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UPDATE.md § sessions root: the adoption loop waits a busy write.lock out and never leaves a half-armed root (r242 → r243) #31

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caoer115 wants to merge 0 commits from agent/237686e8-r243-adopt-wait into main

caoer115 commented

2026-10-16 20:28:43 +00:00

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Branch agent/237686e8-r243-adopt-wait off M5 d014ceea, one commit 789e829, one file: UPDATE.md § sessions root — the owner's adoption block and the sentence after it. Nothing else in the block changes; § sessions root is lock-unpinned and UPDATE.md is not a tooling file.

Why. r242 (GATE: block, results/rounds/r242.md): the owner's step runs right after the reinstall, inside the first seconds of the daemon it just started; the engine takes .meridian/write.lock LOCK_NB while it primes, and mrd arm refuses busy with "transient; retry" and no wait (meridian-rs crates/mrd/src/arm_cmd.rs open_session). Three arms in a row were refused (027 re-arm, 028, 030 first arm); the root was left with 027 drifted and 030 unarmed, mrd rules rc 1, every gated birth refused armed_drift. r240's same step had one refusal (010, already armed) and landed by timing. Advisor ruling: decisions/r234-install-update-ruling.md § r242, option (c).

What the block does now (the advisor's condition 1): a busy-refused mrd arm is re-run every 0.5 s for up to 10 s and the wait is printed (adopt: <id> waited out a busy .meridian/write.lock: N refusal(s), 0.5 s each); a refusal that persists stops the loop at that door, names it and says to re-run the block — re-running is idempotent (an armed door reads unchanged). The root is never left half-armed silently. round-host.sh's awk still extracts the block whole (14 lines), bash -n clean.

Proof (condition 2) on the kept r242 VM ucc-round-r242-1958 as zitao2 — results/rounds/r242/diag/adopt-wait-proof/proof-run-1.txt (the block as run: adopt-step-fixed.sh, the driver: proof-adopt-wait.sh beside it):

P1, the failed root as r242 left it (027 armed=block(drifted), 030 armed=-): the block re-arms 027 at 501078c5b6d04f9e, arms 030, waits out one busy refusal on 035 (1 refusal(s), 0.5 s each), adopt-rc=0, mrd rules rc 0 (11 rows, no red), a record born after it through the face as zitao2 carries actor: 1039402f / principal: zitao2 / grade: asserted (triple 3/3).
P2.1–P2.3, the failed root restored from its snapshot, install.sh --floor 4 --from <the v3 stage> as the harness runs it (the daemon restarts: pids 17922, 20952, 24001), the block at once: 027 re-armed, 030 armed, adopt-rc=0, mrd-rules-rc=0, triple 3/3 each time.

Next (condition 3): merge → M6; release-candidate → M6 on the leader's go; Desktop r243 then VM r243 --public --public-branch release-candidate, every stage, zero waivers. Both r242 VMs destroyed and the r242 scope ended after this proof.

