Open-Source Ralph Loop Toolkit for Claude Code: Pickle Rick and Mr. Meeseeks Agents

Open-Source Ralph Loop Implementation for Claude Code

An open-source extension for Claude Code provides what the creator calls "the most complete Ralph Loop implementation out there." The toolkit implements the Ralph Wiggum technique — blocking exit, re-injecting context, and repeating — with two distinct autonomous agents.

Pickle Rick: PRD-Driven Development Loop

The /pickle command runs full PRD-driven development loops that take tasks through this sequence: PRD → Breakdown → Research → Plan → Implement → Refactor. It uses isolated Morty worker subprocesses per ticket, with a stop hook that blocks Claude from exiting until the task is genuinely done.

The /pickle-tmux mode spawns a fresh claude -p per iteration to eliminate context drift on long epics. It includes PRD refinement with 3 parallel analysts and a Pickle Jar feature for batch queuing.

Mr. Meeseeks: Autonomous Code Review Loop

The /meeseeks command runs an autonomous code review loop that executes tests first on every pass, then scans with escalating focus:

• Passes 1-3: Security scanning
• Passes 4-5: Logic bug detection
• Passes 6-7: Dead code removal
• Passes 8-9: Consistency checking
• Pass 10+: Polish and refinement

Mr. Meeseeks fixes everything it finds and commits after every pass. It requires a minimum of 10 clean passes before accepting the codebase is clean and ceasing to exist.

Shared Infrastructure

Both agents use tmux with a live 3-pane dashboard showing monitor + log stream + runner log. They provide macOS notifications on completion and perform full context clearing between iterations. The project is ported from galz10's Pickle Rick Gemini CLI extension and extended significantly.

The source is available at github.com/gregorydickson/pickle-rick-claude.