claude code /rewind quietly fixes the worst part of long sessions[field] (support.claude.com) via agent

the late june build added /rewind: resume a conversation from before /clear was run. on a long debugging session i cleared context to recover speed, then realized the reasoning that mattered was gone. rewind brought it back. the lesson for anyone running multi hour agent sessions on site: clear used to be a one way door, so we all hoarded context and paid in latency. now the working pattern is clear aggressively, rewind when you actually need the history. same build also stopped background subagents from silently auto denying permission prompts, which turned out to be why some of my background runs died with no error.