dsh-session-plus is a session enhancement plugin for DeepSeek Harness (DSH) that adds two lightweight boosts to the chat session page:

• 🏷 Show the active model provider at the top of the model selection menu, in real time
• ✂️ Turn any selected text into a Markdown code block, prepended to the input, with one click

📑 Table of Contents

• ✨ Features
• 🚀 Quick Start
• 📖 Usage
• 🧪 Tests
• 🗂 Project Structure
• 🛠 Tech Stack
• 🧭 Roadmap
• 📄 License

✨ Features

1️⃣ Model Provider Header

2️⃣ Selected Text → Add to Conversation

flowchart LR
    A["Drag-select text (chat page / right sidebar)"] --> B{"Selection in an allowed area?"}
    B -- No --> X["No button shown"]
    B -- Yes --> C["Pill appears centered above the selection"]
    C --> D{"Button clicked?"}
    C --> F["Outside click / Esc / scroll"]
    F --> C
    D -- Yes --> E["Text wrapped in a code block, prepended to the input"]
    E --> G["Trailing blank line · clear selection · focus input"]
    D -- No --> H["Keep floating, wait for action"]
    H --> C

🚀 Quick Start

1. Install

cd <absolute-path-to-plugin> && pnpm install
dsh plugin --profile web add dsh-session-plus@link:<absolute-path-to-plugin>

2. Restart and verify

This is a bundle-layer plugin; restart dsh web to activate:

# Stop with Ctrl+C in the terminal, then start again
npm exec @deepseek-ai/dsh web

After restart, open any session:

• Click the composer's model select — the menu shows the current provider at the top
• Drag-select text in the message area — the "Add to conversation" button appears

Upgrade & Rollback

dsh plugin --profile web remove dsh-session-plus
# Restart dsh web to finish uninstall

📖 Usage

Model Provider Header

• Position: first row of the model selection menu (appears as soon as the menu opens).
• Content: Provider: <display name>; raw provider id when the directory lacks the group; — before a selection is loaded.
• Live: switching models/providers while open refreshes the header immediately; closing the menu removes it, reopening re-injects it.
• No side effects: model list scrolling, effort levels, and keyboard navigation are untouched; the /model popup is not injected.

Selected Text → Add to Conversation

• Trigger: drag-select text in the chat message area (assistant reply or user message) or in the better-sidebar right panel; the "Add to conversation" button appears above the selection on release.
• Result: clicking puts a ```-fenced code block at the start of the input; existing draft content stays after it (blank line separated); the result ends with a trailing blank line.
• Dismiss: outside click, Escape, collapsed selection, or scrolling the message area hides it; it returns automatically once scrolling stops and the selection is visible again; after clicking, the selection clears and the input regains focus.
• Edges: selections inside the input / sidebar / settings never trigger.

Supported Scope

🧪 Tests

npm test

20 unit tests, all passing:

• Provider label: display-name priority / raw-id fallback / empty-state placeholder / tolerance for empty groups and names
• Code-block insertion: fence always ``` / prepend composition / empty draft / trailing-blank-line idempotency / ``` inside text still uses ```
• Host-half mounting: export surface is exactly name + apply (a no-op without inject) — guards the "the host row must stay" constraint
• Browser-half registration surface: only two conversation.input.overlay registrations, three remaining locale keys, both dictionary and style effects intact, and the session-header / shell.overlay registrations verifiably gone

🗂 Project Structure

dsh-session-plus/
├── lib/
│   ├── client.js   # Browser half: provider header + selected-text add (single bundle, 2 overlay registrations)
│   ├── index.js    # Host half: deliberately empty apply (lets dsh-client-modules discover the browser half)
│   ├── insert.js   # Selected text → code-block composition (unit-testable)
│   └── label.js    # Provider-label pure function (unit-testable)
├── test/           # client / index / label / insert test suites
├── cordis.patch.yml
├── CHANGELOG.md
├── package.json
└── LICENSE

🛠 Tech Stack

🧭 Roadmap

• Model provider header (live updates + bilingual copy)
• Selected text → add to conversation (floating button + code-block insertion)
• Scoped triggers (chat page + better-sidebar right panel only)
• Trailing blank line after insertion
• Remove "Open Workspace" (superseded by DSH's built-in Open In…, see CHANGELOG.md)
• Escaping / tolerance for fences inside the selected text
• Insert position options (start / end / cursor)

📄 License

This project is released under the MIT license (SPDX: MIT).