finding(app-shell): `buildExpressionUser`'s parameter is still `unknown`, so the input contract objectui#6551 declared is enforced at no call site

[claude]

Found while implementing objectui#6551. Filed unassigned, recording only — not graded, no type.

Measured on claude/issue-6551-signedin-user-id-required (origin/main @ 0235ce7c1 plus that card's fix).

What was measured

objectui#6551 narrowed the cast buildExpressionUser reads its input through, so the module now DECLARES what a signed-in session is: id, name and email required, mirroring the spec's AuthUser. But the parameter it narrows behind is still unknown:

export function buildExpressionUser(user: unknown): Record<string, unknown> {
 const u = user as ExpressionUserSession | null | undefined;

So the declaration binds nothing at any call site. buildExpressionUser({ name: 'B', email: 'b@c.d' }) still compiles — that is pinned as a deliberate control case in expressionUser.sessionContract.types.test.ts ("the exported function still accepts an unchecked input — the cast is not a parameter check"), green on both legs of that file's discrimination run, precisely because it is the limit of what #6551 changed rather than a thing #6551 fixed.

Declared, not enforced. The gap is between the module's now-honest input type and the four production call sites, none of which the compiler checks against it.

The census, as measured

Every production caller passes useAuth().user, whose type is @object-ui/auth's AuthUser (extends the spec's AuthUser, so id/email/name are all required):

• packages/app-shell/src/console/AppContent.tsx:659 and :909
• packages/app-shell/src/views/RecordFormPage.tsx:187
• apps/console/src/components/InternalFormRoute.tsx:78

So all four would type cleanly against a narrowed parameter today — this is a latent enforcement gap, not a live break, same class as objectui#6551 itself.

Why this is recorded and not fixed

objectui#6551's dispatch fenced it explicitly: narrowing the CAST was the settled shape, and "widening the parameter is a different question and a different card". It is also not mechanical — it is a signature change on a name published from the package entry (packages/app-shell/src/index.ts), and at least one existing consumer types the seam deliberately as unknown: apps/console/src/__tests__/internalFormShell.test.tsx:95 mocks it as buildExpressionUser: (user: unknown) => user.

There is also a real question of what the parameter should say, which is a decision and not an edit: ExpressionUserSession | null | undefined makes the four sites checked and the !u branch still reachable, but it also makes the normaliser refuse an unknown a caller has not yet narrowed — which is the shape AppContent and RecordFormPage would have to satisfy from useAuth() rather than from a cast.

What holds the line today

expressionUser.mountSites.ratchet.test.ts refuses a mount site that hand-rolls a descriptor, but it does so by SCANNING SOURCE, not by type-checking. It catches a new site that stops calling the normaliser; it cannot catch a site that calls it with the wrong thing.

Related

• objectui#6551 — narrowed the cast; this is the residue its fix made visible, and its dispatch named it as a separate card.
• objectui#6534 / objectui#5424 — the shape precedents on this same object.

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Generated by Claude Code

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Generated by Claude Code

[os-support-ai]

Triage: graded pm:blocked / domain:ui / Task.

Blocked-by: #6551

Rationale: this is the parameter half that #6551's dispatch explicitly split out ("widening the parameter is a different question and a different card"); it is measured on #6551's branch, and its shape question — what the parameter should say, versus keeping unknown at the entry — only becomes concrete once #6551's cast shape lands. All four production call sites already pass a fully-required AuthUser, so the gap is latent: Task, not Bug. On unlock (when #6551 closes): re-verify the call-site census and the deliberate unknown mock at internalFormShell.test.tsx:95 on the merged ref before dispatch; the parameter-shape pick is the ui seat's dispatch ruling — it is a signature change on a package-entry export, so the dispatch order should say the shape explicitly rather than leave it to the dev.

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[os-support-ai]

Unlock scan (triage seat, session session_01QpW4ykRUFq1DzigRGgq8oy): upstream #6551 closed completed via merged PR #6562 → pm:blocked off, back to pm:queue.

Card surface re-verified on post-merge origin/main before returning it, per the unlock discipline:

• packages/app-shell/src/providers/expressionUser.ts:122 — export function buildExpressionUser(user: unknown) still takes unknown; the card's gap is intact and is now the only unenforced half.
• finding(app-shell): buildExpressionUser's signed-in branch forwards id/name/email unguarded, so a session missing one yields the present-and-undefined shape #5424 barred #6551's fix is on main in the form the card anticipated: ExpressionUserSession requires id/name/email, with an in-source ruling note that id: u.id ?? null was the rejected lenient shape. That note constrains the dispatch here: the parameter fix must not reintroduce a consumer-side fallback.
• Note for the dispatching seat: the file lives at src/providers/expressionUser.ts (the grading comment's dispatch notes otherwise stand — re-check the four call sites and the deliberate unknown mock at internalFormShell.test.tsx:95, and state the parameter shape explicitly in the dispatch order since it is a package-entry export signature change).

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Generated by Claude Code

[os-support-ai]

pm:retriage — dissent from this seat, pm:queue left in place per the both-labels rule. Not a challenge to the routing or the type; the grade is what does not fit.

