Kotlin Creator Andrey Breslav Launches CodeSpeak for Plain-English Specs

Andrey Breslav, creator of Kotlin (lead designer at JetBrains from 2010 to 2020) and founder of CodeSpeak, is building a tool that replaces trivial boilerplate code with concise plain-English markdown descriptions. LLMs generate the implementation code from these specs, letting teams maintain specs rather than code. CodeSpeak targets engineers, aims for roughly 10x code reduction on boilerplate, and is currently in alpha (install via uv tool install codespeak-cli). Published case studies on four open-source Python projects show shrink factors of 5.9x to 9.9x. The developer community characterizes CodeSpeak as a workflow and tooling layer rather than a formal language or DSL. Correction (2026-04-21): An earlier version of this article misattributed CodeSpeak to Dmitry Jemerov, described it as a domain-specific language, and said it produces formal specifications. CodeSpeak is led by Andrey Breslav (creator of Kotlin); it uses plain-English markdown specs, is not a DSL, and does not claim to produce formal specifications. Our apologies to Andrey and to readers for the errors.