Model router for DeepSeek Harness: keep a pool of models and every step is routed to one of them with its reasoning effort set — a click-only composer panel, three authorization scopes (a manual pick only counts in the scope that owns it, and effort scope

DSH plugin: per-model proxy routing (http/https/socks5) with a settings UI — e.g. opencode/muse-spark-1.2-contributor needs a proxy while sibling models stay direct