---
description: Kotlin 2.0+ engineering and coding standards
globs: *
alwaysApply: true
---

Always adhere to `CODING.md` and `docs/CODING_KOTLIN.md`:
- No explanatory comments.
- Target Kotlin 2.0+ K2 compiler with warnings as errors.
- Zero `!!` force unwraps; Elvis operator and smart casting.
- `val` and read-only collections by default.
- Sealed interfaces for domain types and exhaustive when expressions.
- Structured concurrency (managed CoroutineScope, no GlobalScope).
- File <= 400 lines, Class <= 150 lines, Function <= 50 lines.