antigravity support

antigravity.md

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+## Connecting Antigravity to Codespaces
+
+We will use [Google Antigravity](https://antigravity.google/) as the AI assistant and Codepaces as the environment.
+
+In this section I will show how to connect Antigravity to Codespaces.
+
+Step 1: Install GitHub CLI
+- Download from https://github.com/cli/cli/releases
+- Windows installation steps
+    - open powershell and install [winget](https://learn.microsoft.com/en-us/windows/package-manager/winget/) 
+```
+winget install --id GitHub.cli
+choco install gh
+```
+
+Step 2: Authenticate
+
+```
+# Authenticate with Github using ssh
+gh auth login
+# select: SSH protcol and your existing SSH key for Github
+# Follow the remaining prompts
+
+# authenticate for codespaces
+gh auth refresh -h github.com -s codespace
+```
+
+Step 3: Create and Use Codespace
+```
+gh codespace create
+# Note the ID that's generated (e.g., glorious-space-chainsaw-rpxj65wq969fp5wq)
+```
+
+Step 4: Connect via SSH
+```
+gh codespace ssh -c glorious-space-chainsaw-rpxj65wq969fp5wq
+```
+Next, get the SSH config:
+```
+gh codespace ssh --config -c glorious-space-chainsaw-rpxj65wq969fp5wq
+```
+
+add the output to ~/.ssh/config
+
+Step 5: Use with Antigravity
+- Connect to codespace using Antigravity's SSH remote node
+- Open the project folder in /workspaces/
+
+Step 6: Stop Codespaces when done
+```
+gh cs stop -c glorious-space-chainsaw-rpxj65wq969fp5wq
+```