~anthropic/claude-sonnet-latest → B (6:4)

Side B fixes a real reentrant-RwLock deadlock in the RPC handler (holding a read guard across match arms that later need read/write again), plus fixes test hangs by adding HTTP timeouts and switching log redirection to avoid pipe-buffer deadlocks, all with clear rationale in comments. Side A adds a nice-to-have connectivity display feature with unit tests, but it's cosmetic CLI output rather than a correctness fix, so it carries less lasting engineering value than B's concurrency/reliability fixes.