c7c2b3cf8d
### Motivation - The local OAuth callback server returned a generic "Invalid OAuth callback" on failures even when the query contained an `error_description`, making it hard to debug OAuth failures. ### Description - Update `codex-rs/rmcp-client/src/perform_oauth_login.rs` to surface `error_description` values from the callback query in the HTTP response. - Introduce a `CallbackOutcome` enum and change `parse_oauth_callback` to return it, parsing `code`, `state`, and `error_description` from the query string. - Change `spawn_callback_server` to match on `CallbackOutcome` and return `OAuth error: <description>` with a 400 status when `error_description` is present, while preserving the existing success and invalid flows. - Use inline formatting for the error response string. ### Testing - Ran `just fmt` in the `codex-rs` workspace to format changes successfully. - Ran `cargo test -p codex-rmcp-client` and all tests passed. ------ [Codex Task](https://chatgpt.com/codex/tasks/task_i_6971aadc68d0832e93159efea8cd48a9) |
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