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How to run DSH sessions on a ChatGPT subscription with DSH Plugin Subscriptions

Log in to Codex once in the DSH web UI and pick its live models in any session without an API key.

Credentials. OAuth tokens are stored in ~/.dsh/plugins/subscriptions/auth.json, so anyone with access to that file can use the logged-in account.

Who it is forA developer who pays for ChatGPT Plus or Pro and wants to use DSH as a coding or research assistant without buying API credits.

The problemRunning DSH normally needs a separate provider API key and billing, which duplicates a subscription the user already has.

The outcomeCodex models appear in the session model picker, and chat requests run through the ChatGPT subscription.

What you need first

  • DeepSeek Harness (DSH) installed, with a web UI you can open
  • An active ChatGPT Plus or Pro, Claude Pro or Max, or X Premium subscription, or a GitHub Copilot or Google Antigravity account, for the provider you want
  • Permission to install the plugin into DSH, following the Install section of the README

Steps

  1. Install the plugin into DSH by following the Install section of the README.
  2. Open the DSH web UI and go to Settings, then Subscriptions.
  3. Click login on the ChatGPT (Codex) card and finish the OAuth login in the browser.
  4. Open a new session and choose a Codex model from the session model picker.
  5. Send a short test prompt and confirm the reply comes back from the selected model.

Prompt for your agent

Using the dsh-plugin-subscriptions repo, log in to the ChatGPT (Codex) subscription in DSH Settings, Subscriptions, then start a session with the Codex model <model-name>. Expected output: a normal chat reply from that model. Verify that the Codex card shows as logged in and the model appears in the session picker.

Caveat. The plugin uses your subscription login rather than an API key, so usage is limited by your ChatGPT plan, and the README does not promise any particular rate.

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