DSH Claude Provider

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DeepSeek Harness's generic reasoning controls do not fully match the request parameters expected by newer Claude models. A selected level can therefore fail with HTTP 400, or be silently mapped to another effective level, such as Max behaving as High. @mofeng2223/dsh-claude-provider adds an explicit Claude provider type and sends the reasoning parameters that each configured Claude model expects.

What this plugin does

1. Adds a dedicated Claude provider type

   The Models settings page gains a separate Claude Provider form. You can create multiple Provider IDs under this type without mixing them with generic custom providers.

Selecting Add Claude Provider opens the dedicated Anthropic Messages form:

2. Adds model-specific reasoning modes

   Each model can use one of three configurable mode sets:

   • Five levels: Low, Medium, High, XHigh, and Max
   • Four levels: Low, Medium, High, and Max
   • Toggle: On or Off

   New models default to five levels. Claude providers default to High, while toggle-only models default to On. For adaptive-thinking models, the plugin converts the selection to Claude's thinking.type: adaptive and output_config.effort request format instead of allowing the adapter to collapse or reject the selected level.

3. Adds native Anthropic model discovery

   DeepSeek Harness's generic custom provider cannot list models for the anthropic-messages protocol. This plugin adds model discovery for Claude providers through the provider's native Anthropic-compatible GET /v1/models endpoint, including cursor pagination.

4. Fills known Claude model defaults after discovery

   When a discovered model matches a recorded Claude model ID, the plugin automatically fills its context window, maximum output length, and reasoning-mode set. Models entered manually remain fully editable and are not overwritten by this lookup.

5. Leaves every other provider unchanged

   All discovery, defaults, reasoning controls, and request rewriting are limited to Provider IDs explicitly created as Claude Providers. DeepSeek Harness's built-in providers and ordinary custom providers keep their original behavior, even when they use anthropic-messages or expose a claude-* model ID.

Install

Published package

Install the Web profile for the browser interface:

npx @deepseek-ai/dsh plugin --profile web add @mofeng2223/dsh-claude-provider

Install the Headless profile for command-line runs without the Web interface:

npx @deepseek-ai/dsh plugin --profile headless add @mofeng2223/dsh-claude-provider

Restart the corresponding DeepSeek Harness process after installation.

From source

Build and package the repository first:

git clone https://github.com/MoFeng2223/dsh-claude-provider.git
cd dsh-claude-provider
npm install
npm run build
mkdir -p dist
npm pack --pack-destination dist

Install the generated package into the Web profile:

npx @deepseek-ai/dsh plugin --profile web add ./dist/mofeng2223-dsh-claude-provider-*.tgz

Or install it into the Headless profile:

npx @deepseek-ai/dsh plugin --profile headless add ./dist/mofeng2223-dsh-claude-provider-*.tgz

Uninstall

Run the command for each profile where the plugin was installed:

npx @deepseek-ai/dsh plugin --profile web remove @mofeng2223/dsh-claude-provider
npx @deepseek-ai/dsh plugin --profile headless remove @mofeng2223/dsh-claude-provider

Uninstalling the plugin does not delete ~/.dsh/settings.yaml or stored credentials. Existing Claude providers remain configured as ordinary custom anthropic-messages routes, but lose the Claude-specific interface, model discovery, defaults, reasoning controls, and adaptive request conversion supplied by this plugin.

License

MIT