I am a CNRS researcher in the Software Engineering group at LaBRI (Bordeaux, France). My research revolves around software and software languages, with a focus on evolution, modularity, and comprehension. I craft tools to help researchers analyze software and assist developers in evolving their codebases. More details in my CV.

My main research interests include:

• Software evolution
• Software libraries, APIs, ecosystems, and dependencies
• Empirical software engineering
• Software language engineering and domain-specific languages

In past lives, I spent three years as a postdoctoral researcher with the Software Analysis and Transformation group at CWI (Amsterdam, Netherlands) and completed my PhD as part of the DiverSE group at IRISA (Rennes, France).

• Roseau: Fast, Accurate, Source-based API Breaking Change Analysis in Java
  C. Latappy, T. Degueule, J-R. Falleri, R. Robbes, L. Ochoa
  In International Conference on Software Maintenance and Evolution (ICSME), 2025.

  Preprint to come

• Client–Library Compatibility Testing with API Interaction Snapshots
  G. Monce, T. Degueule, J-R. Falleri, R. Robbes
  In International Conference on Software Maintenance and Evolution, NIER track (ICSME–NIER), 2025.

  Preprint to come

• What Happened in this Pipeline? Diffing Build Logs with CiDiff
  N. Hubner, J-R. Falleri, R. Uricaru, T. Degueule, T. Durieux
  In Proceedings of the ACM on Software Engineering (ISSTA), 2025.

  Preprint DOI Tool Artefacts

• Automatic Classification of Software Repositories: a Systematic Mapping Study
  S. Balla, T. Degueule, R. Robbes, J-R. Falleri, S. Zacchiroli
  In International Conference on Evaluation and Assessment in Software Engineering (EASE), 2025.

  Preprint DOI Artefacts

• Balancing the Quality and Cost of Updating Dependencies
  D. Jaime, P. Poizat, J. El Haddad, T. Degueule
  In International Conference on Automated Software Engineering (ASE), 2024.

  Preprint DOI Tool Artefacts

• Lightweight Syntactic API Usage Analysis with UCov
  G. Monce, T. Couturou, Y. Hamdaoui, T. Degueule, J-R. Falleri
  In International Conference on Program Comprehension (ICPC), 2024.

  Preprint DOI Tool Artefacts

• What the Fix? A Study of ASAT Rules Documentation
  C. Latappy, T. Degueule, J-R. Falleri, R. Robbes, X. Blanc, C. Teyton
  In International Conference on Program Comprehension (ICPC), 2024.

  Preprint DOI Artefacts Zenodo

• MOON: Assisting Students in Completing Educational Notebook Scenarios
  C. Casseau, J-R. Falleri, T. Degueule, X. Blanc
  In Symposium on Visual Languages and Human-Centric Computing (VL/HCC), 2023.

  Preprint DOI Artefacts

• MLinter: Learning Coding Practices from Examples—Dream or Reality?
  C. Latappy, Q. Perez, T. Degueule, J-R. Falleri, C. Urtado, S. Vauttier, X. Blanc, C. Teyton
  In International Conference on Software Analysis, Evolution and Reengineering (SANER), 2023.

  Preprint DOI Dataset

• BreakBot: Analyzing the Impact of Breaking Changes to Assist Library Evolution
  L. Ochoa, T. Degueule, J-R. Falleri
  In International Conference on Software Engineering: New Ideas and Emerging Results, (ICSE-NIER), 2022.

  Preprint DOI Tool

• Breaking Bad? Semantic Versioning and Impact of Breaking Changes in Maven Central
  L. Ochoa, T. Degueule, J-R. Falleri, J. Vinju
  In Empirical Software Engineering (EMSE), 2022.

  Preprint DOI Companion webpage Artefacts Tool

• Immediate Feedback for Students to Solve Notebook Reproducibility Problems in the Classroom
  C. Casseau, J-R. Falleri, X. Blanc, T. Degueule
  In Symposium on Visual Languages and Human-Centric Computing (VL/HCC), 2021.

  Preprint DOI Artefacts

• Automatic Generation of Truffle-Based Interpreters for Domain-Specific Languages
  M. Leduc, G. Jouneaux, T. Degueule, G. Le Guernic, O. Barais, B. Combemale
  In Journal of Object Technology (JOT), 2020. ECMFA papers.

