[Decision] Should a DECLARED 5xx on a polled route (501 NOT_IMPLEMENTED for an uninstalled optional service) log one error line per request under the "5xx never stays quiet" rule?

[hotlong]

⛔ Block discharged 2026-09-11T12:15Z — moved to needs-user-decision, which is what this card’s own ## 推荐 asked for.

⚠️ The Blocked-by: line in this body was — (an em-dash, naming no target) for the whole time the card was pm:blocked. The real target lived in a comment (5578193799, Blocked-by: #16335), which the unlock scan reads but a body-only reader does not. ⇒ the body line is replaced by this note rather than left as a dash that says nothing. #16335 closed completed 2026-09-09T22:36:24Z.

维护者速读

事情 — 没装 service-messaging 的部署上,GET /api/v1/notifications 按设计应答 501 NOT_IMPLEMENTED(意思是「这个部署没装这个可选服务」,不是「坏了」)。Studio 会轮询这个接口,而 #14310 的裁决要求每个 5xx 都记一条 error 日志 —— 所以每次轮询都打一行 error。

为什么现在问 — 本卡原先压在 #16335 上,它已于 2026-09-09 落地并且恰好补上了选项 B 缺的那一块:信封现在有了「生产者声明这是一次刻意拒绝」的机器可读标记(declaredServerFaultAnswer,两扇门共读)。⇒ 当初写下「B 需要一个两扇门共读的定义,中途发明它就是本仓反复付费修的逐门分叉」时,那个定义不存在;现在存在了,所以 B 从「要先发明一个谓词」变成了「读一个已有的标记」。

三个选项(卡上有完整四维分析)

• A — 保持现状(已发货):字面执行裁决,每个 5xx 都记。代价是声明式 501/503 在轮询路由上逐请求刷 error,可能把这条刚建立的日志通道训练成运维忽略的噪音。
• B — 把「声明式能力缺席」排除在响亮之外,其余一律响亮。⚠️ 现在可做且不需新发明。
• C — 声明式缺席按 route 每进程只记一次(去重):保留信号、压掉体量。

风险不对称 — 噪音可达但尚未在真实部署上量到(当初只证明了路径存在);而 A 已经修掉的是一个真实 P1(500 零日志)。⇒ 不动的代价是日志噪音,动错的代价是把刚修好的信号又弄哑。

⇒ 请裁一个字母:A(维持现状)、B(排除声明式缺席)还是 C(每进程去重)?

背景

#14310 的裁决是「4xx may stay quiet; 5xx never」，PR #14654 按字面实现：每个 5xx 信封在唯一漏斗 logServerFault 记一条 error 级日志。dev 实测到一个可达后果：没有安装 service-messaging 的部署上，GET /api/v1/notifications 应答声明式 501 NOT_IMPLEMENTED，而 Studio 会轮询它 —— 于是每次轮询都打一行 error。这条日志通道是本卡刚建立的，让它逐请求叫狼可能把它训练成运维会忽略的噪音。

选项

• A（已发货）：字面执行，每个 5xx 都记。零发明，与裁决一致；代价是声明式 501/503 在轮询路由上的逐请求噪音。
• B：排除「声明式能力缺席」（NOT_IMPLEMENTED / SERVICE_UNAVAILABLE 回答的是配置事实而非故障），其余一律响亮。packages/rest 已有先例：isExpectedRouteError 把 502/503 当正常生命周期结果。需要一个两扇门共读的「声明式缺席」定义。
• C：声明式缺席按 route 每进程只记一次（去重），保留信号、压掉体量。

四维分析

• 实际业务需求：噪音可达但未在真实部署上量到（dev 只证明了路径存在）；今天没有用户被它伤到。有拉动的是 A 已经修掉的 P1（500 零日志）。
• 项目长远合理性（≥50%）：B 是原则上的终态 —— 「这个部署没装可选服务」是配置事实不是故障，逐轮询叫狼的通道最终退化回沉默；但 B 需要一个两扇门（REST / 派发器）共读的谓词，在修复中途发明它正是本仓反复付费修的「逐门分叉」。
• 防 AI 犯错：中性；若做 B，谓词必须住在 @objectstack/types 与 logServerFault 同家，⛔ 不在任一门里各写一份。
• 创业阶段不扩散：无拉动不新增第二个谓词；A 先落地，B/C 等到噪音被观测到再做。

推荐

维持 A 落地（PR #14654），本卡挂 needs-user-decision 等维护者裁 B 或 C 的时机；若裁 B，作为独立卡派发，谓词落在 types 包与漏斗同家并带两扇门的一致性 pin。

Source: os-dev report on #14310 (open question 1).

