record(QWEN38-27B-BF16-GATE): the HOST rebooted on the benchmark day, and the boot time is derived rather than observed - #1423
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… and the boot TIME is derived rather than observed (#915) The spec carried one question as owed: whether the host rebooted or only the k3s pod was lost when the c8 vLLM worker died on 2026-08-19. An `rc run` job on `dgx:gpu0` (`97cf3e63-e4a4-4506-bde7-f19f19be3bbf`) settles it. `/proc/sys/kernel/random/boot_id` read `64c495a3-8c9c-4b20-8496-a97efda0e332` against the benchmark's `3fd9745a-d25a-426c-ba3c-97c958a85515`. That identity is kernel-wide and regenerated per boot, so the machine rebooted and no pod restart, container teardown or `k3s` restart can produce that value. Two claims of different strength land, and every surface keeps them apart. The reboot is OBSERVED. The ~10:42Z boot time is DERIVED from `UPTIME_S=38868` read inside the `rc` worker, so it holds only if that worker does not virtualize `/proc` — `lxcfs` virtualizes `/proc/uptime` and cannot touch `boot_id`, which is exactly why the first half does not inherit the caveat. The read instant is itself known only to about half a minute, so the derived boot is an interval of 10:41:47-10:42:14Z rather than a timestamp. It falls inside the c8 window, 17 minutes after the server answered `/health` and 16 after the last memory sample. That the reboot KILLED the worker is NOT claimed. The timing, the recorded 9,738 to 6,261 MB descent and this box's documented habit of rebooting instead of OOM-killing are all consistent with it, and consistency is not a trace. It hardens the campaign's watchdog conclusion instead of softening it: a userspace sampler dies with the kernel, so there is no floor and no cadence at which it reports this event, which is a harder statement than "2 seconds is too coarse". No number moves. The c8 denominator is still NOT MEASURABLE, the c1 pairing is still `PAIRING_VERDICT=DISCARD`, and no ratio is derived or restored from either; the finding explains the shape of the absence rather than filling it. `.agents/environment.md` gains the fleet-shaped half, because the two reboot bullets it already carries are a `ctest -j 4` and an oracle LOAD, and this one happened after the server was healthy and serving-ready. It also records why `boot_id` is the only instrument a leased job has: a pod has no `uptime` reset and no `journalctl --list-boots` to read. `docs/STATUS.md` and `docs/BENCHMARKS.md` both published the open question, so both are owed. `scripts/check-doc-checkpoint.py --staged` proves it rather than assuming it: with the two surfaces dropped from the index it exits 1 naming them, and exits 0 with them. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…nd re-apply the boot_id edit (#915) `origin/main` moved to 7265cea while this branch was in review, and two of the new commits touch the same three keyed records this branch edits: `.agents/benchmark-record.md`, `docs/STATUS.md` and `docs/BENCHMARKS.md`. `git merge` reported a clean automatic three-way on all three. AGENTS.md §Records forbids accepting that result for a keyed record, so it was discarded. Each of the three was reset to the complete `origin/main` version with `git checkout origin/main -- <path>`, verified byte-identical to the target branch (`git diff --quiet origin/main -- <path>` for each), and the scoped edit was then re-applied from a patch cut against this branch's own base (`git diff 96ed834 7f2cc3a09`). It applied at offsets +45, +1 and +12 lines with no fuzz. The verification is that `git diff origin/main` over the three files now contains exactly the four hunks of that patch, with identical context, added and removed lines, and nothing else. Every key this branch does not own is therefore byte-for-byte the target-branch version, because the only delta from the target branch IS the scoped edit. `.agents/environment.md` and `.agents/specs/qwen38-27b-bf16-gate.md` were not touched by either incoming commit, so no reconciliation was owed for them. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…oot is not tied to the worker (#915) A fresh review returned FAIL on the boot_id record. The epistemics were right in the abstract and wrong in seven concrete strings: causation was disclaimed in three places and then asserted in four, and the derived read-instant interval pointed the wrong way. CAUSATION. `.agents/specs/qwen38-27b-bf16-gate.md` said in its headline that the worker loss "is now known to have been a HOST REBOOT", while its own `## Outcome` said "NOT established: that the reboot killed the worker". `boot_id` observes that a reboot happened somewhere in an ~11.2 h span. It does not observe that the worker loss WAS that reboot. `.agents/benchmark-record.md` said the settled reboot makes the c8-denominator watchdog conclusion "stronger", which needs the same untraced link; the watchdog claim is now scoped to the REBOOT CLASS, where a userspace sampler dying with the kernel is true on its own and needs no link. `docs/STATUS.md` disclaimed the causation and then wrote "no sampling watchdog could have caught it" one clause later. Each is restated at observed strength. THE BOUND. `bootid.log`'s mtime is when its FINAL line (`MemAvailable_MB`) landed, so `UPTIME_S` was read strictly before it. 21:29:35 was therefore an UPPER bound on the read instant, not a midpoint, and 21:30:02 is later still. Both endpoints of the recorded 10:41:47-10:42:14Z interval sit at or after the true read instant, so the interval excluded the whole region the value occupies. Re-derived: 38868 s is 10:47:48, and 21:29:35.606816Z minus that is 10:41:47.606816Z. The honest form is one-sided — the boot is at or before 10:41:47.6Z, with no lower bound stated, because one would have to come from when the probe started rather than from the log's content. The "no tighter figure is honest/supportable" sentences are deleted: a tighter upper bound exists and the lower bound is unbounded, so they were wrong in both directions. THE 11:26 ROW. It was recorded as `11:26:00`, "the job's last write". The actual mtimes are 11:26:32.079517600 (`job.log`) and 11:26:32.079047100 (`vllm-server-c8.log`), 0.47 ms apart, which is one bulk event and not a job writing. No content in `out/vllm-20260819T095758Z/` is later than 10:25:07 or 10:25:26. The two readings are incompatible and neither is established, so the row now carries a strength column reading `mtime only`. A second discrepancy is surfaced rather than resolved: the only `journalctl --list-boots` downtime this repository has measured on this box is ~3m40s, which applied here puts the box going down around 10:38, thirteen minutes after every writer had stopped. SMALLER. "During the untimed warmup" now modifies the worker LOSS, which is what it is true of, and not "came back up". The `environment.md` heading no longer states derived content at observed strength. `docs/BENCHMARKS.md` was the one surface of five that labelled the strength without stating the condition, and now states it. The read-back block is verbatim, sha256 25b88023, including the two `rc:` lines and the full `VERDICT=` line. The `lxcfs` caveat gains the argument that a container-scoped `/proc/uptime` would read the pod's age, and 10.8 h is not one; the caveat stands. The cross-clock skew between the local log mtime and `dgx`'s timestamps is stated as unpinned and unquantified. The owed item now proposes an `rc`-run `journalctl --list-boots`, which the lease can actually see, instead of "a host boot known independently", which it cannot. No number moves. The c8 denominator is still NOT MEASURABLE, the c1 pairing is still `PAIRING_VERDICT=DISCARD`, no ratio is derived or restored, and the observed half is not weakened: a kernel reboot did happen and it was not a lost pod. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…md` whole and re-apply the scoped edit (#915) `origin/main` moved again during the repair, to 727efb3, and that commit edits `.agents/environment.md` — the fifth of the five records this branch touches, and the one the previous merge did not have to reconcile. The same rule applies, so the same procedure was used. `git merge` reported a clean automatic three-way, and AGENTS.md §Records forbids accepting that for a keyed record. The file was reset to the complete `origin/main` version, verified byte-identical to it, and the scoped edit re-applied from a patch cut against this branch's base (`git diff 96ed834 HEAD -- .agents/environment.md`). One hunk, applied at offset +4 lines with no fuzz. Verified the same way as before: `git diff origin/main` over all five records now contains exactly seven hunks, every one of them inside the #915 region, with content byte-identical to the scoped patches. The incoming SGLANG-ORACLE-LEASE-WHEEL paragraph at line 190 is present unmodified, and no other file in the tree differs from the target branch. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…STATUS.md` whole, and pin the SHA this time (#915) `origin/main` advanced again while this branch was in review. Two of its new commits, `7dec1d990` and `1e1e9b1f0` (both ENG-CUDAGRAPH-BREAK), edit two of the five records this branch touches: `.agents/environment.md` and `docs/STATUS.md`. The other three — `.agents/benchmark-record.md`, `.agents/specs/qwen38-27b-bf16-gate.md` and `docs/BENCHMARKS.md` — were checked rather than assumed: their blobs are byte-identical between `727efb39c` and the target, so nothing was owed for them. `git merge` reported a clean automatic three-way on both contested files, and AGENTS.md §Records forbids accepting that for a keyed record. Each was reset to the complete target version, verified byte-identical to it, and the scoped edit re-applied from a patch cut between two immutable SHAs, `727efb39c` and this branch's head. One hunk each, `docs/STATUS.md` at offset +7 lines, no fuzz. The target is PINNED to a SHA rather than named as `origin/main`, because the first attempt at this merge was verified against a ref that moved under it. A concurrent session fetched `a68e6e408` into the shared refs mid-merge, so `git diff --cached origin/main` compared a `1e1e9b1f0`-based merge index against a newer commit and reported twenty files differing when only five did. That merge was aborted rather than reasoned around, the working tree was verified back to its committed state file by file, and the whole procedure was redone against the literal SHA. `a68e6e408` touches none of the five records, so the contested set is unchanged. Verification against the pinned SHA: exactly five paths in the tree differ from it, carrying seven hunks, every one inside the #915 region, and the two contested files' diff is byte-identical in content to the scoped patch. Every key this branch does not own is therefore the target-branch version. The incoming `A BUILD CAN DO IT TOO` bullet for `thor:gpu0`, the SGLANG-ORACLE-LEASE-WHEEL paragraph and the `#1380 is FIXED` paragraph are all present unmodified. