Cloudflare Agents SDK 0.27.0 released
New experimental harnesses: AiSdkHarness, ThinkHarness, ContainerHarness (which runs Claude Code or Codex in a Container) and OpenCodeHarness, all with the same shape as PiHarness.; New agents/websearch: a websearch tool over Cloudflare's Web Search API for…
What changed
- New experimental harnesses: AiSdkHarness, ThinkHarness, ContainerHarness (which runs Claude Code or Codex in a Container) and OpenCodeHarness, all with the same shape as PiHarness.
- New agents/websearch: a websearch tool over Cloudflare's Web Search API for pi, the AI SDK and TanStack AI.
- Channels moved to agents/experimental/channels: Channels is being rebuilt around conversations and turns, and the old agents/channels entry point has been removed. The new API includes…
- Fixes: Streams, Tasks, useAgentChat reconnects, WebChannelClient, MCP credential cleanup on removeServer(), and x402 with MCP SDK v2.
- #2434 0ebeae5 Thanks @cjol! - Add AiSdkHarness from the new agents/harness/ai-sdk entry point, which runs each message with streamText and keeps sessions and transcripts in the Durable Object, so…
- #2431 6393265 Thanks @cjol! - Add Channels to agents/experimental/channels: a Lifecycle capability that serves an agent harness's sessions as conversations to every surface that joins them, with…
- #2429 df4cbd6 Thanks @cjol! - Breaking: remove the first pass of agents/channels and move Channels to agents/experimental/channels.
- #2432 752cdc3 Thanks @cjol! - Add ChannelGateway to agents/experimental/channels: the Worker entry point that verifies channel webhooks, takes Web Channel upgrades through web() from…
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