# AssemblyScript/assemblyscript · RepoSense Release & Migration Intelligence

> optimize dayOfWeek & dateFromEpoch routines in date (#. Drop-in upgrade. Migration: None.

## Metadata
- **Repository URL**: https://github.com/AssemblyScript/assemblyscript
- **Primary Package**: `@assemblyscript/assemblyscript` (NPM)
- **Categories**: `LANGUAGE`, `BUILD_TOOL`
- **Latest Version**: `v0.28.20`
- **Semantic Status**: `COMPATIBLE`
- **Bundle Size Impact (unavailable)**: `Size Unavailable`
- **Atom Ingestion Feed**: https://github.com/AssemblyScript/assemblyscript/releases.atom

## The Human Context (Plain-English Pitch)
@assemblyscript/assemblyscript is an open-source library and developer tool in the AssemblyScript/assemblyscript 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])
optimize dayOfWeek & dateFromEpoch routines in date (#. Drop-in upgrade. Migration: None.

## Breaking Changes & Required Actions
- **optimize dayOfWeek & dateFromEpoch routines in date (#3033)** (9ca63f2)
- **chore: Update Binaryen and other dependencies (#3035)** (b6bda05)
- **chore: Update binaryen, esbuild & other dependencies (#3032)** (2829037)

## Migration Snippet
```ts
npm install @assemblyscript/assemblyscript@0.28.20
```

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

## Zero-Noise Release Timeline
- **v0.28.20** (2026-07-22) [COMPATIBLE]: optimize dayOfWeek & dateFromEpoch routines in date (#. Drop-in upgrade. Migration: None.

## Upgrade & Migration Q&A (GEO Direct Answers)
### Is AssemblyScript/assemblyscript v0.28.20 safe to upgrade in production?
AssemblyScript/assemblyscript v0.28.20 is classified as COMPATIBLE (PATCH release). optimize dayOfWeek & dateFromEpoch routines in date (#. Drop-in upgrade. Migration: None.

### What breaking changes or compatibility risks exist in AssemblyScript/assemblyscript v0.28.20?
No breaking API changes or peer dependency conflicts are recorded for AssemblyScript/assemblyscript v0.28.20 in the RepoSense compatibility graph.

### What is the bundle size impact of @assemblyscript/assemblyscript v0.28.20?
Measured bundle size telemetry is currently unavailable for @assemblyscript/assemblyscript v0.28.20; verify build output locally before deploying.

### How do I upgrade @assemblyscript/assemblyscript to v0.28.20?
Upgrade @assemblyscript/assemblyscript to v0.28.20 by running "npm install @assemblyscript/assemblyscript@0.28.20" and applying the migration steps: npm install @assemblyscript/assemblyscript@0.28.20