[dependabot]

Bumps agents from 0.22.0 to 0.28.0.

Release notes

Sourced from agents's releases.

agents@0.28.0

This release adds two new tools, browser via agents/browser/{pi,ai-sdk,tanstack-ai} allowing an agent to create and manipulate a persistent browser session and web_fetch via agents/webfetch/{pi,ai-sdk,tanstack-ai} that can retrieve most document formats converted into markdown.

Minor Changes

• #2484 dedbee4 Thanks @​ben-reitz! - Add browserTool() to agents/browser/pi. See Persistent browser.

• #2473 6614955 Thanks @​mattzcarey! - Make agents/lifecycle stable along with the Scheduler (agents/schedules), State (agents/state), WebSockets (agents/websockets) and MCPClientManager (agents/mcp/client) capabilities. See Lifecycle.

Patch Changes

• #2540 b65956e Thanks @​mattzcarey! - ThinkHarness now keeps its sessions and operations in the shared agents/harness/store. Migrations are performed on first run. See ThinkHarness: Recovery.

• #2522 bcf5d20 Thanks @​ben-reitz! - Add agents/webfetch, a web_fetch tool that reads a URL as Markdown, JSON, or text (HTML, PDF, and Office documents via Worker AI). See Fetch the Web.

agents@0.27.0

This release adds four new experimental harnesses and a web_search tool, and reorganizes the experimental Channels API.

• 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 web_search 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 ChannelGateway, the Web Channel and its client, an AI SDK chat transport, and a new npx agents tui terminal client.
• Fixes: Streams, Tasks, useAgentChat reconnects, WebChannelClient, MCP credential cleanup on removeServer(), and x402 with MCP SDK v2.

Minor Changes

• #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 Channels.forHarness can serve an AI SDK model. The same entry point exports the AI SDK message conversions it is built on and createSendMessageTool, an AI SDK tool that sends a message to a surface through the gateway.

• #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 durable, resumable responses on Streams. Connect a harness with Channels.forHarness(harness, { channels }). The entry point also exports the turn protocol types and a draft harness interface (AgentHarness), which may change.

• #2429 df4cbd6 Thanks @​cjol! - Breaking: remove the first pass of agents/channels and move Channels to agents/experimental/channels.

  The agents/channels entry points are gone, along with ChannelHost, the fallback and fanout composites, and the AI SDK, TanStack AI and Voice helpers from the first pass. Slack, Telegram and Email move to agents/experimental/channels/slack, agents/experimental/channels/telegram and agents/experimental/channels/email, and keep verified ingress and normalization. Channels is being rebuilt around conversations and turns; the new API is experimental and may change between releases.

• #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 agents/experimental/channels/web, routes each to the agent object that holds its conversation, and delivers outbound messages. Every Channel that takes ingress needs a participant callback, where the application says who the sender is; Channels never picks an identity. The agent object is the authorization boundary: by default each participant gets one of their own, and a route callback can share one between participants or refuse them.

• #2436 062d091 Thanks @​cjol! - Add WebChannelChatTransport (agents/experimental/channels/web/ai-sdk), an AI SDK ChatTransport over the Web Channel, so AI SDK UIs can join a Channels conversation.

• #2433 6e6c58a Thanks @​cjol! - Add the Web Channel (agents/experimental/channels/web) and its client (agents/experimental/channels/web/client), which connect browsers and terminals to a conversation over the agent's WebSockets: live transcript and turns, approvals, client tool results, and creating, forking, resetting, listing and following conversations. WebSockets gains use for protocol handlers that run before the configured ones.

• #2502 66ae955 Thanks @​ben-reitz! - Add agents/websearch, a web_search tool over Cloudflare's Web Search API for the pi harness, the AI SDK, and TanStack AI. See Search the Web.

Patch Changes

• #2480 1923625 Thanks @​cjol! - AiSdkHarness: session.wait(operationId, signal) now rejects straight away when signal is already aborted, instead of staying pending until the operation settles.

• #2463 1e97e11 Thanks @​cjol! - AiSdkHarness no longer fails to start when it has stored sessions. onStart listed sessions while listing each one's pending work, and Durable Object storage allows one open kv.list() at a time, so a restarted agent stopped acknowledging messages.

• #2502 66ae955 Thanks @​ben-reitz! - AiSdkHarness passes its tools to convertToModelMessages, so a tool's toModelOutput also shapes its results on later turns instead of the model getting the raw output as JSON.

• #2488 98ec934 Thanks @​ben-reitz! - browserTool now has its own tool description instead of codemode's generic one. It covers the cdp API, common CDP mistakes, and the run time limit, so the model no longer runs codemode.search first. It also explains how to take a smaller screenshot when one is over the 1 MB result limit. See Persistent browser.

... (truncated)

Changelog

Sourced from agents's changelog.

0.28.0

Minor Changes

• #2484 dedbee4 Thanks @​ben-reitz! - Add browserTool() to agents/browser/pi. See Persistent browser.

