Product briefing
What it is and how it fits a coding workflow
DeepSeek Harness is infrastructure for building and operating agents, not a polished coding assistant aimed at every developer. Its core idea is to make models, tools, skills, sessions, sandboxes, storage, loops and UI composable plugins. This is valuable to agent engineers who want to swap runtime components or study how the harness affects an agent’s behavior. The project is explicitly in developer preview, so expect API and architecture changes; evaluate sandboxing and plugin trust carefully before exposing it to valuable repositories or credentials.