Exclude pages from build

[ivarlovlie]

Describe the problem

I have some devonly pages that I use to showcase project components and do general testing with.
I use

export const ssr = import.meta.env.DEV;
export const csr = import.meta.env.DEV;

to hide them from public view, but from my build output it seems that they still get built.
I haven't found a way for the pages to be excluded from the build.

Describe the proposed solution

Being able to exclude pages/layout groups from the build output with something like

export const exclude = true;

would be very nice.

Alternatives considered

No response

Importance

nice to have

Additional Information

Thank you for your consideration.

[dummdidumm]

Somewhat related to #7183, which would profit from the same but for endpoints.

[ivarlovlie]

Although this hasn't been discussed yet, i would like to propose

export const ssr = false;
export const csr = false;
export const prerender = false;

as an alternative to adding a new "exclude" prop.
As a novice sveltekit user, these exports would tell me that the page would not need to be included/rendered at all.

[bartvdbraak]

Has there been any progress on this to exclude pages on production?