]> 2026-09-08T16:35:33+09:00 Lesson:pivot-b200-20260717-tmux-argument-boundary-a01 3000 ko Applies to detached remote experiment launchers that drive tmux through nested local and remote shells. The launcher invoked remote tmux send-keys through SSH with the full experiment command intended as one quoted argument. S3ResearchAgent medium B200-2 sequential migration launch at source commit 038c9cd00c25fc83678d4d698f8780bfc5d96369. 2026-07-17T07:34:01Z 2461238.8152894 Pane command-not-found at 2026-07-17; no global lock owner, no run directory, and zero B200 compute processes. Local quoting did not survive SSH's remote command reconstruction as a single tmux argument. tmux then concatenated multiple send-keys string arguments without inserting spaces. SSH consumed the tmux send-keys argument boundary The remote pane received a single concatenated token such as exec.venv/bin/python-mscripts..., returned command-not-found, and remained at an idle bash prompt. No global lock, run directory, or GPU compute process was created. Why did a quoted tmux launch command arrive without spaces on the remote B200 shell? lab For tmux send-keys through SSH, do not assume local one-argument quoting survives. Encode separators explicitly as tmux Space key tokens or preserve quoting inside the remote command string, then immediately verify the pane, lock owner, run directory, and GPU state. Draft 2026-07-18T14:58:54Z 2461240.1242361 2026-07-18T14:58:54Z 2461240.1242361 pivot-b200-20260717-tmux-argument-boundary-a01 3000 Evidence:pivot-b200-tmux-argument-boundary-a01 2026-07-17T07:34:30Z 2461238.815625 S3ResearchAgent B200-2 tmux pane pivot_b200_generation_20260717_a01 on 2026-07-17 log The pane showed a concatenated command token and command-not-found. Immediate checks showed no global lock owner and no GPU compute application; the append-only run ID remained unused. not_recorded pivot-b200-20260717-tmux-argument-boundary-a01# 79effba667b8bc104a6a0e7c17a1a2e6 3000 2026-07-18T14:58:54Z 2461240.1242361 S3ResearchAgent verify_fab13e41a5430ec76426 metadata_only context 수집 manifest의 실패 원장만 보존되어 원문 주장을 검증하지 못함. inconclusive 689990da723c183d73e5102f6b5a7c8972497dfa210f09dd79bb20472fb857d5 R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=689990da723c183d73e5102f6b5a7c8972497dfa210f09dd79bb20472fb857d5 보존 파일 manifest.json Evidence:pivot-b200-tmux-argument-boundary-a01 47c30ef710f3b5d6ef764234c6f4a4c02240e73581bc0d901ff4ba1236bb06ec pivot-b200-20260717-tmux-argument-boundary-a01# a62c9da7293cfec2ff52f9e74c27c755 3000 2026-07-18T14:58:54Z 2461240.1242361 S3ResearchAgent verify_25c6e0078c590731f0bb partial_source observation,interpretation,reusable_lesson claim-bearing O/I/R coverage was not established; confidence forced to low inconclusive d4fc6aa62e7bb6909a59c357cc7dbc25add2228b352061cb93793c840b6f3c9e R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=d4fc6aa62e7bb6909a59c357cc7dbc25add2228b352061cb93793c840b6f3c9e; high-confidence adjudication ledger The cited tmux pane transcript is not present in the source manifest or supplemental set. Evidence:pivot-b200-tmux-argument-boundary-a01 47c30ef710f3b5d6ef764234c6f4a4c02240e73581bc0d901ff4ba1236bb06ec pivot-b200-20260717-tmux-argument-boundary-a01# a7a3aefcad8da1c9867e1be130ba59a5