GitHub Copilot joins AI SDK HarnessAgent: swap runtimes without rewriting your agent UI

UpdatedSeptember 16, 2026

On September 10, 2026, Vercel added GitHub Copilot to the AI SDK harness layer through @ai-sdk/harness-github-copilot. If your product already runs coding agents behind HarnessAgent, that adapter is the missing swap: same session API, same stream shapes, Copilot as one more runtime you can select without rewriting the chat UI.

This post is for builders who ship agent products (or internal agent routes) and need Copilot in the same control plane as Claude Code, Codex, Cursor, and the other listed harnesses — not for people hunting a generic Copilot desktop tip.

This is an excerpt. Read the full post at otf-kit.dev/blog/github-copilot-ai-sdk-harness — full-stack kits your AI coding agent can actually ship to production. Browse the kits →

#ai-tools #agents #vercel

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