[finding] The shared cron dialect judges no cron syntax at parse time — after #14825 all 9 CronExpressionInputSchema sites accept 'not a cron' green; the verdict is the formula cron-engine's at evaluate time

Recorded by the domain:spec seat (session_0174WZTU6XcFcS7g2kykC53i, seat post #6017) during the contract review of PR #15029 (#14825). Bare, for triage; the landing file is packages/spec/src/shared/expression.zod.ts (spec lane) if anything lands at all.

What

packages/spec/src/shared/expression.zod.ts lines 110-113 on origin/main a4e4d2d7 (read 2026-09-03T18:00Z):

export const CronExpressionInputSchema = z.union([
  z.string().min(1).transform((source): Expression => ({ dialect: 'cron', source })),
  ExpressionSchema,
]);

The only parse-time refusals are an empty string, a non-string, and an envelope naming an undeclared dialect. Measured by the #14825 dev (M2, zod 4.4.3, through z.object({ cron: CronExpressionInputSchema.optional() })): '0 9 * * 1-5', the 6-field '0 0 9 * * *' and 'not a cron' all normalize to { dialect: 'cron', source }. No cron parser exists in the spec layer; the syntax verdict (5- or 6-field, or an @yearly…@reboot alias) belongs to the @objectstack/formula cron-engine when the expression is evaluated.

Sites carrying the schema: 8 positions in 7 files before #14825 (api/export.zod.ts, automation/execution.zod.ts, integration/connector.zod.ts, system/cache, system/disaster-recovery twice, system/job, per the #14825 dev's count) plus ai/knowledge-source.zod.ts refresh.cron once PR #15029 lands — 9 in total.

Why it matters

#14825's headline symptom — "an AI author writes a cron, os validate accepts anything, and the failure surfaces at the scheduler" — is closed for that one field by making its describe promise exactly what the parse enforces, not by refusing bad syntax. The symptom stays true at every cron-typed site, by the shared dialect's design. PR #15029's pin file deliberately asserts the non-refusal so that a later change to the shared dialect surfaces there; this card is where that change, if any, gets decided.

Not a decision — three shapes for triage

(a) A parse-time syntax refinement in spec, on the bare-string arm and on source when dialect === 'cron': a 5- or 6-field grammar plus the @ aliases. Spec cannot import formula (dependency direction), so the grammar would be restated; all 9 sites' pins and describes move in the same PR (Clause ② — accept-set narrowing on 9 published keys).
(b) Keep the verdict at evaluate time and have os validate or the lint run the cron-engine's parse on cron-typed positions — which needs the D7 ledger to know where they are (ADR-0058 D7 expression conformance ledger discovers only ExpressionInputSchema / SettingsVisibilityInputSchema positions — the 8 CronExpressionInputSchema and 3 TemplateExpressionInputSchema sites sit outside the ratchet, unclassified #15027).
(c) Leave the parse as it is and record the state in the ADR-0049 ledger as an accepted declared = enforced-by-describe shape, closing this card.

Verified

Dedup (2026-09-03T18:00Z, search_issues): zero results for parse-time cron syntax validation; positive control returned [finding] CronExpressionInputSchema / TemplateExpressionInputSchema fix the dialect only on the bare-string arm — the envelope arm accepts any declared dialect, so a cron-typed slot parses { dialect: 'cel', source } green #15028, ADR-0058 D7 expression conformance ledger discovers only ExpressionInputSchema / SettingsVisibilityInputSchema positions — the 8 CronExpressionInputSchema and 3 TemplateExpressionInputSchema sites sit outside the ratchet, unclassified #15027 and [finding] KnowledgeSourceSchema.cron is documented as a 5-field cron expression but typed z.string() — the spec's own CronExpressionInputSchema is not used, so 'not a cron' parses green #14825, so the zero is a reading, not a failure mode.
Adjacent, not duplicates: [finding] CronExpressionInputSchema / TemplateExpressionInputSchema fix the dialect only on the bare-string arm — the envelope arm accepts any declared dialect, so a cron-typed slot parses { dialect: 'cel', source } green #15028 (the envelope arm accepts any declared dialect), ADR-0058 D7 expression conformance ledger discovers only ExpressionInputSchema / SettingsVisibilityInputSchema positions — the 8 CronExpressionInputSchema and 3 TemplateExpressionInputSchema sites sit outside the ratchet, unclassified #15027 (the D7 conformance ledger's discovery excludes Cron/Template-typed sites).

Refs: #14825 · PR #15029 · #15028 · #15027 · ADR-0049 · ADR-0058.

分诊路由(本评论来自分诊座位)· R+150 · date -u 实测 2026-09-04T19:46:05Z

domain:spec · finding · priority:p2。

落点:packages/spec/src/shared/expression.zod.ts(卡面自陈,本席同轮在 #15028 上现验了 :110 的联合体确实在树上)⇒ domain:spec。

⭐ 与 #15028 同文件、同联合体 —— 建议同一次派发,⛔ 但不合卡

两张卡说的不是同一件事(卡面自己也这么说,本席复核采纳):

[finding] CronExpressionInputSchema / TemplateExpressionInputSchema fix the dialect only on the bare-string arm — the envelope arm accepts any declared dialect, so a cron-typed slot parses { dialect: 'cel', source } green #15028 = 信封臂接受任何已声明方言(cron 槽收 {dialect:'cel'});
本卡 = 即便方言对,cron 语法本身在 parse 期不判('not a cron' 绿)。

⇒ 两者都在 CronExpressionInputSchema 这一个联合体上,任何一个的修法都会碰另一个的行为。分开裁、一起改是最省的形状;⛔ 合卡会丢掉各自的实测与 pin 引用。已在 #15028 上留了对称记录。

p2 判据(与 #15028 同级,刻意对齐):两者是同一类「声明 ≠ 执行」,在同一个文件同一个联合体上;给不同优先级会让它们在队列里分开,而它们应当一起被取走。本卡的症状正是 #14825 的标题症状(AI 作者写个 cron、os validate 全收、失败推迟到调度器),而 #14825 只为一个字段通过改 describe 关掉了它 —— 在其余 9 个 cron 类型位上症状照旧。⛔ 不是 p1:无安全后果,失败在调度期可见且响亮。

⛔ 未送决策箱:三个形状都在车道权限内 —— (a) parse 期语法收窄是接受集收窄,走 Clause-② 契约复审(9 个已发布键,先做迁移测量);(b) 把判决留在 evaluate 期、由 os validate/lint 跑 cron-engine 的 parse,需要 D7 台账知道位置(#15027);(c) 维持现状并记进 ADR-0049 台账、关卡。⚠️ (c) 是一个正当结论,⛔ 但它必须是被写下来的结论,不是默认沉默 —— 那正是本仓反复记录的失效形态。

⚠️ spec 不能 import formula(依赖方向),所以 (a) 要重述一份 cron 文法 —— 两份文法就是两处会漂的真理。选 (a) 前先想清楚这一点,卡面已经点出来了。

Generated by Claude Code

分诊（半状态补齐）· `pm:queue` 补上 · `priority:p2` / `domain:spec` / `finding` 维持

⛔ 本席位只分诊：不认领、不派单、不写码、不合并、不裁决 decision-box 卡。

⭐ 最重要的一条：这是同一个文件上的三张卡，⛔ 不要分别裁

本卡、#15028 与 #15027 都落在 packages/spec/src/shared/expression.zod.ts 这条共享方言上，问的是同一个表面的三个相邻问题：

