[dylanjeffers]

Summary

packages/web/vite.config.ts passed babel-plugin-react-compiler through the babel option of @vitejs/plugin-react-swc. That plugin never runs Babel, so the React Compiler has been a no-op on web. The production bundle on audius.co has no compiler output (0 memo_cache_sentinel markers in the app bundle). Mobile compiles fine through Metro's Babel config.

This switches web to @vitejs/plugin-react 5.1.1, the same version distro already uses with Vite 7, so the existing compiler config takes effect in dev and production builds.

Impact

	Before	After
Compiled memo caches in prod build	0	2,128
Entry bundle (gzip)	632 KB	696 KB
vite build time (local)	~35s	~65s

Lockfile: SWC is removed and web gets its own Babel copies. The only shared change is a patch bump of @babel/helper-string-parser (7.29.7 → 7.29.11).

New build warning: a duplicate className key in harmony's TextInput. The source already destructures className twice (className and className: inputClassName), and the compiler keeps that destructure as is, so behaviour is unchanged.

Testing

• tsc clean; all 204 web tests pass (vitest now compiles through the plugin too)
• Production build served locally: /trending (including the Underground tab), /explore, search, a profile, a track page, sign-in and sign-up forms, and playback from both the track page and a list. No React errors or render loops.
• Dev server: modules are served compiled and /trending renders cleanly
• Not covered: signed-in pages (Feed, Library, Messages, Wallet, Upload, settings), checkout, and SSR. The compiler silently skips functions it can't compile (about 1 in 5 on mobile), so please click through those before approving the Production deploy.

— 💍 Frodo

🤖 Generated with Claude Code

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