Generate image(s) with OpenAI's Images API and save them to assets/images.

Args: prompt: Text description of the image to generate. size: WIDTHxHEIGHT (e.g. "1024x1024", "1536x1024"). gpt-image-2 supports arbitrary sizes with width/height divisible by 16. quality: "low", "medium", or "high". n: Number of images (1-10 for gpt-image-2). model: Override the model id (default from OPENAI_IMAGE_MODEL / gpt-image-2). filename: Optional base filename (without extension) for a single image.

Returns: A human-readable summary listing the saved file path(s).

Generate an image with Google Gemini (Nano Banana) and save to assets/images.

Args: prompt: Text description of the image to generate. model: Override the model id (default from GEMINI_IMAGE_MODEL / gemini-2.5-flash-image). Newer option: a Nano Banana 2 / Gemini 3.x Flash Image id if enabled on your key. filename: Optional base filename (without extension).

Returns: A human-readable summary listing the saved file path(s).

Generate a video with Google Veo (via Gemini API) and save to assets/videos.

This is an async operation: the tool submits the job, polls until done, then downloads the result. It can take a few minutes.

Args: prompt: Text description of the video to generate. model: Override the model id (default from GEMINI_VIDEO_MODEL / veo-3.1-generate-001). Use veo-3.1-fast-generate-preview for speed. negative_prompt: Optional description of what to avoid. aspect_ratio: "16:9" or "9:16". filename: Optional base filename (without extension).

Returns: A human-readable summary with the saved video path.