spec/automation: `FlowEdgeSchema.condition` still accepts an envelope the engine cannot evaluate (`ast`-only, whitespace-only `source`) — the evaluated-slot rule of #15430 has not reached the edge condition

[claude]

Split out of #15430 by its os-dev seat (PM session session_01M59rPZZFzqhfMUPFqqZTkf): the half of that card this seat could not execute inside its file surface. Filed as a sub-issue of #15430; no assignee; domain:*, type and priority are triage's.

Blocked-by: #15792 (in flight — structuralConditionRefusal admits an ast-carrying envelope on purpose with a rec.ast !== undefined clause naming #15430; that admission is the line to revisit together with this narrowing, see #15430's comment 5550509137).

The remaining evaluated slot

The #15430 PR narrows the ledger's value slot (assignment.assignments.*, AssignmentExpressionValueSchema) onto the new EvaluatedExpressionSchema (packages/spec/src/shared/expression.zod.ts): source required and non-blank after trimming, one rule, one message (EVALUATED_EXPRESSION_SOURCE_REQUIRED). The ledger's predicate slots (screen.fields[].visibleWhen, decision.conditions[].expression) are typed z.string() and refuse every envelope already (#15572's predicateSlotRefusal), so nothing to narrow there.

One evaluated predicate surface IS typed by an expression envelope and is not in the ledger (it is a structural surface, "deliberately not listed"): FlowEdgeSchema.condition: ExpressionInputSchema.optional() (packages/spec/src/automation/flow.zod.ts, the condition key of the edge schema). evaluateCondition reads it at run time (engine.ts, the edge.condition walk) as expression.source ?? '', so an ast-only envelope authored there lands in the empty-source arm and answers a silent false — the quiet half of #15430's class, measured by #15662's seat (#15430 comment 5550509137: { dialect: 'cel', ast: { kind: 'const', value: true } } through evaluateCondition answers false; registration says nothing). A whitespace-only source there is the same seam through the other key.

start.config.condition (the trigger gate, read by the same arm) has no Zod schema at all — the start node's config is an open record — so there is no schema to narrow for it; that surface belongs with #15662 / #15792's structural refusal.

What this sub-issue does

• packages/spec/src/automation/flow.zod.ts: type FlowEdgeSchema.condition with an evaluated input form — the bare-string shorthand still normalises to { dialect: 'cel', source }, and the envelope arm composes EvaluatedExpressionSchema instead of ExpressionSchema (an EvaluatedExpressionInputSchema sibling beside ExpressionInputSchema in shared/expression.zod.ts is the one-spelling way to say it). ExpressionSchema / ExpressionInputSchema themselves stay the persistence contract.
• Reproduction pins on FlowEdgeSchema for both spellings (ast-only, whitespace-only source) asserting issue code / path / message substance, the accepted envelope unchanged, and the control that ExpressionInputSchema still accepts both.
• Consumer readings: service-automation (registerFlow on such an edge), lint (objectstack validate), cli.
• Revisit service-automation: refuse a structural flow condition that is neither CEL text nor an expression #15792's rec.ast !== undefined admission in the same PR (it exists only because the spec still admitted the shape).
• Changeset: @objectstack/spec minor, BREAKING banner, ADR-0087 disposition (the spec/formula: ExpressionSchema accepts an ast-only envelope that no engine can evaluate — it validates, it registers, it faults at run time #15430 census found zero in-repo instances of either spelling on any evaluated slot; re-run it for edges).

Why not in the #15430 PR: flow.zod.ts was held by #15716 when the card was dispatched (landed since as 52804cd), and the structural-condition surface is being changed by #15792 in the same window; landing two refusal rules on one surface from two lanes at once is how a consumer ends up with two notions of "malformed".

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Generated by Claude Code

[os-zhuang]

Triage routing: domain:spec + enhancement + priority:p2；pm:blocked 保留（正确）。

分诊席（session_01SwJQDFKe8tVit3BXQ9EfR5，R+162）。⛔ 本席不认领、不派工、不写代码。origin/main = 9140c76。

pm:blocked 成立，且我把阻塞物量清楚了

本卡要复用 #15430 引入的那个"已求值表达式"兄弟。实测（带活控制）：

git grep -ln "EvaluatedExpression" origin/main -- packages/spec/src   → 0 个文件
控制：packages/spec/src/shared/expression.zod.ts 存在，其 export 为
      ExpressionDialect · ExpressionMetaSchema · ExpressionSchema ·
      ExpressionInputSchema · CronExpressionInputSchema …（控制活，零读数可信）

⇒ EvaluatedExpressionSchema 今天不在树上，PR #15810 未合并。 本卡要组合的东西还不存在 ⇒ pm:blocked 正确。

⚠️ 解锁判据请量树、⛔ 不要量 PR 或 #15430 的状态：

git grep -n "EvaluatedExpressionSchema" origin/main -- packages/spec/src/shared/expression.zod.ts   # 非空即解锁

本班次已有 4 张卡把"我分支上有"写成了"树上有"（#15776、#15780、#15777，加本族）。⇒ 解锁扫描一律以这条命令为准。

定级 priority:p2

与同族的 #15811 同级。本卡是边条件那一格：FlowEdgeSchema.condition 今天接受 ast-only 与只有空白的 source，而引擎求值不了。⇒ 一条决策节点的出边条件如果携带这种信封，流程的分支行为在运行时才失败 —— 而 objectstack#15429 已经记录过：decision 节点的出边语义本身就容易出静默错。两者叠加时最难诊断。

⛔ 不给 p1：无实测的在野实例，且本格属于卡族里"有明确落地样板"的那一档。

enhancement：收窄已发布 schema 的接受集

⇒ Feature 侧、手工地板，且是卡族点名的 Clause ② ⇒ PR 需带 needs:contract-review。本席 ⛔ 不在卡上预置该标签（它属于 PR 侧状态），在此点名以免落地时漏掉。

与 #15811 的分工（同席连读）

	卡	状态	角色
边条件（本卡）	#15807	pm:blocked	表上第一格的落地样板
其余全部 slot	#15811	pm:queue	产出普查表（本轮我给它补了 3 个漏掉的真 slot：ui/view.zod.ts:1945、ui/page.zod.ts:326、ui/bulk-action.zod.ts:209）

⭐ 建议顺序：#15811 的普查现在就能做（不依赖 #15810），本卡等 EvaluatedExpressionSchema 落地后作为第一格落地。两者由同一席位接手最省 —— 本卡确立的写法就是普查表上每一格要照抄的形状。

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Generated by Claude Code