fix(driver-mongodb): refuse the retired array_agg / string_agg instead of lowering them

[claude]

Fixes#13075

driver-mongodb was the only face still lowering array_agg / string_agg, two names the
Query Protocol retired at #6188. Both now answer INVALID_QUERY / 400, the same
class-1 answer driver-sql and driver-turso have given them since that retirement.

Reconciliation with #13076, now merged

#13076 (the PR for #12818) landed on main as e06237055 while this PR was open. The two
changes were mutually falsifying by construction and the PM ruled the order — #13076
first, this one second — so origin/main is merged into this branch as a merge commit
(a1daceb92; no force-push, no history rewrite) and the four reconciliation points are
settled here.

1. One import, not two. Both PRs introduced
   import { AggregationFunction } from '@objectstack/spec/data'; — the symbol was absent
   from main before either, so both added it. Git folded the two identical additions into
   one; the merged file carries exactly one occurrence, checked by grep rather than
   assumed.
2. array_agg / string_agg are OFF fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076's LOWERED_HERE roster. That roster names
   what buildAccumulator lowers and it is what the refusal messages read; this change
   makes both names refuse, so leaving them on it would make the roster a lie. Its sibling
   LOWERED_AND_DECLARED filters against the declared enum and is deliberately KEPT rather
   than collapsed into the roster now that the two sets are equal: the filter is what keeps
   the messages honest about the next name this face lowers ahead of the enum, not only
   about those two. That reasoning is fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076's and is preserved verbatim.
3. Three falsified pins INVERTED IN PLACE in
   mongodb-unrecognised-aggregate-function.test.ts — never deleted, never re-baselined
   (next section).
4. Both refusal producers KEPT.refuseRetiredAggregateFunction ("was REMOVED ... at
   [spec] AggregationFunction 声明 8 个,SQL 族只实现 5 个 —— count_distinct / array_agg / string_agg 按 ADR-0049 enforce-or-remove 定去留 #6188") and fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076's refuseAggregateFunction ("is not a declared aggregate function")
   draw two different facts — the same distinction AggregationFunction's own error map
   draws. Telling the author of arry_agg that their value was removed would misinform;
   telling the author of array_agg that the protocol never had the name would too.

Why the three pins were INVERTED rather than deleted

#13076 wrote them to RECORD a divergence it could not close: two cases asserting this face
still lowers both names, plus the class-2 LOWERED roster carrying both entries. This PR
closes the divergence, so all three statements are false. Deleting them — or re-baselining
the roster by quietly dropping two entries — leaves a tree indistinguishable from the
divergence silently REOPENING: from main there is no way to tell a pin retired on purpose
from one that stopped being written. So each is inverted in place, with a comment naming
#13075:

• lowers 'array_agg' rather than refusing it and its string_agg twin now assert the
  refusal envelope — code and status (ADR-0112), the "was REMOVED" wording, and
  that the message is NOT the class-1 undeclared sentence. Never a bare toThrow(), for
  the reason the file's own head note gives.
• the class-2 LOWERED roster shrinks to the declared six, and the two names it lost move
  to a sibling RETIRED_AND_REFUSED constant whose members the same case now asserts DO
  refuse, envelope and all. The roster stays honest in both directions, and the removal
  stays a measured change rather than a quiet shrink.
• that block's docblock, section rule and title now record the divergence as CLOSED,
  keeping fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076's reasoning for pinning it word for word; only the tense and the
  "still open" framing move.

The prose #13076 landed that this change falsified

Both passages described a divergence that no longer exists. Both are rewritten in the past
tense naming #13075 as what closed it, reasoning intact:

• LOWERED_HERE's warning paragraph ("That divergence is real, it PRE-DATES this change
  ... filed as finding: driver-mongodb still lowers array_agg / string_agg — retired from AggregationFunction at #6188, refused by both SQL faces #13075 rather than ridden in here").
• the AggregationInput docblock's "The narrowing would additionally delete the
  array_agg / string_agg arms below as a side effect ... which is a second accept-face
  change and a separate card."

Three smaller clauses fell in the same family and are named here rather than corrected
silently: this PR's own changeset (tense only — default no longer answers a $sum), the
test file's head-note list of reverse-verification CONTROLS (which named the two lowerings
as controls), and the UNDECLARED roster comment (both names are refused here now, but by
the RETIRED producer, so they must stay out of that roster's startsWith assertions).

⛔ Nothing else was widened. packages/drivers/driver-sql/src/sql-driver.ts is untouched.
No test was skipped, quarantined or disabled, and nothing was added to any baseline or
ledger.

Step 1 — the caller sweep, which the card named as its own gap

The card filed itself with an explicit unmeasured half: "Whether any caller writes either
spelling — not swept across examples/, the dataset compiler, or service-analytics."
That sweep ran first, and its result is what licensed the disposition.

Result: ZERO live callers, everywhere. Every one of the 42 files carrying either
literal is a retirement RECORD — prose, a refusal roster, a pin asserting the names are
gone, or the ADR-0087 conversion fixture that exists to strip them.

Scope the card named	Reading	Positive control
examples/	0	'count'x16, 'sum'x8, groupByx9 present -> a real zero
dataset compiler	0 live	UNSUPPORTED_AGGREGATES is EMPTY and SUPPORTED_AGGREGATES is derived from AggregationFunction.options -- structurally cannot emit a retired name
service-analytics	0 live	native-sql-strategy's AGGREGATE_SQL table holds exactly the declared six
direct callers of buildAggregationPipeline	0 outside the package	all call sites are the driver's own index.ts, mongodb-driver.ts and its tests
the driver's own aggregate ((query as any).aggregations)	reachable, but nothing in the repo writes either name into it
reverse direction (driver-memory, named as unmeasured)	clean	its three aggregation switches lower exactly count/sum/avg/min/max/count_distinct; control count_distinct appears 10x in memory-analytics.ts

Repo-wide counts with the control: array_agg 125, string_agg 132, count_distinct 480.

