DSH Codex Rail

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为 DeepSeek Harness 对话左侧留白处加入 Codex 风格的回合时间轴，支持悬停预览、点击跳转与收藏。

A Codex-style turn rail for the DeepSeek Harness Web UI. It sits in the narrow gutter between the sidebar and the conversation and shows one short tick per turn.

Features

• Turn ticks — one short horizontal line per turn in the current session.
• Hover preview — the line grows and a card shows that turn's prompt and assistant response.
• Jump to turn — click a tick or the card's Jump here button; the transcript scrolls to that turn and pages history in when needed.
• Favorites — star a turn from the card. The top star opens a cross-session favorites panel; clicking a saved turn jumps to it, switching sessions when necessary.
• Theme aware — uses the host's --dsw-alias-* tokens and hides itself below 1080 px.

Favorites are stored in the browser's localStorage under dsh-codex-rail.favorites.v1. No host data is uploaded.

Install

Install the bundle from the DSH plugin market, or link this directory into a DSH profile and enable @local/dsh-codex-rail:

# from the directory that contains this package
dsh plugin add ./dsh-codex-rail

The package declares dsh.bundle.patch and a Web client half. It is a UI-only bundle: the Host half is intentionally empty.

How it works

• Registers a React component in the conversation.session.header.utilities slot and portals the rail into the conversation root's left edge.
• Reads the whole-session outline from the turnOutline projection and the loaded turns from useChat(snapshot => snapshot.navigation.items()).
• Jumps to unloaded turns with sessions.binding(sessionId).session.loadThrough(seq), then scrolls the matching [data-chat-anchor-key] row into view.
• Uses only --dsw-alias-* theme tokens and does not import DSH client packages.

Development

node --check client.js
node --check index.js

The client is a single window.__ModuleLoader__.load(...) factory; client.js is the whole UI. Locale metadata lives in locale/.