Schema.d.ts references SchemaAST.Sentinel, which @internal-stripping removes from the published SchemaAST.d.ts — consumers without skipLibCheck fail to compile #7187

Status: work in progress. Filing early to track the defect; I will follow up with a minimal reproduction repository.

What happens

The published effect package's dist/Schema.d.ts references SchemaAST.Sentinel in a public type:

// dist/Schema.d.ts (4.0.0-beta.107, line ~10815)
readonly "~sentinels"?: ReadonlyArray<SchemaAST.Sentinel> | undefined;

but Sentinel is declared /** @internal */ in src/SchemaAST.ts (~line 2515), so it is stripped from the published dist/SchemaAST.d.ts (zero occurrences). Any consumer whose tsconfig does not set skipLibCheck: true fails to compile:

node_modules/effect/dist/Schema.d.ts(10815,57): error TS2694: Namespace '".../effect/dist/SchemaAST"' has no exported member 'Sentinel'.

Observed on 4.0.0-beta.105 and still present on 4.0.0-beta.107, with both tsc (TypeScript 7.0.2) and tsgo.

Expected

The published declaration set should be self-consistent: either Sentinel ships in SchemaAST.d.ts (drop the @internal, or exempt it from stripping since a public type references it), or the ~sentinels member's declared type avoids the internal name.

Workaround

Local patch appending the two-field type back onto dist/SchemaAST.d.ts:

export type Sentinel = {
    readonly key: PropertyKey;
    readonly literal: LiteralValue | symbol;
};

Reproduction repo to follow.