This is the artefact of the paper adding LLM to Gin: Enhancing Genetic Improvement Mutations Using Large Language Models with additional data. The code, LLMs prompt and experimental infrastructure, data from the evaluation, and results are available as open source at here. The code is also under the ‘llm’ branch of github.com/gintool/gin (commit 9fe9bdf; branched from master commit 2359f57 pending full integration with Gin).