image-gen-router

Image Gen Router

Generate a raster image from a text prompt using one of two local, headless, API-key-free backends. Both run under an existing logged-in account (no API key, no per-image API billing) exactly as if the user typed the prompt into that tool themselves:

• GPT — Codex CLI's imagegen tool, under the user's ChatGPT login.
• Gemini — Antigravity agy CLI headless, under the user's Google login.

The whole point of this skill is letting the user pick the model. Everything else (subject, style, aspect, palette, mood) flows straight from the prompt into the chosen backend.

The one decision that matters: which backend

Before generating, you must know which backend to use. There are exactly two cases:

1. The user already named a backend → use it, don't ask. Honor whatever they said and skip straight to generation. Map their words like this:

• GPT, OpenAI, ChatGPT, codex, "the gpt one", DALL·E (as a model family, not the API) → gpt
• Gemini, Google, agy, Antigravity, "nano banana", "the google one" → gemini

Asking again when they've already told you is annoying and wastes a turn — the user was explicit for a reason.

2. The user did NOT name a backend → ask, with no default. Use the AskUserQuestion tool with a single question and exactly two options, presented as equals (neither marked "recommended" — the user didn't express a preference, so don't manufacture one). For example:

AskUserQuestion(questions=[{
  "question": "Which model should generate this image?",
  "header": "Image model",
  "multiSelect": false,
  "options": [
    {"label": "GPT (codex)", "description": "OpenAI image model via Codex CLI, under your ChatGPT login."},
    {"label": "Gemini (agy)", "description": "Google image model via Antigravity CLI, under your Google login."}
  ]
}])

Read the answer, map it to gpt or gemini, and proceed. (If the user picks "Other" and types something, interpret it — e.g. "whatever's faster" → pick either and say which you used.)