This project compiles a bounded bridge around TeaVM 0.15.0's java.util.regex.Pattern and Matcher class-library implementation to a minified ES2015 module.

The runtime is intentionally identified as TeaVM java.util.regex 0.15.0. TeaVM supplies its own Apache Harmony-derived Java class-library subset; the generated engine is not OpenJDK and must not be presented as exact OpenJDK semantics.

The U application flag is a compatibility request. TeaVM 0.15.0 does not implement OpenJDK's Pattern.UNICODE_CHARACTER_CLASS; the bridge implies Unicode case folding but retains TeaVM's predefined-character-class and word boundary behaviour. The TypeScript adapter reports this boundary.

Replacement is delegated to TeaVM 0.15.0's native Matcher implementation. That implementation recognizes only a single decimal digit after $ ($0 through $9, subject to the compiled group count). It does not implement OpenJDK's ${name} named-replacement syntax; the bridge returns a replacement-error when such a replacement is attempted.

Maven builds target/generated/java-regex.mjs. The repository pack script verifies the pinned source identity, bridge source hashes, licence/notice and generated module before it can be installed under public/engines/java.