ChatGPT Subscription for DeepSeek Harness

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Use authorized ChatGPT subscription models in DeepSeek Harness. This plugin provides account connections, a model catalog, streaming text, local function tools, and remaining subscription quota when available.

This is an independently maintained third-party plugin, not an official OpenAI or DeepSeek plugin. Validated Harness versions are 0.2.1-rc.5 and 0.2.2-rc.1. Other versions have not been verified.

Installation

Download dsh-chatgpt-provider-<version>.tgz and its .sha256 file from Releases. Add the local package in the Harness plugin manager and enable it. Release packages are prebuilt; users do not need to install Node.js separately, clone the source, or run build scripts.

Current package: v0.2.14. If your plugin manager accepts download links, you can paste this .tgz URL directly.

For CLI installation, replace the profile and filename with your actual values:

dsh plugin --profile <profile> add ./dsh-chatgpt-provider-<version>.tgz

See the installation guide (Chinese) for installation, upgrades, removal, and compatibility details.

Preview

The account and quota shown above are demonstration data. The settings page currently uses Chinese labels; their English meanings are provided below.

Sign in and use models

Open Settings → ChatGPT 订阅 (ChatGPT Subscription) and choose a connection:

Entry	Recommended accounts	Connection
ChatGPT 登录 (ChatGPT login)	Plus / Pro	Official Sign in with ChatGPT (SIWC) flow
Business 登录 (Business login)	Business / Team	Experimental Codex compatibility route

Complete authorization on the official browser page, return to Harness, and choose an available model in the chat model picker. Once connected, expand 切换连接方式 (Switch connection method) to sign in again, or 可用模型 (Available models) to view and refresh the catalog.

Codex connections can show the remaining quota and reset countdown for five-hour and weekly windows. When the official connection does not provide quota data, the page shows an empty state rather than estimating usage. Account-wide historical token analytics are not currently available.

The Business compatibility route is not a third-party integration supported by OpenAI's documentation. It uses the first-party Codex OAuth client and may be affected by workspace policies, terms of service, or interface changes. Use only accounts and workspaces you are authorized to access. Eligibility, models, and actual limits depend on the authorization result.

Development

Requires Node.js ≥24.9 and pnpm 11.28.5:

pnpm install --frozen-lockfile --ignore-scripts
pnpm check
pnpm check:repository
pnpm pack:release

Build output and release packages are written to local lib/ and artifacts/ directories. The repository contains source, tests, and maintained documentation; prebuilt packages are distributed through Releases.

Further documentation:

• Development and verification (Chinese)
• Architecture and protocol boundaries (Chinese)
• Release process (Chinese)
• Third-party notices

Limitations and credentials

• Currently supports text and ordinary local function tools; full multimodal support is not guaranteed.
• Real Plus / Pro inference has not been verified. The Business compatibility route has been verified with real text and tool rounds. Automated tests do not establish account eligibility.
• Only one connection is active at a time. Switching methods requires signing in again and replaces the current connection.
• Credentials are stored by the Harness credentials service, not in plugin configuration, browser state, or distribution packages. The plugin does not read other applications' login caches or fall back to API-key billing.
• After signing out locally, you can manage remote authorization in ChatGPT usage and permissions settings.

License

MIT. Find the project through GitHub's dsh-plugin topic.