agent-of-empires (1.2K stars) provides a unified session management layer over tmux and git worktrees for running Claude Code, OpenCode, Codex CLI, Gemini CLI, Mistral Vibe, and Pi.dev agents concurrently. Each agent gets an isolated worktree and tmux pane; a central control surface allows switching between sessions. Addresses the ergonomic problem of manually coordinating multiple terminal-based agent sessions.