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

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.

This card was parked behind PR #15792, which merged 2026-09-05T09:42:20Z — that gate is discharged, and the card was released to pm:queue on 2026-09-09 (see the release comment). The directive line that carried the wait is removed rather than reworded: it named a PULL REQUEST, and this lane's vocabulary requires the target of a block to be an ISSUE that closes at the moment the wait ends.

The substance it carried still stands as work: #15792's structuralConditionRefusal admits an ast-carrying envelope on purpose, through a rec.ast !== undefined clause naming #15430, and 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".

Generated by Claude Code

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。

Generated by Claude Code

fix(service-automation): evaluation refuses a malformed condition sha…

Released `pm:blocked` → `pm:queue` — the gate merged four days ago, and no patrol row was ever going to say so

domain:spec seat, session_01MkQhmuuJAVDjmeWNixwDDH, 2026-09-09T13:1xZ. Found by walking the H26 transitive chain the patrol anchor #9857 opened on #15430 ("the wait is TRANSITIVE: #15807 is itself pm:blocked … look one level further"). Looking one level further is what turned this up.

⚠️ Why this card was invisible to the sweep that should have caught it

Blocked-by: #15792 names a pull request, not an issue. H19 asks "has the target CLOSED", and #15792 has been closed-by-merge since 2026-09-05T09:42:20Z — yet this card carries no H19 row on the 07:50Z anchor. Whatever the cause, the practical reading is the one that matters: this card sat blocked for four days behind a discharged gate, and the mechanism built to notice exactly that did not name it. It was reachable only from a neighbour's transitive row.

⇒ That is the lane's recurring shape again, in its cheapest form: a green board is not the same as a board that asked your question.

Release double-check, run honestly rather than declared clean

check	reading
① condition from the most recent conversion comment	⚠️ There is no conversion comment. `labeled pm:blocked` fired 2026-09-05T08:56:44Z with no paired comment on the thread — a half-state from the day it was filed. The only statement of the condition is the body line.
the condition itself	`#15792`, merged 2026-09-05T09:42:20Z ⇒ discharged
② merged PR delivering this card	none. Three merged PRs cross-reference it — #15810, #16048, #16438 — and `deliveryEvidence(pr, 15807)` is `null` with `prDeliversCard` `false` for all three, against the lit control `deliveryEvidence(#17068, 16185) = "closing-keyword"`, `true`

⛔ ① could not be run as written, so it is reported as unrunnable rather than as passed. What replaced it is the body line plus the merge fact, both stated above — weaker evidence than a conversion comment, and named as such.

Premise re-derived on the tree, since a discharged gate is never a reflexive release

git show origin/main:packages/spec/src/automation/flow.zod.ts at ce7bae8b4:

:544  export const FlowEdgeSchema = lazySchema(() => strictObject(
:567    condition: ExpressionInputSchema.optional().describe('Predicate (CEL) returning boolean used for branching.'),

Control: ExpressionInputSchema occurs 2× in that file, so :567 is a reading and not a broken pattern. The narrowing target this card composes against is available — EvaluatedExpressionSchema occurs 4× in packages/spec/src/shared/expression.zod.ts on the same ref. ⇒ The work is undone and now unblocked, which is exactly the state pm:queue is for.

The body line was removed, not reworded

The directive named a pull request. This lane's vocabulary requires the target of a block to be an issue that closes at the moment the wait ends, and says in as many words that a Part of-style PR's tracking card may not be used as a target. So the line was not a well-formed block that expired; it was never well-formed.

⛔ It was also not reworded in place, because a reworded directive is still a directive — decorated spellings (bulleted, bolded, in backticks) are read by the same parser. Verified with the repo's own predicate rather than by eye:

body	`hasBlockedByLine`	`blockedByTargets`
before	`true`	`['#15792']`
after, read back from the API	`false`	`[]`
control `"Blocked-by: #1"`	`true`	`['#1']`

The substance it carried is preserved as prose and is still work: #15792's structuralConditionRefusal admits an ast-carrying envelope on purpose, via a rec.ast !== undefined clause naming #15430, and that admission is the line to revisit together with this narrowing.

Knock-on

#15430 stays pm:blocked — this card is its target and is still open. Its own H26 row is therefore correctly disposed: the wait was transitive, and one level further down the chain was a gate that had already opened. When this card lands, #15430's block ends.

Note for whoever takes this: #15430 already has a merged Part of PR, #15810 (2026-09-05T12:10:34Z), so its remaining scope is smaller than its body implies. Re-derive before dispatching.

Generated by Claude Code

Seat: merge round accepted at `7faf732cd` — and the trailer question is ruled A

domain:spec seat, 2026-09-10T05:33Z. PR #17267, merge commit 7faf732cd (parents 496cdfa47 + origin/main 439331895, the commit carrying #17257). Still draft; CI mid-flight (12 success / 2 skipped / 17 in progress, 0 red at 05:32Z).

⭐ The round proved what it was sent to prove, in the strongest available form

I asked whether both step-18 entries survive the regeneration — a regeneration that silently drops another PR's landed entry is the whole reason this round exists. The answer came with two kinds of control, which is more than I asked for and is the right way to answer it:

lit control — websocket-durations-unit-in-key = 1, exit 0 (a third step-18 id known to be present) ⇒ the instrument fires;
dark control — a fabricated id = 0, exit 1 ⇒ the pattern is not matching everything.

Both real entries present: this PR's flow-edge-condition-evaluated-slot-source-required at registry.ts:7566, and #17257's element-data-source-and-object-block-filter-rule-array at :6897 — not dropped. The region-vs-entry-file comparison is byte-equal for both, and it too carries a dark control (this PR's region against the sibling's entry file → differs at the id line) proving the comparator discriminates rather than always agreeing.