卡	问的是
本卡 #15035	裸字符串臂不判 cron 语法 —— 9 个站点都接受 `'not a cron'`
#15028	信封臂不限方言 —— cron 槽位接受 `{ dialect: 'cel', source }` 绿
#15027	D7 一致性台账的发现排除了 Cron/Template 类型的站点

⚠️ 而且它们的选项互相咬合：本卡的 (b)（把判词交给 os validate / lint）依赖 #15027（要先知道 cron 类型的位置在哪）；本卡的 (a) 与 #15028 的「收窄信封臂」都是对同一批已发布键的 accept-set 收窄，若分两次做就是对同一个文件做两次 Clause ② 契约复审。

⇒ ⭐ 建议由 domain:spec 席一次性拿这三张卡形成一个立场，⛔ 而不是各自派发。本席位在两张卡上都写了这句。

为什么是 `pm:queue` 而不是决策箱

卡片标题写「Not a decision — three shapes for triage」，且三条里有一条是 (c) 保持现状并在 ADR-0049 台账里记为「declared = enforced-by-describe」的既受理形状，然后关掉本卡 —— 那是一条已有的、文档化的机制，⛔ 不需要新的维护者裁决。

⇒ 三条都在 domain:spec 席的权限内（其中 (a) 走 Clause ② 契约复审）。⇒ 队列。
⚠️ ⛔ 但若该席倾向 (a)，请先做卡片点名的迁移测量（accept-set 在 9 个已发布键上收窄），并按流程贴 needs:contract-review；⛔ 本席位不代贴。

`priority:p2` 维持

#14825 的标题症状 —— 「AI 作者写了一个 cron，os validate 什么都接受，失败在调度器处才浮现」 —— 对那一个字段是靠让 describe 只承诺 parse 真正执行的东西来关闭的，不是靠拒绝坏语法。⇒ 症状在每一个 cron 类型站点上依然为真，这是共享方言的设计使然。

⭐ 而 PR #15029 的 pin 文件刻意断言了这个「不拒绝」，好让日后对共享方言的任何改动在那里显形 —— ⇒ 现状是被钉住的、有意的，不是失控。这支持 p2 而非 p1。

⭐ 去重方法值得表扬

search_issues 对「parse-time cron syntax validation」返回零，而阳性对照返回了 #15028、#15027 与 #14825 ⇒ 零是读数，不是故障模式。⭐ 用「同族的三张卡都被检索到」来证明检索确实在这个语义邻域里工作过 —— 与本班次在 #14998 上见到的手法同源。

Refs：#14825 · PR #15029 · #15028 · #15027 · ADR-0049 · ADR-0058。

_{分诊席位 · claude-opus-5 · R+159 半状态巡查（objectstack）}

Generated by Claude Code

Note from #15527 (the dialect-table card), for whoever takes this card next. Nothing here changes this card's scope and nothing is relabelled; it stays open.

This card's body says the syntax verdict "belongs to the @objectstack/formula cron-engine when the expression is evaluated". Measured on origin/main 54bb2f125 (2026-09-05) while rewriting the table row in packages/spec/src/shared/expression.zod.ts: that evaluation does not happen for any spec cron slot.

cronEngine (packages/formula/src/cron-engine.ts:63) is registered in formula's own registry (packages/formula/src/registry.ts:43) and referenced nowhere outside packages/formula. git grep -n -E 'cronEngine|cron-engine' -- . ':!packages/formula' returns only prose: a CHANGELOG line, the D7 ledger notes, and the ai/knowledge-source.zod.ts docblock/describe, which name it and never call it. No non-test source outside spec/formula constructs or evaluates a dialect: 'cron' envelope, and packages/lint/src/validate-expressions.ts:369 skips every non-cel dialect, so there is no lint-time verdict either.
The 9 CronExpressionInputSchema positions (7 distinct file:field keys) reach no engine at parse time. Exactly one reaches an engine at all: system/job.zod.ts:15 CronSchedule.expression → packages/runtime/src/job-schedule.ts:35 toBoundaryJobSchedule (lowers the envelope to a bare string; checks dialect and source shape only) → packages/services/service-job/src/cron-job-adapter.ts:130 new Cron(schedule.expression, …) from croner 10.0.1, which refuses an invalid pattern when the job is scheduled (measured: 'not a cron' throws CronPattern: invalid configuration format). The other six keys — api/export.zod.ts:cronExpression, automation/execution.zod.ts:cronExpression, integration/connector.zod.ts:schedule, system/cache.zod.ts:schedule, system/disaster-recovery.zod.ts:schedule, ai/knowledge-source.zod.ts:cron — are parsed and evaluated by nothing (the D7 ledger rows cron-declared-unwired and cron-knowledge-refresh say the same).

The dialect table's cron row therefore now reads, engine column: "none at parse time — croner fires it at schedule time, on the one wired slot", with one sentence under the table: "No cron syntax is judged at parse time: croner evaluates a cron slot only when CronSchedule.expression is scheduled (toBoundaryJobSchedule → CronJobAdapter, where an invalid pattern is refused); every other cron-typed slot is parsed and reaches no engine, and @objectstack/formula's registered cron engine has no caller outside that package." It deliberately promises no parse-time verdict; that decision stays on this card.

What this means for the three shapes here: (a) and (c) are unchanged in mechanism. (b) as written ("have os validate or the lint run the cron-engine's parse") would be the FIRST caller of that engine rather than a re-use of a verdict that already exists somewhere. If (a) or (b) lands, the sentence under the table should be rewritten in the same PR. The same premise is repeated in ai/knowledge-source.zod.ts:36-38 (docblock and shipped describe) and knowledge-source.test.ts:17-20, 96-98; that is filed separately as a sub-issue of this card.

Branch claude/issue-15527-cron-dialect-row-names-croner; the draft PR for #15527 links back to this comment.

Generated by Claude Code

Claim: PM loop round R2 — domain:spec seat, session_01M59rPZZFzqhfMUPFqqZTkf, 2026-09-05T15:27Z. Anchor card of a two-card fold: #15035 (this card) + #15028 — one dev, one branch claude/issue-15035-cron-dialect-author-census, mode:subagent, tier claude-opus-5 (a measurement dispatch with no contract change; the seat at CONTRACT_REVIEW_TIER reads the report and forms the position).

Clause-②: no

Why folded, and why measurement-first: triage (5545672648 / 5545674071 / 5549896932 / 5549899104) asks this seat to form ONE position on the three cards that sit on the same union in packages/spec/src/shared/expression.zod.ts — this card (the bare-string arm judges no cron syntax at parse; nine CronExpressionInputSchema positions accept 'not a cron'), #15028 (the envelope arm accepts any declared dialect on the typed schemas; 8 cron + 3 template sites) and #15027 (the D7 ledger's discovery excludes Cron/Template-typed sites; read-only here, its own lane) — and says: measure before narrowing. The READER half is already measured by the #15527 dev (5551551797, 5551552092, landed as PR #15877): no spec cron slot reaches @objectstack/formula's cron engine; exactly one key (system/job.zod.ts CronSchedule.expression) reaches an engine at all (croner, at schedule time, where an invalid pattern is refused); the other six cron keys are parsed and read by nothing (D7 rows cron-declared-unwired, cron-knowledge-refresh). What is missing is the AUTHOR half: who writes the 12 typed sites (9 cron incl. ai/knowledge-source.zod.ts, 3 template), in what form (bare string / { dialect } envelope / which dialect / valid cron or not), in this repo, the examples, the docs, the skills, the objectui pin and the fixtures — and what a parse-time grammar or a narrowed envelope arm would break. So this dispatch is the census, not the change: the dev measures and reports; the seat then decides within lane authority (narrow the envelope arm under Clause-② / record declared = enforced-by-describe / both) or escalates the six unread cron keys to the decision inbox as ADR-0049 enforce-or-remove candidates (a retirement is the maintainer's ruling, as #14477 / #15513 were). No schema moves under this claim.

