Bhramastra at #SMM4H-HeaRD 2026: A Multi-Stage Hunter-Judge Pipeline using DSPy-Optimized LLMs for Multilingual ADE Detection

Bhaarat Pachori


Abstract
This paper describes the submission by **Team Bhramastra** for the **#SMM4H-HeaRD 2026** Shared Task 1, focused on personal Adverse Drug Event (ADE) detection in multilingual social media. A decoupled architecture, **Hunter-Judge**, is proposed to handle extreme class imbalance and linguistic variance across seven languages, including a surprise zero-shot Farsi set. The system employs a fine-tuned multilingual mDeBERTa-v3 model as a high-recall filter (**Hunter**), followed by a Gemini-2.5-Flash model (**Judge**) optimized via the **DSPy** framework for precision-oriented agentic adjudication. By implementing a reasoning protocol grounded in clinical RAG evidence and universal ingredient mapping, the pipeline achieved the **highest average F1-score (0.6653)** among all teams. Strong zero-shot generalizability on Farsi (**F1: 0.5863**) was demonstrated, highlighting the effectiveness of medically-grounded adjudication in low-resource contexts.
Anthology ID:
2026.smm4h-1.9
Volume:
Proceedings of the 11th Social Media Mining for Health Research and Applications (SMM4H-HeaRD 2026) Workshop and Shared Tasks
Month:
July
Year:
2026
Address:
San Diego, United States
Editors:
Guillermo Lopez-Garcia, Graciela Gonzalez-Hernandez
Venues:
SMM4H | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
49–55
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.smm4h-1.9/
DOI:
Bibkey:
Cite (ACL):
Bhaarat Pachori. 2026. Bhramastra at #SMM4H-HeaRD 2026: A Multi-Stage Hunter-Judge Pipeline using DSPy-Optimized LLMs for Multilingual ADE Detection. In Proceedings of the 11th Social Media Mining for Health Research and Applications (SMM4H-HeaRD 2026) Workshop and Shared Tasks, pages 49–55, San Diego, United States. Association for Computational Linguistics.
Cite (Informal):
Bhramastra at #SMM4H-HeaRD 2026: A Multi-Stage Hunter-Judge Pipeline using DSPy-Optimized LLMs for Multilingual ADE Detection (Pachori, SMM4H 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.smm4h-1.9.pdf