Towards LLM-Powered Task-Aware Retrieval of Scientific Workflows for Galaxy

• URL: http://arxiv.org/abs/2511.01757v1
• Date: Mon, 03 Nov 2025 17:12:03 GMT
• Title: Towards LLM-Powered Task-Aware Retrieval of Scientific Workflows for Galaxy
• Authors: Shamse Tasnim Cynthia, Banani Roy,
• Abstract summary: We propose a task-aware, two-stage retrieval framework that integrates dense vector search with large language model (LLM)-based reranking.<n>Our system first retrieves candidate using state-of-the-art embedding models and then reranks them using instruction-tuned generative LLMs.<n>We conduct a comprehensive comparison of lexical, dense, and reranking models using standard IR metrics, presenting the first systematic evaluation of retrieval performance in the Galaxy ecosystem.
• Score: 5.3326639738035055
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Scientific Workflow Management Systems (SWfMSs) such as Galaxy have become essential infrastructure in bioinformatics, supporting the design, execution, and sharing of complex multi-step analyses. Despite hosting hundreds of reusable workflows across domains, Galaxy's current keyword-based retrieval system offers limited support for semantic query interpretation and often fails to surface relevant workflows when exact term matches are absent. To address this gap, we propose a task-aware, two-stage retrieval framework that integrates dense vector search with large language model (LLM)-based reranking. Our system first retrieves candidate workflows using state-of-the-art embedding models and then reranks them using instruction-tuned generative LLMs (GPT-4o, Mistral-7B) based on semantic task alignment. To support robust evaluation, we construct a benchmark dataset of Galaxy workflows annotated with semantic topics via BERTopic and synthesize realistic task-oriented queries using LLMs. We conduct a comprehensive comparison of lexical, dense, and reranking models using standard IR metrics, presenting the first systematic evaluation of retrieval performance in the Galaxy ecosystem. Results show that our approach significantly improves top-k accuracy and relevance, particularly for long or under-specified queries. We further integrate our system as a prototype tool within Galaxy, providing a proof-of-concept for LLM-enhanced workflow search. This work advances the usability and accessibility of scientific workflows, especially for novice users and interdisciplinary researchers.

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