A configuration language being rebuilt from scratch on the rewrite branch. The previous implementation lives on main; this branch starts over with a smaller, faster core. Expect the language surface to change while it stabilises.

Currently supports HCL-like fields and blocks:

name = "alpha"
count = 3
enabled = true

service "web" {
  port = 8080
  metadata {
    region = "us-east-1"
  }
}

• crates/wcl_lang — parser and AST library (wcl_lang::parse, wcl_lang::parse_file)
• crates/wcl — wcl CLI binary (wcl parse, wcl check)
• examples/ — sample input files

just workspace-build      # cargo build --workspace
just workspace-test       # cargo test --workspace
just workspace-lint       # clippy with -D warnings
just workspace-bench      # criterion benchmarks
just cli-run -- check examples/basic.wcl

Editor + install:

just cli-install          # cargo install --path crates/wcl --locked
just vscode-build         # npm install + tsc compile (editors/vscode)
just vscode-package       # produce a .vsix via @vscode/vsce
just vscode-install       # install the .vsix into VS Code via `code --install-extension`

Run just --list to see every recipe grouped by purpose.

WCL is licensed under the MIT License. Copyright (c) 2026 Wil Taylor.