TestSubject is a cognitive simulation platform that models people — their skills, knowledge, preferences, opinions, goals, likes, and dislikes. These models simulate how a specific individual would respond to new information, how a group of experts would react in a meeting, or how effectively a tutorial teaches a particular type of learner.

Software is built by people, documented for people, and managed by people. Understanding how people learn, think, and interact is as important as understanding code. TestSubject provides computational models of human cognition and expertise that can be used standalone or composed with other tools across the Linkuistics ecosystem.

Development is planned in three phases: learner models for documentation validation (Phase 1), individual expertise profiles covering skills, preferences, and communication style (Phase 2), and multi-agent group simulation for meeting prediction and code review dynamics (Phase 3). The project is currently in the design and planning phase.