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arXiv · 2506.10622

SDialog: A Python Toolkit for End-to-End Agent Building, User Simulation, Dialog Generation, and Evaluation

Sergio Burdisso·Séverin Baroudi·Yanis Labrak·David Grunert·Pawel Cyrta·Yiyang Chen·Srikanth Madikeri·Thomas Schaaf·Esaú Villatoro-Tello·Ahmed Hassoon·Ricard Marxer·Petr Motlicek
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Abstract

We present SDialog, an MIT-licensed open-source Python toolkit that unifies dialog generation, evaluation and mechanistic interpretability into a single end-to-end framework for building and analyzing LLM-based conversational agents. Built around a standardized Dialog representation, SDialog provides: (1) persona-driven multi-agent simulation with composable orchestration for controlled, synthetic dialog generation, (2) comprehensive evaluation combining linguistic metrics, LLM-as-a-judge and functional correctness validators, (3) mechanistic interpretability tools for activation inspection and steering via feature ablation and induction, and (4) audio generation with full acoustic simulation including 3D room modeling and microphone effects. The toolkit integrates with all major LLM backends, enabling mixed-backend experiments under a unified API. By coupling generation, evaluation, and interpretability in a dialog-centric architecture, SDialog enables researchers to build, benchmark and understand conversational systems more systematically.

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Sergio Burdisso, Séverin Baroudi, Yanis Labrak, David Grunert, Pawel Cyrta, Yiyang Chen, Srikanth Madikeri, Thomas Schaaf, Esaú Villatoro-Tello, Ahmed Hassoon, Ricard Marxer, Petr Motlicek. 2026-01-16. SDialog: A Python Toolkit for End-to-End Agent Building, User Simulation, Dialog Generation, and Evaluation. https://doi.org/10.18653/v1%2F2026.eacl-demo.23

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