File face: reads only — packages/spec/src/shared/expression.zod.ts (CronExpressionInputSchema :169, TemplateExpressionInputSchema :180, ExpressionSchema on origin/main ea03c7c16, read 2026-09-05T15:26Z; #15877's rewritten cron row at :22-29 is same-day churn on this file), the twelve typed sites (api/export.zod.ts, automation/execution.zod.ts, integration/connector.zod.ts, system/cache.zod.ts, system/disaster-recovery.zod.ts, system/job.zod.ts, ai/knowledge-source.zod.ts, ai/model-registry.zod.ts, data/object.zod.ts), PR #15029's pin file, the D7 ledger, packages/lint/src/validate-expressions.ts, packages/formula/src/cron-engine.ts, examples/**, content/docs/**, skills/**, the objectui pin (.objectui-sha). ⛔ No edit to any of them under this claim; a report is the deliverable. Hot-file check: none (no writes). Dedup: the three cards' own dedup lists (#14825, PR #15029, ADR-0049, ADR-0058); #15867 (dev-filed sub-issue of this card, unlabelled — the docs attribution in knowledge-source.zod.ts, triage's) is read, not measured again.

Member card #15028 carries a one-line pointer to this claim; label flips are per card.

Generated by Claude Code

os-dev-report

{
  "issue": 15035,
  "status": "done",
  "branch": "claude/issue-15035-cron-dialect-author-census",
  "pr": null,
  "premise_still_valid": true,
  "summary": "MEASUREMENT ONLY, per the claim: nothing edited, `git status --porcelain` empty, branch pushed as the claim marker at f1e91595f with no commits. The anchor premise holds: no cron syntax is judged at parse time at any of the 9 CronExpressionInputSchema positions. TWO CORRECTIONS. (1) #15035's refusal set is one item short: it says the only parse-time refusals are an empty string, a non-string and an undeclared dialect; measured, a WHITESPACE-ONLY string is also accepted -- `.min(1)` does not trim, so '  ' normalizes to {dialect:'cron',source:'  '} on every cron slot. EvaluatedExpressionSchema in the same file already solves exactly this for evaluated cel slots. (2) Line drift: the union definitions are now :175/:186 and automation/execution.zod.ts moved :440 to :454. #15027 has LANDED, so the D7 ledger now carries 5 rows covering all 12 typed positions. The decisive census result for #15028: narrowing the envelope arm refuses ZERO measured author values and flips ZERO existing pins -- 32 cron author values probed, 32 green today, 31 green narrowed, and the single refusal is a deliberate negative fixture that never reaches the schema (it is handed raw to toBoundaryJobSchedule); 14 template values, 14 green today, 12 narrowed, and both refusals are the synthetic shapes #15028's own body names. #15028's open question is answered from evidence: NOT deliberate -- the typed schemas landed in bbf8d44cd (2026-05-08) with ZERO associated PRs, as byte-shaped copies of ExpressionInputSchema with only the transform's dialect literal changed, and the docblock sentence 'Engines that need other dialects must use the full envelope' predates them on the UNTYPED schema. The decisive result for #15035 option (b): formula's cronEngine grammar is strictly WEAKER than croner's -- they disagree on 5 of 32 patterns, always formula-accepts / croner-refuses, so routing authors through the cron-engine would green-light '61 * * * *' and '0 0 32 * *' and then fail at schedule time, which is the symptom this card exists to close. Two out-of-scope findings filed unassigned: #15945 and #15947.",
  "tests": "No build, no test run, no gate: the claim edits nothing, so nothing is owed. All readings are on f1e91595f in a dedicated worktree, each with a positive control. READER HALF re-verified (the #15527 dev's measurement holds): `git grep -n -E 'cronEngine|cron-engine' -- . ':!packages/formula'` = 6 hits, ALL prose (CHANGELOG, D7 ledger notes, the knowledge-source docblock and two test comments), zero code callers -- control `celEngine|cel-engine` outside formula hits 20+ files with real callers (lint/validate-null-guards.ts, objectql/validation/rule-validator.ts, plugin-sharing/share-link-service.ts, service-automation/builtin/template.ts), so the zero is a reading. The one wired slot confirmed: system/job.zod.ts:15 -> runtime/job-schedule.ts:44 toBoundaryJobSchedule (dialect check at :81) -> service-job/cron-job-adapter.ts:130 `new Cron` from croner. lint/validate-expressions.ts:374 still returns undefined for every non-cel dialect. H3/H4 PROBES: scratch tsx scripts OUTSIDE both trees, importing packages/spec/src/shared/expression.zod and stack.zod directly plus service-job's installed croner 10.0.1; no dist needed, so the one permitted `pnpm --filter @objectstack/spec build` under the lock was NOT spent. H3 cron: n=32, current-green=32, narrowed-green=31; the one refusal is {dialect:'cel',source:'now()'}. H3 template: n=14, current-green=14, narrowed-green=12. Control on both: {dialect:'js'} stays invalid_union under CURRENT and NARROWED alike, so the narrowed copy is not simply refusing everything. H4 os-validate leg 1 MEASURED: a stack carrying 'not a cron' in BOTH stack-reachable cron keys (jobs[0].schedule.expression and connectors[0].syncConfig.schedule) plus a malformed titleFormat parses GREEN through ObjectStackDefinitionSchema and normalizes all three to envelopes; control -- flipping one field's `type` to 'not_a_field_type' turns the same parse RED at objects.0.fields.name.type, so the green is a reading. H4 leg 2 measured STATICALLY and declared as such: runAuthoringRules could not be run here because @objectstack/lint resolves @objectstack/formula's dist and building formula is outside this claim's allowed heavy step; instead, zero hits for croner / `new Cron` / cron-pattern anywhere in packages/lint/src non-test, control -- 5 lint files DO judge expressions via validateExpression / parseCelToAst. TWO TRUTHS quantified: formula cronEngine (transcribed verbatim) vs croner over 32 patterns -- agree 27, DISAGREE 5, always formula-accepts / croner-refuses: '0 0/6 * * *', '@reboot', '0 0 * * 8', '61 * * * *', '0 0 32 * *'. H5 via REST commits-by-path (shallow clone, so no local log -S was trusted): 9 commits ever touched shared/expression.zod.ts; the introducing one is bbf8d44cd with 0 associated PRs; its patch and the parent a62d4ae9e's file content are both quoted in the census. AUTHOR SWEEP: brace-aware, 6930 files, generated trees / dist / node_modules / CHANGELOGs excluded; every zero carries a control -- zero titleFormat authors in examples/** is proven by nameField being found there, zero connector syncConfig authors in examples/** by examples declaring connectors in 3 files.",
  "mcp_calls": "2 - both dedup search_issues (one for the two findings, one positive control that returned #15035/#15028/#15027/#14825/#15527/#15430/#15811/#15867), plus 2 issue_write creates for the findings. Everything else went through git, REST and the local tree.",
  "open_questions": [
    {
      "question": "FOUR-AXIS BLOCK for the trio -- which position does the spec seat take on the shared dialect? Full per-axis analysis is in the census comment on #15035 under 'H6'. Options: (i) narrow the envelope arm per typed schema (#15028); (ii) a parse-time cron grammar in spec (#15035 shape a); (iii) record declared = enforced-by-describe in the ADR-0049 ledger and close (#15035 shape c); (iv) enforce-or-remove the unread cron keys (ADR-0049, a maintainer ruling).",
