@cloudflare/ai-chat@0.7.0
cloudflare/agents@cloudflare/ai-chat@0.7.0May 13, 2026by github-actions[bot]
AI Summary
This release adds a new `cancelOnClientAbort` option to `useAgentChat` that changes the default behavior so client aborts don't cancel server turns (allowing them to continue and resume), along with several bug fixes for WebSocket handling, reasoning chunk sequencing in auto-continuation streams, and streaming state cleanup.
Key Highlights
- Added `cancelOnClientAbort` option to `useAgentChat` - server turns now continue by default on client aborts instead of being cancelled
- Fixed WebSocket race condition handling - no longer throws when stream resume/replay races with closed connections
- Fixed WebSocket stream cleanup when disconnect happens before terminal response
- Fixed reasoning chunk sequencing in approval auto-continuation streams to maintain valid `reasoning-start` before `reasoning-delta`
- Fixed `useAgentChat().isServerStreaming` cleanup for resumed streams entering fallback observer path
Breaking Changes
- Default behavior change: generic client aborts no longer cancel server turns by default (server turns continue and resume). Set `cancelOnClientAbort: true` to restore previous behavior.
New Features
- New `cancelOnClientAbort` option in `useAgentChat` to control whether client aborts cancel server turns
- Think agent-tool children can now complete without emitting assistant text
- Non-chat tool-step agents can provide structured output through `getAgentToolOutput` with summaries derived from various sources (assistant text, string output, structured output, or empty string)
Full Release Notes
### Minor Changes
- [#1484](https://github.com/cloudflare/agents/pull/1484) [`364a45d`](https://github.com/cloudflare/agents/commit/364a45da3efb7418ecf1dd0da1c21cb3d4059b27) Thanks [@whoiskatrin](https://github.com/whoiskatrin)! - Add `cancelOnClientAbort` to `useAgentChat`. Generic browser/client stream cleanup is now local-only by default so server turns can continue and resume; explicit `stop()` still cancels the server turn. Set `cancelOnClientAbort: true` to make generic client aborts cancel the server turn.
### Patch Changes
- [#1376](https://github.com/cloudflare/agents/pull/1376) [`6561a3f`](https://github.com/cloudflare/agents/commit/6561a3fb6ba7e1833c902457a015d47045a4e4a7) Thanks [@hrushikeshdeshpande](https://github.com/hrushikeshdeshpande)! - Avoid throwing when chat stream resume negotiation/replay races with a closed WebSocket connection.
- [#1487](https://github.com/cloudflare/agents/pull/1487) [`752e25a`](https://github.com/cloudflare/agents/commit/752e25ab0a6d7dba3ac4829443e2dd4dca9481c0) Thanks [@whoiskatrin](https://github.com/whoiskatrin)! - Close the original WebSocket chat transport stream when the socket disconnects before a terminal response, preventing recovered chat continuations from leaving `useAgentChat` stuck in streaming state.
- [#1481](https://github.com/cloudflare/agents/pull/1481) [`12365dd`](https://github.com/cloudflare/agents/commit/12365dd622283ad06bae3dacf80db6ca9886ef72) Thanks [@whoiskatrin](https://github.com/whoiskatrin)! - Fixed approval auto-continuation streams so reasoning chunks keep a valid `reasoning-start` before `reasoning-delta` sequence when continuing from an assistant message that already has reasoning, and preserve the continuation reasoning in the final persisted message.
- [#1483](https://github.com/cloudflare/agents/pull/1483) [`5373f5c`](https://github.com/cloudflare/agents/commit/5373f5ca246e756c8c36df915380fbc5319c5162) Thanks [@whoiskatrin](https://github.com/whoiskatrin)! - Allow Think agent-tool children to complete without emitting assistant text. Non-chat tool-step agents can now provide structured output through `getAgentToolOutput`, with summaries derived from assistant text, string output, structured output, or an empty string.
Fix `useAgentChat().isServerStreaming` cleanup when a resumed stream first enters the fallback observer path and later becomes transport-owned.