# blitz-js/blitz · RepoSense Release & Migration Intelligence

> 83b6be7: Upgrade cookie-session dependency to v2.1.1. Drop-in upgrade. Migration: None.

## Metadata
- **Repository URL**: https://github.com/blitz-js/blitz
- **Primary Package**: `@blitz-js/blitz` (NPM)
- **Categories**: `FRAMEWORK`, `BACKEND`
- **Latest Version**: `v3.0.2`
- **Semantic Status**: `COMPATIBLE`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/blitz-js/blitz/releases.atom

## The Human Context (Plain-English Pitch)
@blitz-js/blitz is an open-source library and developer tool in the blitz-js/blitz 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])
83b6be7: Upgrade cookie-session dependency to v2.1.1. Drop-in upgrade. Migration: None.

## Breaking Changes & Required Actions
- 83b6be7: Upgrade cookie-session dependency to v2.1.1
- 0ef8de0: fix: Overriden custom cookies with pages router

## Migration Snippet
```ts
npm install @blitz-js/blitz@3.0.2
```

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

## Zero-Noise Release Timeline
- **v3.0.2** (2025-09-11) [COMPATIBLE]: 83b6be7: Upgrade cookie-session dependency to v2.1.1. Drop-in upgrade. Migration: None.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is blitz-js/blitz v3.0.2 safe to upgrade in production?
blitz-js/blitz v3.0.2 is classified as COMPATIBLE (PATCH release). 83b6be7: Upgrade cookie-session dependency to v2.1.1. Drop-in upgrade. Migration: None.

### What breaking changes or compatibility risks exist in blitz-js/blitz v3.0.2?
No breaking API changes or peer dependency conflicts are recorded for blitz-js/blitz v3.0.2 in the RepoSense compatibility graph.

### What is the bundle size impact of @blitz-js/blitz v3.0.2?
Measured bundle size telemetry is currently unavailable for @blitz-js/blitz v3.0.2; verify build output locally before deploying.

### How do I upgrade @blitz-js/blitz to v3.0.2?
Upgrade @blitz-js/blitz to v3.0.2 by running "npm install @blitz-js/blitz@3.0.2" and applying the migration steps: npm install @blitz-js/blitz@3.0.2