Antigravity CLIvsCline

The headless terminal-first autonomous coding agent and interactive TUI for fast keyboard-driven engineering and subagent orchestration.

Antigravity CLI (agy) is Google's terminal-native autonomous coding agent built for developers who thrive in keyboard-driven, shell-centric workflows. Designed to run seamlessly in local terminals, tmux sessions, and remote SSH environments, the CLI strips away graphical overhead to deliver lightning-fast agent interaction and deep Unix pipeline integration.

Autonomous open-source VS Code extension that edits code, runs terminal commands, and creates files with user approval.

Cline (formerly Claude Dev) is an open-source autonomous agent for VS Code that reads codebases, writes files, runs shell commands, and iterates on errors with your permission. Engineered to streamline complex operational demands, the platform couples targeted domain models with modern user interfaces to reduce repetitive overhead and enforce consistent results.

• Concurrent Subagent Delegation: Spawns specialized background agents to tackle complex programming tasks in parallel. Subagents operate in isolated branched workspaces to run unit tests, audit code security, or perform deep documentation lookups. The primary agent receives structured updates reactively without locking the terminal session.
• Terminal Sandboxing & Granular Permissions: Delivers fine-grained execution policies ranging from strict user review to autonomous sandbox execution. Developers can configure precise command allowlists, file access boundaries, and network permissions. The safety boundary prevents accidental regressions or destructive shell commands during automated cycles.
• First-Class AGY Customization Ecosystem: Loads custom skills, operational rules, lifecycle hooks, and sidecar processes directly from the user or project directory. It natively speaks the Model Context Protocol (MCP) to interface with external developer tools and APIs. Workflows can be automated using declarative slash commands like /plan, /goal, and /schedule.
• Reactive Messaging & Task Scheduling: Built on an asynchronous event architecture that eliminates CPU-wasting polling loops. The CLI includes a native cron scheduler and one-shot timers to execute recurring background tasks and alerts. It functions both as an interactive pair programmer and a 24/7 background development daemon.

• Human-in-the-loop Safety: Prompts for permission before executing terminal commands. Engineered for high throughput, it integrates into daily AI coding & development workflows with low operational overhead. Users benefit from consistent output accuracy and automated error-handling under demanding workloads.
• Connects to Any: LLM via Anthropic API, OpenRouter, or local Ollama models. Engineered for high throughput, it integrates into daily AI coding & development workflows with low operational overhead. Users benefit from consistent output accuracy and automated error-handling under demanding workloads.
• Autonomous Test Execution: And debugging loop. Engineered for high throughput, it integrates into daily AI coding & development workflows with low operational overhead. Users benefit from consistent output accuracy and automated error-handling under demanding workloads.

• Blazing-fast terminal execution ideal for remote SSH, tmux, and Vim/Neovim power users
• Native subagent spawning with branched workspaces enables true parallel multitasking
• Comprehensive customization via AGY skills, rules, hooks, and Model Context Protocol (MCP)

• Completely free and open-source with no platform markup
• You choose which LLM powers it (Claude 3.5 Sonnet, DeepSeek-R1)
• Strict safety approval controls

• Requires familiarity with shell environments and command-line workflows

• Requires bringing your own API keys