Migration Guide: Claude Code to Google Antigravity

README.md

Migrating from Claude Code to Google Antigravity

This guide outlines how to migrate the current Claude Code + Muxile workflow to Google Antigravity (VS Code-based AI IDE).

1. Directory Structure

Create the configuration directory in your project root:

mkdir -p .antigravity/{config,scripts,prompts}

2. Configuration

Antigravity uses .antigravity/config.yaml instead of .claude/settings.json. See the attached config.yaml for the migrated configuration.

3. Scripts & Hooks

Move existing Bash scripts from .claude/hooks/ to .antigravity/scripts/.

cp .claude/hooks/go-build-check.sh .antigravity/scripts/
cp .claude/hooks/discord-notify.sh .antigravity/scripts/
cp .claude/hooks/protect-git-clean.sh .antigravity/scripts/

Updates Required

• Discord Notification: Ensure the JSON parsing in discord-notify.sh aligns with Antigravity's event payload.
• Permissions: Ensure scripts have execute permissions (chmod +x .antigravity/scripts/*.sh).

4. Skills (Prompts)

Move markdown skill files to .antigravity/prompts/.

• TDD: Save content of .claude/skills/tdd/SKILL.md to .antigravity/prompts/tdd.md.
• Review: Save content of .claude/skills/review-session/SKILL.md to .antigravity/prompts/review.md.

Usage: Invoke via @tdd or @review in the chat interface.

5. Remote Access (Replacing Muxile)

Replace tmux + Muxile with Antigravity Remote Tunnels (VS Code Tunnels) for a full IDE experience on mobile.

1. Open Command Palette (Cmd+Shift+P).
2. Run "Antigravity: Turn on Remote Tunnel Access...".
3. Authenticate with GitHub or Google.
4. Access via mobile browser at vscode.dev/tunnel/<machine_name>.

Benefits

• Full UI: Code editor, terminal, and agent chat on phone.
• Persistence: Session runs on host machine.
• Security: Authenticated access (no public ports/QR codes).

config.yaml

version: "1.0"
agent:
  name: "SkyDaddy Cloud Agent"
  
  # 1. Permissions (Mirrors .claude/settings.json)
  permissions:
    allow:
      - "bash:*"
      - "read_file:*"
      - "write_file:*"
      - "search:*"
    deny:
      - "bash:rm -rf /"
      - "write_file:.env*"
      - "read_file:**/secrets/**"

  # 2. Lifecycle Hooks (Mirrors .claude/hooks/)
  hooks:
    # Protect against 'git clean' and dangerous commands
    pre_tool_use:
      - command: "./.antigravity/scripts/protect-git-clean.sh"
        if: "tool.name == 'bash' && tool.input.command.contains('git clean')"

    # Run build checks after file edits
    post_tool_use:
      - command: "./.antigravity/scripts/go-build-check.sh"
        if: "tool.name in ['write_file', 'replace'] && tool.input.path.endsWith('.go')"
        timeout: 120

    # Discord Notifications
    on_session_start:
      - command: "./.antigravity/scripts/discord-notify.sh start"
    on_session_stop:
      - command: "./.antigravity/scripts/discord-notify.sh stop"
    on_user_input_request:
      - command: "./.antigravity/scripts/discord-notify.sh input_needed"