Plugin Claude Code
JDB (Java Debugger) for Claude Code via MCP - attach to running JVMs and debug with breakpoints, expression evaluation, thread inspection, and class introspection.
Plugin Claude Code
JDB (Java Debugger) for Claude Code via MCP - attach to running JVMs and debug with breakpoints, expression evaluation, thread inspection, and class introspection.
MCP server Claude CodeCodexCursor +2
MCP server "karellen-jdb-mcp" as configured in karellen/karellen-jdb-mcp. Launched with karellen-jdb-mcp.
Agent
Use this agent when a Java application throws an unhandled exception, hangs (possible deadlock), produces wrong output, or when you have spent more than two rounds of reading source code trying to understand a Java bug without finding the root cause. This agent attaches JDB to the target JVM and uses breakpoints…
Hook
Runs when a session starts on startup, executing check-prerequisites.sh. From karellen/karellen-jdb-mcp.
Hook
Runs after a tool call finishes for Bash tool calls, executing detect-java-exception.sh. From karellen/karellen-jdb-mcp.
Hook
Runs when a tool call fails for Bash tool calls, executing detect-java-exception.sh. From karellen/karellen-jdb-mcp.
Skill Claude CodeCodex
Debug a Java application using JDB. Attaches to a running JVM, sets breakpoints, inspects state, and navigates execution to find the root cause of bugs.
Plugin Claude Code
rr reverse debugging for Claude Code via MCP - record, replay, and debug program executions with full forward and reverse control.
MCP server Claude CodeCodexCursor +2
MCP server "karellen-rr-mcp" as configured in karellen/karellen-rr-mcp. Launched with karellen-rr-mcp.
Instructions file
Instructions for karellen/karellen-rr-mcp, covering claude.md, project, build & test, lint and architecture.
Agent
Use this agent when a command or test exits with a signal (SIGSEGV, SIGABRT, SIGBUS, SIGFPE), produces a segfault or core dump, or when you have spent more than two rounds of reading source code trying to understand a crash, memory corruption, use-after-free, double-free, data race, or wrong-value bug without finding…
Hook
Runs when a session starts on startup, executing check-prerequisites.sh. From karellen/karellen-rr-mcp.
Hook
Runs after a tool call finishes for Bash tool calls, executing detect-crash.sh. From karellen/karellen-rr-mcp.
Hook
Runs when a tool call fails for Bash tool calls, executing detect-crash.sh. From karellen/karellen-rr-mcp.
Skill Claude CodeCodex
Debug a logic bug (wrong output, wrong value, incorrect behavior) using rr. Sets breakpoints at the point where the bug is observable, then reverse-executes to find where the computation went wrong.
Skill Claude CodeCodex
Debug a data race or concurrency bug using rr. Records the program, then uses deterministic replay with thread inspection and watchpoints to find the exact interleaving that caused the race.
Skill Claude CodeCodex
Debug a failing test using rr. Records the test suite, identifies the failing subprocess, and reverse-debugs just that process to find the root cause.
Skill Claude CodeCodex
Debug a crash or test failure using rr reverse debugging. Records a command, replays it, and works backwards from the failure to find the root cause.
Plugin Claude Code
LSP-backed code intelligence for Claude Code via MCP and native LSP - navigate definitions, references, call hierarchies, type hierarchies, and diagnostics across codebases.
MCP server Claude CodeCodexCursor +2
MCP server "karellen-lsp-mcp" as configured in karellen/karellen-lsp-mcp. Launched with karellen-lsp-mcp.
Instructions file
Instructions for karellen/karellen-lsp-mcp, covering project: karellen-lsp-mcp, build & test, project layout, key design details and change checklist.
Agent
Use this agent when you need deep code understanding across a large codebase, when tracing call chains or type hierarchies would require reading many files, when you need to find all references to a symbol, or when compiler diagnostics would help understand build errors. This agent registers the project with the…
Hook
Runs when a session starts on startup, executing check-prerequisites.sh. From karellen/karellen-lsp-mcp.
Hook
Runs after a tool call finishes for Bash tool calls, executing detect-lsp-opportunity.sh. From karellen/karellen-lsp-mcp.