dsh-history-mirror-plugin

Working through a long conversation in the DeepSeek Harness web client often means dragging the entire main view away from the latest message and the input box just to glance at something you said ten turns ago, then scrolling back down before you can keep typing. dsh-history-mirror-plugin solves that friction with a small "History" button in the conversation title bar. Click it and the current chat is mirrored into the right-side detail panel with its own independent scroll position, so the main conversation stays pinned at the latest message while you flip freely upward on the right.

The history panel does not re-render the chat from scratch; it reuses the already-rendered DOM nodes and native styles of the main conversation, so code highlighting, tool-call collapsibles, images, and every other visual element look exactly as they do in the main view. New messages and streaming tokens are synced to the panel in real time, and scrolling on the right never nudges the main conversation. Clicking an http or https link inside the panel opens a sandboxed iframe under the "Web" tab with no same-origin access and no top-level navigation, keeping the preview contained. The plugin reads no API keys, cookies, or local storage, makes no network calls, and executes no system commands—all mirroring lives in the current browser page.

It is a good fit for DeepSeek Harness users who frequently revisit earlier context in long sessions, such as multi-step code generation, chained tool calls, or any workflow where you need to read history while continuing to type. Enabling the plugin replaces the native tool-detail panel with the history panel; simply disable or remove it to restore the original behavior.