route.cache_invalid

Route's cache: isn't immutable, or it keeps an answer a public cache may not hold.

Area 7, HTTP; not declinable; the next step is usually the agent's.

cache: immutable says an answer never changes, so any cache on the way may keep it for a year. It goes on a GET anyone may call, answering 200, and what the route runs can't give personal data, since no erasure reaches a public cache: a field marked personal:, or a standard type that is personal data whatever holds it, such as PhoneNumber or Email, on a field with no mark or as the output's own type (What the compiler checks). immutable is the one thing cache: says.

Here the route needs a signed-in caller, and a public cache would hand what that caller was sent to anyone who asked:

type Note = Text {    max_length: 200}type NoteView = Output {    note: Note}action a_note() -> NoteView {    return NoteView {        note: "Never changes."    }}routes Notes {    prefix: /notes    GET / {        output: NoteView        cache: immutable        run: a_note()    }}

   |20 |         cache: immutable   |         ^^^^^ a public cache would hand it to anyone

Say who may call it, or don't let caches keep it:

GET / {    authentication: RouteAuthentication.none    output: NoteView    cache: immutable    run: a_note()}

See Answers that never change.