thinking-slider

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Thinking-strength slider — a client plugin for the DSH web UI that replaces the discrete button list for "thinking strength" (reasoning effort) in the model picker with a snap-to-step slider.

Introduction

When using the DSH web UI, adjusting how "deeply" a model thinks — its thinking strength (reasoning effort) — hides behind a second-level menu in the model picker as a row of discrete buttons: Default / Off / High / Max. Clicking is straightforward, but for a concept that is inherently a continuous gradient, a button list is neither intuitive nor pleasant to operate.

thinking-slider exists exactly for this: it replaces that row of buttons with a snap-to-step slider, making thinking-strength adjustment as smooth and natural as a volume control.

• More intuitive — drag continuously; release to snap to the nearest step center with a springy settle animation. Every level "lands firmly and reads clearly".
• More restrained — only the "thinking strength" panel is replaced; model switching, the Default level, error retry, and the session lock state all behave exactly as the original.
• Non-invasive — it shadows the original seat (priority -1); stop or remove the plugin and the original button-list UI returns instantly, with nothing left behind.
• User-aware — the explanation text follows the DSH UI language (zh/en); after commit the host remains the single source of truth, so the UI always reflects the real selection.

It is not a standalone app — it is a lightweight DSH client plugin of 3 files and a few hundred lines: the host half merely marks the Loader row, while the browser half carries the entire UI and interaction, wired into DSH's plugin system through the dsh.client declaration and auto-loaded at process start.

Features

• Slider-based thinking strength — open the model picker → "Thinking strength" and pick between Default / Off / High / Max (whatever levels the model actually provides)
• Snap-to-step — drag continuously; on release the thumb snaps to the nearest step center with a springy settle animation
• Visual feedback — capsule track, blue progress fill, middle-level dots (first/last hidden under the thumb), white round thumb
• Explanatory copy — under the title: "Higher strength produces more detailed reasoning but costs more time and resources"
• Bilingual — copy follows the DSH UI language
• Commits immediately — the snapped level is submitted via session.selectModel; the host is the single source of truth
• Keeps original behavior — model list switching, Default level, error retry, and session lock state match the original

How it works

The plugin shadows the conversation.input.model seat via shadow registration (priority -1 < original 0; the lowest renders):

• The original (@deepseek-ai/dsh-client-ui-model-selection) registers at priority 0 and renders the two-level "Model / Reasoning effort" menu
• This plugin registers at priority -1 and renders the two-level "Model / Thinking strength" menu, whose strength panel is a slider
• Stop or remove the plugin and the original button-list UI returns immediately

The data flow reuses the original per-session ModelDirectory (the modelDirectories service): load the model catalog → subscribe to directory.store → commit via directory.select({provider, model, reasoningEffort}).

Install

Requires the DSH web environment (@deepseek-ai/dsh-web-app and dsh-client-ui-model-selection mounted).

1. Clone this repository and put the thinking-slider directory into the DSH profile's node_modules (hoisted layout):

   # assuming DSH_HOME=C:\Users\<you>\.dsh
   cd %DSH_HOME%\profiles\node_modules
   git clone https://github.com/Motuo24/dsh-thinking-slider.git thinking-slider
   # or copy the thinking-slider directory here manually
   

2. Insert the plugin row into the DSH profile's composition patch:

   # %DSH_HOME%\profiles\web\cordis.patch.yml
   - insert:
       - id: thinking-slider
         name: thinking-slider
   

3. Restart the DSH process (client-modules scans dsh.client declarations at startup and composes the plugin into the browser boot graph). Open the web UI, go to the model picker → "Thinking strength" to see the slider.

Project structure

thinking-slider/
├── package.json       # dsh.client declaration (platform: web) + exports["./client"]
└── lib/
    ├── index.js       # host half: empty apply, just so the Loader recognizes the row
    └── client.js      # browser half: full UI in window.__ModuleLoader__.load format

License

MIT