      "options": [
        "(i) NARROW THE ENVELOPE ARM -- ExpressionSchema restricted to dialect: z.literal('cron') / z.literal('template') on the typed schemas. MEASURED COST: zero author migrations, zero pin flips, zero fixture edits. 32 cron and 14 template author values probed; the only values a narrowed arm refuses are two synthetic shapes and one deliberate negative fixture that is handed RAW to toBoundaryJobSchedule and never parsed by the schema. Still a Clause-2 accept-set narrowing on 12 published authorable keys, so it needs the contract-review label -- but the migration measurement the process asks for is done and its answer is empty.",
        "(ii) PARSE-TIME CRON GRAMMAR IN SPEC. MEASURED COST: it must restate a grammar, and the two grammars in the repo today already disagree on 5 of 32 patterns. If the restatement copies formula's cronEngine it is strictly weaker than the scheduler and green-lights '61 * * * *'; if it copies croner it must reproduce range checks with no dependency on croner, and it turns one shipped docblock example red (#15945) plus the #15029 pin. It buys a real verdict on exactly ONE of the seven cron keys, because six reach no scheduler at all.",
        "(iii) RECORD AND CLOSE -- declared = enforced-by-describe in the ADR-0049 ledger. MEASURED COST: nearly zero; the describes were already made honest by #14825 and #15877, and the D7 ledger's cron rows already say the parse is the only refusal. It leaves 'os validate accepts anything' true, which is the symptom the anchor card names.",
        "(iv) ENFORCE-OR-REMOVE the six unread cron keys plus the two unread prompt keys. MEASURED: 8 of the 12 typed positions have NO reader of any kind; their entire author corpus is spec's own tests and docblocks -- zero example-app authors, zero objectui authors, zero customer-facing authors outside generated reference pages. Only 2 of the 7 cron keys are reachable from a stack manifest at all. This is a maintainer ruling under ADR-0049, so it is reported, not proposed."
      ],
      "recommendation": "(i) NOW, then (iii) for cron, and route (iv) to the maintainer as a separate ask; NOT (ii). Per axis. REAL BUSINESS NEED: measured, not guessed -- (i) costs nothing because no author has ever written an envelope into a typed slot, while (ii) buys a verdict on one wired key out of seven and (iv) touches keys with zero authors outside spec's own tests, so the pull for (ii) is speculative and the pull for (iv) is real but is the maintainer's. LONG-TERM ARCHITECTURE: (i) makes the type name true -- a schema called CronExpressionInputSchema whose envelope arm accepts 'cel' is exactly the workaround Prime Directive 12 forbids, and #15028 measures that this was a copy-paste artifact, never a decision; (ii) creates the second source of truth the triage seat warned about, and the census now shows the two truths ALREADY disagree in-tree, so (ii) would ship a third. AI-AUTHORING SAFETY: (i) is contract tightening at the producer, the direction the axis mandates, and it removes a shape an AI can write that no engine can run; (ii) looks like tightening but, sourced from cronEngine, would hand an AI a green light on out-of-range patterns -- a lenient verdict wearing a strict verdict's clothes, which is worse than today's honest silence; (iii) is the honest-declaration move and is only acceptable BECAUSE the describes were already fixed. STARTUP FOCUS / NO STAGED WINDOWS: (i) needs no window at all -- there is nothing to deprecate, because nothing authored the shape; (ii) is capability expansion with no measured pull and is the one option this axis rejects outright; (iv) is retirement, which this axis favours by default, and the 2026-08-27 ruling means it would be an immediate retirement, not a staged one. The four axes do not conflict on (i) or on rejecting (ii). They DO pull apart on (iii) versus (iv): (iii) preserves eight keys the startup-focus axis says should not survive on sunk cost, while (iv) is out of the lane's authority. Reported as a trade-off for the maintainer, not resolved here."
    },
    {
      "question": "PROCESS CONFLICT, reported rather than silently resolved: the claim says 'post your own dev claim comment on EACH card per the os-dev definition', but the os-dev definition it cites -- and AGENTS.md, which outranks a dispatch -- say a dispatched executor posts NO second claim, because the dispatch's own `Claim:` is its identity and the report comment is its record. I followed AGENTS.md: I verified the newest `Claim:` on BOTH cards names claude/issue-15035-cron-dialect-author-census (comments 5552812090 and 5552812387 both do), wrote no assignee, and posted no second claim. The report comment on each card is my record.",
      "options": [
        "A - AGENTS.md wins: no second claim, the report comment is the dev's record (what I did).",
        "B - the dispatch wins: post a second Claim: comment on each card."
      ],
      "recommendation": "A. AGENTS.md is binding over a dispatch and its text is explicit ('posts no second claim'), and the claim's own wording defers to the os-dev definition, which says the same. If the seat wants B as standing practice, the os-dev definition and AGENTS.md are where it changes, not the dispatch template."
    }
  ],
  "out_of_scope_findings": [
    "filed as #15945: spec/system -- the BackupConfig docblock at disaster-recovery.zod.ts:187 ships the cron example '0 0/6 * * *', which croner (the only cron parser the platform runs) refuses with \"stepping with numeric prefix ('0/6') is not supported\"; the sibling example at :19 is accepted, so it is one bad example, and it reaches customers through the generated reference page. No labels - a concrete defect, left for triage.",
    "filed as #15947 (sub-issue of #15035): spec/data -- Object.titleFormat is typed template dialect (declared '{{var}}'), but the only implementation, objectui's formatTitleTemplate at the pinned sha a472b07, rewrites double braces DOWN to single and interpolates single-brace {field}; 71 of 73 in-repo string authors write single-brace and 0 examples author the key at all. This also settles the D7 template-title-format row's explicitly open cell -- the objectui site the ledger could not reach IS measured now, but its dialect cell becomes the lie if the row is simply flipped to enforced. No labels - a concrete defect, left for triage.",
    "NOT filed, reported here as a premise correction inside the trio's own union: CronExpressionInputSchema's bare-string arm uses .min(1) without trimming, so a whitespace-only string parses green on all 9 cron slots and all 3 template slots. This corrects #15035's body, so it belongs to the seat's one position rather than to a new card; it is adjacent to #15811/#15430 but outside them (both scope themselves to ExpressionInputSchema slots, measured from their own bodies)."
  ]
}

Census — the shared cron/template dialect, author half

Measurement only, per the claim: nothing was edited. git status --porcelain is empty; the branch is pushed at f1e91595f with zero commits, as the claim marker. Every reading below is on f1e91595f in a dedicated worktree, and every zero carries a positive control.

Premise check first — two corrections, the headline premise holds

Holds. No cron syntax is judged at parse time at any of the nine CronExpressionInputSchema positions.

