# immerjs/immer · RepoSense Release & Migration Intelligence

> Ships `immer@11.2.9` with upstream runtime refinements and. Drop-in upgrade. Migration: None.

## Metadata
- **Repository URL**: https://github.com/immerjs/immer
- **Primary Package**: `immer` (NPM)
- **Categories**: `STATE_MANAGEMENT`
- **Latest Version**: `v11.2.9`
- **Semantic Status**: `COMPATIBLE`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/immerjs/immer/releases.atom

## The Human Context (Plain-English Pitch)
immer is an open-source library and developer tool in the immerjs/immer 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])
Ships `immer@11.2.9` with upstream runtime refinements and. Drop-in upgrade. Migration: None.

## Breaking Changes & Required Actions
- Ships `immer@11.2.9` with upstream runtime refinements and stability fixes from `immerjs/immer`.
- Updates TypeScript declarations and internal module exports for `v11.2.9`.

## Migration Snippet
```ts
npm install immer@11.2.9
```

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

## Zero-Noise Release Timeline
- **v11.2.9** (2026-10-22) [COMPATIBLE]: Ships `immer@11.2.9` with upstream runtime refinements and. Drop-in upgrade. Migration: None.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is immerjs/immer v11.2.9 safe to upgrade in production?
immerjs/immer v11.2.9 is classified as COMPATIBLE (PATCH release). Ships `immer@11.2.9` with upstream runtime refinements and. Drop-in upgrade. Migration: None.

### What breaking changes or compatibility risks exist in immerjs/immer v11.2.9?
No breaking API changes or peer dependency conflicts are recorded for immerjs/immer v11.2.9 in the RepoSense compatibility graph.

### What is the bundle size impact of immer v11.2.9?
Measured bundle size telemetry is currently unavailable for immer v11.2.9; verify build output locally before deploying.

### How do I upgrade immer to v11.2.9?
Upgrade immer to v11.2.9 by running "npm install immer@11.2.9" and applying the migration steps: npm install immer@11.2.9