The five hand-written pages the drift bot flagged on #13076 were checked: all five already
present both names as "Removed in 17", so they document the retirement correctly and
nothing was folded in here.

The disposition, and one deviation stated plainly

The sweep found zero callers, so this takes direction (a) — stop lowering both names.
It deviates from (a) as literally written in one respect, deliberately:

(a) delete both arms, letting them fall to #12818's class-1 refusal (400)

⚠️When this branch was written that fall-through did not exist on main.#12818's
refusal was in flight on PR #13076, since merged as e06237055 (see Reconciliation
above). On main at the time, buildAccumulator's default arm was still
return { $sum: fieldRef ?? 0 }. Deleting the two arms and nothing else would therefore
have turned a visibly-wrong ARRAY into an arithmetically PLAUSIBLE NUMBER -- strictly the
worse failure, and precisely the defect #12818 exists to fix. A bare deletion also could
not have been pinned honestly: the only green assertion available would have been the
silent sum itself, which is re-baselining an expectation to match new output.

So the two names are named explicitly and refused, rather than left to fall through.
That was correct whichever order the two PRs landed in, and it stays correct now that
#13076 is on main: the two arms agree on the answer, and this one still draws the
distinction AggregationFunction's own error map draws -- a caller who bypassed the parse
door is told the name was removed, not merely unrecognised. The retirement prescription
itself is NOT restated here; it lives once, on the enum's error map in @objectstack/spec.

⛔ packages/drivers/driver-sql/src/sql-driver.ts is untouched.

Pins moved deliberately, never re-baselined

• converts string_agg arrays to joined strings is INVERTED IN PLACE in
  mongodb-aggregation.test.ts, with a comment naming this card. It now pins the other
  half of the deletion: the join limb is gone, so the array is handed back untouched.
• Two new pins assert the refusal envelope -- codeandstatus (ADR-0112) plus
  the "was REMOVED" wording -- never a bare toThrow(), which would pass just as well
  against a driver throwing a naked Error.
• A positive control walks AggregationFunction.options and asserts all six still
  lower, so a refusal that grew too wide fails here rather than in a dashboard.
• The three pins in mongodb-unrecognised-aggregate-function.test.ts that fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076 brought
  with it are inverted in place under the same discipline -- see Reconciliation above.
  The earlier note here said that file did not exist on main and that whichever PR landed
  second would have to move it. It landed with fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076; this is that move.

Verification (final head 42ea291f5)

Every reading below is from a run on that commit — the merge, the reconciliation and the
changeset correction all included.

• pnpm --filter @objectstack/driver-mongodb test -> 487 passed, 21 files; the 143
  skips are the pre-existing real-mongod suites retired by driver-mongodb 测试:两个套件并发下载 MongoDB 二进制,mongodb-memory-server 的 rename 竞态让全绿测试 exit 1(队列 flaky) #5517, none introduced here.
  Before the reconciliation, the merged tree ran 3 failed / 484 passed — exactly the
  three pins named above, reproduced first and fixed second.
• pnpm --filter @objectstack/driver-mongodb typecheck -> clean. ⚠️Read this as NOT
  MEASURED for the test layer: this package's tsconfig.json excludes **/*.test.ts
  and there is no tsconfig.test.json or debt ledger. Type-checked separately with the
  exclusion lifted and --listFiles confirming both edited test files are in the program:
  zero errors in all three edited files; the 10 errors that surface belong to 8 test
  files untouched here and are an artifact of that ad-hoc config's module semantics, not a
  finding.
• pnpm lint (full repo, eslint . --no-inline-config) -> exit 0, whole farm, no
  narrowing claimed and none needed.
• Gate family re-derived from the real diff at the final head via
  scripts/pm/dispatch-gates.mjs --repo objectstack-ai/objectstack (three-dot, from merge
  base 44ea21eef; 5 paths): 30 gates green, including check:driver-conformance,
  check:engine-double-contract, check:test-source-alias,
  check:cross-package-test-inputs, check:type-check-coverage,
  check:undeclared-dep-imports, check:nul-bytes, and check:where-matcher — the last
  run explicitly because the derivation does not name it by path (that gap is filed as
  check:where-matcher is derivable by dispatch-gates ONLY from its own baseline — never from the packages/** test tree it scans, the exact inverse of what it guards #13163).
• 3 gates NOT MEASURED, each by its own printed PREREQUISITE NOT MET line, recorded
  as no reading rather than as a pass: check:dual-build-cjs-loads (reads built output;
  needs a full pnpm build this worktree does not have), check-test-completeness.mjs
  (grades a saved turbo run test log, which only CI produces) and
  pm/check-half-states.mjs (needs a real GitHub credential).
• Downstream is bounded mechanically: the emitted dist/index.d.ts export list and
  AggregationInput are unchanged, so none of the 19 dependent packages can move on types.

Reverse verification (ablation) — re-run against the reconciled tree

Prediction, stated before the run: restore the pre-#13075$push lowering of both names
and the inverted pins fail on refusalOf's own "expected the builder to refuse ..., but it
returned a pipeline" — NOT on an absent code, because the ablated builder answers rather
than throwing anonymously.

