Antigravity CLI Migration Guide: Transitioning to Gemini Skills

Antigravity CLI served the developer community well, but with its official deprecation announcement, teams need a clear path forward. Gemini CLI offers feature parity and significant improvements in extensibility, but migration requires understanding the conceptual differences between the two platforms. This guide provides a systematic approach to transitioning your workflows.

The fundamental shift is from Antigravity's command-based model to Gemini's skill-based architecture. Where Antigravity used discrete commands with fixed parameters, Gemini skills operate as contextual agents that adapt their behavior based on project state. For example, Antigravity's generate-tests command becomes a testing skill that understands your framework, existing test patterns, and coverage gaps. Map each Antigravity command you use to its Gemini skill equivalent, noting where skills offer additional capabilities you can adopt incrementally.

Configuration migration is largely straightforward. Antigravity's .antigravity.yml configuration maps to Gemini's GEMINI.md project configuration file. Most settings have direct equivalents, though Gemini's configuration supports richer context like project conventions, team preferences, and integration points. Custom Antigravity plugins require more effort to migrate since they need to be reimplemented as SKILL.md definitions, but the declarative format typically results in simpler, more maintainable implementations.

For teams running migration at scale, we recommend a phased approach. Start by running both tools in parallel for two weeks, comparing outputs on real tasks. Identify any Antigravity-specific workflows that lack direct Gemini equivalents and create custom skills to fill those gaps. Once confidence is established, sunset Antigravity CLI access gradually. Most teams report full migration within four to six weeks, with measurable productivity improvements by the end of the second month.