• #2473 6614955 Thanks @​mattzcarey! - Make agents/lifecycle stable along with the Scheduler (agents/schedules), State (agents/state), WebSockets (agents/websockets) and MCPClientManager (agents/mcp/client) capabilities. See Lifecycle.

Patch Changes

• #2540 b65956e Thanks @​mattzcarey! - ThinkHarness now keeps its sessions and operations in the shared agents/harness/store. Migrations are performed on first run. See ThinkHarness: Recovery.

• #2522 bcf5d20 Thanks @​ben-reitz! - Add agents/webfetch, a web_fetch tool that reads a URL as Markdown, JSON, or text (HTML, PDF, and Office documents via Worker AI). See Fetch the Web.

0.27.0

This release adds four new experimental harnesses and a web_search tool, and reorganizes the experimental Channels API.

• 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 web_search 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 ChannelGateway, the Web Channel and its client, an AI SDK chat transport, and a new npx agents tui terminal client.
• Fixes: Streams, Tasks, useAgentChat reconnects, WebChannelClient, MCP credential cleanup on removeServer(), and x402 with MCP SDK v2.

Minor Changes

• #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 Channels.forHarness can serve an AI SDK model. The same entry point exports the AI SDK message conversions it is built on and createSendMessageTool, an AI SDK tool that sends a message to a surface through the gateway.

• #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 durable, resumable responses on Streams. Connect a harness with Channels.forHarness(harness, { channels }). The entry point also exports the turn protocol types and a draft harness interface (AgentHarness), which may change.

• #2429 df4cbd6 Thanks @​cjol! - Breaking: remove the first pass of agents/channels and move Channels to agents/experimental/channels.

  The agents/channels entry points are gone, along with ChannelHost, the fallback and fanout composites, and the AI SDK, TanStack AI and Voice helpers from the first pass. Slack, Telegram and Email move to agents/experimental/channels/slack, agents/experimental/channels/telegram and agents/experimental/channels/email, and keep verified ingress and normalization. Channels is being rebuilt around conversations and turns; the new API is experimental and may change between releases.

• #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 agents/experimental/channels/web, routes each to the agent object that holds its conversation, and delivers outbound messages. Every Channel that takes ingress needs a participant callback, where the application says who the sender is; Channels never picks an identity. The agent object is the authorization boundary: by default each participant gets one of their own, and a route callback can share one between participants or refuse them.

• #2436 062d091 Thanks @​cjol! - Add WebChannelChatTransport (agents/experimental/channels/web/ai-sdk), an AI SDK ChatTransport over the Web Channel, so AI SDK UIs can join a Channels conversation.

• #2433 6e6c58a Thanks @​cjol! - Add the Web Channel (agents/experimental/channels/web) and its client (agents/experimental/channels/web/client), which connect browsers and terminals to a conversation over the agent's WebSockets: live transcript and turns, approvals, client tool results, and creating, forking, resetting, listing and following conversations. WebSockets gains use for protocol handlers that run before the configured ones.

• #2502 66ae955 Thanks @​ben-reitz! - Add agents/websearch, a web_search tool over Cloudflare's Web Search API for the pi harness, the AI SDK, and TanStack AI. See Search the Web.

Patch Changes

• #2480 1923625 Thanks @​cjol! - AiSdkHarness: session.wait(operationId, signal) now rejects straight away when signal is already aborted, instead of staying pending until the operation settles.

• #2463 1e97e11 Thanks @​cjol! - AiSdkHarness no longer fails to start when it has stored sessions. onStart listed sessions while listing each one's pending work, and Durable Object storage allows one open kv.list() at a time, so a restarted agent stopped acknowledging messages.

• #2502 66ae955 Thanks @​ben-reitz! - AiSdkHarness passes its tools to convertToModelMessages, so a tool's toModelOutput also shapes its results on later turns instead of the model getting the raw output as JSON.

• #2488 98ec934 Thanks @​ben-reitz! - browserTool now has its own tool description instead of codemode's generic one. It covers the cdp API, common CDP mistakes, and the run time limit, so the model no longer runs codemode.search first. It also explains how to take a smaller screenshot when one is over the 1 MB result limit. See Persistent browser.

... (truncated)

Commits

• 48d9c36 Release agents@0.28.0 & @​cloudflare/think@​0.20.2 (#2537)
• b65956e refactor(agents): keep ThinkHarness records in the shared harness store (#2540)
• 6614955 chore(agents): mark Lifecycle, Scheduler, State, WebSockets and MCPClientMana...
• c1e71b3 feat(agents): add web_fetch tool (#2520)
• 0d5ccfd feat(agents): add web fetch source and content conversion (#2527)
• b898e62 feat(agents): add shared URL policy for web tools (#2526)
• 2a8687d refactor(agents): move websearch to src/web/search (#2525)
• dedbee4 feat(agents): add a pi-durable browserTool for a persistent browser (#2484)
• 63ea7d3 fix(agents): keep browserTool's active tab per scope (#2532)
• b263404 refactor(agents): move the browserTool adapters into src/browser/tools/ (#2531)
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[dependabot]

Superseded by #166.