  PDF DOI Companion webpage Tool

• FOCUS: A Recommender System for Mining API Function Calls and Usage Patterns
  PT. Nguyen, J. Di Rocco, D. Di Ruscio, L. Ochoa, T. Degueule, M. Di Penta
  In 41th International Conference on Software Engineering (ICSE), 2019.

  Preprint DOI Tool Artefacts

• The Software Language Extension Problem
  M. Leduc, T. Degueule, E. Van Wyk, B. Combemale
  Expert Voice in Software & Systems Modeling (SoSyM), 2019.

  Preprint DOI

• An Empirical Evaluation of OSGi Dependencies Best Practices in the Eclipse IDE
  L. Ochoa, T. Degueule, J. Vinju
  In 15th International Conference on Mining Software Repositories (MSR), 2018.

  Preprint DOI Artefacts

• Constraint-based Runtime State Migration for Live Modeling
  U. Tikhonova, J. Stoel, T. van der Storm, T. Degueule
  In 11th International Conference on Software Language Engineering (SLE), 2018.

  Preprint DOI Tool

• Modular Language Composition for the Masses
  M. Leduc, T. Degueule, B. Combemale
  In 11th International Conference on Software Language Engineering (SLE), 2018.

  Preprint DOI Tool

• Shape-Diverse DSLs: Languages without Borders (Vision Paper)
  F. Coulon, T. Degueule, T. van der Storm, B. Combemale
  In 11th International Conference on Software Language Engineering (SLE), 2018.

  Preprint DOI Tool

• Concern-Oriented Language Development (COLD): Fostering Reuse in Language Engineering
  B. Combemale, J. Kienzle, G. Mussbacher, O. Barais, E. Bousse, W. Cazzola, P. Collet, T. Degueule, R. Heinrich, JM. Jézéquel, M. Leduc, T. Mayerhofer, S. Mosser, M. Schöttle, M. Strittmatter, Andreas Wortmann
  In Computer Languages, Systems, and Structures, 2018.

  Preprint DOI

• Revisiting Visitors for Modular Extension of Executable DSMLs
  M. Leduc, T. Degueule, B. Combemale, T. van der Storm, O. Barais
  In International Conference on Model-Driven Engineering Languages and Systems (MODELS), 2017.

  Preprint DOI Tool Artefacts

• Safe Model Polymorphism for Flexible Modeling
  T. Degueule, B. Combemale, A. Blouin, O. Barais, JM. Jézéquel
  In Computer Languages, Systems, and Structures (COMLAN), 2017.

  Preprint DOI Artefacts

• On Language Interfaces
  T. Degueule, B. Combemale, JM. Jézéquel
  In PAUSE: Present and Ulterior Software Engineering, 2017.
  Ed. Bertrand Meyer and Manuel Mazzara.

  Preprint DOI

• Engineering a Rover Language in GEMOC Studio & Monticore: A Comparison of Language Reuse Support
  T. Degueule, T. Mayerhofer, A. Wortmann
  In 1st Workshop on Model Driven Engineering Tools (MDETools@MODELS), 2017.

  Preprint

• Leveraging Software Product Lines Engineering in the Development of External DSLs: A Systematic Literature Review
  D. Méndez-Acuña, JA. Galindo, T. Degueule, B. Combemale, B. Baudry
  In Computer Languages, Systems, and Structures (COMLAN), 2016.

  Preprint DOI

• Execution Framework of the GEMOC Studio (Tool Demo)
  E. Bousse, T. Degueule, D. Vojtisek, T. Mayerhofer, J. Deantoni, B. Combemale
  In International Conference on Software Language Engineering (SLE), 2016.

  Preprint DOI

• Melange: A Meta-language for Modular and Reusable Development of DSLs
  T. Degueule, B. Combemale, A. Blouin, O. Barais, JM. Jézéquel
  In International Conference on Software Language Engineering (SLE), 2015.

  Preprint DOI Tool

• Towards an Automation of the Mutation Analysis Dedicated to Model Transformation
  V. Aranega, JM. Mottu, A. Etien, T. Degueule, B. Baudry, JL. Dekeyser
  In Software Testing, Verification, and Reliability (STVR), 2015.

