WA2 — CloudFormation Fast Linting & Cross-Stack Foundations (Preview)
The WA2 VS Code extension provides an ultra-fast, workspace-aware CloudFormation validator powered by a Rust language server (wa2lsp).
It performs real-time checks as you type — catching structural problems long before deployment.
This early preview focuses on the fast-path engine: instant YAML/JSON parsing and foundational template checks.
✨ Features (Preview)
Real-time diagnostics for CloudFormation-style YAML & JSON
Ultra-fast Rust LSP (written in Rust, non-blocking design)
Background validation with strict time budgeting
Parse error detection for YAML/JSON
CloudFormation structural checks, including:
Missing top-level Resources section
More checks will roll out as the underlying engine develops.
🚀 Getting Started
1. Install the WA2 language server (wa2lsp)
You need Rust installed (rustup), then install the LSP from this repository:
git clone https://github.com/unremarkable-technology/wa2-vscode-extension
cd wa2-vscode-extension
cargo install --path server/wa2lsp
2. Install the WA2 VS Code extension
If you have a packaged .vsix, install it via:
VS Code → Extensions → … → Install from VSIX
