dsh-plugin-dit

DIT.ai for DeepSeek Harness

Use DeepSeek V4 through DIT.ai in DeepSeek Harness. This profile bundle adds DIT as a native model provider while keeping the stock Harness runtime and tools unchanged.

Install

DeepSeek Harness requires Node.js 22.19 or newer and pnpm.

npx @deepseek-ai/dsh plugin --profile web add dsh-plugin-dit

Set the DIT API key, then start Harness:

export DIT_API_KEY="your-dit-api-key"
npx @deepseek-ai/dsh web

Open Settings → Models, then choose a model and protocol:

• DIT.ai: recommended default using OpenAI Chat Completions (/v1/chat/completions)
• DIT.ai Messages: Anthropic Messages (/v1/messages)

Both providers expose deepseek-v4-flash and deepseek-v4-pro and share the same DIT_API_KEY.

For headless runs:

npx @deepseek-ai/dsh plugin --profile headless add dsh-plugin-dit
export DIT_API_KEY="your-dit-api-key"
npx @deepseek-ai/dsh --profile headless "Explain this repository"

Protocol support

Provider	Harness API	DIT endpoint	Thinking
dit	openai-completions	/v1/chat/completions	DeepSeek thinking dialect
dit-messages	anthropic-messages	/v1/messages	Native Anthropic Messages thinking

DIT.ai follows the official default protocol for DeepSeek V4. Use DIT.ai Messages for workflows that need Anthropic content blocks, tool use, or native Messages streaming events.

What the bundle configures

• Provider routes: dit and dit-messages
• OpenAI Chat base URL: https://api.dit.ai/v1
• Anthropic Messages base URL: https://api.dit.ai (Harness appends /v1/messages)
• Credential reference: DIT_API_KEY
• Attribution header: X-DIT-Integration: deepseek-harness
• Models: deepseek-v4-flash, deepseek-v4-pro
• DeepSeek thinking dialect with Off, High, and Max levels

The API key is resolved by Harness at request time and is never embedded in the plugin.

Local development

From this directory:

pnpm test
pnpm smoke:harness
npx @deepseek-ai/dsh plugin --profile web add .
npx @deepseek-ai/dsh --profile web --dump-config

pnpm smoke:harness runs the official Harness headless agent against local /v1/chat/completions and /v1/messages mocks. It verifies attribution, both authentication header styles, models, stream events, and thinking parameters without spending API credit.

Uninstall

npx @deepseek-ai/dsh plugin --profile web remove dsh-plugin-dit

License

MIT