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8d6c076d14 Include additional prerender metadata about build-time routes (#96080)
Building on top of @agadzik work (see first commit)

Adds prerender route metadata to help downstream consumers understand
the nature of build-time prerenders

We break down prerender taxonomy as follows

routeType describes what the prerender serves:
* `route`: a non-UI endpoint, such as a Route Handler.
* `page`: a page whose route parameters are fully known.
* `shell`: a reusable PPR shell for a parameterized page.
* `fallback`: a fallback that may serve or specialize additional
parameter values.

response describes how complete the static response is:
* `complete`: the prerender contains the completed response.
* `initial`: an initial response is available, but the page UI is
incomplete; in practice this applies to partially prerenderable UI
routes.
* `empty`: there is no initial static response to send.

compute describes the request-time work required:
* `static`: no request-time server compute is needed.
* `resuming`: request-time compute resumes from the static response.
* `blocking`: the initial response is blocked until request-time compute
starts, but it may stream while that compute continues.

`htmlSize` reports the byte size of prerendered HTML when the output has
HTML.

The taxonomy is included only on a prerender group’s canonical primary
output—the HTML output for pages or the response output for Route
Handlers—and is omitted from secondary RSC and segment-data outputs.

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Co-authored-by: agadzik <[email protected]>
2026-07-24 12:00:49 +02:00
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