feat: add antigravity-selkies image (Google AI-agent IDE)#28
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Google Antigravity is an AI-agent-first IDE — a VS Code fork with deep Gemini integration, released by Google in November 2025. Distribution: Google Cloud Artifact Registry apt repo. New install pattern for our catalog (we've covered apt-from-vendor — Mozilla, Slack, Signal, Element, Brave, Vivaldi, LibreWolf — but not the GCP-Artifact-Registry-as-apt-repo flavor): curl -fsSL https://us-central1-apt.pkg.dev/doc/repo-signing-key.gpg | gpg --dearmor -o /etc/apt/keyrings/antigravity-repo-key.gpg deb [signed-by=...] https://us-central1-apt.pkg.dev/projects/ antigravity-auto-updater-dev/ antigravity-debian main apt install antigravity The "antigravity-debian" suite name works on Ubuntu noble too — same non-Ubuntu-codename-specific pattern we've seen with Slack ("jessie"), Signal ("xenial"), Element ("default"), and LibreWolf ("librewolf"). Electron-based (since it's a VS Code fork) — needs --no-sandbox in unprivileged containers. Memory 4 GiB request / 8 GiB limit since AI IDEs run heavier than plain editors (LLM-backed agent workflows can spike memory usage). NEW addition to the catalog — no legacy template existed (Antigravity is 2 months old). Local rebuild + verify skipped (Docker disk constraint). Repo + key + package all probed live before writing: key URL: HTTP 200 /dists/antigravity-debian/Release: HTTP 200 Package: antigravity confirmed in main/binary-amd64/Packages
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Summary
Google Antigravity is an AI-agent-first IDE (VS Code fork with Gemini integration), released by Google in November 2025.
Install path: GCP Artifact Registry as apt repo
New install pattern for our catalog. Google distributes Antigravity via Google Cloud Artifact Registry's apt-repo feature — different from Chrome's `dl.google.com/linux` pattern:
```
curl -fsSL https://us-central1-apt.pkg.dev/doc/repo-signing-key.gpg
| gpg --dearmor -o /etc/apt/keyrings/antigravity-repo-key.gpg
deb [signed-by=...] https://us-central1-apt.pkg.dev/projects/antigravity-auto-updater-dev/ antigravity-debian main
apt install antigravity
```
The "antigravity-debian" suite name works on Ubuntu noble too — same non-Ubuntu-codename-specific pattern we've seen with Slack ("jessie"), Signal ("xenial"), Element ("default"), and LibreWolf ("librewolf").
Resource sizing
Mem 4 GiB request / 8 GiB limit. AI IDEs run heavier than plain editors — LLM-backed agent workflows can spike memory usage when running long-running agent loops.
Electron flag
Same `--no-sandbox` pattern as the other Electron apps (chrome, vscodium, dbeaver, github-desktop, joplin, ...).
Local verification skipped (Docker disk)
Apt repo + key + package all probed live before writing:
Test plan
Catalog progress
After this lands: 50 published Selkies-native images (50!). Development category becomes 10 (vscodium, dbeaver, godot, openscad, xournalpp, mysql-workbench, sqlitebrowser, github-desktop, yaak, antigravity).