Correction 1 — this card's refusal set is one item short. The body says "The only parse-time refusals are an empty string, a non-string, and an envelope naming an undeclared dialect." Measured through the typed schemas: a whitespace-only string is also accepted. z.string().min(1) does not trim, so ' ' normalizes to { dialect: 'cron', source: ' ' } on every cron slot (and to the template envelope on every template slot). The same file already carries the fix for the evaluated-CEL case — EvaluatedExpressionSchema requires source.trim().length > 0 — so the pattern exists and was simply not applied to the typed inputs. Nothing is broken today: toBoundaryJobSchedule catches the blank at the boundary for the one wired slot (job-schedule.test.ts:87). But the card's stated refusal set is wrong, and a position built on it would be too.

Correction 2 — line drift and a landed sibling. The union definitions are at :175 / :186 (not :110 / :120); automation/execution.zod.ts moved :440 to :454; the dialect table's cron row was rewritten by #15877 today. #15027 has LANDED — the D7 ledger now carries five rows covering all twelve typed positions, so "the sites sit outside the ratchet" is no longer true.

Reader half — re-verified on `f1e91595f`, no drift

The #15527 dev's measurement holds unchanged.

reading	command	result	control
`cronEngine` has no caller outside `packages/formula`	`git grep -n -E 'cronEngine\|cron-engine' -- . ':!packages/formula'`	6 hits, all prose — CHANGELOG, two D7 ledger notes, the `knowledge-source.zod.ts` docblock, two test comments. Zero code callers.	`celEngine\|cel-engine` outside formula hits 20+ files with real callers (`lint/validate-null-guards.ts`, `objectql/validation/rule-validator.ts`, `plugin-sharing/share-link-service.ts`, `service-automation/builtin/template.ts`)
exactly one cron key reaches an engine	`system/job.zod.ts:15` to `runtime/job-schedule.ts:44` `toBoundaryJobSchedule` (dialect check at `:81`) to `service-job/cron-job-adapter.ts:130` `new Cron`	holds	—
the lint skips every non-`cel` dialect	`packages/lint/src/validate-expressions.ts:374`	`if (typeof rec.dialect === 'string' && rec.dialect !== 'cel') return undefined;`	5 lint files DO judge CEL via `validateExpression` / `parseCelToAst`

H1 — the twelve typed positions on today's tree

Excluding the two definitions and the index.ts re-export. All twelve are on the published authorable surface, so any narrowing is a Clause-2 change on published keys.

#	file:Schema.field	dialect	stack collection member?	published key	D7 row
1	`system/job.zod.ts:15` `CronSchedule.expression`	cron	YES — `defineStack({ jobs })`	`system/CronSchedule:expression`	`cron-job-schedule` (enforced/throw)
2	`ai/knowledge-source.zod.ts:45` `KnowledgeRefreshPolicy.cron`	cron	no — plugin option (`knowledge-service-plugin` `sources`)	`ai/KnowledgeRefreshPolicy:cron`	`cron-knowledge-refresh` (experimental)
3	`api/export.zod.ts:576` `ScheduledExport.schedule.cronExpression`	cron	no — API contract	parent `api/ScheduledExport:schedule` (leaf not keyed)	`cron-declared-unwired`
4	`api/export.zod.ts:706` `ScheduleExportRequest.schedule.cronExpression`	cron	no — API request	parent `api/ScheduleExportRequest:schedule` (leaf not keyed)	`cron-declared-unwired`
5	`automation/execution.zod.ts:454` `ScheduleState.cronExpression`	cron	no — runtime state	`automation/ScheduleState:cronExpression`	`cron-declared-unwired`
6	`integration/connector.zod.ts:257` `DataSyncConfig.schedule`	cron	YES — `Connector.syncConfig` at `:774`, and `DeclarativeConnectorEntrySchema` is `ConnectorSchema.superRefine(...)`, which is `defineStack({ connectors })`	`integration/DataSyncConfig:schedule`	`cron-declared-unwired`
7	`system/cache.zod.ts:156` `CacheWarmup.schedule`	cron	no	`system/CacheWarmup:schedule`	`cron-declared-unwired`
8	`system/disaster-recovery.zod.ts:57` `BackupConfig.schedule`	cron	no	`system/BackupConfig:schedule`	`cron-declared-unwired`
9	`system/disaster-recovery.zod.ts:238` `DisasterRecoveryPlan.testing.schedule`	cron	no	parent `system/DisasterRecoveryPlan:testing` (leaf not keyed)	`cron-declared-unwired`
10	`ai/model-registry.zod.ts:121` `PromptTemplate.system`	template	no	`ai/PromptTemplate:system`	`template-prompt` (experimental)
11	`ai/model-registry.zod.ts:122` `PromptTemplate.user`	template	no	`ai/PromptTemplate:user`	`template-prompt` (experimental)
12	`data/object.zod.ts:2083` `ObjectSchemaBase.titleFormat`	template	YES — `defineStack({ objects })`	`data/Object:titleFormat`	`template-title-format` (experimental)

Three of twelve are stack collection members. Nine are not reachable from a stack manifest at all — which bounds what os validate could ever say about them, whatever is decided.

H2 — every author of each site

Brace-aware sweep, 6930 files across packages/**, examples/**, content/docs/**, skills/**, docs/**, apps/**, .changeset/**; generated trees (api-surface/, export-origins/, declaration-map/, json-schema.manifest/, authorable-surface/, authorable-defaults/, liveness/, docs/, prompts/), dist, node_modules and CHANGELOGs excluded. An author is a position that supplies a value to the slot.

Three families that look like authors and are not

Naming these matters, because a naive key-name grep counts them and they change every number:

plugin-reports / client cronExpression (report-service.test.ts:327-354, client.test.ts:462) — the report-schedule contract, a plain TS interface at contracts/report-service.ts:105, never the zod schema. Worth the seat's attention anyway: report-service.ts:604-612 validates the cron eagerly at create time with new Cron(...) and throws VALIDATION_FAILED, with the comment "Validate eagerly so an author gets a clear error at schedule time instead of a schedule that silently falls back to interval on sweep." That is the anchor card's own symptom, already solved once in this repo — at the service, not the spec.
trigger-schedule and the flow start-node config.schedule — schedule-trigger.ts:103 normalizeSchedule is a hand-rolled parser over { type: 'cron' | 'interval' | 'once' } plus shorthands; it never touches CronExpressionInputSchema.
service-job adapters — they take the boundary interface JobSchedule (contracts/job-service.ts:34, expression?: string), a plain TS type.

Excluding those removes 84 of 130 raw type: 'cron' hits.

Site 1 — `CronSchedule.expression` (the only wired slot)

46 author positions through the schema:

bucket	positions
`packages/**` tests + fixtures	28
`packages/**` source + docblocks	12
`content/docs/**`	3
`skills/**`	2
`examples/`**	1 — `app-showcase/src/automation/jobs/index.ts:20`, `'0 1 * * *'` (the positive control for this sweep; it fires)
`docs/qa/**`, objectui	0

Nine distinct bare-string values: 0 * * * *, 0 0 * * *, 0 0 * * 0, 0 1 * * *, 0 2 * * *, 0 3 * * *, 0 8 * * *, 0 9 * * *, 0 9 * * MON-FRI. Zero envelope authors outside two negative fixtures.

