Image generation via Codex

The Codex CLI ships a built-in image_gen tool (no API key needed). It is exposed by no flag — the model calls it when the prompt asks for an image. This skill is the thin wrapper that gets the invocation right: writable sandbox, destination directory, output path read back reliably.

Codex already owns the image-prompting policy — its system skill covers style, sizing, text accuracy, transparency and batching. Do not duplicate or override it: pass the user's request through and let Codex augment it. Dictate size, style or quality only when the user asked for them.

Resolve the destination first

The tool writes into ~/.codex/generated_images/<thread-id>/ — outside the workspace, under a generated filename whose shape has changed between CLI versions, so never predict it. There is no destination argument: without an explicit copy instruction in the prompt, the image never leaves that directory.