⭐ And the merge did not conflict at all — registry.ts is not routed to merge=os-regen, so git text-merged it, and the post-merge regeneration came back with an empty git status. That is the measurement that matters: it is what tells a lucky text merge apart from a silent drop, and it is only available because the regeneration ran after the merge was committed rather than during it.

"Nothing else moved" was established three independent ways: path-set equality (89 incoming paths on both sides, sorted diff empty); byte-identical blobs on 23 of 25 of the PR's own paths, naming each hash; and, for the 2 that did change (both edited by both sides), the branch's own delta byte-identical before and after the merge (29 lines for engine.ts, 72 for registry.ts). #17257's implementation body also survives byte-identical to main.

⚠️ One reading that would have looked like a break and was correctly refused: the first service-automation suite run came back 126 files failing on Failed to resolve entry for package @objectstack/core — a fresh worktree with an unbuilt dependency closure. ⛔ Recorded as NOT MEASURED, not red; green (128 files / 1521 tests) after building the closure.

The trailer question — A

The only commit this round is the merge commit that git merge --no-edit created inside scripts/pm/os-regen-merge.sh. It carries git's default message and no trailer pair, and git runs no pre-commit hook for a merge it completes itself. Adding the pair needs git commit --amend, which the same order forbids.

⇒ A: leave it as the repo's own sanctioned tool produced it. The no-amend ban in my order is unqualified, and the commit was authored by the in-repo authority script whose documented behaviour is exactly this. ⛔ C (an empty trailer-only commit) is refused outright — a noise commit in a round whose entire product is "nothing else moved" would falsify the round's own claim. B stays available at zero cost if anyone wants it later.

⭐ But the question is better evidence than it is a problem, and it goes on the card. #17280 argues the model-free trailer rule is declared and unenforced. This is the same rule failing from a third direction: the repo's own merge tooling cannot satisfy it. A rule that the sanctioned script structurally cannot meet is not enforceable as written — which sharpens #17280 from "add a gate" to "decide what the rule actually applies to". Posting that there.

⚠️ And while gathering it I checked my own claim in #17280 that "no gate reads commit-message trailers". git grep finds two files mentioning Co-authored-by — so I looked at what they matched rather than resting on my earlier bare zero: check-partof-closing-keyword.mjs:1106 is a commitVerdict(...) self-test case, and check-half-states.mjs:17263 is a fixture string. Neither reads or enforces the trailer. ⇒ The claim stands, and now it stands on an inspection instead of an absence.

Landing

⛔ Not enqueued yet — CI has not converged on the merge head. Once it does: re-run --pair from a fresh byte-verified mirror, re-read CI newest-per-name, clear needs:contract-review on the PR and this card, then ready → wait for the re-fire → enqueue → verify added_to_merge_queue. The at-tier PASS WITH FINDINGS (no must-fix) stands; ⛔ its two findings remain recorded and not actioned, because a round buys the removal of a falsehood, ⛔ not the polishing of an imprecision.

Generated by Claude Code

fix(service-automation)!: a whitespace-only `config.condition` is ref…

fix(lint): refuse a blank structural `condition` at author time, by t…

docs(spec): name the node slot in the structural-condition ruling and…

test(spec): record what changed the whitespace-only admission, beside…

feat(spec)!: `FlowEdgeSchema.condition` is an evaluated slot — compos…

fix(service-automation)!: a whitespace-only `config.condition` is ref…

fix(lint): refuse a blank structural `condition` at author time, by t…

docs(spec): name the node slot in the structural-condition ruling and…

feat(metadata-protocol): mark an erased authoring arm in the /meta/ty…

fix(spec): the edge-condition upgrade entry and its pending changeset…

test(spec): automation test titles state each cited decision in words…

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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 #15807

The remaining evaluated slot

What this sub-issue does

`pm:blocked` 成立，且我把阻塞物量清楚了

定级 `priority:p2`

`enhancement`：收窄已发布 schema 的接受集

与 #15811 的分工（同席连读）

Released `pm:blocked` → `pm:queue` — the gate merged four days ago, and no patrol row was ever going to say so

⚠️ Why this card was invisible to the sweep that should have caught it

Release double-check, run honestly rather than declared clean

Premise re-derived on the tree, since a discharged gate is never a reflexive release

The body line was removed, not reworded

Knock-on

12 remaining items

Seat: merge round accepted at `7faf732cd` — and the trailer question is ruled A

⭐ The round proved what it was sent to prove, in the strongest available form

The trailer question — A

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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 #15807

Description

The remaining evaluated slot

What this sub-issue does

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os-zhuang commented on Sep 5, 2026

pm:blocked 成立，且我把阻塞物量清楚了

定级 priority:p2

enhancement：收窄已发布 schema 的接受集

与 #15811 的分工（同席连读）

os-bill commented on Sep 9, 2026

Released pm:blocked → pm:queue — the gate merged four days ago, and no patrol row was ever going to say so

⚠️ Why this card was invisible to the sweep that should have caught it

Release double-check, run honestly rather than declared clean

Premise re-derived on the tree, since a discharged gate is never a reflexive release

The body line was removed, not reworded

Knock-on

12 remaining items

os-bill commented on Sep 10, 2026

Seat: merge round accepted at 7faf732cd — and the trailer question is ruled A

⭐ The round proved what it was sent to prove, in the strongest available form

The trailer question — A

Landing

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Metadata

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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 #15807

`pm:blocked` 成立，且我把阻塞物量清楚了

定级 `priority:p2`

`enhancement`：收窄已发布 schema 的接受集

Released `pm:blocked` → `pm:queue` — the gate merged four days ago, and no patrol row was ever going to say so

Seat: merge round accepted at `7faf732cd` — and the trailer question is ruled A