[pull] canary from vercel:canary#811
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pull[bot] merged 5 commits intocode:canaryfrom Feb 21, 2026
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Make `stripIsPartialByte` resilient to responses that don't have the
leading `isPartial` marker byte. Instead of unconditionally consuming
the first byte, it now checks whether it's a recognized marker ('~' or
'#') and leaves the stream intact when it isn't.
This also removes the `NEXT_IS_PRERENDER_HEADER` guard that previously
prevented byte stripping for fully static responses. On Vercel, the CDN
can add this header to runtime prefetch responses that do contain the
marker byte, which caused the client to skip stripping — corrupting the
RSC stream and preventing dynamic navigation requests.
…e status (#90164) While metadata is generated using functions defined in many Segments the actual final resolved metadata belongs to the Page Segment specifically. This means that we need to treat the sync IO heuristic for metadata based on whether the Page is considered runtime prefetchable. Co-authored-by: Zack Tanner <1939140+ztanner@users.noreply.github.com>
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