Codex Connect
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Connect your ChatGPT subscription to DeepSeek Harness with OAuth, optional GPT Image generation, user-controlled defaults, Harness-native approvals, diagnostics, and reliable session recovery.
Community Alpha — not affiliated with or endorsed by OpenAI, ChatGPT, Codex, DeepSeek, or DeepSeek Harness.
Codex Connect adds the openai-codex model provider to the normal Harness agent loop. Harness continues to manage tools, permissions, approvals, attachments, session persistence, compaction, and recovery. Installing the plugin does not change your default model or search route, and it does not turn a ChatGPT subscription into an OpenAI Platform API key.
Quick start
This guide describes the published pairing below. Check dsh --version first; for another DSH version, use Installation and upgrades. A moving npm tag such as alpha is not a compatibility guarantee.
| Requirement | Verified pairing |
|---|
| Codex Connect | 0.1.0-alpha.4.33 |
| DeepSeek Harness | 0.1.2-rc.1 or 0.1.5-alpha.1 |
| Node.js | ^22.19.0 || >=24.0.0 |
| Account | ChatGPT OAuth with access to the requested Codex model; availability is decided by OpenAI |
1. Install
dsh plugin --profile web add dsh-codex-connect@0.1.0-alpha.4.33
dsh web
Replace web with your existing profile name; use that same profile when starting Harness. From a DSH source checkout, prefix commands with pnpm. See INSTALL.md for other profiles and installation checks.
2. Authorize and select a model
Open Settings → Models → Openai-Codex → Authorize, then complete approval yourself in the browser. If an embedded window is blocked, select Open ChatGPT sign-in page. Choose an openai-codex model in the normal Harness model picker.
Never paste an authorization URL, code, token, or account identifier into an issue, log, chat, or configuration file. For a browser on another device, the optional manual callback form can complete the pending login without forwarding the localhost callback port; follow Remote browser authorization.
3. Check the installation
dsh plugin --profile web exec dsh-codex-connect status --json
dsh plugin --profile web exec dsh-codex-connect doctor --json
status --json exits 0 when signed in and 1 when signed out, without starting OAuth. doctor --json reports local installation diagnostics without a network request or raw credentials. A passing diagnostic is not proof of model access; verify that with an actual request.
Codex Connect — ChatGPT OAuth for DeepSeek Harness
Core capabilities
- Accounts: save up to 16 accounts on the DSH host and manually select the active account for subsequent requests. Account selection is not a per-session binding. Requests keep their captured account; the plugin does not rotate accounts or silently fail over.
- Models and Astra support: the currently verified DSH and plugin combination supports
gpt-6-astra. The plugin supplies its missing model definition with Low, Medium, High, Xhigh, and Max reasoning levels; Default preserves the provider default. Saved Off/Minimal selections require an explicit update. When the installed dependency catalog includes Astra, the plugin preserves its native metadata while retaining these five calibrated reasoning choices. A model appearing in the list does not mean the current account has permission to use it; overall compatibility with new dependency versions still requires separate verification.
- Fast Mode: request priority service for one conversation, off by default. Actual speed and quota consumption depend on the service; no fixed speed multiplier is guaranteed.
- Quota: show the server-returned
5h and 7d windows and reset times, normally refreshed every 60 seconds while signed in. Missing windows are not invented; Spark uses its separate quota bucket.
- Plugin updates: check for newer Codex Connect releases without installing anything or recommending changes to DSH. Host compatibility is available through explicit local diagnostics.
Fast Mode and quota controls in the DeepSeek Harness Composer
Optional capabilities
All options below are off on a fresh installation. Edit them in Settings → Plugins → Plugin configuration → Codex Connect or Settings → Models → Openai-Codex → More settings, then select Save changes. A conflict or failed save preserves your draft.
| Capability | Enable with | Important behavior |
|---|
| Proxy | enableProxy | Credential-free HTTP(S), scoped to this plugin's traffic. A failed proxy request does not silently retry directly. |
| Codex Search | enableSearch | Selects Codex for the entire profile's search route; disabling restores the previously active route. |
| Image viewing | enableImageTool | Adds view_image to vision-capable models for local files and validated public HTTP(S) images. |
| GPT Image generation | enableImageGeneration | Prompt-only generation; availability, dimensions, and quota remain account- and service-controlled. |
| Auto-review | enableAutoReview | Sends bounded approval context, tool arguments, working directory, and the planned action to chatgpt.com, with confirmation on first enablement. Failures return to human approval. |
Use the image generation capability included with your current GPT subscription. Generated originals are stored separately from attachment previews; disabling the capability or uninstalling the plugin does not delete them. See Configuration and recovery for storage and access rules.
Auto-review operates after Harness policy requires approval; it does not bypass that policy. See Auto-review behavior before enabling it.
FAQ and important limits
Where are my credentials stored?
OAuth credentials are stored on the host running DSH and used there to authenticate and send requests to OpenAI. Normal browser account responses return account summaries, not raw tokens. A remote browser device is not necessarily the DSH host.
Does uninstalling sign me out?
No. OAuth state is stored separately at $DSH_HOME/.openai-codex-auth.json (~/.dsh by default). The plugin does not copy or modify ~/.codex/auth.json. Use Sign out all accounts, or logout before uninstalling, only when deleting credentials is intentional.
Can I switch accounts for different conversations?
Subsequent Codex requests use the selected active account; conversations do not bind their own accounts. Fast Mode is conversation-scoped. Cancelling a new authorization preserves existing accounts; an explicit revoked-refresh response asks for reauthorization, while temporary failures preserve the account for retry. See Account behavior.
Why does a listed model fail?
Account permissions, plugin/host compatibility, and network conditions all affect availability. Access on another client does not guarantee this integration will work. OpenAI controls model access, quota, context capacity, and service behavior; catalog entries are not proof of entitlement.
Can I keep the original dsh-codex plugin installed?
Not in the same effective configuration: both register openai-codex. Follow MIGRATION.md; remove only the confirmed conflicting entry, not credentials or unrelated providers.
What do diagnostics prove?
doctor is local. Capability and reviewer probes may make network requests and consume quota when their preconditions are met. auto-review-probe checks only the reviewer route and structured response, not the full Harness approval integration or execution of the reviewed action. Commands, limits, and exit codes are in the diagnostics reference.
A missing entry in verified-compatibility.json means a DSH/plugin combination is unverified, not known to be broken. Do not infer support for newer hosts from an older pairing.
Documentation and development
pnpm install --frozen-lockfile
pnpm run check
pnpm run test:browser
pnpm run check:dsh-install
check covers static checks, unit tests, build, compatibility, and packaging. lint:metadata checks package and release rules; lint:source checks host and browser TypeScript for unhandled or misused promises, invalid awaits, duplicate cases, and unreachable code. Browser regression and isolated DSH installation are separate commands. These checks use no real OAuth authorization and do not replace real-account acceptance.
License and acknowledgements
Copyright 2026 Frank Song for Codex Connect modifications and additional work. This project contains software derived from Yan-Zero/dsh-codex; Copyright 2026 Yan-Zero is retained for upstream material. Both are distributed under Apache-2.0; see NOTICE.
