When neither .devcontainer/devcontainer.json nor .devcontainer.json
exists, scan .devcontainer/ for subdirectories containing a
devcontainer.json. Subdirectories are sorted alphabetically and the
first match is used. Standard locations still take priority.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Stop baking remoteEnv into Dockerfile (only containerEnv belongs as ENV)
- Merge forwardPorts with compose ports in compose mode (with dedup)
- Support build.target (parsed with variable substitution)
- Handle forwardPorts string formats like "8080:80" and "9090"
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add onCreateCommand lifecycle hook (parsed, resolved, exposed as on_create_commands)
- Expose build.args on DevcontainerConfig for docker build --build-arg
- Wire containerEnv into generated Dockerfile as ENV directives (remoteEnv overrides on collision)
- Support dockerComposeFile as array of paths with merge semantics (last wins for image/build/user, ports accumulate, env overrides)
- Update DEVCONTAINER-COMPATIBILITY.md and INTEGRATION.md docs
- Add e2e tests with realistic Python and compose project fixtures
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Standalone crate that reads devcontainer.json (with JSONC support), fetches
OCI Features via oras, and produces a resolved config containing a generated
Dockerfile, lifecycle hooks, environment variables, and forwarded ports.
Supports image, Dockerfile, and Docker Compose modes with devcontainer
variable substitution. No coupling to arc-workflows or DaytonaSandbox.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
