arxiv:2508.05728

CLAPP: The CLASS LLM Agent for Pair Programming

Published on Aug 7

Authors:

Santiago Casas ,

Abstract

CLAPP, an AI assistant using LLMs and domain-specific retrieval, supports researchers with the CLASS solver by providing conversational coding, debugging, and plotting assistance.

AI-generated summary

We introduce CLAPP (CLASS LLM Agent for Pair Programming), an interactive AI assistant designed to support researchers working with the Einstein-Boltzmann solver CLASS. CLAPP leverages large language models (LLMs) and domain-specific retrieval to provide conversational coding support for CLASS-answering questions, generating code, debugging errors, and producing plots. Its architecture combines multi-agent LLM orchestration, semantic search across CLASS documentation, and a live Python execution environment. Deployed as a user-friendly web application, CLAPP lowers the entry barrier for scientists unfamiliar with AI tools and enables more productive human-AI collaboration in computational and numerical cosmology. The app is available at https://classclapp.streamlit.app

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