BaronCyrus/dsh-harness-ally: Enable DSH to share the same session lifecycle with external CLI

dsh-harness-ally is a DSH Agent Preset developed by BaronCyrus, designed to address session isolation and statistical chaos issues during multi-tool collaboration. This plugin enables DeepSeek Harness, Claude Code, Codex, and Kimi Code to share a single DSH session lifecycle without the need for additional CLI session maintenance or mixed tool flows. Core capabilities include the separation of model selection and Harness execution entry points, allowing users to switch external CLI execution per turn while retaining DSH's native model selector. The external execution process is transparent and visible, displaying reasoning and tool activities in real-time without ever masquerading as DSH's native tool calls to avoid duplicate execution. It supports CLI auto-detection and managed installation, providing one-click installation when missing; and unified token statistics, unifying external Ha...