docs(spec): record text.value as deliberately omitted (#13670)

content/docs/references/ui/expression-bindable-text-keys.mdx

@@ -67,8 +67,16 @@ at the top level (`alert`/`empty`/`dialog` `title`+`description`, `badge`
 `label`, form inputs' `value`/`label`, …) — those rows are deliberately NOT
 declared yet: form-control `value` is interactive state rather than display
 text, and each row is an accept-surface widening that should arrive with its
-own measurement, not ride this one (startup scope discipline). Adding a row
-is additive and spec-first; do it here, never as a renderer-side inference.
+own measurement, not ride this one (startup scope discipline). `text` reads
+back `schema.content || schema.value` (`basic/text.tsx`) — unlike the rows
+above, its omission is not merely unmeasured: `value` there is a fallback
+spelling for the same slot `content` already evaluates (see `content` NOT a
+member, above), not a second read point, so a `text: ['value']` row would
+legitimize the fallback spelling and give one slot two declared evaluation
+paths. The objectstack#13670 ruling settled `text`'s intended evaluation
+channel as `content` alone and declared `text.value` OUT on those grounds —
+this omission is deliberate, not pending measurement. Adding a row is
+additive and spec-first; do it here, never as a renderer-side inference.
 
 <Callout type="info">
 **Source:** `packages/spec/src/ui/expression-bindable-text-keys.zod.ts`

packages/spec/src/ui/expression-bindable-text-keys.zod.ts

@@ -63,8 +63,16 @@
  * `label`, form inputs' `value`/`label`, …) — those rows are deliberately NOT
  * declared yet: form-control `value` is interactive state rather than display
  * text, and each row is an accept-surface widening that should arrive with its
- * own measurement, not ride this one (startup scope discipline). Adding a row
- * is additive and spec-first; do it here, never as a renderer-side inference.
+ * own measurement, not ride this one (startup scope discipline). `text` reads
+ * back `schema.content || schema.value` (`basic/text.tsx`) — unlike the rows
+ * above, its omission is not merely unmeasured: `value` there is a fallback
+ * spelling for the same slot `content` already evaluates (see `content` NOT a
+ * member, above), not a second read point, so a `text: ['value']` row would
+ * legitimize the fallback spelling and give one slot two declared evaluation
+ * paths. The objectstack#13670 ruling settled `text`'s intended evaluation
+ * channel as `content` alone and declared `text.value` OUT on those grounds —
+ * this omission is deliberate, not pending measurement. Adding a row is
+ * additive and spec-first; do it here, never as a renderer-side inference.
  */
 
 import { z } from 'zod';