]> 2026-09-08T17:12:45+09:00 Lesson:pivot-b200-20260717-launch-lock-a01 3000 ko Applies to the B200 migration runner and any final or bridge runner using repository-local atomic lock directories plus git status --untracked-files=all. Launched the source-bound migration runner at commit 01031e6e484bbd98e00bdc3320f77c45d292f6e1 on B200-2 via the approved SSH route and persistent tmux, with run_id b200-2-generation-20260717-a01 and GPU selector 0. S3ResearchAgent low All 8 B200 GPUs were idle before launch. The runner acquired experiments/runs/.weighted_slo_final.global.lock, then immediately reran its clean-tree gate before model preflight or GPU initialization. 2026-07-17T06:21:38Z 2461238.7650232 failed pre-GPU tmux attempt at source commit 01031e6e484bbd98e00bdc3320f77c45d292f6e1; fixed by commit 8ca2dbb68 adding exact .gitignore entries; no artifact or performance data produced The runner made its own repository-local lock owner metadata visible to the post-lock clean-tree check. This was a lock-path hygiene defect fixed by exact ignore entries; it was not a GPU or model-generation result. B200 migration launch blocked by self-visible lock The runner exited with 'git source changed before lock acquisition'. The lock owner.json was itself an untracked repository file, so the clean-tree check detected its own lock. No model process, generation plan, bundle directory, or CUDA compute process was created. The lock was released and the run ID remained free. Why did the first persistent tmux launch stop before any B200 generation work? lab Source-bound experiment lock directories inside the repository must be explicitly ignored; otherwise a post-lock clean-tree check is guaranteed to fail on its own owner metadata. Draft 2026-07-18T15:00:29Z 2461240.1253357 2026-07-18T15:00:29Z 2461240.1253357 pivot-b200-20260717-launch-lock-a01 3000 live-lock-ignore-fix-8ca2dbb68 2026-07-17T06:22:14Z 2461238.7654398 S3ResearchAgent .gitignore sha256=bb972cf65f7d6c5c7ff5dabe253aef9c6c3110070befe25806052a5ff1be313e; git commit=8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca code Exact repository-local final and bridge lock directories are ignored so their owner.json files do not falsify the runner's post-lock clean-tree assertion. not_recorded pivot-b200-20260717-launch-lock-a01# 39bf5331be6f20ef5ab7ef0498e202b0 3000 2026-07-18T14:58:52Z 2461240.124213 S3ResearchAgent verify_41383a28868d1339cded 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 live-lock-ignore-fix-8ca2dbb68 89cc83e842b92e8240645c85ef4b44f1ffa5f4316cb3e2fb2eb3223f61903c6c pivot-b200-20260717-launch-lock-a01# 543bc819126eb22b46f3e850d9ce47cb 3000 2026-07-18T14:58:53Z 2461240.1242245 S3ResearchAgent verify_adc8aa02f8aa281cf95f partial_source observation,interpretation,reusable_lesson claim-bearing O/I/R coverage was not established; confidence forced to low inconclusive 15cf9181190cfaa5ceb31375d26af951dc265942e73915429220ee8efe05a177 R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=15cf9181190cfaa5ceb31375d26af951dc265942e73915429220ee8efe05a177; high-confidence adjudication ledger Patch supports the ignore fix; the failed launch/runtime cleanup receipt in O is absent. live-lock-ignore-fix-8ca2dbb68 89cc83e842b92e8240645c85ef4b44f1ffa5f4316cb3e2fb2eb3223f61903c6c pivot-b200-20260717-launch-lock-a01# bf5e0a0c6c1dfcb9f93b7be289dd3c89 3000 2026-07-18T15:00:29Z 2461240.1253357 S3ResearchAgent verify_c8e3fd3707e72a4746ed partial_source interpretation Source supports the bounded interpretation but not every historical runtime detail. inconclusive 15cf9181190cfaa5ceb31375d26af951dc265942e73915429220ee8efe05a177 R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=15cf9181190cfaa5ceb31375d26af951dc265942e73915429220ee8efe05a177; adjudicated correction Preserved correction source. live-lock-ignore-fix-8ca2dbb68 89cc83e842b92e8240645c85ef4b44f1ffa5f4316cb3e2fb2eb3223f61903c6c pivot-b200-20260717-launch-lock-a01# fe1250f3625355724da14ab74b1b76e6