Issues with Schema Reuse and Degenerate Encoding Function in Transform Definition

import { Effect, Schema as S } from "effect"

const ScalarResult = <V extends S.Schema<any, any, unknown>>(value: V) =>
    S.transform(S.Tuple(S.Record({key: S.String, value})), value, {
        decode: a => Object.values(a[0])[0]!,
        encode: a => [{value: a as V['Type']}] as const,
    });

const True = S.Literal(1)

const Exists = ScalarResult(True)

const program = Effect.gen(function*() {
  const result = [{ "exists": 1 }];

  const exists = S.is(Exists)(result);
  console.log(exists); // false whether the value is `0` or `1`

  const decoded = S.decodeUnknown(Exists)(result);
  console.log(decoded) // 1 if decoding did not fail
})