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ChillingWombat edited this page Oct 11, 2026 · 1 revision

Extensions

Features / Extensions

The Extensions subsystem manages modular auxiliary tools embedded into Antigravity's interface. These tools provide in-context previewing, file tree exploration, developer scratchpads, and mobile layout simulation without leaving the pair-programming session.

1. Extension Gadget Directory

Antigravity Swiss Knife includes five integrated extension gadgets:

Preview Browser

An embedded Chromium web view that renders local development servers in real time alongside active chat conversations:

  • Default Port: Targets http://localhost:8765 or configurable local dev server URLs (Vite, Next.js, Django, Flask).
  • Console & Network Sync: Bridges frontend errors back to the agent session for automated debugging.
  • Auto-Reload: Triggers frame refreshes when files in the workspace change.

File Explorer

A lightweight filesystem browser integrated into the auxiliary inspection rail:

  • Project Scope: Confines file trees to the active repository root.
  • External IDE Launcher: One-click opening of files in the developer's preferred editor (presets for VS Code, Cursor, Windsurf, VSCodium, and Zed, plus custom binary command line overrides).

Quick Memos

A persistent scratchpad for storing notes, operational commands, and context snippets:

  • Markdown Support: Syntax highlighting for code blocks and task lists.
  • Storage Scope: Toggleable between global scope (shared across all projects) and project-specific scope.
  • Search Engine: Full-text keyword search indexing all stored memos.

Mobile Simulator

A responsive device frame for testing web applications across standardized mobile viewports:

  • Supported Profiles: iPhone 16 (393x852 px), Google Pixel 9 (412x924 px), and iPad Air (820x1180 px).
  • Device Chrome & Bezels: Optional toggle to display hardware bezel styling or clean viewport boundaries.
  • Orientation Control: One-click rotation between portrait and landscape modes.

GitHub Workspace Gadget

Compact auxiliary rail presentation of the full-screen GitHub Workspace, allowing developers to inspect pull requests and subagent assignments directly beside chat messages.

2. Visibility Matrix & Surface Placement

Developers can customize where each extension appears via the Extension Visibility Switches:

  • Auxiliary Panel (aux_panel): Enables the gadget in the collapsible right-hand rail of Antigravity's window.
  • Main Stage (main_page): Renders the tool as an expansive primary workspace tab on the central stage.

3. Persistence & Configuration Architecture

Extension states, default URLs, preferred editor binaries, and scratchpad contents persist through pkg/enhancements in the daemon's local SQLite store. All changes apply immediately without requiring full IDE restarts.

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