Unofficial ChatGPT/Codex Flatpak
I was looking for a ChatGPT Flatpak so I could run Codex safely alongside my local dev environment, couldn't find anyone maintaining one, so I built my own.
No OpenAI binaries are redistributed: the payload is an extra-data source, so installs fetch their .deb straight from OpenAI against a pinned sha256, for x86_64 and aarch64. Electron renderers run under zypak instead of --no-sandbox. The remote is GPG signed, and the release gate in CI does a real flatpak install from the published URL with verification on.
Updates are hands-off: a nightly job reads upstream's APT index and re-pins the manifest when a new version appears, so you get the latest even when it lands at 3am my time (I'm an Aussie, timezones are rough).
The sandbox starts sealed and you grant directories with overrides. Main known issue: the app's transparent overlay window (the desktop pet) doesn't composite on Wayland, which upstream has acknowledged as part of their Wayland support still maturing.
flatpak remote-add --user chatgpt https://rulin132.github.io/chatgpt-flatpak/chatgpt.flatpakrepo
flatpak install --user chatgpt io.github.rulin132.ChatGPT
Source: https://github.com/rulin132/chatgpt-flatpak
I'm maintaining it for my own use either way, and if OpenAI ever ships an official Flatpak I'll point people at theirs and wind this down. Bug reports and PRs welcome.