OSS Feed: April 17th, 2026

Welcome to today's OSS digest covering the latest activity from key engineers in the React, Next.js, and TanStack ecosystems.

@acdlite — Andrew Clark

Andrew was actively working on Next.js prefetch optimization, pushing two significant PRs:

Update tests for prefetch inlining (1/n) - Ongoing test updates for the new prefetch system
Enable prefetchInlining by default - Merged a major performance improvement that enables prefetch inlining by default

He also provided extensive code review across multiple Next.js PRs, including work on React RSPack integration and prefetch configuration improvements.

@gaearon — Dan Abramov

Dan focused on community support, providing insights on:

Auth refactor in the ATProto website
Select popover positioning issue in Material-UI when using React.lazy

@tannerlinsley — Tanner Linsley

Tanner continued his TanStack work with active review and guidance on several TanStack Query improvements:

TypeScript autocomplete fix for import path resolution
Refetch interval fix addressing timing issues
ReactQueryConfigProvider unmount fix for config restoration

He's also involved in TanStack support for Payload CMS, expanding TanStack's reach into content management.

@timneutkens — Tim Neutkens

Tim opened a draft PR to Convert test/integration to isolated tests, part of a broader effort to improve Next.js test architecture. He also reviewed several critical Next.js PRs including metadata handling optimizations and edge runtime deprecation.

@bvaughn — Brian Vaughn

Brian addressed user-reported issues in react-resizable-panels:

Separator hover functionality fix after click interactions
Collapsible panel expansion when collapsed on initialization

@TkDodo — Dominik

Dominik had an exceptionally productive day at Sentry, shipping 6 PRs focused on TypeScript improvements:

ESLint rule for prefer-reduce-type-parameter (draft)
API options refactor for open-period endpoint - Merged
Replay actions TopBarSlot fix - Merged
Profile events endpoint refactor
DashboardGrid placeholder height fix - Merged
Replays endpoint API options refactor

This demonstrates his ongoing effort to improve type safety and API consistency across Sentry's codebase.

@phryneas

Phryneas contributed to GraphQL ecosystem discussions and Apollo Client improvements:

GraphQL over HTTP backwards compatibility discussion
Apollo Client refetchQueries fix for useMutation with skip parameter

@markerikson — Mark Erikson

Mark implemented client source attribution improvements across the Replay.io ecosystem:

REPLAY_CLIENT_SOURCE header forwarding in the CLI
X-Client-Info header implementation - Merged
Container traffic tagging - Merged

@kettanaito — Artem Zakharchenko

Artem focused on maintenance and bug fixes for his testing ecosystem:

Type imports fix in vite-plugin-rsc-testing - Merged
Dependencies update for MSW - Merged

He also provided extensive support for MSW users dealing with worker lifecycle issues and integration questions.

Today's Highlight

🚀 Prefetch Performance Revolution: Andrew Clark's enablement of prefetch inlining by default in Next.js represents a significant performance win for the entire Next.js ecosystem. This change will improve initial page load times and navigation performance for millions of Next.js applications.

🔧 Type Safety Push: Dominik's 6-PR surge at Sentry showcases the ongoing industry trend toward better TypeScript integration and type safety in large-scale applications.

Quiet day for: Sebastian Markbåge, Lee Robinson, Theo