]> 2026-09-08T17:23:47+09:00 Lesson:pivot-b200-20260717-venv-launcher-identity-a01 3000 ko Applies to Python virtual environments, safe-path subprocesses, tmux launchers, and experiment runners that normalize executable paths. The runner converted the absolute .venv/bin/python launcher through Path.resolve() before spawning the calibration CLI. S3ResearchAgent medium Failed B200 migration bundle b200-2-generation-20260717-a01 at source commit 038c9cd00c25fc83678d4d698f8780bfc5d96369. 2026-07-17T07:42:28Z 2461238.8211574 Failed decision SHA-256 e1c0e98e2de2fd78fa21acd57aec899ea13f94ffc5707128f9ceb1d87c7ac7eb; child log SHA-256 6c3bc4bd550b39a5ef4657a339f45712448d9756cbf2e949a1210e52bdb75d94; no GPU compute process. The bytes of a venv launcher may be a symlink to the base interpreter, but the lexical launcher path is semantically required for Python to discover pyvenv.cfg and set sys.prefix. Resolving a venv launcher symlink discards virtual-environment identity Path resolution produced the base /usr/bin/python3.12 executable, so sys.prefix no longer identified the project .venv. The calibration CLI failed its venv guard 3.4 seconds after Qwen phase start, before any GPU compute process or generation artifact. Why did the safe-path calibration child reject the project venv even though the command named .venv/bin/python? lab Use an absolute but non-resolved <venv>/bin/python path for subprocess launch. Never resolve the launcher symlink; test sys.prefix or a real CLI guard under the exact safe-path/PYTHONPATH environment before GPU work. Draft 2026-07-18T15:00:30Z 2461240.1253472 2026-07-18T15:00:30Z 2461240.1253472 pivot-b200-20260717-venv-launcher-identity-a01 3000 Evidence:pivot-b200-venv-launcher-failed-bundle-a01 2026-07-17T07:42:47Z 2461238.8213773 S3ResearchAgent b200-2-generation-20260717-a01 decision.json and qwen/generation.log log The append-only bundle is status=failed/rejected_incomplete. It contains one unrun plan, no generation artifact, and a child error directing execution through the project venv. Immediate post-failure GPU process inventory was empty. not_recorded pivot-b200-20260717-venv-launcher-identity-a01# 9f73047f2b3a330b2d8952d75dd7bb1a 3000 Evidence:pivot-b200-venv-launcher-fix-a01 2026-07-17T07:47:12Z 2461238.8244444 S3ResearchAgent git commit fd7f9bdb5817c497996b6c44c233010a743cdb74 code Uses the absolute lexical .venv/bin/python path for both origin probe and generation child. Focused runner tests, pre-commit, a full 553,835,742-byte snapshot/import smoke, and the exact B200-2 safe-path calibration CLI help command passed. not_recorded pivot-b200-20260717-venv-launcher-identity-a01# 147172f3d9b73432d3b21bb45216e6cd 3000 2026-07-18T14:58:54Z 2461240.1242361 S3ResearchAgent verify_38cdfa5ddbbdb519f4d6 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-venv-launcher-failed-bundle-a01 a478edc04282b413a07731f18451eaaf10266e42c6e68d69f9a69dbaa4191d95 pivot-b200-20260717-venv-launcher-identity-a01# d94f1b22a5ff6e74243a8e4a4dfc562d 3000 2026-07-18T15:00:29Z 2461240.1253357 S3ResearchAgent verify_b120ae579c9df88c393c 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-venv-launcher-fix-a01 afada26169aa22f371f3936a28b19816d89df2ebfbe5c334595ede8a3909fbbf pivot-b200-20260717-venv-launcher-identity-a01# 9fd65a6ed662dd2f269b40af45e518b3 3000 2026-07-18T15:00:30Z 2461240.1253472 S3ResearchAgent verify_fccbbbfd2aba0cf058b1 partial_source observation,interpretation,reusable_lesson claim-bearing O/I/R coverage was not established; confidence forced to low inconclusive 151449c5a75150f78d3171a26099f37ac91d38937b1c4de11182a40128cf8a34 R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=151449c5a75150f78d3171a26099f37ac91d38937b1c4de11182a40128cf8a34; high-confidence adjudication ledger Patch supports the launcher fix; the failed a01 decision/log named in O is absent. Evidence:pivot-b200-venv-launcher-fix-a01 afada26169aa22f371f3936a28b19816d89df2ebfbe5c334595ede8a3909fbbf pivot-b200-20260717-venv-launcher-identity-a01# 152e3bddf9ed5104fe436effb5a817a1