The Wire · Showcase
CHAT 4.27.0 SHIPS WITH ADAPTER OVERHAUL AND SLACK LINK PREVIEWS
By RepoJournal · Filed · About Vercel
Vercel's chat platform released a major version bump across eight adapters with new API endpoints, custom configuration options, and fixed Slack unfurl metadata handling — the biggest chat update in weeks.
The @chat-adapter ecosystem hit 4.27.0 [1] with a coordinated release across Discord, Slack, and six other adapters, adding `apiUrl` config support for custom endpoints (a feature teams have been requesting for GovSlack and GitHub Enterprise deployments) [3]. The Slack adapter now enriches link previews with full OG metadata from attachments [4], fixing a gap where unfurl data was silently dropped. Documentation landed simultaneously [2], covering streaming APIs, error codes, and the new ExternalSelect component — this matters because every adapter README now has the config guidance teams need. On the infrastructure side, the Terraform provider merged four critical fixes: firewall rules now update instead of recreate [7], Edge Config token handling is future-proofed before API field deprecation [6], and project import state conversion is bulletproof [8]. Next.js added non-standard robot directives support [9], letting you emit SeznamBot and Yandex-specific crawl rules. The AI SDK did cleanup work [10] [11], removed a broken experimental provider hook, and hardened Amazon Bedrock's cross-provider reasoning handling [12]. Nft's concurrency semaphore was leaking badly [5] — file IO was releasing the queue slot before operations finished, defeating the 1024-concurrent-read limit entirely.
Action items
- → Upgrade @chat-adapter packages to 4.27.0 if you use custom API endpoints or need Slack link previews vercel/chat [plan]
- → Merge Terraform provider fixes (#483, #466, #489) into your state before next infrastructure deploy vercel/terraform-provider-vercel [plan]
- → Update vercel/nft to fix runaway file concurrency if you're hitting IO saturation vercel/nft [monitor]
References
- [1] @chat-adapter/shared 4.27.0
- [2] Chat 4.27.0 documentation update
- [3] @chat-adapter/discord 4.27.0 apiUrl config
- [4] Slack link preview unfurl enrichment
- [5] NFT concurrency semaphore fix
- [6] Edge Config token deprecation handling
- [7] Terraform firewall rules update fix
- [8] Terraform project read state conversion
- [9] Next.js robots.ts non-standard directives
- [10] AI SDK experimental_customProvider removal
- [11] AI SDK ExtractLiteralUnion export removal
- [12] Bedrock cross-provider reasoning fix
FAQ
- What changed in Vercel on May 1, 2026?
- Vercel's chat platform released a major version bump across eight adapters with new API endpoints, custom configuration options, and fixed Slack unfurl metadata handling — the biggest chat update in weeks.
- What should Vercel teams do about it?
- Upgrade @chat-adapter packages to 4.27.0 if you use custom API endpoints or need Slack link previews • Merge Terraform provider fixes (#483, #466, #489) into your state before next infrastructure deploy • Update vercel/nft to fix runaway file concurrency if you're hitting IO saturation