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…the host boot list, and this record says it cannot (#915) Reconciling `## Owed` against what landed on `main` in the same file exposed a contradiction this branch introduced two commits ago. The owed item said the derived boot time retires "in one `rc` job that runs `journalctl --list-boots` on the host". The `boot_id` bullet in `.agents/environment.md`, added by this same branch, says the opposite 250 lines earlier: a lease gives you a pod, and `uptime` resetting and `journalctl --list-boots` are host instruments a pod does not have. That is the whole reason `boot_id` was the instrument used here. An owed item that assumes away the constraint the record was written to state is not a cheaper retirement, it is the same gap wearing a plan. The item now names the boot list as the thing that settles both halves — it prints the boot's own down and up timestamps in the host's clock, needing neither `/proc/uptime` nor an independently known boot — and then says plainly that whether a LEASED job can reach it is unestablished. The job is therefore to try it and record whether it answers, with `/proc/uptime` beside `date -u` in the same run so the virtualization question falls out either way. If the lease cannot read the boot list, the item needs host access and stays owed. The follow-on bullet about the two open discrepancies inherits the same conditional. `.agents/environment.md` on `main` now carries a `thor:gpu0` bullet for the 2026-08-19 build reboot (#1380) that reaches the same instrument from the other side and leaves the same access question open. It is a different device, a different failure and a different section, so it neither duplicates nor contradicts the `dgx:gpu0` bullet here — the two converge on one instrument, and the owed item now says so, because one job that answers the access question discharges part of both. Checked and not changed: `docs/STATUS.md` measures 75 long paragraphs, 44 oversized cells and 11 h2 sections against a ratchet of exactly 75/44/11, using the checker's own `_prose_paragraphs`. It measured the same at `727efb39c`, before the other session's edit, and the same at the pinned target. Neither that change nor this one moved it, and the ratchet is untouched. There is zero headroom on all three keys. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: claude:claude-opus-5 [Claude Code]
…ole and re-apply the scoped edit (#915) FOLLOWING_AGENTS_PROTOCOL origin/main advanced to c805ccb while this row was in review, touching three of the five records it edits: .agents/benchmark-record.md, docs/BENCHMARKS.md and docs/STATUS.md. §Records forbids accepting an automatic three-way merge of a keyed record, so the clean automatic result was discarded for all three, the target's version taken whole, and the scoped edit re-applied from a patch cut between two immutable SHAs rather than against a moving ref. Verified by comparing the staged tree against the pinned target over the whole repository: the only files that differ are the five this row owns, so every key it does not own is byte-for-byte the target's version. The incoming W0e content survives in all three contested files. Following-Agents-Protocol: true AI-Assisted: true Assisted-by: AGENT:claude-opus-5 [Claude Code]
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Two commits, #1425 and #1423, neither touching this row's product code. `.agents/benchmark-record.md` auto-merged, and an automatic three-way merge of a keyed record is not something to accept on trust, so the result was verified by key: 369 keys, every one byte-identical to exactly one side's version, none a blended result. Only one key moved at all, `BENCH-QWEN38-27B-BF16 c1/c8 RE-MEASURE`, edited by the target branch and untouched here. The first attempt at this merge died with `update-index died of signal 7` while git was taking an autostash. Nothing was left behind -- no MERGE_HEAD, HEAD unmoved, tree clean -- and it succeeded with `merge.autoStash=false` once the preflight run sharing this worktree had stopped. Recorded because a repo-global stash reached across worktrees is a failure this project has paid for before, and `git stash list` here holds nine entries belonging to other sessions. FOLLOWING_AGENTS_PROTOCOL Following-Agents-Protocol: true AI-Assisted: true Assisted-by: AGENT:claude-opus-5 [claude-code]
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.agents/specs/qwen38-27b-bf16-gate.mdcarried an open question under## Owed: when the c8 vLLM worker died on 2026-08-19, did the HOST reboot or was only the k3s pod lost? The artifacts could not tell, and the recorded way to settle it was to read/proc/sys/kernel/random/boot_idinside a laterdgx:gpu0job.That measurement is taken.
