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image-gen-core (#13290)

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Core tool-calling for image-gen, handles requesting and receiving logic
for images using response API
This commit is contained in:
Won Park
2026-03-03 23:11:28 -08:00
committed by GitHub
parent 4f6c4bb143
commit fa2306b303
22 changed files with 766 additions and 45 deletions
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60
codex-rs/protocol/src/models.rs
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@@ -313,6 +313,23 @@ pub enum ResponseItem {
#[ts(optional)]
action: Option<WebSearchAction>,
},
// Emitted by the Responses API when the agent triggers image generation.
// Example payload:
// {
// "id":"ig_123",
// "type":"image_generation_call",
// "status":"completed",
// "revised_prompt":"A gray tabby cat hugging an otter...",
// "result":"..."
// }
ImageGenerationCall {
id: String,
status: String,
#[serde(default, skip_serializing_if = "Option::is_none")]
#[ts(optional)]
revised_prompt: Option<String>,
result: String,
},
// Generated by the harness but considered exactly as a model response.
GhostSnapshot {
ghost_commit: GhostCommit,
@@ -1286,6 +1303,49 @@ mod tests {
);
}
#[test]
fn response_item_parses_image_generation_call() {
let item = serde_json::from_value::<ResponseItem>(serde_json::json!({
"id": "ig_123",
"type": "image_generation_call",
"status": "completed",
"revised_prompt": "A small blue square",
"result": "Zm9v",
}))
.expect("image generation item should deserialize");
assert_eq!(
item,
ResponseItem::ImageGenerationCall {
id: "ig_123".to_string(),
status: "completed".to_string(),
revised_prompt: Some("A small blue square".to_string()),
result: "Zm9v".to_string(),
}
);
}
#[test]
fn response_item_parses_image_generation_call_without_revised_prompt() {
let item = serde_json::from_value::<ResponseItem>(serde_json::json!({
"id": "ig_123",
"type": "image_generation_call",
"status": "completed",
"result": "Zm9v",
}))
.expect("image generation item should deserialize");
assert_eq!(
item,
ResponseItem::ImageGenerationCall {
id: "ig_123".to_string(),
status: "completed".to_string(),
revised_prompt: None,
result: "Zm9v".to_string(),
}
);
}
#[test]
fn convert_mcp_content_to_items_builds_data_urls_when_missing_prefix() {
let contents = vec![serde_json::json!({