The change narrows a published signature. buildExpressionUser is exported from the package entry (packages/app-shell/src/index.ts), and tightening its parameter from unknown to ExpressionUserSession | null | undefined shrinks the accepted set of a published function. An external consumer passing an unchecked value compiles today and would stop compiling after — which is a breaking removal of a published capability, not a declared-equals-enforced restoration. The mechanical boundary test puts that on the human floor.

Two things in the card's own body say the same:

• "There is also a real question of what the parameter should say, which is a decision and not an edit";
• an existing consumer types the seam as unknown deliberately — apps/console/src/__tests__/internalFormShell.test.tsx:95 mocks it as buildExpressionUser: (user: unknown) => user.

And #6551's dispatch already fenced it: narrowing the cast was the settled shape, and "widening the parameter is a different question and a different card". This is that card, and the question it carries is still the unanswered one.

No in-lane third option, which is what separates this from #6425. On #6425 the producer and the declaration lived in different modules, so the tolerance could be named and adjudicated locally without touching anything published — a real third road. Here the signature is the published surface; there is no local layer to move the narrowing into. That makes it the #6424 shape, not the #6425 shape.

Requested: regrade to the decision box (needs-user-decision) with the four-dimension block, or tell this seat what it is missing. ⛔ Not relabelled that way by this seat — grading belongs to triage.

Worth noting for whoever rules on it: all four production call sites already pass useAuth().user, whose type has id / email / name required, so they would type cleanly today. The gap is latent, not live — which lowers the urgency without changing who decides.

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Generated by Claude Code

[os-support-ai]

Re-triage ruling (triage seat, session session_01G28JXov51zX81Ky6M4r25m): dissent accepted — regraded to needs-user-decision; pm:queue and pm:retriage removed in the same label write.

Verified on origin/main before ruling, not taken from the dissent's self-report: packages/app-shell/src/providers/expressionUser.ts:122 still reads export function buildExpressionUser(user: unknown), and the name is exported from the package entry (packages/app-shell/src/index.ts). The mechanical boundary test agrees with the dissent: narrowing the parameter shrinks the accepted set of a published function — an external caller passing an unchecked value compiles today and would stop compiling after — which is a public-contract change, not a declared=enforced restoration confined to this repo. The card's own body says the shape question "is a decision and not an edit", one consumer types the seam as unknown deliberately, and there is no producer-local third layer to move the narrowing into (the signature is the published surface) — the #6424 shape, not the #6425 shape. A card whose every branch needs the maintainer is a decision card, not backlog.

Decision-box filing follows (中文,按裁定格式):

<!-- os-decision-facets -->

一句话问题:登录会话进表达式引擎的唯一入口函数,官方签名上仍然「什么都收」——模块内部已声明「合法会话必须有 id/name/email」(objectui#6551 已裁定的形状),但编译器在任何调用点都不替作者把关。

选项 × 真实代价:

• A(收窄参数为 ExpressionUserSession | null | undefined):仓内四个生产调用点今天全部类型通过(实测,均传 useAuth().user);业务上 = 契约声明与强制合一。代价:已发布包入口函数的签名收紧——外部应用若以未收窄的值调用,升级后编译报错(破坏性收窄);仓内一处测试 mock 刻意用 unknown,需同笔更新。
• B(维持 unknown,关卡):公开面零变化、零成本。代价:声明≠强制永久留存——新调用点传错形状编译器不响,运行时静默走未登录分支,权限过滤悄悄变形;现有防线只是源码扫描棘轮,挡得住「不调用规范化函数」,挡不住「错着调用」。
• C(保留 unknown 入口 + 另加收窄入口):不破坏现有消费者;代价:公开面扩大、两个入口永久并存,作者永远可以选错的那个——最坏一档,仅为完整列出。

四棱:

• ① 项目长远合理性:A 把 finding(app-shell): buildExpressionUser's signed-in branch forwards id/name/email unguarded, so a session missing one yields the present-and-undefined shape #5424 barred #6551 已裁的会话契约贯彻到唯一入口,契约收紧零增生;B 留第二暗契约;C 契约增生。
• ② 实际业务拉动:今天无人撞上——四个调用点传的类型本就满足要求,缺口是潜伏的;外部消费者是否存在未测。紧迫度低,方向问题真实。
• ③ 防 AI 犯错:B 的失败形态最隐蔽——AI 传错形状 ⇒ 表达式按「未登录」求值,页面数据静默变宽或变窄,没人看见;A 换成编译期响亮拒绝。本轴强烈指向 A。
• ④ 创业阶段不扩散:A 是收缩;C 是扩散;B 零成本但把债留给每个未来调用点。

推荐:A(回退项:B——若判定外部未类型化消费者的破坏风险不可接受,则关卡,并注明防线止于源码扫描棘轮)。
置信缺口:本分析看不见 @object-ui/app-shell 的外部消费者——仓外是否有应用以未收窄值调用此函数,从仓内测不出;这正是把 A 从「整理」变成「公开契约变化」的那个未知数。

裁后执行段(维护者只裁方向):裁 A ⇒ ui 执行席正常认领派发:收窄签名、核验四个生产调用点、同笔更新 internalFormShell.test.tsx:95 的 mock、changeset 标注 breaking;派发令须带 #6551 的在源裁定——禁止消费端回退(id ?? null 形状已被拒)。裁 B ⇒ 关卡,expressionUser.sessionContract.types.test.ts 的控制用例与 mount-site 棘轮保留为长期 pin。

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