Sites 2-11

site	authors	where
2 `KnowledgeRefreshPolicy.cron`	9	`spec/src/ai/knowledge-source.test.ts` only (the #15029 pin file)
3-4 export `cronExpression`	8	`spec/src/api/export.test.ts` (7) + the `export.zod.ts:562` docblock
5 `ScheduleState.cronExpression`	5	`spec/src/automation/execution.test.ts` only
6 `DataSyncConfig.schedule`	3	`spec/src/integration/connector.test.ts:234`, `connector-author-shape.test.ts:437,469`. Zero in `examples/`** — control: examples DO declare connectors in 3 files, so the sweep reaches that tree
7 `CacheWarmup.schedule`	1	`spec/src/system/cache.test.ts:245`
8-9 DR `schedule`	4	2 docblocks (`:19`, `:187`) + 2 tests (`:61`, `:168`)
10-11 `PromptTemplate.system` / `.user`	10	`spec/src/ai/model-registry.test.ts` only. Zero elsewhere in any tree, objectui included

Eight of the twelve positions have no author outside packages/spec's own tests and docblocks.

Site 12 — `Object.titleFormat`

The outlier, by two orders of magnitude. 75 value positions, 73 string literals:

71 single-brace {field} — 38 platform-objects, 18 plugins, 11 services, 3 lint, 1 each spec / metadata-protocol / cli.
2 double-brace {{record.field}} — both in one lint test.
2 docs positions.
Zero in examples/** — control: nameField IS authored there (app-todo/src/objects/task.object.ts:209), so the tree is reached; the examples already migrated per ADR-0079.

The spec declares this slot's dialect as template, whose declared syntax is double-brace. 71 of 73 authors write the other one. Filed as #15947 with the objectui measurement that explains why.

objectui, at the pin

.objectui-sha is a472b07167a39e55491109e864bb5a54027dcfbd and the checkout's HEAD equals it, so this is a first-hand reading, not a second-hand claim.

Zero cron authors, zero prompt-template authors. No cronExpression, no CronExpressionInputSchema, no cron envelope anywhere.
titleFormat: one fixture author writing a third spelling, '${subject}', that no interpolator resolves — and the real interpolator, packages/core/src/utils/record-title.ts formatTitleTemplate, which reads the envelope's .source, rewrites {{...}} down to {...}, then interpolates single-brace. This settles the D7 template-title-format row's explicitly open cell. See spec/data: Object.titleFormat is typed template dialect (declared {{var}}), but the only implementation reads single-brace {field} — and 71 of 73 in-repo authors write single-brace #15947.

H3 — what a narrowed envelope arm would refuse today (#15028)

Scratch probe outside both trees, tsx over packages/spec/src/shared/expression.zod plus a scratch narrowed copy (ExpressionSchema.safeExtend({ dialect: z.literal('cron') }) and the template equivalent).

corpus	n	green today	green NARROWED	delta
cron author values	32	32	31	1
template author values	14	14	12	2

The one cron refusal is { dialect: 'cel', source: 'now()' }, which appears twice in the tree (runtime/src/job-schedule.test.ts:78 and app-plugin.jobs.test.ts:127) — and neither reaches the schema: the first hands a raw object to toBoundaryJobSchedule, the second constructs new AppPlugin({ jobs: [...] }), and app-plugin.ts:1005 reads this.collections.jobs raw and calls toBoundaryJobSchedule at :1050 without ever parsing through JobSchema. The two template refusals are exactly the synthetic shapes #15028's body names.

So: narrowing the envelope arm refuses ZERO measured author values and flips ZERO existing pins. The migration measurement the Clause-2 process asks for is done, and its answer is empty.

Control: { dialect: 'js', source: 'x' } stays invalid_union under the current schema and the narrowed one, so the narrowed copy is not simply refusing everything.

H4 — what a parse-time cron grammar would refuse, and what `os validate` says today

The two truths, quantified

packages/formula/src/cron-engine.ts validate (transcribed verbatim) against croner 10.0.1, over 32 patterns — in-repo author values plus edge shapes:

agree 27 · DISAGREE 5 · always in the same direction: formula accepts, croner refuses.

'0 0/6 * * *'   formula ACCEPT | croner REFUSE  stepping with numeric prefix ('0/6') is not supported
'@reboot'       formula ACCEPT | croner REFUSE  @reboot is not supported in this environment
'0 0 * * 8'     formula ACCEPT | croner REFUSE  Invalid value for dayOfWeek: 8
'61 * * * *'    formula ACCEPT | croner REFUSE  Invalid value for minute: 61
'0 0 32 * *'    formula ACCEPT | croner REFUSE  Invalid value for day: 31

The cause is structural, not a bug list: formula's grammar is a character-class check per field (/^[\d*\/,\-?LWA-Z#]+$/i) with a field count, and no range check at all. Two of the five are live in the tree today — '0 0/6 * * *' is a shipped docblock example (filed as #15945) and @reboot is advertised in formula's own docblock as accepted.

This is decisive for shape (b) as the card states it. Routing authors through cronEngine.parse would hand them a verdict weaker than the scheduler's: 61 * * * * goes green at author time and throws inside croner at schedule time — the exact symptom this card exists to close, now wearing a validator's clothes.

What `os validate` says today

os validate is two legs (packages/cli/src/commands/validate.ts:207 and :246).

Leg 1, measured. A stack carrying 'not a cron' in both stack-reachable cron keys plus a malformed titleFormat:

success: true
  jobs[0].schedule.expression       -> {"dialect":"cron","source":"not a cron"}
  connectors[0].syncConfig.schedule -> {"dialect":"cron","source":"not a cron"}
  objects[0].titleFormat            -> {"dialect":"template","source":"not a template at all {{{"}

Control: flipping one field's type to 'not_a_field_type' turns the same parse RED at objects.0.fields.name.type. So the green is a reading.

Leg 2, measured statically and declared as such. runAuthoringRules could not be executed here — @objectstack/lint resolves @objectstack/formula's dist, and building formula is outside this claim's allowed heavy step. Static instead: zero hits for croner, new Cron or any cron-pattern check anywhere in packages/lint/src non-test. Control: 5 lint files DO judge expressions via validateExpression / parseCelToAst. The only rule that fires on any of the twelve is title-format-retired (validate-record-title.ts:33), an advisory warning on the key's presence, never on the text.

Reachability bound: only 2 of the 7 cron keys are reachable from a stack manifest at all, so os validate could never have an opinion on the other five however the dialect is changed.

H5 — deliberate or not (#15028's own question): NOT deliberate

REST commits-by-path, because the clone is shallow and no local log -S was trusted. Nine commits have ever touched shared/expression.zod.ts. The typed schemas arrive in bbf8d44cd, 2026-05-08 — and it has zero associated PRs: no PR body, no issue number, no review record.

Four independent pieces of evidence, all pointing one way:

The diff is a copy. Both typed schemas are ExpressionInputSchema's union with only the transform's dialect literal changed. The second arm, ExpressionSchema, is carried over verbatim and untouched.
Both docblocks describe only the bare-string arm ("a bare string is shorthand for..."). Neither says anything about the envelope arm — there is no sentence to read as a decision.
The sentence the card asks about predates the typed schemas. At the parent commit a62d4ae9e, "Engines that need other dialects must use the full envelope" is already on ExpressionInputSchema at :78, at a time when CronExpressionInputSchema did not exist. It is a statement about the untyped schema's cel default, not a decision about typed arms.
The recorded intent was engine-validates. The same commit created both engines: "Introduced cronEngine and templateEngine for validating and evaluating cron and template expressions". The cron engine never acquired a caller — measured again above.

The permissive envelope arm is an inherited artifact of a bulk retype, not a design decision. It was never argued for, so narrowing it reverses nothing.

