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tighten local image reference guardrails

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David Wiesen
2026-06-28 08:54:33 -07:00
parent c660e2b644
commit d2c1d28b7d
2 changed files with 11 additions and 1 deletions
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4
codex-rs/ext/image-generation/imagegen_description.md
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@@ -6,12 +6,14 @@ The `image_gen.imagegen` tool enables image generation from descriptions and edi
Guidelines:
- In code mode, pass the result to `generatedImage(result)`.
- Omit both `referenced_image_paths` and `num_last_images_to_include` when generating a brand new image.
- If the user wants a new image based on one or more local reference images, treat it as a reference-backed edit request and include those images; do not treat the filename alone as sufficient image input.
- For edits, use `referenced_image_paths` when every target image has a local file path.
- If you have not seen a local image yet, use `view_image` to inspect it before editing.
- Use `num_last_images_to_include` only when at least one target image has no local file path.
- Set `num_last_images_to_include` to the smallest number of recent conversation images that includes every target image, up to 5.
- Never provide both `referenced_image_paths` and `num_last_images_to_include`.
- If neither mechanism can include every target image, ask the user to attach the missing images again.
- If `view_image` fails, `referenced_image_paths` cannot include the required local image, or neither mechanism can include every target image, ask the user to attach the missing images again or fix access first.
- Never fall back to text-only generation when the user asked to use a local reference image that you could not actually attach.
- Directly generate the image without reconfirmation or clarification 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 followup 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.

8
codex-rs/ext/image-generation/src/tool.rs
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@@ -73,9 +73,17 @@ impl ImageGenerationTool {
#[derive(Debug, Deserialize, JsonSchema)]
#[serde(deny_unknown_fields)]
struct ImagegenArgs {
/// A prompt describing the desired output. Do not use a local filename in
/// this text as a substitute for attaching a required reference image.
prompt: String,
/// Absolute local image paths to include as real image inputs. Use this for
/// every required local reference image instead of falling back to text-only
/// generation when the user asked to base the result on those files.
#[schemars(length(max = 5))]
referenced_image_paths: Option<Vec<AbsolutePathBuf>>,
/// The smallest number of recent conversation images needed when at least
/// one required image has no local path. Do not use this when all required
/// reference images are still local files.
#[schemars(range(min = 1, max = 5))]
num_last_images_to_include: Option<usize>,
}