From Feature Branches to Agent Branches ft. Antigravity

Git worktrees are an underrated feature that AI coding tool Antigravity (Google) elevates into a first-class workflow concept called 'agent branches'. Each task or feature gets its own isolated worktree with a dedicated branch, checkout, and filesystem directory — enabling concurrent agent execution without stashing or context-switching friction. The worktrees are stored under a `.gemini` namespace and can be listed with `git worktree list`. This approach makes parallel development streams cleaner and safer to manage.