# AI SDK harness layer now supports native subscription authentication

Publisher-attributed story with a reviewed brief or permitted publisher paragraph. The original publisher is responsible for the linked reporting.

- Publisher: Vercel
- Author credit: Felix Arntz
- Category: AI
- Original publication time: 2026-09-14T21:28:00Z
- Original update time: 2026-09-14T21:28:00Z
- First observed by NexusTechWire: 2026-10-01T20:28:47Z
- Original source: https://vercel.com/changelog/ai-sdk-harness-native-subscription-authentication
- NexusTechWire record: https://nexustechwire.com/news/news-eb063b6ffd1f4177cd01

## The brief

Vercel's AI SDK harness can now use native coding-agent subscriptions when the underlying agent supports them. Explicit provider credentials take priority in direct mode; automatic mode can use a subscription only without Gateway credentials. Gateway mode never reads subscriptions. Vercel says tokens remain managed on the host, with placeholder injection available only where the sandbox supports it.

AI-assisted NexusTechWire summary, checked against the linked source on 2026-10-02T00:20:08.161Z. Not independent reporting.

Read the full original: [Vercel](https://vercel.com/changelog/ai-sdk-harness-native-subscription-authentication)

This record does not reproduce the complete article or represent independent confirmation of every source claim.