Add dataset card for Paper Circle database

Hi! I'm Niels from the Hugging Face community science team. I noticed this dataset is part of the "Paper Circle" framework but the dataset card is currently empty.

This PR:
- Links the dataset to the official paper: [Paper Circle: An Open-source Multi-agent Research Discovery and Analysis Framework](https://huggingface.co/papers/2604.06170).
- Adds the `text-retrieval` task category.
- Includes links to the GitHub repository and the project website.
- Provides a brief overview of the system and the official citation.

README.md

@@ -1,3 +1,37 @@
----
-license: mit
----
+---
+license: mit
+task_categories:
+- text-retrieval
+---
+
+# Paper Circle: Papers Database
+
+Paper Circle is an open-source multi-agent research discovery and analysis system designed to reduce the effort required to find, assess, organize, and understand academic literature. This repository contains the underlying papers database used by the framework's discovery and analysis pipelines.
+
+- **Paper:** [Paper Circle: An Open-source Multi-agent Research Discovery and Analysis Framework](https://huggingface.co/papers/2604.06170)
+- **Project Page:** [https://papercircle.vercel.app/](https://papercircle.vercel.app/)
+- **Repository:** [https://github.com/MAXNORM8650/papercircle](https://github.com/MAXNORM8650/papercircle)
+
+## System Overview
+
+The Paper Circle system comprises two complementary pipelines:
+1. **Discovery Pipeline:** Integrates offline and online retrieval from multiple sources (arXiv, Scopus, IEEE), featuring multi-criteria scoring and diversity-aware ranking.
+2. **Analysis Pipeline:** Transforms individual papers into structured knowledge graphs with typed nodes (concepts, methods, experiments, figures) to enable graph-aware question answering and coverage verification.
+
+Both pipelines are implemented within a coder LLM-based multi-agent orchestration framework and produce fully reproducible, synchronized outputs.
+
+## Citation
+
+If you find Paper Circle useful in your research, please cite the following paper:
+
+```bibtex
+@misc{kumar2026papercircleopensourcemultiagent,
+      title={Paper Circle: An Open-source Multi-agent Research Discovery and Analysis Framework}, 
+      author={Komal Kumar and Aman Chadha and Salman Khan and Fahad Shahbaz Khan and Hisham Cholakkal},
+      year={2026},
+      eprint={2604.06170},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2604.06170}, 
+}
+```