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Claude Code is Anthropic's agentic AI coding tool for the terminal, IDEs, and GitHub. It uses natural-language commands to examine and understand codebases, create and read files, execute commands, run tests, explain code, manage Git workflows, and assist with routine development tasks. It can load persistent project context, run custom slash commands, use plugins with custom commands and agents, and operate with configurable autonomy while leaving actions such as final pull-request merging to a human. The official repository documents installation for macOS, Linux, and Windows, and identifies npm installation as deprecated.

Aether is a cloud platform for running coding agents in isolated development environments, including Claude Code, Codex, and OpenCode. Each task receives a separate Firecracker microVM that can be watched, steered, accessed over SSH, and used to verify code; the environment is destroyed after the pull request merges or closes, or after 48 hours of inactivity. Agents can work on repositories, open and review pull requests, stream terminal commands and diffs, capture screenshots and Playwright videos, and run in parallel as a fleet. Aether uses the model subscription or API account supplied by the user and charges for compute time rather than model usage. It also provides a REST API, a WebSocket API for live workspace events, and a CLI.

AgentLoop is a developer tool that runs unattended coding loops on a user's machine, executing plans authored in ChatGPT by launching Codex-based workers and independent critic processes. It automates iterative code generation and evaluation until configured quality standards are met.

Cursor is an AI-powered coding agent and integrated development environment designed to accelerate software development by handing off coding tasks to AI. It evolved from an email client into a multimodel development tool, supporting broader developer workflows. The platform also offers MCP-connected capabilities for tasks like searching and editing notes.

OpenAI Codex is an AI coding agent from OpenAI available as a command-line tool (Codex CLI) that helps developers produce software. It can be used alongside Gemini for adversarial audits of software requirements and implementation plans, listed as a supported coding-agent or model option in several projects, and its logs can be joined with task and test evidence. The Codex CLI can also receive and answer requests from the Penako canvas.