  Preprint DOI

• A Solution to the TTC'15 Model Execution Case Using the GEMOC Studio
  B. Combemale, J. DeAntoni, O. Barais, C. Brun, A. Blouin, T. Degueule, E. Bousse, D. Vojtisek
  In Proceedings of the 8th Transformation Tool Contest (TTC@STAF), 2015.
  Overall winner of the model execution case.

  Preprint Artefacts

• Tooling Support for Variability and Architectural Patterns in Systems Engineering
  T. Degueule, JB. Ferreira Filho, O. Barais, M. Acher, J. Lenoir, O. Constant, S. Madelénat, G. Gailliard, G. Burlot
  In International Software Product Line Conference (SPLC), 2015.
  Tool demonstration.

  Preprint DOI Tool

• Reusing Legacy DSLs with Melange
  T. Degueule, B. Combemale, A. Blouin, O. Barais
  In International Workshop on Domain-Specific Modeling (DSM), 2015.

  Preprint DOI

• Motivating Use Cases for the Globalization of DSLs
  BHC. Cheng, T. Degueule, C. Atkinson, S. Clarke, U. Frank, PJ. Mosterman, J. Sztipanovits
  In Globalizing Domain-Specific Languages, 2014.
  Ed. Benoit Combemale, Betty Cheng, Robert B. France, Jean-Marc Jézéquel, Bernhard Rumpe.

  Preprint DOI

• When Systems Engineering Meets Software Language Engineering
  JM. Jézéquel, D. Méndez-Acuña, T. Degueule, B. Combemale, O. Barais
  In Complex Systems Design & Management (CSDM), 2014.

  Preprint DOI

• Variability and Patterns in Safety/Security Systems Engineering: An Overview
  T. Degueule, JB. Ferreira Filho, J. Le Noir, O. Barais, M. Acher, G. Gailliard, G. Burlot, O. Constant, S. Madelénat
  In Journées Lignes de Produits (JLDP), 2014.
  National French Symposium.

• Using Meta-model Coverage to Qualify Test Oracles
  O. Finot, JM. Mottu, G. Sunyé, T. Degueule
  In International Workshop on the Analysis of Model Transformations (AMT), 2013.

  Preprint

Others

• Composition and Interoperability for External Domain-Specific Language Engineering
  Thomas Degueule
  PhD Thesis, 2016
  Advisors: Pr. Olivier Barais, Dr. Arnaud Blouin, Dr. Benoit Combemale.
  More information on the dedicated webpage.

• Automatic Generation of Test Models for Model Transformations using Mutation Analysis
  Thomas Degueule
  Master Thesis, 2013
  Advisors: Dr. Jean-Marie Mottu, Dr. Gerson Sunyé.

  PDF Slides

• Gustave Monce (University of Bordeaux): behavioral software library evolution (2022–ongoing)
• Lina Ochoa defended her thesis "Break the Code? Breaking Changes and Their Impact on Software Evolution", Cum Laude, and is now an assistant professor at Eindhoven University of Technology (2017–2023)
• Corentin Latappy defended his thesis "Coding practices: from documentation to detection" and is now a post-doc at the University of Bordeaux (2021–2024)
• Christophe Casseau defended his thesis "Support for Jupyter Notebooks in Education" and is now a lecturer at the University of Bordeaux (2020–2024)

• ANR JCJC ALIEN (PI): Usage-driven Software Library Evolution (2022–2025)
• H2020 CROSSMINER (WP leader): Developer-Centric Knowledge Mining from Large Open-Source Software Repositories (2017–2019)
• ALE (Associate member): Agile Language Engineering, Associate team between Inria's DiverSE and CWI's SWAT (2017–2022)
• LEOC Clarity (Member): Ecosystem for the Model-Based Systems Engineering Solution Capella (2014–2017)
• ANR INS GEMOC (Member): A Tool-Supported Approach for Omniscient Debugging and Concurrent Execution of Heterogeneous Models (2012–2016)
• ITEA2 MERgE (Member): Multi-Concerns Interactions System Engineering (2012–2016)

• Software library evolution: Roseau, Maracas, and BreakBot
• Software language engineering: Melange, Eclipse GEMOC Studio, K3, Alex
• OSS mining: Eclipse Scava

• thomas.degueule <you_know_what> labri.fr
• LaBRI, Office 215. 351, cours de la Libération F-33405 Talence Cedex.