hermes - 💡(How to fix) Fix [Feature]: Add Antigravity toolset / skill

Problem or Use Case

I often work with agent‑orchestration tools and would like to use Google’s Antigravity CLI/SDK directly from within a Hermes session, just as I can with Claude Code, Codex, or OpenCode.

Proposed Solution

Add an antigravity toolset (and optionally an antigravity‑agent skill) that lets Hermes users run Antigravity commands via the existing tool‑calling mechanism, expose a slashcommand (/antigravity <prompt>), and provide documentation/examples.

Alternatives Considered

• Manually call terminal({command: "antigravity …"}) each time – works but lacks discoverability, auto‑completion, and a structured way to bundle workflows into a skill.
• Use a separate terminal session – loses Hermes’ persistent memory, skill curation, and multi‑gateway benefits.

Additional context

• Antigravity homepage: Google Antigravity
• The CLI is a single binary; the SDK is a Python package installable via pip.
• Hermes already has patterns for wrapping CLIs (see claude‑code, codex, opencode toolsets).

Feature Type

New bundled skill

Scope

Medium (few files, < 300 lines)