DIT.ai for DeepSeek Harness

Use the DIT.ai conversational model catalog in DeepSeek Harness. This profile bundle adds DIT.ai 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

Start Harness:

npx @deepseek-ai/dsh web

On first Web-profile launch, a one-time DIT guide lets users register, open the API-key page, and save the key through Harness Credentials. The plugin cannot read stored plaintext and does not send the key anywhere except the configured DIT API endpoint.

See installation and troubleshooting for version verification, onboarding recovery, network access, and compatibility details.

You can also skip the guide and use an environment variable:

export DIT_API_KEY="your-dit-api-key"

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)

DIT.ai exposes every current DIT model that supports OpenAI Chat Completions. DIT.ai Messages exposes every model that supports Anthropic Messages. Both providers 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"

Discover inside Harness

The plugin is listed in the community directory used by dsh-market and can also be found by dsh-find-plugin.

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

Open the Market tab and search for DIT or dsh-plugin-dit.

Protocol support

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

Use DIT.ai for OpenAI-compatible clients. Use DIT.ai Messages for Anthropic content blocks, tool use, native Messages streaming events, and thinking budgets.

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
• Chat models: all 29 models currently advertised with openai_chat_completions, including Claude, DeepSeek V4, Gemini, GLM, GPT, Grok, Kimi, and MiniMax families
• Messages models: all 10 Claude models currently advertised with anthropic_messages
• Native Messages thinking with Off, High, and Max levels
• One-time Web onboarding for registration, key creation, and secure Harness Credentials storage

The API key is resolved by Harness at request time and is never embedded in the plugin. DIT's authenticated /v1/models response is the protocol authority. Image, audio, and video models are not listed because Harness consumes conversational model APIs.

Security

The bundle contains no API key. Harness Credentials does not expose stored plaintext back to the plugin, but the default local Harness backend persists it unencrypted in $DSH_HOME/.credentials.yaml with filesystem mode 0600. See the complete security policy and report security issues privately through GitHub Security Advisories.

Local development

From this directory:

pnpm test
pnpm smoke:harness
DIT_API_KEY="your-dit-api-key" node scripts/check-catalog.mjs
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. scripts/check-catalog.mjs compares the bundled model IDs with DIT's live protocol declarations without making a model request.

Uninstall

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

License

MIT