VS Code extension

The local preview extension provides .spr highlighting, saved-file diagnostics, Sprig: Check, Run, Build, Show Generated Java and diagnostic explanations. It uses the existing Sprig CLI; it does not implement a second type system.

Installation

Build sprig-language-0.1.0.vsix in the repository's editors/vscode/ directory:

npm ci
npm run package

In VS Code, use Extensions → Install from VSIX…. This preview is not on Marketplace and is not bundled with the Beta SDK ZIP.

Highlighting works without a compiler. For checks and execution, install the SDK and JDK17+, then set sprig.compilerPath to the SDK's bin/sprig. A built source checkout is also detected through ancestor bin/ directories after PATH lookup.

Use

Save a .spr file and select Sprig: Check from the Command Palette. Errors appear in Problems with file/range/code and expected/actual types. Saving checks by default. Projects check the entry graph and current file; missing or stale dependency locks require an explicit CLI resolve.

Sprig: Run compiles and runs the active saved file. Output appears when the program finishes. Runs are non-interactive, bounded by 120 seconds and 8 MB by default. Show Generated Java opens emitted Java beside Sprig without javac.

Syntax highlighting remains available in Restricted Mode; compiler commands require workspace trust. Linux/macOS are supported targets; Windows is preview. The extension runs on the workspace host in Remote SSH/containers and needs a compiler there. Browser-only VS Code and virtual filesystems are unsupported.

Full configuration, testing and limitations.