How We Built a Java AI Agent by Connecting the Dots the Ecosystem Already Had

Wed, 25 Mar 2026 09:00:00 +0000

Everyone assumes you need Python to build AI agents. But the Java ecosystem already has every piece: Spring AI for LLM integration, Spring Events for decoupled messaging, JobRunr for reliable background jobs, and Spring Modulith for clean architecture. We didn’t build anything new. We connected the pieces that were already there.

The result is ClawRunr (everyone calls it JavaClaw, and we’ve stopped correcting them). An open-source AI agent runtime, written in pure Java. You can chat with it on Telegram or in the browser, ask it to summarize your emails every morning, schedule reminders, browse websites, run shell commands, connect external tools via MCP, and teach it new skills at runtime by dropping a Markdown file into a folder.

Carbon Aware Job Processing With JobRunr v8

Mon, 07 Jul 2025 09:00:09 +0000

As we produce, mutate, configure, and consume more and more data in various shapes and forms, think: video on demand, AI ingestion and generation of content, Internet of Things always-on connectivity, and more.

The energy consumption of our digital lives have gone up dramatically as well. We rarely notice this, and although multiple organisations put out alarming reports on energy use of data centres, policy makers seem reluctant to act fast.

Nicholas D'hondt on foojay.io - Friends of OpenJDK

How We Built a Java AI Agent by Connecting the Dots the Ecosystem Already Had

Carbon Aware Job Processing With JobRunr v8