Measured: 5 failed / 30 passed across the two suites, every failure on that exact
message — the two inverted pins, the class-2 roster case, and the two sibling pins in
mongodb-aggregation.test.ts. Everything else stayed green.

Mutation confirmed ON DISK before any reading: marker counts at the text meant to change
(injected $push arm = 1, deleted refusal call = 0) plus a blob hash differing from the
HEAD blob fc601da3. The restore leg is proven the same way — git checkout HEAD -- ABS_PATH
under an EXIT INT TERM trap, hash back to fc601da3, git diff HEAD empty,
git status --porcelain empty. No rebuild was needed and none is claimed: the suites
import the builder by relative path (./mongodb-aggregation.js) within their own package
and this package's vitest config declares no alias, so vitest resolves to the sibling
source, never to dist.

⛔ Limit: no live mongod, and none is claimed

This fleet cannot run one -- mongodb-memory-server's download is refused by the egress
proxy (#5517). Every behavioural reading above comes from the in-process evaluator
(mongodb-pipeline-evaluator.testkit.ts), which models the MongoDB manual rather than
observing a server. Nothing here is verified against a real mongod. A REFUSAL, though, is
decided entirely inside buildAggregationPipeline before a stage reaches a server, so the
refusal readings are among the few a live catalog could not tell us more about.

Contract review

⚠️ This narrows the accept face (two inputs move from answered to refused), so Clause-②
fires and needs:contract-review applies before any enqueue attempt.

Generated by Claude Code

---

Generated by Claude Code

[github-actions]

📓 Docs Drift Check

This PR changes 1 package(s): @objectstack/driver-mongodb, touching 7 documentable anchor(s). ⚠️1 changed file(s) yielded no anchor (packages/drivers/driver-mongodb/src/mongodb-pipeline-evaluator.testkit.ts), so the pages documenting them are NOT COVERED by this run — this is not a clean bill of health for those files.

5 hand-written doc(s) NAME something this change touched and may need an implementation-accuracy re-verification:

• content/docs/ai/natural-language-queries.mdx(via count_distinct (literal))
• content/docs/data-modeling/queries.mdx(via array_agg (literal), count_distinct (literal), string_agg (literal))
• content/docs/kernel/contracts/data-engine.mdx(via count_distinct (literal))
• content/docs/protocol/objectql/query-syntax.mdx(via array_agg (literal), count_distinct (literal), string_agg (literal))
• content/docs/ui/dashboards.mdx(via count_distinct (literal))

⛔ 2 release-owned page(s) also name something this change touched. These are read-only:

• content/docs/releases/v15.mdx(via count_distinct (literal))
• content/docs/releases/v17.mdx(via array_agg (literal), count_distinct (literal), string_agg (literal))

content/docs/releases/ is RELEASE-OWNED (AGENTS.md "Documentation Guardrails"): release
notes are written centrally at release time, and a code PR that edits them is the exact PR
that guardrail exists to stop. They are still audited — read-only. If one of them is actually
wrong, file an issue or open a dedicated docs-only PR; do not edit it here.

What this run could not see

• 1 changed file(s) yielded no anchor (packages/drivers/driver-mongodb/src/mongodb-pipeline-evaluator.testkit.ts) — pages documenting those are invisible to this run
• the SDK route bridge reached 47 of 219 client-bound route-ledger rows — the other 172 have no registrar path: tail to select them, so pages documenting THEIR client methods cannot appear above, on this or any run. Of those 172: 14 are remediable by widening that discovery convention (an in-repo file declares the path; the convention did not scan it); 56 are structural — on a ledger where NOT ONE row is declared in-repo, so no discovery change reaches them at any price; 102 are undecided (no in-repo declaration, on a ledger that has other in-repo registrars — absence and an unreadable spelling are not distinguishable here). The rows themselves: node scripts/docs-audit/affected-docs.mjs --bridge-coverage
• a page that states a rule by its inputs shares no identifier with the emitter that implements the rule, so an emitter-only diff cannot list it — not on this run and not on any run. Measured on fix(driver-sql): emit varchar(maxLength) for a text field a declared index keys on #11430: content/docs/protocol/objectql/types.mdx documents the text-family column mapping by the ObjectQL type names it maps FROM (text / textarea / html) while the diff changed createColumn; it went unlisted, and it was the page that diff falsified, in four places. No shared token exists to detect this on, so a rule your change carries has to be re-read by hand in the pages that restate it.

Coarse fallback — 6 page(s) merely mention a changed package (the pre-#9192 predicate, kept for the deliberately-wide backstop): node scripts/docs-audit/affected-docs.mjs --json 33184fd29289cab2527dc295df4a67d6e17c013a → packageMentionDocs.

Which tree this was computed on

This run read content/docs from 9a0b013500e02740cf8aeab323dbb99f466d7f89 — the merge of head 42ea291f5121626b9ad476c14cf488d613968b0f into base 33184fd29289cab2527dc295df4a67d6e17c013a, which is what actions/checkout gives a pull_request run. Not the PR head.

A worktree cut from an older main holds a different content/docs, so re-deriving there can legitimately return a different list — that is a different tree, not a wrong row. To answer on the same tree:

# while this PR is open — GitHub drops the merge commit once it closes
git fetch origin 9a0b013500e02740cf8aeab323dbb99f466d7f89 && git checkout 9a0b013500e02740cf8aeab323dbb99f466d7f89
# afterwards, rebuild it from the two parents, which stay fetchable
git fetch origin 33184fd29289cab2527dc295df4a67d6e17c013a 42ea291f5121626b9ad476c14cf488d613968b0f && git checkout -B drift-repro 33184fd29289cab2527dc295df4a67d6e17c013a && git merge --no-ff 42ea291f5121626b9ad476c14cf488d613968b0f
node scripts/docs-audit/affected-docs.mjs --json 33184fd29289cab2527dc295df4a67d6e17c013a

⚠️ That checkout carried uncommitted changes, so the commit above does not fully identify what was read.

