Backport: feat(mcp): expose server instructions to be accessible through client#15166
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…#14764) ## Background #14669 The `@ai-sdk/mcp` client received instructions from the MCP server in the initialize handshake response but silently dropped them. ## Summary added `instructions?: string` to the MCPClient interface + added a get instructions() getter returning that field. then stored `result.instructions` alongside serverInfo/capabilities in init(). ## Manual Verification verified by running `examples/mcp/src/server-instructions/server.ts` and `examples/mcp/src/server-instructions/client.ts` ## Checklist - [x] All commits are signed (PRs with unsigned commits cannot be merged) - [x] Tests have been added / updated (for bug fixes / features) - [x] Documentation has been added / updated (for bug fixes / features) - [x] A _patch_ changeset for relevant packages has been added (for bug fixes / features - run `pnpm changeset` in the project root) - [x] I have reviewed this pull request (self-review) ## Related Issues fixes #14669
…4764-to-release-v6.0
aayush-kapoor
approved these changes
May 11, 2026
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This is an automated backport of #14764 to the release-v6.0 branch. FYI @aayush-kapoor