Files
codex/codex-rs/app-server-protocol/schema/json/DynamicToolCallResponse.json
Owen Lin 5ea107a088 feat(app-server, core): allow text + image content items for dynamic tool outputs (#10567)
Took over the work that @aaronl-openai started here:
https://github.com/openai/codex/pull/10397

Now that app-server clients are able to set up custom tools (called
`dynamic_tools` in app-server), we should expose a way for clients to
pass in not just text, but also image outputs. This is something the
Responses API already supports for function call outputs, where you can
pass in either a string or an array of content outputs (text, image,
file):
https://platform.openai.com/docs/api-reference/responses/create#responses_create-input-input_item_list-item-function_tool_call_output-output-array-input_image

So let's just plumb it through in Codex (with the caveat that we only
support text and image for now). This is implemented end-to-end across
app-server v2 protocol types and core tool handling.

## Breaking API change
NOTE: This introduces a breaking change with dynamic tools, but I think
it's ok since this concept was only recently introduced
(https://github.com/openai/codex/pull/9539) and it's better to get the
API contract correct. I don't think there are any real consumers of this
yet (not even the Codex App).

Old shape:
`{ "output": "dynamic-ok", "success": true }`

New shape:
```
{
    "contentItems": [
      { "type": "inputText", "text": "dynamic-ok" },
      { "type": "inputImage", "imageUrl": "data:image/png;base64,AAA" }
    ]
  "success": true
}
```
2026-02-04 16:12:47 -08:00

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JSON

{
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"DynamicToolCallOutputContentItem": {
"oneOf": [
{
"properties": {
"text": {
"type": "string"
},
"type": {
"enum": [
"inputText"
],
"title": "InputTextDynamicToolCallOutputContentItemType",
"type": "string"
}
},
"required": [
"text",
"type"
],
"title": "InputTextDynamicToolCallOutputContentItem",
"type": "object"
},
{
"properties": {
"imageUrl": {
"type": "string"
},
"type": {
"enum": [
"inputImage"
],
"title": "InputImageDynamicToolCallOutputContentItemType",
"type": "string"
}
},
"required": [
"imageUrl",
"type"
],
"title": "InputImageDynamicToolCallOutputContentItem",
"type": "object"
}
]
}
},
"properties": {
"contentItems": {
"items": {
"$ref": "#/definitions/DynamicToolCallOutputContentItem"
},
"type": "array"
},
"success": {
"type": "boolean"
}
},
"required": [
"contentItems",
"success"
],
"title": "DynamicToolCallResponse",
"type": "object"
}