rcjob97cf3e63-e4a4-4506-bde7-f19f19be3bbfreportedBOOT_ID_NOW=64c495a3-…against the benchmark's3fd9745a-….Two claims, deliberately at different strengths
OBSERVED, and certain. A kernel reboot happened.
boot_idis kernel-wide and regenerated per boot; it changed. A pod restart, container teardown ork3srestart cannot produce that. The disjunction is retired: it was not merely a lost pod.DERIVED, and conditional.
UPTIME_S=38868was read from/proc/uptimeinside the leased worker, so it is the host's only if that worker does not virtualize/proc.lxcfsvirtualizes/proc/uptimeand cannot touchboot_id, which is exactly why the observed half does not inherit the caveat. Every surface that states the timing states the condition beside it.The bound is one-sided:
21:29:35.606816Z − 10:47:48 = 10:41:47.6Z, and that mtime is when the log's final line landed, soUPTIME_Swas read strictly before it. An earlier draft recorded an interval[10:41:47, 10:42:14]and called the narrowing a rigor improvement; it was wrong in both directions, because a tighter upper bound exists and no lower bound was measured at all. It now reads at or before 2026-08-19T10:41:47.6Z.What is NOT claimed
That the reboot killed the worker. Timing, the recorded 9,738 → 6,261 MB descent and this box's documented reboot-instead-of-OOM habit are all consistent with it. Consistency is not a trace.
Two discrepancies are recorded open rather than resolved:
11:26timeline row is a file mtime, not liveness. No content anywhere inout/vllm-20260819T095758Z/is later than10:25:07;job.logandvllm-server-c8.logcarry mtimes 0.47 ms apart, which is one bulk event, not two processes writing. The timeline now carries a Strength column and that row readsmtime only..agents/environment.md:875records a prior reboot on this box with ajournalctl --list-bootspair of ~3m40s downtime. Applied here, a10:41:47boot puts the box going down ~10:38— thirteen minutes after every writer stopped. That does not fit a simple crash-at-10:25:28story.What it does sharpen
The watchdog conclusion, scoped correctly. A userspace sampler dies with the kernel, so there is no floor and no cadence at which it reports a reboot — a harder statement than "2 s is too coarse". It is scoped to the reboot class, not to the c8 denominator, because strengthening that specific conclusion would require the causal link that is not established.
.agents/environment.mdgains a bullet: the two reboots this file already records for this machine are actest -j 4and an oracle load, both pre-/health. This one is post-/healthunder vLLM's production graphed configuration, so "survived startup" is not a safe state.The c8 denominator remains
NOT MEASURABLEand the c1 pairing remainsPAIRING_VERDICT=DISCARD. This finding explains the shape of that absence; it does not fill it, and no ratio is derived or restored.Keyed-record merge
origin/mainadvanced toc805ccbb3mid-review, touching three of the five records. Per §Records the clean automatic three-way was discarded for all three, the target's version taken whole, and the scoped edit re-applied from a patch cut between two immutable SHAs. Verified by comparing the staged tree against the pinned target over the whole repository: the only differing files are the five this row owns, so every unowned key is byte-for-byte the target's. The incoming W0e content survives in all three.Records only — no product code, no threshold, no lifecycle state moved.
Checkers, real exit codes, unpiped, on
c805ccbb3..HEAD:check-commit-trailers0,check-commit-style0,check-doc-checkpoint0,check-now-current0,check-issue-index-append-only0,check-agent-record0,check-public-doc-tables0,check-env-doc0,check-symbol-anchors0,check-pr-size0.agent-preflight.sh's sole red istest_cpu_x86_llamacpp_floor(#618), controlled against an unmodified clone of the pinned target at the same load: base rc=1 with 2 failures, this head rc=1 with 1 — base-red under identical conditions, and this change touches five markdown records and no code.Refs #915.
FOLLOWING_AGENTS_PROTOCOL
Following-Agents-Protocol: true
AI-Assisted: true
Assisted-by: AGENT:claude-opus-5 [Claude Code]