGKILLed at stall start (forces respawn + handshake during stall)  [run-072633]
     0.001 NOTE stdout pipe size set to 4096
     0.001 -> initialize
     0.328 -> thread/start
     0.404 -> turn/start
     3.518 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
     5.015 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
     6.569 <- exec "/bin/bash -lc 'echo three'" status=completed exit=0 output_bytes=6 negotiation_error=False
      8.52 <- exec "/bin/bash -lc 'seq 1 3000'" status=completed exit=0 output_bytes=13893 negotiation_error=False
     9.554 <- turn/completed thread=..3645a5
     9.554 NOTE control: turn completed=True
     9.554 NOTE stalled: reader stalled for 90.0s
     9.557 NOTE killed code-mode host pid 34477
     9.557 -> turn/start
    99.557 NOTE stalled: reader resumed
     99.56 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
     99.56 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
    99.561 <- exec "/bin/bash -lc 'echo three'" status=completed exit=0 output_bytes=6 negotiation_error=False
    99.561 <- exec "/bin/bash -lc 'seq 1 3000'" status=completed exit=0 output_bytes=13893 negotiation_error=False
    99.562 <- turn/completed thread=..3645a5
    99.562 NOTE stalled: turn completed=True
   106.335 NOTE exit

=== attempt 3 three threads on one app-server, reader stalled 150s, ~7.3 MB of exec output queued, host first spawned during the stall  [run-scale-072902]
     0.001 -> initialize
     0.304 -> thread/start
     0.375 -> thread/start
     0.417 -> thread/start
     0.455 NOTE reader stalled for 150.0s
     0.466 -> turn/start
     0.466 -> turn/start
     0.466 -> turn/start
   150.466 NOTE reader resumed
    150.49 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
   150.517 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
   150.535 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
    150.54 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
    150.54 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
   150.541 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
   150.558 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
   150.577 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
   150.597 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
   150.605 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
   150.606 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
   150.606 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
   150.606 <- turn/completed thread=..56f822
   150.607 <- turn/completed thread=..400659
   150.607 NOTE thread 01a17c43-37fc-73e3-8fe6-5cd8f456f822 completed=True
   150.607 <- turn/completed thread=..e4f283
   150.607 NOTE thread 01a17c43-3845-7d82-8968-4e38d1e4f283 completed=True
   150.607 NOTE thread 01a17c43-386d-7b72-b0bd-52ce3a400659 completed=True
   150.607 NOTE bytes read from app-server stdout: 7335895
   150.721 NOTE exit

=== attempt 4a whole tree in a scope at MemoryHigh=300M with a 350 MiB hog (severe throttling)  [run-throttle-073307]
     9.916 -> initialize

=== attempt 4b whole tree in a scope at MemoryHigh=450M with a 250 MiB hog (sustained throttling)  [run-throttle2-073629]
     0.005 -> initialize
     0.684 -> thread/start
     0.768 -> thread/start
     0.807 NOTE reader stalled for 5.0s
     0.811 -> turn/start
     0.811 -> turn/start
     5.811 NOTE reader resumed
     5.826 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
     6.501 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
      7.37 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
     8.653 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
    10.674 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
    11.275 <- exec "/bin/bash -lc 'echo one'" status=completed exit=0 output_bytes=4 negotiation_error=False
    11.944 <- turn/completed thread=..1fa0a9
    11.945 NOTE thread 01a17c4a-1f11-7552-add6-20a8dd1fa0a9 completed=True
    14.501 <- exec "/bin/bash -lc 'seq 1 400000'" status=completed exit=0 output_bytes=1048607 negotiation_error=False
    16.381 <- exec "/bin/bash -lc 'echo two'" status=completed exit=0 output_bytes=4 negotiation_error=False
    17.728 <- turn/completed thread=..5b29b4
    17.728 NOTE thread 01a17c4a-1f60-7ee3-a875-d2b3065b29b4 completed=True
    17.729 NOTE bytes read from app-server stdout: 4891558
    18.545 NOTE exit