Coasts provides a local development runtime that runs multiple isolated environments on one machine. It supports git worktrees, Docker Compose stacks, and non-containerized setups without relying on a hosted cloud service. The project is open source, MIT licensed, and backed by Y Combinator F25.
Coasts offers a local development runtime designed to facilitate parallel development by running multiple isolated environments on a single machine. Key features of their offerings include:
Local Isolated Runtime: This allows developers to create and manage multiple environments without the need for a hosted cloud service, making it easier to work on different projects simultaneously.
Support for Git Worktrees: Coasts integrates seamlessly with git worktrees, enabling developers to manage multiple branches and versions of their code efficiently.
Docker Compose Stacks: The platform supports Docker Compose, allowing users to define and run multi-container Docker applications, which is essential for modern development workflows.
Non-Containerized Setups: Coasts also accommodates non-containerized setups, providing flexibility for developers who may not want to use containers for every project.
Open Source and MIT Licensed: Being open source encourages community contributions and transparency, while the MIT license allows for broad usage and modification.
Coast Daemon and Coastfile Workflow: The coast daemon manages the runtime environments, and the Coastfile workflow simplifies the configuration and management of these environments.
Target Audience: The primary users are developers utilizing git worktrees and teams focused on building agentic coding systems, which include tools like Cursor, Claude Code, and Codex.
The benefits of using Coasts include enhanced productivity through parallel development, reduced complexity in managing environments, and the ability to work offline without relying on cloud services.