DSH Claude Style Reasoning Slider

An animated reasoning-effort slider and model picker for DeepSeek Harness (DSH). It replaces the native model selector's conversation.input.model slot with a compatible selector whose reasoning pane is a Claude-style animated slider.

🇨🇳 中文版说明请见 README.zh.md

Preview

Features

• Drop-in model selector — replaces only the conversation.input.model slot; the rest of the chat input stays untouched.
• Canonical effort slider — always shows Off | Low | Medium | High | Extra | Max positions, regardless of how the provider names its levels.
• Tolerant name matching — aliases such as off, none, disabled, ultracode → max, med → medium, extreme → extra, and similar display names are mapped to canonical slider positions.
• Unsupported levels stay visible — a level the current model does not support is dimmed but remains clickable. Clicking it keeps the thumb on the chosen slot and applies the nearest supported level below it, with a toast explaining the downgrade.
• Model switching preserves effort — when you switch models, the current effort is kept when possible, or automatically downgraded to the nearest supported level below it (with a toast).
• Default and adapter-specific strengths — Default is offered as a pill below the slider and submits without reasoningEffort (the provider's own default applies). Other provider strengths that do not map to a canonical slider position are also shown as selectable pills.
• Max / Ultracode treatment — the model's max/ultracode level turns the slider into an animated purple pixel field, and the Max label becomes a flowing multi-color gradient text.
• Localized and theme-aware — ships with English and Simplified Chinese dictionaries and follows DSH light/dark design tokens.
• Accessible — keyboard-operable slider (arrows, Home/End, PageUp/PageDown), ARIA labels, focus management, and prefers-reduced-motion support.

Install

Install the bundle from a Git repository:

dsh plugin --profile web add github:YOUR_ACCOUNT/dsh-client-ui-effort-slider
dsh --profile web

Or use a local checkout:

dsh plugin --profile web add ./dsh-client-ui-effort-slider

Restart the web profile after installing or removing the bundle.

Usage

1. Click the model/effort trigger chip in the conversation input.
2. In the popup menu, choose Model to switch models, or Effort to adjust the reasoning level of the current model.
3. In the effort pane:
   • Drag or click the slider to pick Off, Low, Medium, High, Extra, or Max.
   • If a position is unsupported, the thumb stays where you clicked and the nearest supported level below is applied; a toast tells you what happened.
   • Click Default to remove reasoningEffort and let the provider decide.
   • Click any extra pill to apply a provider-specific strength that does not map to a slider position.
4. When switching models, the plugin preserves the current effort level where supported; otherwise it downgrades to the nearest supported level below or falls back to Default, always with a toast.

UI effects

• Trigger chip — shows the current model and effort label, six rising signal bars that fill with the current level, and a chevron. At Max the effort label flows as a purple gradient.
• Two-level popup menu — a compact menu with a model list (grouped by provider) and an effort pane; loading/error/retry states are included.
• Glass track — inner bevel shadows and a subtle fractal-noise layer break up flat-color banding.
• Light field — the track responds to the pointer like a light source: an interior light pool and a glass-edge highlight follow the cursor, brightening as the pointer approaches and fading with distance. The light is suppressed at Max so the pixel field stays clean.
• Level labels — faint tick labels; the current level is always shown, hovering near a slot highlights it, and others stay barely visible.
• Max pixel field — at Max the track becomes an animated purple pixel field with a reveal sweep and flowing cell flicker; the Max label uses a flowing multi-color gradient.
• Motion safety — effects use CSS transitions/animations or lightweight event handlers, with no JS animation loops, and prefers-reduced-motion is respected.

Development

Build the client bundle from source:

npm install
npm run build

lib/client.js is generated from src/client.js plus src/ds-effort-slider.js by scripts/build-client.mjs.

Run the standalone component demo:

# open demo/index.html in a browser

The demo page exercises panel mode, inline mode, supported-level combinations, theme switching, and the Max pixel field.

Package contract

This is a DSH bundle, not a dynamic cordis_define snippet. The package uses:

• dsh.bundle.patch (cordis.patch.yml) for self-registration.
• dsh.client.platform: web for the browser half.
• lib/client.js as a prebuilt ModuleLoader artifact, generated from src/.

Files

• src/ds-effort-slider.js — standalone Web Component (shadow DOM, no framework).
• src/client.js — React wrapper + forked model selector plugin logic.
• scripts/build-client.mjs — bundle generator.
• demo/index.html — standalone UI demo.