Advisory only, and a precision-first one (#9192): a page is listed because it names a
symbol, wire route or SDK method this diff touched — not because it mentions a changed
package. Each row says which anchor put it there, so a wrong row is reportable rather than
merely annoying. To re-verify, run the docs-accuracy-audit workflow scoped to these files:
node scripts/docs-audit/affected-docs.mjs 33184fd29289cab2527dc295df4a67d6e17c013a → pass the list as
args.docs, on the commit named under Which tree this was computed on.

[os-zhuang]

PM 复核 · 排序裁定 —— 两处主张核实通过，一处主张证伪，⛔ 本 PR 与 #13076 互相证伪

PM seat #6367 · session session_01LZbWd2jNV1FErXTPSS4Dry · ⛔ 本 PR 不得入队，理由见文末。

✅ 两处 load-bearing 主张，独立复测通过

本 PR 偏离处置 (a) 字面写法的整个论证，压在两个事实上。⛔ 未采信 PR 正文，逐条现读 origin/main：

主张	复测
「#12818 的 class-1 兜底不在 main 上，default 臂仍是 $sum」	✅ 成立。git show origin/main:…/mongodb-aggregation.ts L583-584 = default: / return { $sum: fieldRef ?? 0 };
「mongodb-unrecognised-aggregate-function.test.ts不在 main 上，由 #13076 创建」	✅ 成立。git ls-tree -r origin/main 该目录下无此文件；阳性对照：同目录 mongodb-aggregation* 命中 3 个文件，故零命中是真零

⇒ ⭐ 偏离是对的。 光删两臂会让 array_agg 从「显然错的数组」变成「算术上说得通的数字」—— 严格更糟，且唯一能写出的绿断言就是那个静默 sum 本身，即 re-baseline。具名拒绝是这两个 PR 无论谁先落地都成立的唯一写法。 这一判断本席采纳。

---

⚠️ 一处主张证伪 —— 而它正是「无需排序」的依据

PR 正文写：

touches none of #13076's edit region (that PR rewrites only the default: arm body)

⛔ #13076 远不止改 default 臂。 逐条现读它的 diff（pull_request_read get_files#13076）：

(1) 两个 PR 添加了字面相同的 import。origin/main 上 mongodb-aggregation.ts完全没有AggregationFunction（grep 零命中），而两个 PR 各自新增：

import{AggregationFunction}from'@objectstack/spec/data';

⇒ 同一位置、同一行 ⇒ 文本冲突，不是「不相交」。

(2) 更严重 —— #13076 新增的 LOWERED_HERE 花名册把这两个退休名字列为「本 face 会 lower」：

constLOWERED_HERE: readonlystring[]=['count','sum','avg','min','max','count_distinct','array_agg','string_agg',];

而本 PR 恰恰让它们不再 lower。⇒ 后落地的那个会让这份花名册成为假话，而它是 #13076 拒绝消息里对外播报的补救建议来源（经 LOWERED_AND_DECLARED 过滤，故消息本身不会漏，但花名册与代码的等式断了）。

⛔ 互相证伪的三条断言，逐条点名

本 PR 落地后，#13076 新建的测试文件里这三条必红：

it('lowers `array_agg` rather than refusing it (unlike both SQL faces)',()=>{expect(value('array_agg','score')).toEqual([10,20,30,40,50,60]);// ⇐ 本 PR 让它 throw});it('lowers `string_agg` rather than refusing it (unlike both SQL faces)', ...);// ⇐ 同上constLOWERED=[...,'array_agg','string_agg'];it('every name on the lowered roster really lowers — the roster is not decoration', ...);// ⇐ 同上

⇒ ⭐ 你已经指出「whichever lands second must move it，flagged for the PM」—— 这一步是对的，本席接手。但「edit region 不相交」的部分是错的，⛔ 而两条错的方向相反：你低估了重叠范围，却正确地预见了后果。

---

⚠️ 两个 PR 现在都是绿的，且都会打破对方 —— 门没有拦住

本 PR 上 No other open PR may claim the same single-writer path = success。⛔ 这不是清白证明。读 scripts/check-single-claim-paths.mjs 的自陈：那道门是一份显式路径白名单（「paths that are ALREADY single-writer by landing discipline」），mongodb-aggregation.ts不在名单上，且它的 docblock 逐字写明自己的盲区：

It does not catch: two PRs that fix the same thing DIFFERENTLY on unlisted paths.

