- Introduced `generateHandoffFromContext` to enable provider-aware oneshot generation and improved cache hit rates via the live-turn pipeline.
- Updated `buildSideRequestContext` to support pinning custom system prompts, preventing per-turn hook leakage during handoff.
- Added concurrency guards across CLI and RPC modes to block manual `/handoff` requests while a session is actively streaming.
- Standardized handoff execution to force `toolChoice: "none"` and enforce consistent cache-routing behavior.
- Reworked createAbortableStream to forward abort signals to the source stream reader.
- Added cleanup logic so abort/cancel/error paths release locks and emit AbortError consistently.
- Updated related tests to verify source-stream cancellation and handoff escape-handler behavior.
- Updated the catalog changelog by removing a duplicate `Fixed` heading and leaving the NVIDIA Qwen fix in the current release notes.
- Restructured the coding-agent changelog by moving unresolved fixes into Unreleased and removing duplicated historical entries.
- Added `requestComponentRender` to mocked `ui` objects in coding-agent controller tests to match the updated interface.
can1357