DeepSeek Harness

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Set up with the Phaseo CLI

phaseo login
phaseo deepseek-harness

• writes the provider, base URL, protocol, model catalog, and default model to $DSH_HOME/cordis.patch.yml (DSH_HOME defaults to ~/.dsh), inside a marked block so it can later update or remove only its own settings;
• adds every active Phaseo text model that works with Chat Completions. Use --catalog default to add only the default model;
• creates a Phaseo CLI: DeepSeek Harness API Key that expires after 90 days and has a $100 monthly spend limit, and writes it to Harness's protected `$DSH_HOME/.credentials.yaml. Run phaseo deepseek-harness` again to replace an expired key.

phaseo deepseek-harness --model YOUR_PHASEO_MODEL_ID

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Add Phaseo in the Harness UI

1. Open Settings > Models and choose Add a custom provider.
2. Enter:

3. Under Model catalog, choose Fetch available models.
4. Select a Chat Completions model with tool support, such as anthropic/claude-sonnet-5.5, and save the provider.
5. In the composer, choose the Phaseo model and start a new session.

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Configure Phaseo in settings.yaml

llm-pi-ai:
  providers:
    phaseo:
      displayName: Phaseo
      apiKeyEnv: PHASEO_API_KEY
      api: openai-completions
      baseURL: https://api.phaseo.app/v1
      models:
        - id: YOUR_PHASEO_MODEL_ID

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Check it works

curl https://api.phaseo.app/v1/models \
  -H "Authorization: Bearer $PHASEO_API_KEY"

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Remove Phaseo

phaseo integrations remove deepseek-harness

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Fix common problems