Appends the "R2" section to agents/steelbeak/work/queue-227/BUILD.md: findings and fixes,
no step failures past launchFixture, the environment and signal controls, the mutant table
(m6 on requireCitation survived and is a follow-up), run times and the tip check. One line
each in BUILD-LOG.md and docs/SESSIONS.md. Earlier sections are unchanged.
Remove the R1 slot-controller ties from the C2-14 fixture: the ROW227_CONTROL_ROOT
check, the native permit wait in bindLaunch, the fixture-cleanup.json write, the
priority.mjs preload and the owned-bwrap.sh override. The launcher uses its own bwrap.
The shell runs the driver from an explicit env -i environment (PATH, LANG, a sandbox
HOME, XDG dirs and TMPDIR, MOSAIC_CONFIG, no global git config) as its own process
group. On a signal the driver gets 3 s by the clock, then its group and any process
whose cwd is in the sandbox get SIGKILL, inside the landing gate's 5 s grace.
The fixture credentials are defined only in scripts/case2/fixture-credentials.mjs.
The new scripts/case2/leak-check.mjs reads them from there and never prints them.
Commits the row 227 evidence under agents/steelbeak/work/queue-227/: the remaining gate/ files, runs/ (first, corrected1, priorityprobe), target-packet, target-packet-r2, target-packet-r3, target-packet-r4, static/, and the two top-level manifests. Also commits BUILD.md and the append-only BUILD-LOG.md and docs/SESSIONS.md entries. The R4 packet hashes are PACKET.sha256 4eb60915b2144137df9b5a42afd0c5b266718d71de051fb8be53a27430a2cad4 and CURRENT-SOURCE.sha256 0cfd47c2073bc18a3ba7bff1ce6fdf39fe33a64b7fca209be71517b9feb89020, both checked against the files. The overlay bytes are committed in 4ac6f13bc. This commit adds receipts and packets only and records no scripts/test-case2.sh run on the R4 overlay.
Commits the 5 product paths and 7 gate helpers of the row 227 R4 source overlay on top of HEAD 5a0c801cb. scripts/case2/console.mjs is already committed at HEAD and is not part of this commit. The R4 independent review is sha256 6667baaa6af9d6d78a3ec7c64d9f3163ecbc350b94050f62899d9c01deabe002, verdict APPROVE source-only. Packet hashes: PACKET.sha256 4eb60915b2144137df9b5a42afd0c5b266718d71de051fb8be53a27430a2cad4, CURRENT-SOURCE.sha256 0cfd47c2073bc18a3ba7bff1ce6fdf39fe33a64b7fca209be71517b9feb89020. The 12 committed files match the review hash table, the applied overlay JSON (size, mode, hash) and the saved overlay tar. No scripts/test-case2.sh run exists on these bytes.
Source-candidate: poe d9a564e6d20f5f0fd75ce45b12cbbf8bb4c9d568\nSource-candidate: magica38ba5762b06716db1dee00d0afec162656488f5c\nValidated321whole-file phase plus whole bus1349/model-proxy100/webui490; final gate tooling checks pending, not landed.
jason.woltje
Steelbeak