CITIC Securities Report: DeepSeek Harness Plugin Architecture May Be Key to Ecosystem Commercialization

The center of gravity in agent competition is shifting from model capability itself toward stable, easy-to-use, and low-cost task delivery. In a report published on October 19, CITIC Securities' research team proposed that Harness (abbreviated dsh), open-sourced by DeepSeek in August 2026, may become a key link in its transition from model supply to platform ecosystem, converting open-source and engineering advantages into a user base, ecosystem influence, and commercialization capability.

Harness's most prominent design principle is 'Everything is a Plugin': models, tools, skills, sessions, sandboxes, storage, agent loops, scheduling, UI, and all other capabilities are provided as plugins through the underlying plugin system Cordis. The report argues that this architecture enables DeepSeek to expand user and task coverage through pluginization, scenario presets, and cross-agent collaboration, extending its infrastructure advantage from hardware-software co-design to complete task execution.

The long-term value chain the report outlines is: ecosystem expansion accumulates demand, configuration and workflow sedimentation strengthen product stickiness, and traceability supports safety governance, together creating conditions for sustained use and enterprise deployment. On the basis of official model calls, the company can further explore platform services and ecosystem transactions, converting accumulated ecosystem value into more diverse revenue sources and supporting reinvestment in products and the ecosystem.