Plugin

karellen-jdb-mcp

JDB (Java Debugger) plugin for Claude Code. Attach to running JVMs via JDWP and debug interactively with breakpoints, watchpoints, exception breakpoints, stepping, expression evaluation, thread inspection, stack navigation, and class introspection. ### Features - **Connect & Launch**: Attach to any JVM started with JDWP, or launch one directly with `jdb_launch` - **Multi-session**: Debug multiple JVMs simultaneously on different ports - **Breakpoints & Watchpoints**: Line/method breakpoints, field watchpoints, exception breakpoints with caught/uncaught filtering - **Execution Control**: Step in, step over, step out, continue, suspend/resume threads - **Inspection**: Evaluate expressions, dump objects, view locals, list loaded classes/methods/fields - **Stack Navigation**: Walk the call stack, move up/down frames, pop/re-enter frames - **Concurrency**: Thread listing, lock/monitor inspection for deadlock analysis - **Tracing & Monitoring**: Trace method entries/exits, auto-execute commands on each stop - **JDK Compatibility**: Supports JDK 8+ with feature detection (virtual threads on JDK 20+, thread-scoped breakpoints on JDK 13+) ### Prerequisites - Python 3.10+ - A JDK installation (for the `jdb` executable) ### Installation pip install karellen-jdb-mcp

• Published source
• Repository

Analysed

11 October 2026

Last observed

12 October 2026

What the code does

• Runs shell commands Code that starts system commands on the machine it runs on.
• Runs hooks automatically Hooks that execute without being called explicitly.

Having a capability is not wrongdoing; many tools need these to do their job. It tells you what to check before you install.

This is public metadata, not a safety certification or complete assessment. Static analysis cannot establish what a tool does at runtime.