Antigravity

Google's Antigravity is a Code-OSS-based agent IDE. The CodeAtlas VSIX installs the same way as in VS Code, and the bundled MCP server is reachable from Antigravity's agent runtime.

Install

Antigravity uses Open VSX as its extension registry. CodeAtlas is published as codeatlaslive.codeatlas-live.

Option A — search Open VSX from inside Antigravity

  1. Open the Extensions view (⌘ ⇧ X).
  2. Search for CodeAtlas-Live and click Install.
  3. Open your workspace; visit http://localhost:7742.

Option B — sideload the VSIX

  1. Download the VSIX from open-vsx.org/extension/codeatlaslive/codeatlas-live — click Download.
  2. Drag the .vsix into the Antigravity window — or use ⌘ ⇧ P → Extensions: Install from VSIX….
  3. Quit and relaunch Antigravity.

Wire CodeAtlas into Antigravity agents

Antigravity agents can use MCP servers declared in ~/Library/Application Support/Antigravity/mcp.json (macOS) or the equivalent path on Linux/Windows.

Antigravity MCP config — use the bundled binaryjson
{
  "mcpServers": {
    "codeatlas": {
      "command": "node",
      "args": [
        "/Users/you/.antigravity/extensions/codeatlaslive.codeatlas-live-5.0.0/dist/mcp-server.js",
        "/absolute/path/to/your/workspace"
      ]
    }
  }
}
npm route works too
If you don't want the agent config to track VSIX version bumps, swap the bundle path for the published package:
json
"codeatlas": {
  "command": "npx",
  "args": ["-y", "@codeatlas/mcp", "/absolute/path/to/your/workspace"]
}

What this unlocks

  • Architecture-aware planning. When an Antigravity agent plans a multi-file edit, it can call get_impact_of_change(file) to see the blast radius before touching anything.
  • Coverage-aware routing. If you generate LCOV in CI,get_coverage_overlay lets the agent prefer routes that already have test coverage to seed regressions from.
  • SQL inspection. query_snapshot("SELECT name FROM functions WHERE file LIKE '%/auth/%'") — works without any LLM round-trip; deterministic, guardrailed SELECT-only access.

Concurrency note

If you run the extension in Antigravity and the standalone MCP server pointing at the same checkout, the MCP server takes the write-lock and the extension drops to read-only — same protocol as in VS Code / Cursor / Windsurf. See the extension overview for the lock semantics.

Troubleshooting

Agent reports "MCP server not found"

Antigravity may launch agents in a process that doesn't inherit your shell PATH. Ifnode isn't resolvable, replace the command value with the absolute path printed by which node.

Diagrams stop updating after a long session

Inspect .codeatlas/.mcp-owner. If a stale PID is recorded (process no longer exists), delete the file and reload — both the extension and any running MCP server will reacquire cleanly.