Function replacers and two-argument revivers support nested replacements, object-property deletion, and thrown exceptions.
Omitting the root through a replacer returns `undefined`.
Array replacers list the object keys to serialize, as in Node.js.
Stored `JSON.stringify` functions accept numeric and string indentation; direct calls require literal indentation.

Reviver source contexts are unsupported.
A reviver that deletes an array element throws, because checked arrays cannot represent holes.

Callback values use checked storage.
Typed records and arrays retain identity and mutations; record fields use declaration order; typed-array views retain backing storage and brands.
`Buffer.isBuffer` preserves the Buffer brand through `unknown`.
JavaScript callbacks receive the holder as `this`; TypeScript callbacks that access dynamic `this` are unsupported.