DSH Side Chat

中文说明

A standalone DeepSeek Harness Web plugin that adds a Codex-style side chat beside the main conversation. It uses Harness public Session, Storage Domain, Workspace Registry, and Connection RPC surfaces without modifying the official Harness source.

Highlights

• Split the main conversation and side chat into two resizable panes instead of covering the main chat.
• Create a side chat from the current conversation, including selected-text quoting without automatic sending.
• Keep the child Session out of the official left sidebar while preserving its original log after relationship removal.
• Show parent title, short Session ID, summary, and a live “follows main-chat permissions” indicator.
• Choose a model and reasoning effort independently for each side chat; a new side chat initially inherits the main chat model.
• Use /sidechat to open the current or most recently updated side chat, or /sidechat content to fill its draft.
• Render user messages, Markdown, reasoning, tool activity, approvals, questions, slash-command lifecycle, and unknown events through a generic timeline.
• Navigate both conversations with compact Codex-style Turn rails: quiet equal ticks when idle, fisheye expansion and a preview card on hover.
• Generate a title from the first side-chat question, with manual rename taking permanent precedence.

Screenshots

The screenshots use synthetic conversation content and contain no real project data.

Feature	Preview
Resizable split view and parent context
Per-side-chat model and reasoning selector
Compact idle Turn rail
Hover preview and fisheye rail
Dark-theme parent context and permission following

Install into a Harness checkout

The plugin is currently distributed as a local link: package. Keep the plugin checkout next to the Harness checkout so its relative development links resolve:

workspace/
├─ deepseek-harness-proxy/
└─ dsh-sidechat/

Build the plugin and install it into the Web profile:

cd path\to\dsh-sidechat
$env:HTTP_PROXY='http://127.0.0.1:7890'
$env:HTTPS_PROXY='http://127.0.0.1:7890'
pnpm install
pnpm run build

cd ..\deepseek-harness-proxy
pnpm dsh plugin --profile web add link:..\dsh-sidechat
pnpm dsh web --host 127.0.0.1 --port 3080

The package has no prepare script. After changing src/, run pnpm run build and restart the Web profile so it loads the new lib/client.js.

Development

cd path\to\dsh-sidechat
$env:HTTP_PROXY='http://127.0.0.1:7890'
$env:HTTPS_PROXY='http://127.0.0.1:7890'
pnpm install
pnpm run typecheck
pnpm test
pnpm run build

The development dependencies use link: references to a sibling Harness checkout. Harness remains a peer/runtime dependency; this repository does not vendor or patch the official source.

Architecture

The Host half owns the dsh_sidechat storage domain, parent/child lineage validation, title and summary persistence, archive retry, permission synchronization, model inheritance, and the private loopback /dsh-sidechat RPC channel.

The Client half registers the native header action, split-screen overlay, selection action, slash-command source, model selector, generic timeline, and main/side Turn history rails. Draft text and pane width stay local to the browser; relationship records and titles are the only side-chat metadata persisted by the plugin.

Compatibility and privacy

• Designed for the DeepSeek Harness Web profile and its public plugin surfaces.
• Uses peer dependency ranges matching the current Harness checkout; test against the Harness revision you deploy.
• Side-chat RPC is restricted to the local Web connection boundary.
• Images and message drafts are sent through the child Session and are not written to the relationship table.
• Removing a side-chat relationship does not delete or unarchive the underlying Session log.

License

MIT. See LICENSE.