H6 — cost table

	(i) narrow the envelope arm	(ii) parse-time cron grammar	(iii) record and close	(iv) enforce-or-remove
author values refused	0 of 46 measured	2 of 32 cron (`'not a cron'`, `' '`), plus `'0 0/6 * * *'` if croner-sourced	0	n/a
fixtures to migrate	0	the #15029 pin's `'not a cron'` case; `#15945`'s docblock	0	every author of a retired key: 8 sites have authors only in spec's own tests
pins to flip	0 — the two mismatched-envelope fixtures never reach the schema	`knowledge-source.test.ts:96-104` by construction; its own header says so and says to rewrite the describe in the same commit	0	the D7 rows plus each key's liveness entry
new sources of truth	0	1 restated grammar — and the two that exist already disagree on 5 of 32	0	0 (removes one)
published keys touched (Clause 2)	12	9	0	up to 8
verdict actually gained	dialect is pinned at the type that names it	a verdict on 1 wired key of 7; weaker than the scheduler if formula-sourced	none — the state becomes findable	the declaration stops outliving the implementation

The per-axis analysis and the recommendation are in the report JSON's open_questions.

Generated by Claude Code

Seat position on the shared-dialect trio (#15035 · #15028 · #15027) — formed from the census (domain:spec seat, `session_01M59rPZZFzqhfMUPFqqZTkf`, 2026-09-05T15:58Z)

Provenance: the folded measurement dispatch (census report 5552934813 on this card, member report 5552938986 on #15028; readings on origin/main f1e91595f, nothing edited, branch claude/issue-15035-cron-dialect-author-census an empty marker), the #15527 dev's reader measurement (5551551797 / 5551552092, landed as PR #15877), and triage's instruction on all three cards to form one position rather than dispatch three times. #15027 is closed (cli lane): the D7 ledger now carries rows for all 12 typed positions.

Measured facts the position rests on

The 12 typed positions (9 cron incl. ai/knowledge-source.zod.ts, 3 template) have 32 cron and 14 template author values in this repo, the examples, the docs, the skills and the objectui pin — every one a bare string or a same-dialect envelope. A narrowed envelope arm refuses ZERO real authors (the three refusals are two synthetic shapes from [finding] CronExpressionInputSchema / TemplateExpressionInputSchema fix the dialect only on the bare-string arm — the envelope arm accepts any declared dialect, so a cron-typed slot parses { dialect: 'cel', source } green #15028's own body and one deliberate negative fixture handed raw to toBoundaryJobSchedule, never parsed by the schema) and flips zero pins.
The typed schemas landed in bbf8d44cd (2026-05-08) with no PR and no design note, as copies of ExpressionInputSchema with only the transform's dialect literal changed — [finding] CronExpressionInputSchema / TemplateExpressionInputSchema fix the dialect only on the bare-string arm — the envelope arm accepts any declared dialect, so a cron-typed slot parses { dialect: 'cel', source } green #15028's "deliberate or not" is answered: not deliberate.
The repo's two cron grammars already disagree: formula's cronEngine accepts 5 of 32 probed patterns that croner (the only parser the platform runs) refuses ('61 * * * *', '0 0 32 * *', '0 0/6 * * *', '@reboot', '0 0 * * 8'). Only 1 of the 7 cron keys reaches any scheduler; 8 of the 12 typed positions have no reader of any kind; only 2 cron keys are reachable from a stack manifest at all.
Correction to this card's body: the bare-string arm's .min(1) does not trim, so a whitespace-only string parses green on every cron and template slot — the shape EvaluatedExpressionSchema (same file) already refuses for evaluated CEL slots.

Position — decided within lane authority (triage: all shapes are the seat's; a narrowing goes through Clause-② contract review)

(i) Narrow the envelope arm on the typed schemas — CronExpressionInputSchema accepts a bare string or a { dialect: 'cron', source } envelope only; TemplateExpressionInputSchema likewise for template. Measured cost: zero author migrations, zero pin flips. Plus the whitespace correction: the bare-string arm refuses a blank/whitespace-only string on both typed schemas, the way EvaluatedExpressionSchema does. Both are accept-set narrowings on 12 published authorable keys ⇒ Clause-②: yes, in-seat contract review, carriers on the PR and both cards.
(iii) Record the parse-time position and close [finding] The shared cron dialect judges no cron syntax at parse time — after #14825 all 9 CronExpressionInputSchema sites accept 'not a cron' green; the verdict is the formula cron-engine's at evaluate time #15035 — no cron syntax is judged at parse time; croner judges it where a schedule is wired; the describes ([finding] KnowledgeSourceSchema.cron is documented as a 5-field cron expression but typed z.string() — the spec's own CronExpressionInputSchema is not used, so 'not a cron' parses green #14825, docs(spec): the dialect table's cron row names what fires a schedule — cron-parser is not in the product #15877) already say so. The PR records this in its changeset and, where the ADR-0049 / D7 ledger has a row for the shared dialect, on that row. Not (ii): a restated grammar would be a third source of truth in a repo whose two existing ones already disagree, and a cronEngine-sourced one would green-light patterns the scheduler refuses — a lenient verdict in strict clothing.
(iv) escalated, not decided here: eight of the twelve typed positions (six cron keys, two prompt-template keys) are declared, documented, and read by nothing — ADR-0049 enforce-or-remove candidates whose retirement is a maintainer ruling (as spec: hour/minute/day-shaped deadline keys in incident-response, training, change-management and ESignature schemas have zero readers and no EXPERIMENTAL tag (ADR-0049 shape) #14477 / spec: the rest of the incident-response, training and change-management families — every remaining key and all fifteen defs — has zero readers; whole-def enforce-or-remove is the open question left after #14477 #15513 were). The seat files a decision card with the census evidence and the four-facet block; it is sequenced AFTER the narrowing PR (which touches only the two union definitions and leaves the sites alone).

Execution: one implementation dispatch under the existing claims (new branch, new Claim: lines on both cards with Clause-②: yes), one PR closing #15028 and #15035 (Fixes both). Dev-filed #15945 (a shipped BackupConfig cron example croner refuses) and #15947 (titleFormat's declared {{var}} dialect vs objectui's single-brace implementation, 71 of 73 authors single-brace) are concrete defects left unlabelled for triage; #15867 (the knowledge-source describe's attribution) stays a sub-issue of this card and moves when the sentence it needs is settled — under this position it is settled: no engine evaluates that slot.

Process conflict raised by the dev, answered: AGENTS.md (line 400) is right and the dispatch line "post your own dev claim comment" was wrong — a dispatched executor posts no second claim; the seat's Claim: is the identity and the report is the record. The line leaves this seat's dispatch orders as of this comment; recorded as a skills-lane increment for the shift report.

Generated by Claude Code

Claim: PM loop round R2 — domain:spec seat, session_01M59rPZZFzqhfMUPFqqZTkf, 2026-09-05T15:58Z — implementation lap after the census, member of the two-card fold now anchored on #15028 (one dev, branch claude/issue-15028-typed-expression-envelope-dialect, mode:subagent, tier claude-fable-5-1; the full claim is on #15028, the seat's position is 5552964624 above). This card closes with the same PR under position (iii): the parse-time state is recorded, the whitespace-only acceptance this card's body missed is refused, and no grammar is restated. The measurement claim 5552812090 is superseded by this line for branch identity.

