Reuse a shared BlockProps record instead of inlining the full Block CSS surface (~95 fields) per component

[jagguji]

Summary

When a component's props extend the Block primitive (Omit<BlockProps, 'children'>), bindgen inlines the entire BlockProps CSS surface (~95 fields) into the generated record, and repeats it for every such component. This is faithful but very verbose and duplicative — it would be much cleaner to reuse a single shared blockProps record (the same way bindgen already reuses JsxDOM.domProps for HTML attributes).

Observed with @juspay/blend-design-system@0.0.37-beta.5 / @juspay/rescript-bindgen@1.2.4.

Example

Tags/types.d.ts:

export type TagProps = Omit<BlockProps, 'children'> & {
    text: string;
    variant?: TagVariant;
    color?: TagColor;
    leftSlot?: ReactNode;
    rightSlot?: ReactNode;
    ...
};

BlockProps (Primitives/Block/Block.d.ts) is a large CSS record — color, position, inset, top/right/bottom/left, zIndex, opacity, padding(+Top/Bottom/Left/Right/X/Y), margin(+...), display, flex*(×8), gap(+row/column), borderRadius(×5), _hover/_focus/_active/... etc.

Generated tagsPrimaryTagConfig ends up with 95 fields, the vast majority of which are the inlined Block CSS surface. The same surface is duplicated across ~14 generated component records here (Tag, and other Block-extending components).

Impact

• Generated *Types.res records are bloated and noisy; the component-specific fields (text, color, …) are buried among dozens of CSS props.
• Heavy duplication across every Block-extending component.
• Harder to read/diff the generated output.

Suggestion

Emit a single shared record (e.g. CommonTypes.blockProps or Primitives.blockProps) for Omit<BlockProps, 'children'> and reference/spread it in each consumer, instead of inlining the full field list per component — analogous to how JsxDOM.domProps is already reused for HTML attribute spreads.

Priority

Low — this is an ergonomics / DRY improvement, not a correctness bug. (The fields themselves are correct; a Tag does accept all Block styling props.)

[jagguji]

Fixed by PR #131 — pure package-local named intersection parts (StyledBlockProps, BaseSkeletonProps) now emit as ONE shared record spread by every consumer (type props = { ...HtmlAttrs.…, ...SkeletonTypes.baseSkeletonProps, own… }). Shadowed/unprovable bases fall back to inline flattening — never a duplicate-label compile error. Blend 0.0.37 baseline shrank ~37%. Fixture: shared-base-records.