Observed arrival · 2026-09-26

krusty, a Kotlin compiler in Rust

krustythecompiler.dev Visit website

Editorial interest 80/100 Selection signal · not a rating of the site

A native compiler that aims to match kotlinc’s command-line behavior and class-file output for the Kotlin subset it supports.

Landing page captured for the 2026-09-26 issue.

For: Kotlin/JVM teams using command-line or Bazel builds
Worth noticing: It needs no JVM to run, but still reads the class library of an installed JDK.

Field notes

The examples show source paths compiled directly to a class directory or JAR, with options for a dependency classpath and module name. The page says the compiler runs without a JVM but still reads an installed JDK’s class library. Its stated current scope includes kotlinx.serialization, KSP, Bazel persistent workers, and a language server with a Zed extension.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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