dsh-msgrail

Long conversations in DeepSeek Harness can easily run into hundreds of messages, and jumping back to an early question or follow-up usually means endless scrolling. dsh-msgrail adds a vertical rail of brand-colored dots along the right edge of the conversation pane—one dot per real user message, ordered top to bottom by time, with the latest dot kept brighter for instant recognition. Hovering a dot reveals a small preview card with the timestamp and a three-line text snippet; clicking it jumps straight to that message. If the target lives in history that has not yet been rendered, the plugin automatically pages through the older messages one batch at a time until the target is in view, so you never have to scroll manually.

The entire feature is built as a pure overlay plugin via shell.overlay. No host layout code is patched, which means upgrading DSH requires no rework. All colors are drawn from DSH semantic tokens and CSS color-mix, so the rail blends seamlessly into whichever skin or theme is active—Pinkie, dragon, or custom. On the data side, the plugin reads from the in-memory session first for speed, falls back to persisted event logs, and caches cold-session results for 30 seconds, giving you the full history regardless of what the front-end window has loaded.

It is ideal for developers who hold long, multi-turn conversations and need to revisit earlier messages frequently, as well as for teams that package dsh-desktop and distribute it so colleagues get the rail out of the box with zero extra setup. If you want lightweight message navigation without patching the host and without fighting the theme system, dsh-msgrail is a drop-in, upgrade-safe, skin-aware choice.