0.2.1

JAX4J 0.2.1 corrects the Java namespace to com.nablatensor.jax4j across every module, including generated JIT classes, service descriptors, examples and documentation. Update application imports when upgrading; this is a source and binary incompatible package migration. Maven coordinates remain com.nablatensor.

• All seven modules build with Java 25; ordinary and Vulkan/wgpu hardware test suites pass: 126 checks passed, 8 skipped, zero failures/errors. Vulkan passed 31 checks and wgpu passed 36.
• CUDA compiles, but execution could not be revalidated: no local CUDA driver and the previous validation host was unreachable. ROCm and SIMD execution also remain unverified.
• Sources and signed Javadoc artifacts are generated by the committed central-artifacts profile. Javadoc omits bundled fonts.
• Native GPU libraries are not bundled. Use --enable-native-access=ALL-UNNAMED; SIMD additionally requires --add-modules jdk.incubator.vector.
• Existing engine limitations are unchanged: CUDA scalar replay rejects multi-output tapes, uniform draws and named random streams.

Build from the tag with mvn -Pcuda,rocm,examples,simd clean verify. Applications normally depend on com.nablatensor:jax4j-core:0.2.1 plus the desired engine modules; the parent jax4j artifact is a POM. Examples are GitHub-only. SHA256SUMS covers all seven binary JARs.

Maven Central publication has been validated and submitted. Deployment 106d2fb4-948d-4fd5-8ade-a300144134cf currently reports PUBLISHING; public artifact availability is not confirmed. Central reported a monthly publishing quota warning. See the repository release status document for details.