DeepSeek Harness

Install dsh and add Triw as a custom model API in the harness UI.

DeepSeek Harness (dsh) is DeepSeek’s plugin-based agent harness with a web UI. Providers are configured in the UI and stored in the active profile.

Requirements

Item	Note
Node	20+
pnpm	required for the global install
OS	macOS, Linux, Windows (WSL recommended)

Install

npm install -g pnpm          # skip if pnpm is already present
pnpm add -g @deepseek-ai/dsh
dsh --version

Run it:

dsh            # boots the default profile and opens the web UI

Configure

In the harness UI: Settings → Models → Custom model API.

Field	Value
Provider ID	triw (lowercase, permanent once saved)
Base URL	https://router.triw.io/v1
API protocol	OpenAI Chat Completions
Credential	your sk-... Triw key
Model	one id from GET /v1/models, e.g. claude-sonnet-4-5

The protocol maps to a stored value in the active profile’s cordis.patch.yml:

UI label	Stored value
OpenAI Chat Completions	openai-completions
OpenAI Responses	openai-responses
Anthropic Messages	anthropic-messages
Gemini API	google-generative-ai

A provider speaks one protocol. Triw serves both chat-completions and Anthropic messages — if you need both shapes, register two providers (triw and triw-anthropic). Credentials live in $DSH_HOME/.credentials.yaml, not in the profile file.

Verify

Start a session and send reply with the single word: ready. Then confirm the call in Triw Logs.

Troubleshooting

Symptom	Cause	Fix
pnpm: command not found	pnpm missing	npm install -g pnpm
Provider invisible in picker	Saved under a different profile	Switch profile, or re-add under the active one
404	Wrong protocol for the route	Chat Completions for /v1/chat/completions
401	Credential rejected after URL edit	Re-enter the key; credentials are write-only