The DeepSeek Harness and Everything is a Plug-in Philosophy

This article explores the DeepSeek Harness (dsh), a modular framework built on an "everything is a plugin" philosophy that allows users to swap models, tools, and interfaces. Through a vendor evaluation use-case, the authors demonstrate how dsh’s ability to fork sessions and track agent trajectories enables users to re-evaluate past decisions with new information without polluting the existing context. Ultimately, this architecture provides the high level of observability needed to debug, compare scenarios, and manage complex AI agent workflows.