The recent Codex OAuth provider work mainly adds regression coverage for image generation. Tests cover plain generate requests, local-reference edit requests, SSE output backfill, duplicate output removal, and token refresh retry after 401/403.
That matters for upper-layer plugins. ImgFlow and similar tools call generate_image() without handling Codex backend events directly. When the provider keeps request shape, result file storage, and token refresh behavior stable, task folders and result delivery can stay simple above it.