$imagegen skill loads, but built-in image-generation tool is not registered

What version of the Codex App are you using (From “About Codex” dialog)?

26.727.40816

What subscription do you have?

Pro

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Title:
Codex Desktop 26.727.40816: $imagegen skill loads, but built-in image-generation tool is not registered

Date observed:
2026-07-31

Environment:

• Codex Desktop bundle: com.openai.codex
• App version: 26.727.40816
• App build: 6067
• Embedded Codex CLI: 0.146.0-alpha.9.2
• Chromium: 150.0.7871.182
• macOS: 26.5.1 (build 25F80)
• Architecture: arm64

Reproduction:

1. Open a local repository task in Codex Desktop.
2. Request use of the built-in imagegen skill.
3. The bundled imagegen SKILL.md loads successfully.
4. Inspect the complete callable-tool inventory for the task.
5. No image-generation capability is present, so no generation request can be submitted.

Observed diagnostic:
{
"diagnostic": "Built-in image generation capability lookup",
"expected_capability_names": [
"image_gen",
"imagegen",
"generate_image",
"generate_images"
],
"matching_callable_tools": [],
"result": "NO_CALLABLE_IMAGE_GENERATION_TOOL_REGISTERED"
}

Expected:
The built-in image-generation tool should be registered for the task so the
$imagegen workflow can invoke GPT Image 2.

Important:
This is not an image API failure. There is no HTTP status, request ID, model
error, or generation error because the image-generation call cannot be created.
The skill instructions are installed, but the runtime capability they depend on
is absent from the task’s tool manifest.

What steps can reproduce the bug?

Feedback ID: 019fb078-7cfd-7f43-bb40-9239195b1fd6

What is the expected behavior?

_No response_

Additional information

_No response_