---
title: "Devcontainers"
description: "Using repository devcontainer metadata with Fabro environments"
---

Named environments are the supported configuration surface for run execution. Define reusable environments under `[environments.<slug>]` and select one with `[run.environment] id = "..."`.

Devcontainer-specific run configuration (`[run.sandbox] devcontainer = true`) has been removed with the named environments configuration break. To use a devcontainer-style image today, build or reference it through an environment image:

```toml
[run.environment]
id = "dev"

[environments.dev]
provider = "docker"

[environments.dev.image]
ref = "ghcr.io/acme/project-devcontainer:latest"
```

For Daytona snapshot creation, provide a Dockerfile path on the selected environment:

```toml
[run.environment]
id = "cloud-dev"

[environments.cloud-dev]
provider = "daytona"

[environments.cloud-dev.image]
ref = "project-dev"
dockerfile = { path = ".devcontainer/Dockerfile" }
```