A look at the last few Java releases and feedback loops for agents. A solid week.

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Weekly roundup of Java ecosystem news covering Java 26 evolution from JDK 21 through 26, caching strategies for agentic Java systems, a Thymeleaf template injection CVE, OpenTelemetry getting started, Kotlin productivity data, JDK 27 previews including Lazy Constants and post-quantum TLS, JVM crash analysis with jcmd, and MockK setup. Releases include GlassFish 8.0.2, IntelliJ IDEA 2026.1.2, Compose Multiplatform 1.11.0, multiple Quarkus versions, and Zuul updates. The technical section highlights maintainability sensors for AI coding agents and Netflix's Cassandra data movement evolution.

Java Weekly, Issue 647