Optional ReadonlyephemeralAn ADOPTED DEFAULT: the session's memory of what the form showed, not a user assertion. Read like trusted intent (what you see is what you keep), but never persisted — storage saves filter these out, so across sessions an untouched field re-derives today's default.
ReadonlytrustedReadonlyvalue
One user-expressed value.
trustedrecords where it came from, which is what decides whether the input schema runs: UI writes are typed at the call site and stored verbatim, while boundary values (storage, remix, URL, raw server input) are parsed lazily on first read. Entries are immutable, so their object identity doubles as the parse-cache key — each boundary value is parsed exactly once, ever.