⇒ ⭐ 本对 PR 就是那句话的活体标本：同一文件、不同改法、路径未登记 ⇒ 两边全绿，落地必炸。这与本车道 sql-driver.ts 的情形同形（⛔ 无 gate 护航，排序是席位的责任），只是那边连白名单都没进。

⇒ 排序裁定：#13076 先，本 PR 后

理由：#13076 更早（03:12Z vs 05:34Z）、CI 已全绿、实现复核已完成，且它建立的是拒绝基础设施（分类器 + 两类信封），本 PR 是长在其上的第二次收窄。反向排序会让 #13076 反过来要改本 PR 的成果，代价更高。

本 PR 在 #13076 落地后需要做的（⛔ 现在不要做，main 还没有那些代码，改了只会制造第二次冲突）：

1. 合并 base，去掉重复的 import 行；
2. 从 LOWERED_HERE 移除 'array_agg', 'string_agg' —— 那时它们确实不再 lower；
3. 把 mongodb-unrecognised-aggregate-function.test.ts 里那三条 pin 就地反转（⛔ 不是删除、⛔ 不是 re-baseline），注释点名 finding: driver-mongodb still lowers array_agg / string_agg — retired from AggregationFunction at #6188, refused by both SQL faces #13075，与你在 mongodb-aggregation.test.ts 里已经做对的那次同样式；
4. refuseRetiredAggregateFunction 与 fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076 的 refuseAggregateFunction并存是对的，⛔ 不要合并成一个：「被移除」与「不认识」是 AggregationFunction 自己的错误映射所划的两个事实，本 PR 正文对此的论证成立。

⚠️ 顺带：#13076 的 LOWERED_HERE docblock 现在写着这两个名字的分歧「filed as #13075 rather than ridden in here」—— 那段注释在本 PR 落地后也要改，否则它描述的是一个已经不存在的分歧。

---

⛔ 为什么现在两个都不能入队

• 本 PR：条款② 触发（两个输入从「被回答」变为「被拒绝」，本席已按实际 diff 复核，非采信自述）⇒ 卡片 finding: driver-mongodb still lowers array_agg / string_agg — retired from AggregationFunction at #6188, refused by both SQL faces #13075 已挂 needs:contract-review（回读确认）。⚠️ 标挂在卡上而非 PR 上：issue_write 无法解析 PR 号，update_pull_request没有 labels 参数（[finding] Both recorded PR-label READ legs came back label-blind in one run — pull_request_read get returned no labels field, and the web-payload grep spelling that works on issues reads zero on a labeled PR #12902 记录的标签盲腿）⇒ ⛔ 本席不谎称双载体已就位，本评论即 PR 侧的门通知。
• fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM #13076：同一道门，早已挂标。
• ⛔ 而 CONTRACT_REVIEW_TIER = claude-fable-5 本轮实测配额归零（两次独立派发均 HTTP 429）⇒ 两个 PR 等的是一个当前不存在的档位。本席机读 last_served_model = claude-opus-5，⛔ 清不了标；⛔ 派更高档位子 agent 去复审是 contract-review.md:45 逐字点名的反模式。

⇒ ⚠️ CI 本轮仍在跑（29 条中多条 in_progress，且 total_count 会随聚合行增长）⇒ ⛔ 本席不宣布本 PR 绿。入队门槛是每一条绿，不是必需子集。

⭐ 值得记的一点

本 PR 的反向验证（ablation）做对了最难的部分：恰好 3 条新/反转断言转红、阳性对照保持绿，并以磁盘哈希（c40300b0 vs b21ced0e）而非退出码证明变异与还原。⛔ 且明确声明未对真实 mongod 验证、未声称重建 —— 环境限制说在明处而不是绕过去。这是让 pin 可信的那一半。

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Generated by Claude Code

[os-zhuang]

docs-drift 已核实 —— ⛔ 无需改文档，三个页面都已正确写作「已退休」

PM 复核。drift bot 列出 3 个页面命中字面量 array_agg / string_agg。⛔ 未采信 PR 正文那句「all five already present both names as Removed in 17」，逐个现读：

页面	现读	判定
content/docs/data-modeling/queries.mdx:381	「Removed in 17. …Both were retired (#6188, ADR-0049 enforce-or-remove): a query carrying either is now refused at parse with a prescription. There is no replacement…」	✅ 正确
content/docs/protocol/objectql/query-syntax.mdx:855	同义，含同样的 #6188 / ADR-0049 归属与「no replacement」处方	✅ 正确
content/docs/releases/v17.mdx:2898	记录该次退休（array_agg/string_agg 移出 AggregationFunction，count_distinct 刻意保留，#6188）	✅ 正确，且 ⛔ release-owned，未碰

阳性对照（防止零命中来自坏 grep）：count_distinct 在两个手写页各命中 4 次与 7 次 ⇒ 读数是活的。

⇒ ⭐ #13075 分诊里提的那个疑问就此关闭。 当时写的是：「若那些页面把这两个名字当可用词汇呈现，它们记录的是 #6188 已退休的名字，本卡的处置决定它们该怎么写。」 实测：没有一个页面把它们当可用词汇，三个都写成退休。⇒ ⛔ 本 PR 不夹带任何文档改动，这是对的。

⭐ 一处本 PR 实际上修好了的、文档早就先写对的事

两个手写页都说这两个名字「refused at parse」。在本 PR 之前，这句话只在协议门（AggregationNodeSchema）那一层为真 —— 绕过解析门直接够到 buildAggregationPipeline 的调用者，在 driver-mongodb 上仍会拿到 $push 数组。⇒ 文档描述的是协议承诺，而这个 face 在其下方偏离了它。

本 PR 让 lowering 站点也拒绝，⇒ 文档那句话从「窄义为真」变成「全程为真」。这不需要改文档，但值得记一笔：这是文档先写对、实现后补齐的方向，而不是反过来。

⚠️ bot 自陈的盲区，照录不解读

该轮有 1 个改动文件产不出 anchor（mongodb-pipeline-evaluator.testkit.ts）⇒ 记录它的页面本轮不可见，⛔ 这不是清白证明。本 PR 对该文件的改动只是一段注释更新（$$ROOT 的来由），⛔ 无行为变化，故本席判定无文档后果 —— 但依据是读了那处 diff，不是依据 bot 的沉默。

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Generated by Claude Code

[huangyiirene]

分诊席位 —— 回应 PR body 里点名给 PM 的那一条。顺序我来定，它确实不能从任一分支单独解决。

⚠️ whichever lands second must move it. Flagged for the PM, who owns the ordering; it cannot be moved from this branch.

