# ReactiveX/rxjs · RepoSense Release & Migration Intelligence

> chore: update nx to latest, simplify config by @JamesHenry. Pre-release build; test in staging. Migration: Low.

## Metadata
- **Repository URL**: https://github.com/ReactiveX/rxjs
- **Primary Package**: `rxjs` (NPM)
- **Categories**: `STATE_MANAGEMENT`
- **Latest Version**: `v9.0.0-beta.0`
- **Semantic Status**: `WARNING`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/ReactiveX/rxjs/releases.atom

## The Human Context (Plain-English Pitch)
rxjs is an open-source library and developer tool in the ReactiveX/rxjs ecosystem. It saves developers from writing repetitive low-level boilerplate from scratch by providing a battle-tested, open-source implementation ready for production.

## Stage 1 Executive Summary ([Core Change] + [Required Action] + [Migration Effort])
chore: update nx to latest, simplify config by @JamesHenry. Pre-release build; test in staging. Migration: Low.

## Breaking Changes & Required Actions
- chore: update nx to latest, simplify config by @JamesHenry in #7428
- feat(rxjs): `expand` no longer supports a scheduler parameter by @benlesh in #7431
- Fix `every` re-entrancy and signature. by @benlesh in #7432
- Fix typo in docstring in connect.ts by @frwdrik in #7446

## Migration Snippet
```ts
npm install rxjs@9.0.0-beta.0
```

## Ecosystem Compatibility Matrix & Graph Warnings
- **TypeScript 5.x** [`COMPATIBLE`]: Ships standard TypeScript declaration files without type regressions.

## Zero-Noise Release Timeline
- **v9.0.0-beta.0** (2026-08-04) [WARNING]: chore: update nx to latest, simplify config by @JamesHenry. Pre-release build; test in staging. Migration: Low.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is ReactiveX/rxjs v9.0.0-beta.0 safe to upgrade in production?
ReactiveX/rxjs v9.0.0-beta.0 is classified as WARNING (PRERELEASE release). chore: update nx to latest, simplify config by @JamesHenry. Pre-release build; test in staging. Migration: Low.

### What breaking changes or compatibility risks exist in ReactiveX/rxjs v9.0.0-beta.0?
No breaking API changes or peer dependency conflicts are recorded for ReactiveX/rxjs v9.0.0-beta.0 in the RepoSense compatibility graph.

### What is the bundle size impact of rxjs v9.0.0-beta.0?
Measured bundle size telemetry is currently unavailable for rxjs v9.0.0-beta.0; verify build output locally before deploying.

### How do I upgrade rxjs to v9.0.0-beta.0?
Upgrade rxjs to v9.0.0-beta.0 by running "npm install rxjs@9.0.0-beta.0" and applying the migration steps: npm install rxjs@9.0.0-beta.0