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feat(ai): add OpenAI Codex OAuth + responses provider

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Ahmed Kamal 2026-01-04 21:11:19 +02:00
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commit 1650041a63
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packages/coding-agent/README.md
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@ -156,6 +156,7 @@ Use `/login` to authenticate with subscription-based or free-tier providers:
| GitHub Copilot | GPT-4o, Claude, Gemini via Copilot subscription | Subscription |
| Google Gemini CLI | Gemini 2.0/2.5 models | Free (Google account) |
| Google Antigravity | Gemini 3, Claude, GPT-OSS | Free (Google account) |
| OpenAI Codex (ChatGPT Plus/Pro) | Codex models via ChatGPT subscription | Subscription |
```bash
pi
@ -173,8 +174,18 @@ pi
- Antigravity uses a sandbox endpoint with access to Gemini 3, Claude (sonnet/opus thinking), and GPT-OSS models
- Both are free with any Google account, subject to rate limits
**OpenAI Codex notes:**
- Requires ChatGPT Plus/Pro OAuth (`/login openai-codex`)
- Prompt cache stored under `~/.pi/agent/cache/openai-codex/`
- Intended for personal use with your own subscription; not for resale or multi-user services. For production, use the OpenAI Platform API.
Credentials stored in `~/.pi/agent/auth.json`. Use `/logout` to clear.
**Troubleshooting (OAuth):**
- **Port 1455 in use:** Close the conflicting process or paste the auth code/URL when prompted.
- **Token expired / refresh failed:** Run `/login` again for the provider to refresh credentials.
- **Usage limits (429):** Wait for the reset window; pi will surface a friendly message with the approximate retry time.
### Quick Start
```bash
@ -525,7 +536,7 @@ Add custom models (Ollama, vLLM, LM Studio, etc.) via `~/.pi/agent/models.json`:
}
```
**Supported APIs:** `openai-completions`, `openai-responses`, `anthropic-messages`, `google-generative-ai`
**Supported APIs:** `openai-completions`, `openai-responses`, `openai-codex-responses`, `anthropic-messages`, `google-generative-ai`
**API key resolution:** The `apiKey` field is checked as environment variable name first, then used as literal value.
@ -913,7 +924,7 @@ pi [options] [@files...] [messages...]
| Option | Description |
|--------|-------------|
| `--provider <name>` | Provider: `anthropic`, `openai`, `google`, `mistral`, `xai`, `groq`, `cerebras`, `openrouter`, `zai`, `github-copilot`, `google-gemini-cli`, `google-antigravity`, or custom |
| `--provider <name>` | Provider: `anthropic`, `openai`, `openai-codex`, `google`, `mistral`, `xai`, `groq`, `cerebras`, `openrouter`, `zai`, `github-copilot`, `google-gemini-cli`, `google-antigravity`, or custom |
| `--model <id>` | Model ID |
| `--api-key <key>` | API key (overrides environment) |
| `--system-prompt <text\|file>` | Custom system prompt (text or file path) |