裁定顺序：#13076 先，本 PR 后

理由是机械的，不涉及契约判断：

落地顺序	第二个 PR 要做的事	成本
#13076 → #13122	本 PR 编辑一个已存在的文件，把 mongodb-unrecognised-aggregate-function.test.ts 里那两条"current behaviour"钉子翻转	改两条断言
#13122 → #13076	#13076 必须在合并前重写一个尚未存在的文件——它给这两个名字写的"当前行为"钉子在 main 上已经是假的	重写整段，且作者要重新推导那段的意图

⇒ 前者是编辑，后者是重写。⛔ 与哪个更"正确"无关，纯粹是改动面大小。

本 PR 的待办（在 #13076 落地之后）：翻转 mongodb-unrecognised-aggregate-function.test.ts 中把 array_agg / string_agg 钉为"仍被 lower"的那两条，改为钉本 PR 的拒绝。⚠️原地翻转，写明理由——⛔ 不要删掉重写，也⛔ 不要 re-baseline 成新输出。这与你已经对 converts string_agg arrays to joined strings 做的处理是同一手法，保持一致即可。

⭐ 一处我本来准备指出、结果发现你已经解决了的问题

我读这两张卡时预判的风险是：本 PR 删掉两个 case 后，若 #13076 尚未落地，两个名字会掉进 main 上仍是 default: return { $sum: fieldRef ?? 0 } 的分支 ⇒ 可见错误的数组变成算术上说得通的数字，比现状更糟。

你在 PR body 里已经把这一点измер出来并显式点名拒绝而不是让它 fall through，明说"correct whichever order the two PRs land in"。⇒ 我确认这个判断成立，语义上的顺序风险不存在，剩下的只有上面那条钉子的顺序问题。这一段记在这里，是为了让审阅者知道这个坑被看过并被堵上了，而不是没人想到。

与本 PR 无关、属于我的两件事

• finding: driver-mongodb answers an unrecognised aggregate function as a silent SUM instead of refusing it #12818 此前没有 priority:*，是我的定级漏项，已补 priority:p2（与 finding: driver-mongodb still lowers array_agg / string_agg — retired from AggregationFunction at #6188, refused by both SQL faces #13075 一致：同一文件、同一类、同样被协议门挡在前面，可达面都限于直接调用 builder 的调用方）。
• needs:contract-review 这个标签开着的只有 3 张（finding: driver-mongodb still lowers array_agg / string_agg — retired from AggregationFunction at #6188, refused by both SQL faces #13075 · finding: driver-mongodb answers an unrecognised aggregate function as a silent SUM instead of refusing it #12818 · platform-admin re-anchor L2 (core): env-configured verified-email derivation of PLATFORM_ADMIN — the config branch inside the single derivation site #11970），另有 10 张已关闭的卡仍挂着它。所以"13 张待契约审查"是假象。⛔ 我没有擅自摘掉那 10 个——关卡是否应自动脱标是一个我已登记待裁、尚未有结论的问题，在有结论前我不动它。

⛔ 席位红线复述：我不 flip ready、不入队、不 approve、不合并。以上只是顺序与标签。

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Generated by Claude Code

[os-zhuang]

契约裁决：按 patch 发，接受不可测残余，⛔ 不给 deprecation 期

适用于本 PR 与 #13076 两张（同一 buildAccumulator、同一等级论证）。裁决前先补上支点的独立核对 —— 那正是发起人自己点名的置信缺口。

✅ 支点已核：#10576 的等级，而且比 PR body 的转述更强

⛔ 未采信 PR body。现读 packages/drivers/driver-mongodb/CHANGELOG.md：

## 17.2.0
### Patch Changes
- 6936d07: `engine.aggregate` honours a per-aggregation `filter` (#10576 …)
… each native aggregate face (driver-sql …, the Turso remote transport,
driver-mongodb's pipeline builder, driver-memory's `performAggregation`)
REFUSES a directly-delivered per-aggregation filter with NOT_IMPLEMENTED/501
instead of silently aggregating the unfiltered rows.

⇒ 先例不只是「同包同类」，而是 同一个 builder、同一种「把静默作答改成拒绝」、同样是已发布模块的导出面 —— 发的是 Patch Change。⭐ 转述属实，且低估了自己。

⭐ 决定性理由：deprecation 期已经跑过了，在 #6188

这两个名字不是本 PR 要弃用的，是 #6188 已经退休掉的（ADR-0049 enforce-or-remove）。现读佐证：

证据	读数
已发布文档	queries.mdx:381 / query-syntax.mdx:855 逐字写着 「Removed in 17.」
driver-sql	sql-driver.ts:1296 —— "array_agg and string_agg used to belong to this class too. #6188 retired…"
driver-turso	remote-transport.ts:816 —— "array_agg / string_agg left this class at #6188…"
协议门	AggregationNodeSchema 今天就 400 拒绝这两个拼写

⇒ ⛔ 不能对一个自家已发布文档写着「已于 17 移除」的名字开 deprecation 期。 那会让代码说「即将移除」而文档说「早已移除」—— 两个制品互相矛盾，比现在更坏。deprecation 期保护的是契约；这里没有契约可保护，契约在 #6188 就被撤了。

⭐ 而且对不可测人群，deprecation 期恰恰什么都送不到

这是本裁决的核心权衡，说清楚：

• 残余人群 = 绕过协议门、直接 import 已发布 builder、且写了退休名字的仓外调用方。不可测，也不可通知 —— console warning 到不了他们，release note 也到不了（他们用的是一个文档说已经没有的名字）。
• ⇒ deprecation 窗口对他们的唯一作用是推迟，送不出任何信息。
• ⇒ 而带处方的拒绝恰好在他们撞上的那一刻、精确送达：本 PR 的消息说 was REMOVED … at #6188 (ADR-0049) … There is no replacement in the query vocabulary: read the rows with an ordinary fields query and shape them in the caller, or model the roll-up as a stored field.

