Linux-native DSH, extended to WSL. Multi-step work shares one long-lived shell; one-off commands start fresh, in parallel, with timeouts. Files can be read, written, edited and searched inside the distribution. A terminal you opened is visible and read-on

DeepSeek Harness fast mode: fewer round trips at the same thinking effort. Adaptive parallel tool fan-out, output discipline that never trims the answer, a cancellable stall guard, and one off-by-default switch (lazy) that steps a stalled turn one rung do