Recompiled Bun standalone binaries into readable source code with Claude

The bun-demincer project provides a pipeline to decompile, deminify, and deobfuscate standalone JavaScript binaries produced by the Bun runtime. The tool extracts embedded JavaScript from the binary format, splits the code into individual modules, and classifies them as either vendor or application code using a fingerprint database. The deobfuscation process includes structural transforms, identifier recovery via MR() export mappings, and class name pattern matching. Claude Opus 4.6 contributed to the development of the pipeline, including the implementation of round-trip reassembly, which allows modified modules to be rebuilt into a functional binary. For remaining identifiers, the tool supports AI-assisted renaming using LLMs to infer semantic names from context. The pipeline also includes dependency graph generation and Louvain community detection to organize modules into semantic directories. The author reports that the extracted code is runnable, and the tool has been tested on output from Bun 1.3.10. Detailed documentation is available at https://raw.githubusercontent.com/vicnaum/bun-demincer/HEAD/README.md.