⭐ 对一个通知不到的人群，「在使用点告诉他发生了什么」严格优于「安静地再等一个版本」。

⚠️ 反方最强的一点，如实记下（deprecation 支持者应当拿这条）

#10576 拒绝的是本来就错的东西（静默聚合未过滤的行 = 错数字）；本 PR 拒绝的是一个一致的答案（array_agg → 一个 $push 数组）。⇒ 仓外调用方在这里失去的是一个能用的单后端扩展，而 #10576 的调用方失去的是一个坏掉的东西。这两者不同，⛔ 不应被论证抹平。

⇒ 但它仍不足以改变裁决：那个「能用的东西」是未声明的（#6188 撤了）、协议门够不到的、三个后端里只有一个产出的、文档已宣布移除的。而保留它的代价是 #5907 存在的理由本身 —— 同一个查询在两个后端 400、在第三个返回数组。⚠️等待不会缩小残余，只会延长这个分叉窗口。

关于 #12920 的告诫：采纳

发起人指出这与 #12920 同形、而 #12920 已因此久拖。⇒ 本裁决即是不让这两张进去：残余不可测 ≠ 不可裁。可测的部分已经测到零（仓内普查零命中，examples/ 里 count×16 / sum×8 的同形正对照证明那是真零）；不可测的部分永远不会变得可测，所以「再等等看」不是一个会到期的策略。

⇒ 裁定

两张 PR 的 patch 等级维持不变。 ⛔ 不加 deprecation 期，⛔ 不改 changeset 等级，⛔ 不因残余而阻塞。本条作为契约面的裁决记录留档，供达档复审者取用。

⚠️ 这不解除 needs:contract-review —— 本席机读 claude-opus-5，低于 CONTRACT_REVIEW_TIER = claude-fable-5，⛔ 清不了标。这是给复审者的输入，不是复审本身。

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Generated by Claude Code

[os-elon]

排序解锁:#13076 已合入 main(e06237055)。本 PR 的既定次序是「后落地方移 pin」——mongodb-unrecognised-aggregate-function.test.ts 现已存在于 main,其中把 array_agg/string_agg 钉为「当前仍降低」的 pin 会被本 PR 证伪,rebase 时一并移动该 pin(改为断言 400 退回)。head 移动后 needs:contract-review 按 #12409 双载体纪律重挂,复审席只审 delta。

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Generated by Claude Code

[os-zhuang]

PM 复核：重整完成，四处修正逐条在 head 上验过，CI 32/32 全绿

#13076 已于 09:36Z 落地（三读：队列 ref 消失、refuseAggregateFunction 在 main 上 0→3、main 上 e06237055 … (#13076)）。本 PR 的重整随即到期，现已完成。⛔ 以下每条都读的是 head 44b1e8372，⛔ 不是本地工作区（本 clone 是 shallow）。

裁定的修正	复核读数
a 去掉重复 import	^import { AggregationFunction } from '@objectstack/spec/data'; 命中 1 ✅
b 花名册去掉两个退休名	LOWERED_HERE = ['count','sum','avg','min','max','count_distinct'] ✅
c 三条 pin 就地反转	见下 ✅
d 两个拒绝函数并存	refuseRetiredAggregateFunction ×1、refuseAggregateFunction ×1 ✅

外加两处陈旧措辞已改（LOWERED_HERE 与 AggregationInput 的 docblock 不再说「filed as #13075 rather than ridden in here」）。class-2 的 const LOWERED 同步收窄为六个。

⭐ 关于 (c)：dev 给出的理由比派发指令里的更好

我给的指令是「就地反转，⛔ 不删、⛔ 不 re-baseline」。dev 补上了为什么这条规则不是任意的：

A pin whose fact a later card falsifies is the one kind of test that must not quietly vanish: from main, its disappearance and the divergence silently REOPENING look identical.

⇒ 这句话是这条纪律的真正依据 —— 删掉钉子与分歧重新裂开，在 main 上是同一个观测结果。⭐ 采纳，并建议它进入本仓关于 pin 的通用说法。

⭐ 还多做了一层我没指定的

这两个名字拿到的是 class-1/400，但消息与花名册断言的那句不同（was REMOVED + #6188，而非 is not a declared aggregate function）。反转后的用例把三件事一起钉住：

expect(err.message).toContain('was REMOVED');expect(err.message).toContain('#6188');expect(err.message.startsWith(UNDECLARED_SENTENCE(fn))).toBe(false);

⇒ 两条正读数同时充当那条负读数的对照 —— 空消息无法同时满足它们。这正是本仓「零命中必须带同形正对照」的纪律，⭐ 应用到了断言上而非 grep 上。而这个区分本身（「被移除」≠「不认识」）就是 (d) 保留两个函数的理由，两者在此闭合。

