Add ChatGPT Plus/Pro OAuth login support#1873
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Add 'chatgpt' as a provider alias so users with a ChatGPT Plus/Pro subscription can use models like chatgpt/o3 without a separate API key. Authentication uses the OAuth2 PKCE flow against auth.openai.com (the same flow as the Codex CLI). After obtaining OAuth tokens, the id_token is exchanged for a standard OpenAI API key via token exchange. Tokens are persisted to ~/.config/cagent/chatgpt_token.json and automatically refreshed when expired. New CLI commands: cagent login chatgpt - authenticate via browser cagent logout chatgpt - remove stored credentials New package pkg/chatgpt with auth, token storage, and an environment.Provider that resolves CHATGPT_ACCESS_TOKEN. Assisted-By: cagent
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Add 'chatgpt' as a provider alias so users with a ChatGPT Plus/Pro subscription can use models like chatgpt/o3 without a separate API key.
Authentication uses the OAuth2 PKCE flow against auth.openai.com (the same flow as the Codex CLI). After obtaining OAuth tokens, the id_token is exchanged for a standard OpenAI API key via token exchange. Tokens are persisted to ~/.config/cagent/chatgpt_token.json and automatically refreshed when expired.
New CLI commands:
cagent login chatgpt - authenticate via browser
cagent logout chatgpt - remove stored credentials
New package pkg/chatgpt with auth, token storage, and an environment.Provider that resolves CHATGPT_ACCESS_TOKEN.
Assisted-By: cagent