v0.8.16

Added

• fascicle/ui subpath for streaming a run into an AI SDK useChat UI: to_ui_message_response, pipe_ui_message_stream_to_response, and to_ui_message_chunks translate trajectory model_chunk events onto the AI SDK UI message wire. Ships with docs/human-in-the-loop.md and examples/hitl_http.ts covering suspend/confirm/resume over HTTP.

Changed

• model_call now records model_chunk on the trajectory (via trajectory.record) instead of routing it through ctx.emit, so consumers see a clean top-level model_chunk event carrying the StreamChunk rather than one wrapped in a generic emit.

Fixed

• Disabled the AI SDK's built-in retry (maxRetries: 0) on the generate and stream calls. The engine already owns retry via its retry policy; the SDK's default of 2 nested a second retry loop inside every attempt, inflating provider round-trips and distorting backoff.