# schema.yaml database: host: string port: number(min=1024, max=65535) If a value is missing or invalid, you’ll get a clear error before your app starts — no more runtime surprises. We rewrote the internal merge engine in Rust (behind a Python binding) while keeping the API identical. Large configs with deep inheritance now load in half the time. For microservices and serverless environments, this means faster cold starts. 4. Environment Variable Interpolation You can now reference environment variables directly inside any config file:
db_host = config["database"]["production"]["host"] After (v1.3): magiccfg v1.3
3 minutes
api: key: ${API_KEY} url: "https://${ENV}.example.com" MagicCFG resolves these at load time, with clear warnings for missing variables. Python (PyPI): # schema
— The MagicCFG Team Tags: #release #magiccfg #v1.3 #devtools #configuration Python (PyPI): — The MagicCFG Team Tags: #release
April 18, 2026
go get github.com/magiccfg/magiccfg@v1.3