Coasts
coasts.dev
Spec sheet
- Purpose
- Coasts runs multiple isolated local development environments for the same project on one machine.Read 10 Oct 2026 · coasts.dev
- Support
- The site links to a Discord community and a contact page.Read 9 Oct 2026 · coasts.dev
- License
- The project is MIT-licensed and described as free and open source.Read 10 Oct 2026 · coasts.dev
- Maker
- The site copyright identifies Stanton Street Inc.Read 9 Oct 2026 · coasts.dev
- Harness compatibility
- The docs list support guidance for Codex, Claude Code, Cursor, Conductor, T3 Code, and Shep.Read 10 Oct 2026 · coasts.dev
- Harnesses
- The documentation lists Codex, Claude Code, Cursor, Conductor, T3 Code and Shep as supported harnesses.Read 9 Oct 2026 · coasts.dev
- License and cost
- The project describes itself as free, local and MIT-licensed, with no AI upsells.Read 9 Oct 2026 · coasts.dev
- Linux limitation
- On Linux, canonical ports below 1024 may require host configuration before checkout can bind them.Read 10 Oct 2026 · coasts.dev
- Offline use
- The project describes itself as offline-first with no hosted service dependency.Read 10 Oct 2026 · github.com
- Parallel runtimes
- Each Coast has its own ports, network, and services, with configurable resource sharing.Read 10 Oct 2026 · coasts.dev
- Platform limitation
- Canonical ports below 1024 on Linux require additional host configuration.Read 9 Oct 2026 · coasts.dev
- Port mapping
- Each running Coast receives dynamic ports, while only the checked-out Coast uses the project's canonical ports.Read 10 Oct 2026 · coasts.dev
- Remote hardware
- Remote Coasts run services on remote machines through SSH and can be combined with local Coasts in a hybrid setup.Read 10 Oct 2026 · coasts.dev
- Remote runtimes
- Remote Coasts can run on machines reachable over SSH, allowing local and remote runtimes in a hybrid setup.Read 9 Oct 2026 · coasts.dev
- Requirements
- The documented requirements are macOS or Linux, Docker, Git, Node.js, and socat.Read 10 Oct 2026 · coasts.dev
- Runtime support
- Coasts supports Docker Compose stacks and non-containerized local development setups.Read 10 Oct 2026 · coasts.dev
- Secrets
- Coasts can extract secrets from the host environment and inject them into Coast containers so credentials do not need to be hardcoded in a Coastfile.Read 10 Oct 2026 · coasts.dev
- Security and hosting
- The project says it is offline-first with no hosted service dependency.Read 9 Oct 2026 · github.com
- Stack support
- Coasts supports Docker Compose projects and non-containerized local development setups.Read 9 Oct 2026 · coasts.dev
- Team support
- The maker offers setup, onboarding, and ongoing infrastructure help for teams through its contact page.Read 10 Oct 2026 · coasts.dev
- Volume strategies
- Coasts provides shared services, shared volumes, and per-instance data isolation strategies for services such as databases and caches.Read 10 Oct 2026 · coasts.dev
- Workflows
- Coasts works with agentic coding workflows that use Git worktrees and says no special harness-side configuration is required.Read 9 Oct 2026 · coasts.dev
- Worktree runtimes
- Each environment can have its own ports, network and services, with options to share resources across environments.Read 9 Oct 2026 · coasts.dev
- Worktree workflow
- Coasts works with agentic coding workflows that use Git worktrees and requires no special harness-side configuration.Read 10 Oct 2026 · coasts.dev
Plans and prices
Coasts Free Free, local, open source; no usage limits stated Read 10 Oct 2026 · coasts.dev
Custom team services Priced on request Custom local configurations · cloud deployments · infrastructure support Read 10 Oct 2026 · coasts.dev
Where Specifiction places it
- Container Development Environments#2 of 408.9