Chat SDK adds message subjects and direct SDK access

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Vercel News2026年5月20日

Chat SDK adds message subjects and direct SDK access

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TL;DR · AI Summary

Vercel Chat SDK adds message subject functionality and direct SDK access, allowing developers to read parent issues or pull requests when bots are mentioned in Linear or GitHub comments, improving integration experience.

Key Takeaways

Chat SDK now supports message.subject property to read parent issues or PRs
New direct SDK access feature improves developer experience
Applies to robot integration scenarios in Linear and GitHub comments

Outline

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§Chat SDK Feature Update
Vercel Chat SDK adds message subject functionality and direct SDK access.
·Message Subject Functionality
Developers can now read parent issues or pull requests through message.subject when bots are mentioned.
·Platform Integration Support
This feature supports robot integration in Linear and GitHub comment scenarios.

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Vercel Chat SDK更新
- 消息主题功能
  - message.subject属性
- 平台集成
  - Linear支持
  - GitHub支持

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You can now read the parent issue or pull request when your bot is mentioned in a Linear or GitHub comment.
⬇︎ 下载 PNG 𝕏 分享到 X
`message.subject`
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#Vercel#Chat SDK#AI#GitHub#Linear

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Chat SDK adds message subjects and direct SDK access - Vercel

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Chat SDK adds message subjects and direct SDK access

![Image 2 Ben Sabic Content Engineer](https://twitter.com/bensabic)![Image 3 Josh Singh Software Engineer](https://twitter.com/nishimiya)

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May 20, 2026

You can now read the parent issue or pull request when your bot is mentioned in a Linear or GitHub comment. message.subject resolves to that parent with title, status, URL, and the full typed payload.

lib/bot.ts

code

bot.onNewMention(async (thread, message) => {  const subject = await message.subject;
  if (subject) {    await thread.post(      `This is about: ${subject.title} (${subject.status})\n${subject.url}`    );  }});

Reply to a mention with the parent issue's title, status, and URL

message.subject is cached per message, so repeated access only hits the API once. It resolves to null on Slack and other chat platforms, where there's no parent resource.

[Link to heading](https://vercel.com/changelog/chat-sdk-adds-message-subjects-and-direct-sdk-access#direct-access-to-platform-sdks)Direct access to platform SDKs

The GitHub, Linear, and Slack adapters now expose their underlying platform SDKs. Use them to extend your bot by calling provider APIs directly.

code

// Add a "triaged" label to issue #42const { octokit } = bot.getAdapter("github");await octokit.rest.issues.addLabels({ owner: "vercel", repo: "chat", issue_number: 42, labels: ["triaged"] });
// Create a new issue in a teamconst { linearClient } = bot.getAdapter("linear");await linearClient.createIssue({ teamId: "TEAM_ID", title: "Investigate flaky test" });
// Pin a message in a channelconst { webClient } = bot.getAdapter("slack");await webClient.pins.add({ channel: "C123ABC", timestamp: "1234567890.123456" });

Add a GitHub label, create a Linear issue, or pin a Slack message

The previous .client getter remains as a @deprecated alias on the adapters.

Read the documentation to get started, or explore one of our templates.

**The Complete Guide to Chat SDK** Learn how Chat SDK works end-to-end: from core concepts to building your first bot to deploying it across Slack, Teams, and more. Read the guide

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