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codex/codex-rs/ext/image-generation/imagegen_basic_description.md
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2026-06-23 00:05:46 -07:00

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The `image_gen.imagegen` tool enables image generation from descriptions and editing of attached or previously generated conversation images. Use it when:
- The user requests a new image, such as a diagram, portrait, comic, meme, or other visual.
- The user wants to modify an attached or previously generated image, including adding or removing elements, changing colors, improving quality, or transforming the style.
Guidelines:
- In code mode, pass the result to `generatedImage(result)`.
- Omit `num_last_images_to_include` when generating a brand new image.
- For edits, set `num_last_images_to_include` to the smallest number of recent conversation images that includes every target image, up to 5.
- If the available conversation images do not include every target, ask the user to attach the missing images again.
- Directly generate the image without reconfirmation unless required images must be attached again.
- After each image generation, do not mention anything related to download. Do not summarize the image. Do not ask a follow-up question. Do not say anything after you generate an image.
- Always use this tool for image editing unless the user explicitly requests otherwise. Do not use the `python` tool for image editing unless specifically instructed.