Version Packages#417
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dferber90
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Jun 27, 2026
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This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.
Releases
@flags-sdk/vercel@1.4.3
Patch Changes
f60c99d]:@vercel/flags-core@1.5.2
Patch Changes
#416
f60c99dThanks @dferber90! - Fix datafile serialization across the RSC server/client boundary.Evaluation memoized scaled split weights and compiled regexes by attaching
symbol-keyed properties directly onto objects inside the datafile. While
symbols are invisible to
JSON.stringify, React Server Components serializationwalks objects directly and chokes on these (notably the non-serializable
RegExp), so datafiles could no longer be passed from server to clientcomponents. Memoization now uses module-level
WeakMaps keyed by theoutcome/rhs objects, leaving datafile objects pristine while keeping identical
caching semantics and lifetime.
Note
Low Risk
Release-only version and changelog updates; the underlying fix is an isolated evaluation caching change with no auth or API surface changes in this diff.
Overview
This is a Changesets release PR: it bumps
@vercel/flags-coreto 1.5.2 and@flags-sdk/vercelto 1.4.3, updates both packages’ CHANGELOG entries, and removes the consumed changeset file.The release documents the patch from #416: evaluation memoization for split weights and compiled regexes no longer mutates datafile objects (moved to module-level
WeakMaps), so datafiles can cross the RSC server/client boundary without serialization failures from attachedRegExpvalues. The Vercel adapter change is only a dependency version bump to pick up@vercel/flags-core@1.5.2.Reviewed by Cursor Bugbot for commit 7f1afa7. Bugbot is set up for automated code reviews on this repo. Configure here.