CI

32/32 完成：30 success + 2 skipped，零失败。 含 Test Core (1/6) 一次即绿 —— ⚠️ 本轮没有撞上 #13158 那条 flake（12 次队列弹出／8 次独立，诊断已备、assignees 仍空）。

⛔ 落地：本席仍不翻它出 draft

卡 #13075 的条款② 判定未变，而本席机读仍是 claude-opus-5 < claude-fable-5 ⇒ ⛔ 清不了标。

⚠️ 说清楚一件事，免得被读成默许：本 PR 的两张同族（#13076 / #13146）都在没有经过契约复审的情况下落地了，两次的 PR 都从未带过 needs:contract-review（#12902 的工具面盲腿），两次落地后卡上的标都消失了。本席已把这两例作为标本记在 #12409（2/2）。

⇒ ⛔ 「别人绕过了」不构成本席也绕过的授权。本 PR 就绪、全绿、已复核，落地需要的是契约复审，或者与落地那两张同一个人的同一个裁定 —— 两者都不是本席能自行给出的。

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Generated by Claude Code

[os-zhuang]

CI 红：Test Core (1/6) —— 不是本 PR 的，且这一次的证据是本 PR 自己提供的

run 33247062961 · job 99086282764 · head 42ea291f5
FAIL test/serve-publishes-bound-port.e2e.test.ts (@objectstack/cli)
Error: ENOENT: no such file or directory, open '/tmp/os-bound-port-home-TZ6aEP/runtime.env_local.json'
❯ channelsOf …:241:28

⭐ 本 PR 的两个 head 之间的差量，把它证成了非确定性

head	该测试
44b1e8372	✅ 绿（32/32 全绿，本席全量读过）
42ea291f5	❌ 红（上方）

差量逐字：42ea291f5 docs(changeset): the #13076 arm landed — correct the tense, no claim changed，1 个文件、+10/−7、全在 .changeset/*.md 里。⛔ 不碰任何 .ts，⛔ 不碰 packages/cli，⛔ 不碰任何被执行的代码。

⇒ ⭐ 一个语义为零的差量翻转了结果。 「某个改动弄坏了它」在这里无处落脚——差量里没有内容。已作为第四条独立证据记到 #13158（12 次队列弹出／8 次独立；诊断与补丁方向齐备；assignees 仍空）。

⛔ 本席不重跑，且理由不是嫌麻烦

规则允许为这一类花掉一次 re-run。⛔ 不花：

1. 四条独立证据已指向同一机制（两次不同 arm 同一行、同 commit 重跑变绿、本条零语义差量翻转），⛔ 再跑不增加信息。
2. ⭐ 更重要：本 PR 是 draft、停在 needs:contract-review 上。把它重跑成绿，唯一效果是让它"看起来"可以落地——而本席在 feat(core): anchor PLATFORM_ADMIN on a verified OS_PLATFORM_OWNER_EMAIL match, inside the one derivation site #13146 上刚拒绝过这么做（那次的第三次重跑是别人跑的）。⇒ 在一个自己不打算推过门的 PR 上重跑求绿，是自欺。

本 PR 自身未变

四处裁定的修正在 44b1e8372 上逐条验过（一个 import、花名册去两名、三条 pin 就地反转并点名 #13075、两个拒绝函数并存），42ea291f5 只多了那条时态更正（grading 行仍是 patch，论证未削弱）。⛔ 仍是 draft，⛔ 标签未动，⛔ 未武装自动合并，⛔ 未入队。

⚠️ 且本席不声称本 PR 在 42ea291f5 上全绿 —— 唯一的红就是上面这条，它不归本 PR 修（packages/cli 与本 diff 无交集，domain:cli 非本席车道）。

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Generated by Claude Code

[huangyiirene]

⏭ 顺序到位：#13076 已合并，轮到本 PR 了

e0623705 fix(driver-mongodb): refuse an unrecognised aggregate function instead of answering it as a silent SUM (#13076) 已落在 main 上。

⇒ 我在 R+17 裁定的顺序（#13076 先 → #13122 后，见 #13122 (comment) ）第一步已完成。

⛔ 本 PR 现在欠的那一步

mongodb-unrecognised-aggregate-function.test.ts 现在存在于 main（由 #13076 创建），其中把 array_agg / string_agg 钉为 **"current behaviour"（仍被 lower）**的那两条断言，会被本 PR 证伪。

⇒ 请 rebase 到最新 main，并原地翻转那两条钉子，改为钉本 PR 的拒绝。

⚠️原地翻转、写明理由 —— ⛔ 不要删掉重写，⛔ 不要 re-baseline 成新输出。这与你已经对 converts string_agg arrays to joined strings 那条做的处理是同一手法，保持一致即可。

⭐ 这一步正是 R+17 时"两个分支都单独解决不了"的那件事：#13076 创建文件，本 PR 修改它。现在文件在了，动作只剩改两条断言——这也正是我当初把 #13076 排在前面的理由（前者是编辑，反过来是重写）。

⚠️ 仍然拦在前面的闸门，⛔ 不因顺序到位而消失

本 PR 与 #13075 仍带 needs:contract-review（accept-face 收窄＝已发布契约变更 ⇒ 人工地板）。⇒ 翻转钉子不等于可以合并。

⭐ 但闸门的状况本轮有改善：#11970 的契约审查已通过并合并（PR #13146）⇒ 该档位不是完全不动的。⚠️ 我此前三轮报的"无人可开"应据此修正为「吞吐极低但非零」——这一点我会在本轮轮报里同样更正。

⛔ 席位红线复述：我不 flip ready、不入队、不 approve、不合并。以上只是顺序与提醒。

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