Decomp Permuter

About

The Decomp Permuter skill integrates the power of the decomp-permuter tool directly into Claude's workflow, specializing in the final stages of function matching for legacy game decompilation. It is designed to bridge the gap between a 95% match and a 100% match by automatically rearranging C code patterns to satisfy specific compiler register allocations and instruction ordering. This skill is particularly useful for N64 and MIPS-based projects where minor C variations significantly impact the resulting binary, allowing developers to automate the tedious trial-and-error process of matching optimized assembly.

Key Features

• Automated C code permutation for binary alignment
• Support for iterative 'base_N.c' source file management
• Configurable execution timeouts to prevent process hanging
• Detailed diff generation for reviewing match improvements
• Direct integration with project-specific scoring tools
• 61 GitHub stars

Use Cases

• Resolving register allocation mismatches in functions with 95%+ match rates
• Refining decompiled MIPS code to achieve perfect byte-for-byte binary equivalence
• Automating the search for specific C patterns that trigger legacy compiler optimizations