Captum is an extensible library that provides general-purpose implementations for model interpretability in PyTorch. It aims to demystify complex machine learning models by offering several algorithms to analyze and understand model predictions. Captum includes a variety of methods such as feature ablation, integrated gradients, and others, which help researchers and developers to comprehend and improve their models.

CommNet is a research-oriented library that implements the CommNet architecture, allowing multiple agents to share hidden states at each timestep and learn to coordinate actions in cooperative environments. It includes PyTorch model definitions, training and evaluation scripts, environment wrappers for OpenAI Gym, and utilities for customizing communication channels, agent counts, and network depths. Researchers and developers can use CommNet to prototype and benchmark inter-agent communication strategies on navigation, pursuit–evasion, and resource-collection tasks.