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

DeepSeek Harness 自动审批门控：Flash 模型预判写入/命令是否不可回补，安全自动批准、危险转人工（fail-safe），最小人工介入，含人工审查 UI