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ToolsThe story, in brief

Chat SDK adds message subjects and direct SDK access

Vercel's Chat SDK now lets bot builders call GitHub, Linear, and Slack APIs directly—no more adapter limits.

Reporting by Vercel Blog 1 min brief
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The KeyNews take

Why it matters

Developer infrastructure for AI agents just got more flexible. Direct SDK access means bot builders can now extend functionality beyond chat, reducing friction in agent-as-a-product development.

The key facts

9 to know

  1. Message subjects now resolve parent issues/PRs from Linear and GitHub with title, status, URL

  2. Platform SDKs (GitHub, Linear, Slack) now directly exposed on adapters

  3. message.subject is API-cached to prevent repeated calls

  4. Previous .client getter deprecated in favor of direct SDK access

  5. Published May 20, 2026

  6. Chat SDK adds message.subject property to resolve parent issues/PRs in Linear and GitHub

  7. message.subject caches per message to reduce API calls

  8. GitHub, Linear, and Slack adapters now expose underlying platform SDKs for direct API access

  9. .client deprecated in favor of native SDK access

Go to the source

Vercel Blogvercel.com

Publisher excerpt: You can now read the parent issue or pull request when your bot is mentioned in a Linear or GitHub comment. resolves to that parent with title, status, URL, and the full typed payload.message.subject is cached per message, so repeated access only hits the API once. It resolves to on Slack and other…
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