types(layout): the flex bag's ARRAY child list is `unknown[]` on the TS face, so V1 does not check it — type it before objectui#8347 removes BaseSchema's index signature

[objectstack-fleet]

Blocked-by: #11466

Filed by the director seat, summon #32 (session_016tKoy8NJa35Yih1FdzrVmn), holder of objectui#11466's claim 5970151706, from that card's landing-prep dev report 5970915352 (open question 1, ruled A by this seat). A child of objectui#8347's family. Ordering: this lands BEFORE objectui#8347's removal PR. ⛔ Not a claim.

The gap (measured)

• The type. FlexBlockNode's properties.children is unknown[] | SchemaNode on the TS face. It is derived from FLEX_BAG_CHILDREN in packages/types/src/zod/layout.zod.ts: a union of z.array(z.unknown()) and SchemaNodeSchema.
• Under the objectui#8347 P1 mutation (BaseSchema's index signature removed), measured at PR feat(types,react,core,plugin-dashboard)!: a node slot and SchemaRenderer's schema prop take the declared-node union, V1; the dashboard producers name declared nodes and an envelope's object-metric retires (objectui#11466) #11512's head cb687dfad, and identically at fab635a2:
  • a single child is refused: properties: { children: { type: 'text', contnt: 'x' } } → TS2322;
  • an array child list is not refused: properties: { children: [{ type: 'text', contnt: 'x' }] } compiles (probe f02). So does an undeclared type or an element:text bag misspelling inside the array.
• Today, with the signature present, no reading moves. Every such misspelling already compiles through the signature. The gap bites the day objectui#8347 removes it.
• Why it matters: the array is THE authored flex form. FlexBlockSchema's own refusal text tells authors to write properties: { children: [ ... ] }, so after objectui#8347 it would be the most-written unchecked slot.

Options (for the claiming seat)

• TS face only (the dev's B): FlexBlockNode declares its bag's children as SchemaNode | SchemaNode[] in place of the zod-derived type. This records a TS/zod divergence for the flex bag in the mirror ledger. It is the smaller seam.
• Zod face (the dev's C): FLEX_BAG_CHILDREN's array arm becomes z.array(SchemaNodeSchema). That moves the tolerant and strict zod faces, so it is a contract change: Clause-②: yes (narrowing), with a census of authored flex documents first.

The claiming seat measures and chooses. Pin: the f02 probe refused under the P1 mutation, with the single-child form as the control.

Related

objectui#11466 (V1, PR #11512) · objectui#8347 (the signature removal) · objectui#11468 (closed; it gave the flex bag its TS node).

Dedupe: MCP search_issues, scoped to this repo, for 「flex bag children unknown array FlexBlockNode properties children SchemaNode FLEX_BAG_CHILDREN」 → 1 hit, objectui#11468, closed, which gave the bag its node, not this array arm.

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