Steven James
Steven James
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Reinforcement Learning
Keynote Address (title to be announced)
Invited keynote at RECODE 2026 (Research in Computing and Software Development), the University of Johannesburg’s 2nd Symposium for Master’s and Doctoral Students, held alongside the 40th ACSSE Projects Day.
14 Oct 2026
University of Johannesburg
PyCRM: A Python library for reward machine-based reinforcement learning
Reinforcement Learning (RL) research often models environments as Markov decision processes. Yet many real-world tasks are …
Tristan Bester
,
Geraud Nangue Tasse
,
Benjamin Rosman
,
Steven James
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Code
DOI
Drowning in Degrees of Freedom: One Agent for Every Task
Invited talk as part of the Early Career Spotlight (ECS) program at IJCAI-ECAI 2026, which highlights early-career researchers who have made significant contributions to AI.
19 Aug 2026
Congress Centrum Bremen
Drowning in Degrees of Freedom: One Agent for Every Task
We describe a research programme aimed at the construction of a single, generally intelligent agent—one competent across all …
Steven James
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Redistribution-based Cost Inference Improves Sparse Safe Offline RL
Safe offline RL typically assumes access to dense per-step cost annotations, but in practice supervisors provide only trajectory-level …
Ebenezer Gelo
,
Geraud Nangue Tasse
,
Steven James
,
Benjamin Rosman
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The Goal-Directed Frame for General Agents
Reinforcement learning is often framed around episodic, discounted, or average scalar rewards. While useful, these views miss a core …
Geraud Nangue Tasse
,
Steven James
,
Benjamin Rosman
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An Unreasonably Simple Approach to Safe RL
An important problem in reinforcement learning is designing agents that learn to solve tasks safely in an environment. A common …
Geraud Nangue Tasse
,
Mark Nemecek
,
Tamlin Love
,
Steven James
,
Benjamin Rosman
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Code
Weighted Composition for Entropy-regularised Reinforcement Learning
One avenue for creating a generally intelligent agent is to equip it with the ability to combine its previously learned behaviours to …
Caston Nyabadza
,
Benjamin Rosman
,
Steven James
,
Geraud Nangue Tasse
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MoralityGym: A Benchmark for Evaluating Hierarchical Moral Alignment in Sequential Decision-Making Agents
Evaluating moral alignment in agents navigating conflicting, hierarchically structured human norms is a critical challenge at the …
Simon Rosen
,
Siddarth Singh
,
Ebenezer Gelo
,
Helen Sarah Robertson
,
Ibrahim Suder
,
Victoria Williams
,
Benjamin Rosman
,
Geraud Nangue Tasse
,
Steven James
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Skill-Driven Neurosymbolic State Abstractions
We consider how to construct state abstractions compatible with a given set of abstract actions, to obtain a well-formed abstract …
Alper Ahmetoglu
,
Steven James
,
Cameron Allen
,
Sam Lobel
,
David Abel
,
George Konidaris
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