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Katerina Skroumpelou dac5756295 docs(auth): add server-side package disambiguation guide (#47966)
Adds a docs guide, "Choosing a server-side package", that explains when
to use `supabase-js`, `@supabase/ssr`, or `@supabase/server` when
working with Supabase from JavaScript on the server. It includes a
decision table and a short code example for each, with one rule up
front: cookie-based sessions in SSR frameworks use `@supabase/ssr`,
per-request header auth in Edge Functions and other backend runtimes
uses `@supabase/server`, and `supabase-js` is the base client both wrap.

The guide is surfaced from the Auth overview page and the sidebar, and
is cross-linked from the `supabase-js` and `@supabase/server` reference
introductions so it is reachable from where developers start. It also
states that the packages coexist and are not replacements for each
other, and keeps combining `@supabase/server` with `@supabase/ssr` as an
advanced section.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added a guide explaining how to choose between Supabase server-side
JavaScript packages.
- Added the guide to Auth navigation and the getting-started content
listings.
- Added links to the new guidance throughout relevant JavaScript and
server documentation.
- **Documentation**
- Clarified when to use cookie-based sessions versus header-based
authentication.
- Added package comparisons, usage examples, advanced guidance, and
related next steps.
- Updated spelling support for framework names used in the
documentation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
2026-07-16 15:29:00 +03:00
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