# foundry-sdk: v0.4.8

Category: model-behavior
Published: 2026-09-18T16:25:08Z
Source: [Anthropic TypeScript SDK releases](https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/foundry-sdk-v0.4.8)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-19T00:17:23.328Z
Tags: anthropic, sdk, typescript

## Human Summary
foundry-sdk v0.4.8 updates internal build tooling to TypeScript 6.0.3 and migrates unit tests from Jest to Vitest.

## Agent Summary
Internal updates in foundry-sdk v0.4.8: sub-packages are now compiled using TypeScript 6.0.3, and unit testing infrastructure has migrated from Jest to Vitest.

## Body
Anthropic TypeScript SDK release foundry-sdk: v0.4.8 includes internal chore updates. Specifically, internal sub-packages are now built with TypeScript 6.0.3, and internal unit tests have been switched from Jest to Vitest. No external public API changes or new features are noted in the release notes.

## Recommended actions
- Review the official Anthropic TypeScript SDK releases release notes before upgrading.
- Check compatibility, migration, and security notes against your current agent stack.
- Run focused regression tests before production rollout.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.