Branch `agent/237686e8-r243-adopt-wait` off M5 `d014ceea`, one commit `789e829`, one file: `UPDATE.md` § sessions root — the owner's adoption block and the sentence after it. Nothing else in the block changes; § sessions root is lock-unpinned and `UPDATE.md` is not a tooling file. **Why.** r242 (`GATE: block`, `results/rounds/r242.md`): the owner's step runs right after the reinstall, inside the first seconds of the daemon it just started; the engine takes `.meridian/write.lock` LOCK_NB while it primes, and `mrd arm` refuses busy with "transient; retry" and no wait (meridian-rs `crates/mrd/src/arm_cmd.rs` `open_session`). Three arms in a row were refused (027 re-arm, 028, 030 first arm); the root was left with 027 drifted and 030 unarmed, `mrd rules` rc 1, every gated birth refused `armed_drift`. r240's same step had one refusal (010, already armed) and landed by timing. Advisor ruling: `decisions/r234-install-update-ruling.md` § r242, option (c). **What the block does now** (the advisor's condition 1): a busy-refused `mrd arm` is re-run every 0.5 s for up to 10 s and the wait is printed (`adopt: <id> waited out a busy .meridian/write.lock: N refusal(s), 0.5 s each`); a refusal that persists stops the loop at that door, names it and says to re-run the block — re-running is idempotent (an armed door reads `unchanged`). The root is never left half-armed silently. `round-host.sh`'s awk still extracts the block whole (14 lines), `bash -n` clean. **Proof** (condition 2) on the kept r242 VM `ucc-round-r242-1958` as zitao2 — `results/rounds/r242/diag/adopt-wait-proof/proof-run-1.txt` (the block as run: `adopt-step-fixed.sh`, the driver: `proof-adopt-wait.sh` beside it): - P1, the failed root as r242 left it (027 `armed=block(drifted)`, 030 `armed=-`): the block re-arms 027 at `501078c5b6d04f9e`, arms 030, waits out one busy refusal on 035 (`1 refusal(s), 0.5 s each`), `adopt-rc=0`, `mrd rules` rc 0 (11 rows, no red), a record born after it through the face as zitao2 carries `actor: 1039402f / principal: zitao2 / grade: asserted` (triple 3/3). - P2.1–P2.3, the failed root restored from its snapshot, `install.sh --floor 4 --from <the v3 stage>` as the harness runs it (the daemon restarts: pids 17922, 20952, 24001), the block at once: 027 re-armed, 030 armed, `adopt-rc=0`, `mrd-rules-rc=0`, triple 3/3 each time. **Next** (condition 3): merge → M6; `release-candidate` → M6 on the leader's go; Desktop r243 then VM r243 `--public --public-branch release-candidate`, every stage, zero waivers. Both r242 VMs destroyed and the r242 scope ended after this proof.

caoer115 added 1 commit

2026-10-16 20:28:43 +00:00

UPDATE.md § sessions root: the adoption loop waits a busy .meridian/write.lock out and stops at the first persisting refusal 789e8297ba

The owner's step runs right after the reinstall, inside the first seconds of
the daemon it just started; the engine takes .meridian/write.lock LOCK_NB
while it primes, and `mrd arm` refuses busy with "transient; retry" and no
wait (meridian-rs crates/mrd/src/arm_cmd.rs open_session). On round r242
three arms in a row were refused (027 re-arm, 028, 030 first arm) and the
root was left with 027 drifted and 030 unarmed, mrd rules rc 1, every gated
birth refused armed_drift; on r240 one arm (already armed) was refused and
the step landed by timing.

The loop now re-runs a busy-refused arm every 0.5 s for up to 10 s and says
so; a refusal that persists stops the loop at that door, names it and says to
re-run the block (idempotent: an armed door reads unchanged) — the root is
never left half-armed silently. The prose after the block says the same.
Nothing else in the block changes; § sessions root is lock-unpinned and
UPDATE.md is not a tooling file.

Proven on the kept r242 VM as zitao2 (13-16-ucc-rearchitecture
results/rounds/r242/diag/adopt-wait-proof/proof-run-1.txt): on the failed
root the block re-arms 027 and arms 030, mrd rules rc 0, a birth after it
carries actor/principal/grade (one busy refusal on 035 waited out); three
times restore-the-failed-root -> reinstall (daemon restart) -> the block at
once: rc 0, triple 3/3 each.

Advisor ruling: decisions/r234-install-update-ruling.md § r242, option (c).
Round record: results/rounds/r242.md.

caoer115 referenced this pull request from a commit

2026-10-16 21:26:34 +00:00

Merge ucc branch agent/e6841e1d-r244-e2-order (5167cd9): rounds — the E2 prompt chains its calls so a seat cannot batch them; the recorder probe waits for the restarted daemon; E2-refusal reads the slug teaching

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