# not hotdog

[Install the OpenAI plugin](https://chatgpt.com/plugins/plugins_6aa62d11f8308191af4d7ab1aba34ec3) · [Website](https://not-hotdog.alx21.chatgpt.site)

Two ways to ask a very small question: hotdog or not hotdog?

The website is version 0.3.1, with a playful snack counter design, original mascot, locally served fonts, responsive image boards, and keyboard accessible controls. The browser companion is version 0.2.4 and the published OpenAI chat plugin remains version 0.2.2.

The OpenAI plugin uses the host assistant's existing image capabilities for an image shared in ChatGPT or Codex. The companion website and Chrome or Edge extension run MobileNet on the visitor's device. The extension adds opt in hover detection on regular webpages.

Neither workflow calls a publisher funded API. No API key is required. Normal ChatGPT or Codex plan limits still apply to the chat workflow. Browser checks use the visitor's device and local model files.

Publisher and support: [agammann](https://github.com/agammann). [Report an issue](https://github.com/agammann/not-hotdog/issues).

## Run and build

Use Node.js 24 and pnpm 11.19.0:

```sh
pnpm install --frozen-lockfile
pnpm build
pnpm test
pnpm dev
```

Open http://127.0.0.1:4317. Enable hover and point at a sample, click it, or choose a local image. Escape pauses checks. Clear results removes page verdicts.

The build downloads the TensorFlow MobileNet V1 1.0 ImageNet model from its official storage source and verifies every file against MODEL.lock.json. The bundled weights total 17,015,456 bytes (about 17 MB). They are bundled into the extension and served as static files by the website. There is no remote inference service or API fallback.

The original API endpoints return HTTP 410. Source contains no OpenAI API client. Earlier commits describe the superseded API prototype; they are not the current implementation.

## Install the browser companion

After building, extract `public/not-hotdog-extension.zip`. Open Chrome or Edge Extensions, enable Developer mode, choose Load unpacked, and select the extracted directory containing manifest.json. Open a regular webpage, click the extension icon, and enable it for that tab. Navigation resets activation; Escape pauses it.

The extension bundles JavaScript and model weights and has no external host permissions. It handles visible top level HTML images. If direct canvas access is blocked, it locally crops an active tab capture to the hovered image. The full screenshot is never uploaded or returned to page scripts. CSS backgrounds, frames, video, browser settings pages, and offscreen images are outside this preview. Overlays can affect the crop.

The image model works best with clear photographs. Completed checks return HOTDOG when the hotdog class has a strong lead and NOT HOTDOG otherwise. Loading and decoding failures remain errors rather than image verdicts. Model rankings are not calibrated probabilities of correctness. Drawings and unusual presentations may be unreliable. This is entertainment, not a food safety or allergy tool.

## OpenAI plugin

Package `.codex-plugin`, `skills`, and `assets` as a ZIP. Submit using Skills only in the OpenAI plugin portal. The skill uses the host assistant to inspect a selected image. It has no MCP server or credentials. Installing it does not install the browser companion. Draft test cases and metadata are in chatgpt-app-submission.json.

See RELEASE_STATUS.md for actual deployment and submission status. Public GitHub source does not imply OpenAI approval or a browser store listing.

## Hosting and data

The Worker serves only static application assets. It never reads or writes a database or requests inference. The hosting manifest contains the owning Sites project identifier in the deployment checkout and a generic template in the public repository. Configure your own project when deploying.

Website and extension images stay on device. Chat images are handled by the host assistant under its normal policies. Hosting still processes ordinary file requests and network metadata. See public/privacy.html and public/terms.html.

## Rights and credits

Application source has no open source license grant. TensorFlow.js and MobileNet model files retain their Apache 2.0 terms. Bundled notices are included in the extension. Other dependencies retain their own licenses. Photo credits are in public/credits.html.