[v18] retire the `{var}` template dialect in flow assignment slots: refuse at registration with per-spelling remedies (the C half of #11182 ruling D, on the v18 train)

[objectstack-fleet]

History: this line read Restart-when: closed objectstack-ai/objectstack#11182 until 2026-09-27. It fired that day (PR #20205), the timing was ruled (stay on v18, maintainer 「同意」), and the live restart is now the v18-line line in the triage comment of that date.

Filed by the director seat, summon #28 (续) (session_01GLdRPcbaCBQCTvVmU6YEUY), under ruling batch #218 item 1 · letter D on #11182 (record: the Ruling: comment on that card, maintainer 「11182 D 其他同意」). This is the carrier for the half of the ruling the maintainer put on the v18 train, so it is not dropped silently. ⛔ Not a claim. pm:on-hold by the ruling; it returns to the decision box when #11182's A leg lands (the Restart-when: above), for the timing ruling — ⛔ do not implement from this card without that second ruling.

What rides here (when v18 opens)

1. C — refuse the template dialect at registration. A flow assignment / fields.* value written in the {var} template dialect is refused at registration with a per-spelling remedy, in Flow field expressions can call no function but NOW()/TODAY() — every other identifier is rewritten to null, so a computed money value can never be rounded to its field's declared scale #11060 A's loud shape: round(x * 100) / 100 → / 100.0 (CEL integer division would truncate money); an absent key → a has() guard (CEL faults where the template gave undefined); NOW() / TODAY() in a text slot → the string form (the round measured that CEL yields a Timestamp and this engine has no string(timestamp) — a packages/formula sub-card if v18 needs it).
2. B, only where lossless. An ADR-0087 D2 conversion for the spellings the [Deferred by ruling] Unify flow field-expression assignment onto the CEL engine — the B half of the #11060 ruling, awaiting maintainer appetite #11182 round measured as SAME under both engines (13 of 25); the 12 DIFF spellings are ⛔ never auto-converted (a semantic rewrite is not a conversion).
3. HotCRM's 92 sites migrate against this card behind HotCRM's pin (a hotcrm card at that time); this repo's 21 sites migrate in the same wave.

Readings this carrier rests on: the #11182 measurement 5795796051 / 5795832575 (113 sites; 106 in fields.*; 13 SAME / 12 DIFF; the three DIFF classes above). ADR-0087 D2 is why B cannot ride 17.x.

Dedupe: template dialect retire v18 · {var} refuse registration remedy · #11182 C half.

[objectstack-fleet]

Restart-when: packages/spec/package.json on objectstack main carries a version matching ^18., or .changeset/pre.json exists there (the v18 line opens; gate #15193)

Timing ruled: this card stays on the v18 train. Its restart moves from "#11182 closed" (now met) to "the v18 line opens"

Triage seat (objectstack-wide, seat post #6015) · session_01W89enF2dYV7K4N2Fbfj33f · 2026-09-27T15:57Z. ⛔ Not a claim, ⛔ not a dispatch.

Provenance: who — the maintainer; verbatim — 「同意」, answering the triage seat's on-hold cleanup plan (which named this card and this disposition); where — the maintainer's chat with the triage session session_01W89enF2dYV7K4N2Fbfj33f, 2026-09-27. The plan asked 「A — stay on v18 (recommended) or B — refuse in 17.x now」, and the answer was the plan as recommended: A.

• The old condition fired. [Deferred by ruling] Unify flow field-expression assignment onto the CEL engine — the B half of the #11060 ruling, awaiting maintainer appetite #11182 closed completed today (PR feat(spec,automation): create_record / update_record fields.* accept the CEL value envelope — declared and evaluated together #20205 merged 15:47Z, the A leg). This card said it would then return for the timing ruling.
• Why v18 (the reason the ruling rests on). Of the 25 measured spellings, 13 convert losslessly (B). ADR-0087 D2 lets that conversion ride only a major, and main carries no major changesets until the v18 line opens. Refusing now (C without B) would force a hand migration of all 113 sites, 92 of them in hotcrm. On v18, C and B land together.

This act: the body's satisfied Restart-when: closed …#11182 line is rewritten as history. The first line above is the live restart (comment channel), and target:v18 is added. pm:on-hold stays. The execution list in the body is unchanged.