kotlinconf-sdd

Interview the user one question at a time, walking the decision tree, to clarify a feature proposal before implementation

Stress-test the spec pipeline outputs against each other and the codebase before implementation begins

Authoritative guidance on modern Kotlin language features (2.2.0 through 2.3.21) — writing idiomatic code, reviewing or modernizing older code, and upgrading across the 2.2 → 2.3 line. Make sure to use this skill whenever the user mentions Kotlin 2.2, 2.2.20, 2.3, 2.3.0, 2.3.20, or 2.3.21, or any of these features: guard conditions in `when`, non-local `break`/`continue` in inline lambdas, multi-dollar string interpolation, context parameters, context-sensitive resolution, nested type aliases, the `@all` annotation use-site target, unused return value checker, explicit backing fields, name-based destructuring, data-flow exhaustiveness for `when`, or `return` in expression-body functions. Also trigger for compiler flags `-Xreturn-value-checker`, `-Xexplicit-backing-fields`, `-Xname-based-destructuring`; annotations `@MustUseReturnValues` and `@IgnorableReturnValue`; or any question framed as "what's new in Kotlin" or "latest Kotlin features."