Schema type with optional properties

[LucasDemea]

Hi, I'm coding a library where developers will be able to define their own schema, which should extend a certain type.
Every property of this type must be optional.

Is this possible with Typebox ? How can I achieve this ?

I tried this :

type CustomSchema = TObject<{
  foo?: TString;
  bar?: TNumber;
  baz?: TBoolean;
}>;

const schema: CustomSchema = Type.Object({
  foo: Type.String(),
  baz: Type.Boolean(),
});

But I get this error

Type 'TObject<{ foo: TString; baz: TBoolean; }>' is not assignable to type 'TSchema'.
  Types of property 'static' are incompatible.
    Property 'bar' is missing in type '{ foo: string; baz: boolean; }' but required in type '{ foo: string; bar: number; baz: boolean; }'.