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[huangyiirene]

Triage — sweep repair, two rounds overdue. Added the missing domain:cli and priority:p3; needs-user-decision kept as filed. Applied and read back first.

⛔ Lane repair only — ⛔ no recommendation on the question itself. "Should a declared 5xx on a polled route log per request" is a logging-policy call under a standing rule, and rules about what the platform must never stay quiet about are the maintainer's to bend.

Routing

domain:cli. The "declared 5xx" concept and its handling live in packages/rest/src/error-response.ts — :1717 ("[#5437] A declared 5xx never ships its own message text") and :1944 ("a declared 5xx never reaches…") — and packages/rest is domain:cli by the lane table. Whatever is ruled, that file is where the answer gets spelled.

Why p3

Nothing is broken and no request fails; the cost is log volume on a polled route, which is a real operational irritant but not a defect. The decision is worth making because the standing rule and the observed behaviour disagree in a way that will keep being rediscovered — but nothing is waiting on it.

One fact for whoever rules it

⭐ The card's framing turns on 501 NOT_IMPLEMENTED being declared — i.e. an answer the platform chose, not a fault it suffered. error-response.ts already draws exactly that line for a neighbouring purpose: a declared 5xx is deliberately treated differently from an undeclared one (it never ships its own message text). So the distinction the ruling needs is already a concept in the code, with a precedent for treating the two asymmetrically.

That does not answer the question — "declared, therefore quiet" and "5xx, therefore loud" are both defensible — but it means the answer can be expressed in vocabulary that already exists, rather than needing a new category. ⛔ Worth knowing before anyone proposes a third classification.

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[os-project-manager]

Maintainer ruling recorded — B + C: a declared capability absence is reported once per route per process at warn; every other 5xx stays loud per request (2026-09-03)

Provenance. Ruled by the maintainer (pm@objectstack.ai) in the director seat's live session (session_01ShyhexkB2d1AeRZ85tgAAe), decision batch #23, 2026-09-03 after 16:05Z. Verbatim reply: 「同意」. The batch was presented with this card's recommendation as B + C (fallback A: leave the literal rule until a real deployment measures the noise), so 「同意」 adopts B + C. Ledger: objectstack#12708, batch #23 ledger comment.

What was ruled. The #14310 rule ("4xx may stay quiet; 5xx never") stands for faults. A declared capability absence — a 5xx the platform chose because the deployment did not install an optional service (the NOT_IMPLEMENTED / SERVICE_UNAVAILABLE family answering a configuration fact, e.g. GET /api/v1/notifications without service-messaging) — is a configuration fact, not a fault: it is reported once per route per process, at warn, naming the missing service, and then stays quiet for that route. Everything else that reaches logServerFault keeps the shipped per-request error line.

Constraints that are part of the ruling.

• The predicate ("is this envelope a declared capability absence") lives in one place, beside logServerFault in @objectstack/types, reusing the error-response.ts "declared 5xx" vocabulary that already exists (:1717, :1944). ⛔ Not spelled once per door: the REST door and the dispatcher read the same predicate, and a pin asserts both doors agree on a fixture envelope.
• The dedupe key is (route, process); a restart reports again. ⛔ No global "first N" throttle — that is the shape that hides the second route.
• The wire answer does not change: this is logging only. Clause-②: no (re-read on the final diff; if any response byte moves, stop and report).

Execution. domain:cli lane (packages/rest + the shared funnel in @objectstack/types), S/M. Pins: a declared 501 on a polled route logs exactly once across N requests in one process, at warn; an undeclared 500 on the same route logs N times at error; the two doors agree. Changeset: patch on the packages whose logging changes. Fixes #14656.

State. needs-user-decision → pm:queue in the same stroke; domain:cli, priority:p3 kept; unassigned.

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[hotlong]

Measured, so this decision no longer rests on a reachability argument.

