Chat SDK adds X adapter support

Short summary

Vercel's Chat SDK now supports X (Twitter) via a new adapter, extending its single-codebase bot framework to seven platforms including Slack, Discord, GitHub, Teams, Telegram, and WhatsApp. The adapter handles CRC verification, webhook signatures, and OAuth token refresh automatically. Likes are the only supported reaction, and responses post once on completion since X lacks native streaming.

• •Chat SDK adds X (Twitter) adapter for single-codebase bot development
• •Adapter handles CRC verification, webhook signatures, and OAuth refresh automatically
• •Supports public mentions and DM conversations via X API v2

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