Monster Method Decomposition

Decompose a very large method (100+ lines, deeply nested) safely using automated refactoring and Feathers' Bulleted/Snarled classification. Use whenever a developer faces 'a huge method', 'I have a 500-line function', 'deeply nested conditionals', 'monster method', 'god method', 'need to break up this giant method', 'can't test this method it's too big', 'where do I even start with this method'. Activates for 'method extraction', 'IDE refactoring', 'automated extract method', 'introduce sensing variable', 'find sequences', 'skeletonize', 'coupling count', 'bulleted method', 'snarled method', 'break out method object'.

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Install

Claude CodeClawhHubnpxCursorCodexGemini CLI

1. Add marketplace

› /plugin marketplace add bookforge-ai/bookforge-skills

2. Install plugin

› /plugin install working-effectively-with-legacy-code@bookforge-skills

3. Use the skill

› /monster-method-decomposition

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Source Book

Working Effectively with Legacy Code

Michael C. Feathers

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