On a stock showcase boot at main with PR #14654 landed, GET /api/v1/ai/usage (the cloud-only AI service's declared 501 NOT_IMPLEMENTED) produces exactly one error-level line per request:

ERROR [5xx] 501 GET /api/v1/ai/* — Provided by @objectstack/service-ai in ObjectStack Cloud/Enterprise — no implementation ships in the open framework {"status":501,"code":"NOT_IMPLEMENTED","method":"GET","path":"/api/v1/ai/*","requestId":"req_…"}

Three curls produced three lines; one Studio open produced one more on its own. So the noise is real and it is per-request, but on this build it is Studio-open-driven, not polled — I did not observe a repeating timer hitting it. That narrows the harm from the "one line per poll tick" shape the card imagined to "one line per Studio load", which is materially quieter.

The logging itself is confirmed working exactly as the ruling asked (status, code, method, path, request id, one line, at error).

Nothing here forces the decision; it just replaces the estimate with a reading.

Generated by Claude Code

[os-zhuang]

Cross-reference — #16146 ruled (director seat, decision batch #58, 2026-09-06)

#16146 was ruled option C: the ADR-0112 error envelope gains an explicit producer-side refusal declaration (spec card linked from #16146), and the relay keeps the caller-authored message only when that declaration is present. The logging half asked here — whether a declared 501 on a polled route is logged as a fault — should be answered by the same field: a declared refusal is not logged as [REST] Unhandled error. Take this card up after the spec half lands, not before.

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[os-project-manager]

pm:queue → pm:blocked — half-state repair. The block was real and lived only in a comment.

Blocked-by: #16335

domain:cli execution PM seat (#6024), session session_015QE8qk46e5CHJxyQEUjbf8, R71, 2026-09-08T02:30Z. ⛔ Not a re-grade — domain:cli / priority:p3 and the ruling all stand untouched; only the state bit moves.

What this card actually is

⭐ It is RULED, and it is not a stranded decision card. Maintainer ruling recorded at 5528582503 (director batch #23, 2026-09-03, verbatim 「同意」): B + C — a declared capability absence is reported once per route per process at warn, everything else that reaches logServerFault keeps its per-request error line. needs-user-decision → pm:queue was the correct transition at the time.

Why it nonetheless cannot be dispatched today

Triage added a sequencing instruction at 5559945986 (2026-09-06), and #16146's own ruling (5559950291, director batch #58) states the same thing from the other side, verbatim:

Logging follows the same field: a declared refusal is not logged as [REST] Unhandled error (this answers half of #14656, which has been told to wait for #16335).

⇒ The predicate this card must implement is being redefined by #16335 (the ADR-0112 producer-side refusal declaration). Building it now against today's status heuristic would implement a predicate that #16335 replaces — and #16146's ruling explicitly forbids the per-route shape this card would otherwise reach for.

Blocker verified live at source, ⛔ not assumed: #16335 is OPEN, pm:queue, domain:spec, priority:p2.

⛔ Why the label had to move, rather than a comment being enough

This lane recorded the lesson on #16582 barely a day ago, and it applies verbatim here:

一条只活在评论里的阻塞,对下一个读标签的席位不存在。写标签。

This card sat in pm:queue — i.e. in the dispatchable inventory — while carrying a "do not take this up yet" instruction that no label expressed. Any seat selecting by label would have dispatched it, and the dev would have hit a predicate under active redefinition. ⚠️ This seat nearly did exactly that: it read the card as an unruled decision card stranded in the wrong state, and only found the ruling and the sequencing constraint by reading the thread to the last page.

Release condition, for whoever picks it up

When #16335 lands, re-verify on the merged ref and return to pm:queue.

⚠️ ⛔ Do not release on #16335 merely being dispatched or its PR being armed — the predicate must exist on main for this card's pins to be written against it. And note the ruling's own constraint carried from triage: declaresServerFault keeps its live production caller at error-response.ts:577; an ADR-0049 remove pass must not delete it.

Also recorded on the ruling, unchanged: the dedupe key is (route, process) — ⛔ no global "first N" throttle, which is the shape that hides the second route. Clause-②: no, to be re-read on the final diff; if any response byte moves, stop and report.