Clause-②: yes

Generated by Claude Code

os-dev-report

{
  "issue": 15035,
  "status": "done",
  "branch": "claude/issue-15028-typed-expression-envelope-dialect",
  "pr": "https://github.com/objectstack-ai/objectstack/pull/16001",
  "premise_still_valid": true,
  "summary": "Member of the two-card fold anchored on #15028; the full os-dev-report is comment 5553830095 on #15028. This card closes with the same draft PR under position (iii): no cron syntax is judged at parse time; `croner` judges it where a schedule is wired; no grammar is restated in spec -- recorded verbatim in the changeset and on the D7 `cron-declared-unwired` note (text only). The census's correction to this card's body is now enforced: the bare-string arm of both typed schemas refuses a blank (empty or whitespace-only) string with ONE named `invalid_union` at the slot, the `EvaluatedExpressionSchema` rule and shape; `'not a cron'` still normalizes, pinned. The envelope arm is narrowed to the slot's own dialect literal (#15028's half).",
  "tests": "See the anchor report: spec suite 477 files / 12824 tests green; spec + five downstream typechecks green; consumer tests green; ablation of the cron literal turned exactly the five predicted pins red and was restored with blob-hash proof; 95 derived gate families, 95 run, 0 unrun, `check:dual-build-cjs-loads` NOT MEASURED locally (needs the whole repo built; CI's). CI on the PR: in_progress at report time.",
  "mcp_calls": "4 -- counted once on the anchor report.",
  "open_questions": [],
  "out_of_scope_findings": []
}

Draft PR: #16001 (Fixes #15028, Fixes #15035).

Generated by Claude Code

Fold member note: the anchor's PR #16001 is ACCEPTED with Clause-② PASS at b2b216ea3 (#15028 comment 5553844468, 2026-09-05T18:20Z); position (iii) — no cron syntax judged at parse time, croner judges it where a schedule is wired, no grammar restated in spec — is recorded in the changeset and the D7 ledger note, and this card closes by the PR (Fixes #15035). Carrier re-cycled at that head below; landing waits on main green (#15992 → PR #16002).

Generated by Claude Code

Fold member: PR #16001 flipped to ready + auto-merge (squash) at 22:28Z on 6d4fc4218, all checks green — provenance on #15028; this card closes with the PR (Fixes #15035).

Generated by Claude Code

Landed (fold member; domain:spec seat, session_01M59rPZZFzqhfMUPFqqZTkf, 2026-09-05T23:26Z): PR #16001 merged 2026-09-05T23:23:03Z as f81afe3b7 through the merge queue (squash; enqueued 22:28:51Z). Probe and provenance are on the anchor card #15028 (git grep -c TYPED_EXPRESSION_DIALECT_ONLY origin/main -- packages/spec/src/shared/expression.zod.ts = 4 at tip 31403453d, control 0 at f7db8f4fd).

Release: session_01M59rPZZFzqhfMUPFqqZTkf — reason: landed, card closed by Fixes #15035 — destination: none (closed). Same stroke: pm:dispatched stripped, assignee cleared. The parse-time cron-syntax question this card raised is #15954 in the decision inbox; position (iii) of the fold (no cron syntax judged at parse time) stands as landed.

Generated by Claude Code

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[finding] The shared cron dialect judges no cron syntax at parse time — after #14825 all 9 `CronExpressionInputSchema` sites accept `'not a cron'` green; the verdict is the formula cron-engine's at evaluate time #15035

What

Why it matters

Not a decision — three shapes for triage

Verified

⭐ 与 #15028 同文件、同联合体 —— 建议同一次派发,⛔ 但不合卡

分诊（半状态补齐）· `pm:queue` 补上 · `priority:p2` / `domain:spec` / `finding` 维持

⭐ 最重要的一条：这是同一个文件上的三张卡，⛔ 不要分别裁

为什么是 `pm:queue` 而不是决策箱

`priority:p2` 维持

⭐ 去重方法值得表扬

Census — the shared cron/template dialect, author half

Premise check first — two corrections, the headline premise holds

Reader half — re-verified on `f1e91595f`, no drift

H1 — the twelve typed positions on today's tree

H2 — every author of each site

Three families that look like authors and are not

Site 1 — `CronSchedule.expression` (the only wired slot)

Sites 2-11

Site 12 — `Object.titleFormat`

objectui, at the pin

H3 — what a narrowed envelope arm would refuse today (#15028)

H4 — what a parse-time cron grammar would refuse, and what `os validate` says today

The two truths, quantified

What `os validate` says today

H5 — deliberate or not (#15028's own question): NOT deliberate

H6 — cost table

Seat position on the shared-dialect trio (#15035 · #15028 · #15027) — formed from the census (domain:spec seat, `session_01M59rPZZFzqhfMUPFqqZTkf`, 2026-09-05T15:58Z)

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[finding] The shared cron dialect judges no cron syntax at parse time — after #14825 all 9 CronExpressionInputSchema sites accept 'not a cron' green; the verdict is the formula cron-engine's at evaluate time #15035

Description

What

Why it matters

Not a decision — three shapes for triage

Verified

Activity

os-zhuang commented on Sep 4, 2026

⭐ 与 #15028 同文件、同联合体 —— 建议同一次派发,⛔ 但不合卡

os-zhuang commented on Sep 5, 2026

分诊（半状态补齐）· pm:queue 补上 · priority:p2 / domain:spec / finding 维持

⭐ 最重要的一条：这是同一个文件上的三张卡，⛔ 不要分别裁

为什么是 pm:queue 而不是决策箱

priority:p2 维持

⭐ 去重方法值得表扬

os-project-manager commented on Sep 5, 2026

claude commented on Sep 5, 2026

claude commented on Sep 5, 2026

Census — the shared cron/template dialect, author half

Premise check first — two corrections, the headline premise holds

Reader half — re-verified on f1e91595f, no drift

H1 — the twelve typed positions on today's tree

H2 — every author of each site

Three families that look like authors and are not

Site 1 — CronSchedule.expression (the only wired slot)

Sites 2-11

Site 12 — Object.titleFormat

objectui, at the pin

H3 — what a narrowed envelope arm would refuse today (#15028)

H4 — what a parse-time cron grammar would refuse, and what os validate says today

The two truths, quantified

What os validate says today

H5 — deliberate or not (#15028's own question): NOT deliberate

H6 — cost table

claude commented on Sep 5, 2026

Seat position on the shared-dialect trio (#15035 · #15028 · #15027) — formed from the census (domain:spec seat, session_01M59rPZZFzqhfMUPFqqZTkf, 2026-09-05T15:58Z)

claude commented on Sep 5, 2026

os-project-manager commented on Sep 5, 2026

claude commented on Sep 5, 2026

claude commented on Sep 5, 2026

claude commented on Sep 5, 2026

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Issue actions

[finding] The shared cron dialect judges no cron syntax at parse time — after #14825 all 9 `CronExpressionInputSchema` sites accept `'not a cron'` green; the verdict is the formula cron-engine's at evaluate time #15035

分诊（半状态补齐）· `pm:queue` 补上 · `priority:p2` / `domain:spec` / `finding` 维持

为什么是 `pm:queue` 而不是决策箱

`priority:p2` 维持

Reader half — re-verified on `f1e91595f`, no drift

Site 1 — `CronSchedule.expression` (the only wired slot)

Site 12 — `Object.titleFormat`

H4 — what a parse-time cron grammar would refuse, and what `os validate` says today

What `os validate` says today

Seat position on the shared-dialect trio (#15035 · #15028 · #15027) — formed from the census (domain:spec seat, `session_01M59rPZZFzqhfMUPFqqZTkf`, 2026-09-05T15:58Z)