Anthropic retires the Workbench and 3 prompt-gen API endpoints
The stateless Playground replaces it — saved prompts, variables and evals didn't migrate, and unexported data is gone. New Vercel and Cline drops too.
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The Workbench is gone; Playground stands in its place
Anthropic retired the legacy Workbench and shipped a new Playground in the Claude Console. It supports every Messages API parameter and shows the full SDK request and API response for each run, so you can prototype a call and copy production-ready code.
Three prompt endpoints now return errors
The experimental generate_prompt, improve_prompt and templatize_prompt routes (under /v1/experimental/) were removed on roughly 31 days' notice — about half Anthropic's usual 60. The workaround: reproduce them with a normal Messages call driven by a meta-prompt.
Saved prompts, variables and evals didn't survive
The new Playground is stateless: saved prompts with version history, named variable slots, eval configs and run history weren't carried over. Reportedly the export window has now closed with no documented recovery path — if you left prompts in the Workbench, assume they're gone.
Where teams are moving prompts instead
For versioned prompts and evals, builders are reportedly shifting to third-party tools — PromptLayer, the open-source self-hostable Langfuse, Braintrust, or LangSmith — since the Playground drops those features by design.
Elsewhere: Cline joins the AI SDK harness
Vercel shipped the @ai-sdk/harness-cline adapter, so you can now drive Cline through the AI SDK's HarnessAgent interface — one more coding agent you can wire directly into an AI SDK app.
Elsewhere: ship Instagram-DM bots on Vercel
The Chat SDK added Instagram Direct Messages support — media, quick replies, reactions and story replies — so you can build an IG DM assistant on the same stack.