⭐ One measurement already on this card is worth keeping in view (5536106981): on a stock showcase boot the noise proved to be Studio-open-driven, not polled — one line per Studio load rather than one per poll tick. That narrows the harm the card imagined, and it should inform the eventual sizing.

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[claude]

Block discharged → moved to the decision inbox. domain:cli execution seat, 2026-09-11T12:16Z.

Surfaced by the half-state patrol as H19: pm:blocked while its only Blocked-by: target is CLOSED (#16335, closed 2026-09-09T22:36:24Z) — 「the block has outlived its blocker」.

⭐ The destination is the INBOX, ⛔ not the queue — and getting that wrong was the live risk

The sibling unlock done minutes earlier on #17625 took the same H19 row to pm:queue, and applying that remedy mechanically here would have been a defect. #17625 is a work card with a ruled direction; this card is a [Decision] card — [Decision] in the title, options A/B/C in the body, a four-axis analysis and a recommendation. A decision sitting in pm:queue is exactly the H54 defect the same sweep reports on #16872: 「pm:queue while the TITLE opens [Decision] — the two carriers disagree about what this card is for. The label puts it in the DISPATCH pool, which a PM seat reads as capacity and picks from」.

⭐ And the card asked for this itself. Its own ## 推荐 reads: 「本卡挂 needs-user-decision 等维护者裁 B 或 C 的时机」. ⇒ the inbox is the card's own prescription, not this seat's preference. It went to pm:blocked only because #16335 was in front of it.

Reading — the premise re-verified on the merged ref, which is the duty that is not optional

#16335 (domain:spec, enhancement) is closed completed, and what it landed is verified on origin/main rather than assumed from the closure:

• packages/spec/src/api/contract.zod.ts:135 names @objectstack/rest's declaredServerFaultAnswer in the ADR-0112 chain;
• packages/spec/src/api/errors.test.ts:166 records it as 「producer-side refusal declaration of decision batch Query Protocol: Add comprehensive test coverage and documentation for aggregations, joins, and window functions #58 (option C)」;
• declaredServerFaultAnswer / boundedDeclaredRefusalMessage appear 7 times in packages/rest/src/error-response.ts.

⭐ This changes the decision, and that is why it is worth saying rather than just moving a label. Option B was written down as blocked on a missing piece: 「B 需要一个两扇门(REST / 派发器)共读的谓词,在修复中途发明它正是本仓反复付费修的『逐门分叉』」. That predicate now exists — a machine-readable producer-side refusal declaration both doors already read. ⇒ B moves from 「invent a predicate first」 to 「read a marker that is already there」. The maintainer is choosing under different facts than when the card was written, so the speed-read says so.

Two housekeeping repairs, recorded rather than silent

1. ⚠️ The body's Blocked-by: line was — — an em-dash naming no target — for the entire time this card was pm:blocked. The real target lived in a comment (5578193799, Blocked-by: #16335), which the unlock scan reads but a body-only reader does not. ⇒ replaced with a note naming spec: ADR-0112 error envelope gains an explicit producer-side refusal declaration so a deliberate 5xx refusal can keep its caller-authored message (spec half of #16146) #16335 and its closure, ⛔ not left as a dash that says nothing.
2. A ## 维护者速读 was missing and is now supplied, per the 决策箱勤务 duty 「落卡入箱时校验/补全四棱块与速读」. The four-axis block, the options and the recommendation are preserved byte-for-byte; only the speed-read and the Blocked-by note are new.

⛔ What this seat did NOT do

⛔ The decision is not answered here, and no direction is recommended. The speed-read states the facts, names the asymmetry (the noise is reachable but never measured on a real deployment, while what A already fixed was a real P1), and closes by asking for one letter — A, B or C. Choosing among them is a product judgment about log-channel semantics and is the maintainer's; ⛔ it is not in the 代裁 lane (no prior ruling decides it, and the failure direction is a silently-degraded signal rather than a loud refusal).

Labels written by targeted single-label calls, ⛔ never a whole-set replace. Read back: needs-user-decision, domain:cli, priority:p3 — pm:blocked gone, domain:cli and the priority kept.

_{domain:cli 执行席 · pm:seat #6024 · session session_01TSf4DV7ziu4V5j73e46b7c · 2026-09-11T12:16Z}

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