# dsh-think-any-lang
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[](README.en-US.md)
[](README.md)
[](https://github.com/topics/dsh-plugin)
[](index.js)
[](index.js)
[](client.js)
A DeepSeek Harness plugin that adds a **Thinking Language** dropdown under **Settings → General**, letting you choose which language the model uses for its reasoning / chain of thought (中文, English, 日本語, 한국어, Deutsch, …). **The final reply stays in the user's language.**
Screenshots · Features · How it works · Installation · Usage · Development · Publishing · Star History
---
## Screenshots
Selector in General settings
Pick it right from the settings page |
The selector box
Click to expand and pick a language |
All languages in one dropdown
off plus 12 languages in one list |
In the plugin list
Listed under plugin management after install |
---
## Features
- **Settings → General → Thinking Language**: a dropdown to pick the language the model thinks in.
- **Zero latency, zero extra calls**: implemented as a system-prompt instruction (`systemPrompt.section`) — no extra model calls or response delay like "translate the reasoning" approaches.
- **Instructions written in the target language**: each instruction is written in its own language (e.g. the English instruction is written in English), which improves model adherence.
- **Persisted**: the choice is stored in the user settings document (settings service) and survives restarts.
- **Plain JS, no build step**: both the host and browser halves are hand-written JavaScript; install straight from GitHub with zero friction.
Supported languages: `off` (follow default, no instruction), Simplified Chinese, English, 日本語, 한국어, Deutsch, Français, Español, Português, Русский, Italiano, العربية, हिन्दी.
---
## How it works
| Half | Responsibility |
|---|---|
| `index.js` (host half) | Registers the `think-any-lang` settings namespace (`language` field, enum, default `zh`); watches for changes and mounts `systemPrompt.section` (named `think-any-lang`) when non-`off`, unmounts on `off`; also registers a private loopback RPC channel `/think-any-lang` (`get`/`set`) that the browser half uses to read/write the namespace |
| `client.js` (browser half) | Registers a `settings.general.item` row via the `window.__ModuleLoader__.load` contract; renders the dropdown and reads/writes the setting through the host half's `/think-any-lang` RPC channel |
> **Why a private RPC channel instead of the settings RPC surface?** `dsh-host-apiproxy` only exposes an explicit allowlist of settings namespaces to configuration clients (`WEB_SETTINGS_NAMESPACES` / `PRODUCT_SETTINGS_NAMESPACES`); a third-party namespace answers `settings-not-exposed`, so the selection would never persist. The browser half therefore talks to a private channel registered in-process (`ctx.connection.rpc.handle`), and in-process `ctx.settings` access is not filtered by that allowlist — persistence and the `systemPrompt` linkage stay unchanged.
> The language table is maintained in two places — `index.js` (instruction texts) and `client.js` (display labels): the browser factory's `require` only resolves platform modules and cannot read local modules, so each half keeps its own language view. Keep both files in sync when adding a language.
---
## Installation
Requirements: `dsh` CLI installed with an initialized profile (`dsh plugin --profile add` auto-initializes).
### From GitHub (recommended)
```sh
dsh plugin --profile web add github:lco117/dsh-think-any-lang
```
> The package is pure JS with no `prepare` build script, so no pnpm ≥10 `allowBuilds` approval is needed — install straight from GitHub. Pinning to a commit is recommended as in the official docs: `github:lco117/dsh-think-any-lang#`.
### From a local directory (development)
```sh
dsh plugin --profile web add ./dsh-think-any-lang
```
### Verify
```sh
dsh --profile web --dump-config # should show a "# == dsh-think-any-lang" layer
```
---
## Usage
1. Start `dsh web`.
2. Open **Settings → General**.
3. Pick a language in the **Thinking Language** dropdown (default: Chinese).
4. Subsequent model calls receive the thinking-language instruction in the system prompt; DeepSeek reasoning models typically output `reasoning_content` in the chosen language.
---
## Development
```
dsh-think-any-lang/
├── package.json # declares dsh.bundle and dsh.client
├── cordis.patch.yml # plugin row: mounts both halves of this package
├── index.js # host half: settings namespace + systemPrompt.section
├── client.js # browser half: settings row UI (hand-written factory bundle)
├── README.md # 中文说明
├── README.en-US.md # English docs
└── screenshots/ # README screenshots (webp)
```
---
## Tech Stack
| Category | Tech |
|------|------|
| Plugin platform | [DeepSeek Harness (DSH)](https://github.com/deepseek-ai/dsh) |
| Plugin framework | Cordis |
| Language | JavaScript (ESM) |
| Schema | @deepseek-ai/schemastery |
| Build | None (plain JS, install straight from GitHub) |
---
## License
[MIT](LICENSE) © 2026 lco117
---
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