Skip to content
SPECIFICTION
Get listed

Coasts

coasts.dev

Free plan macOSLinuxSelf-hosted

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

Every Coasts plan and price →

Where Specifiction places it

Alternatives to CoastsAll alternatives →