Harness profile

DeepSeek Harness

MITTypeScript212k+ (Sep 25, 2026) GitHub stars (Aug 2026)

MakerDeepSeek

LicenseMIT

StackTypeScript

ModelsAny - everything is a plugin, including the agent loop

Runs whereYours to host; can drive Claude Code or Codex as child processes

Behavior changed byPlugins and Markdown

Durable memoryPlugin-dependent

Drives other agentsYes

Best for

Assembling a harness from parts, or putting one harness in front of several others. 95,386 GitHub stars in about two days after its Aug 13, 2026 launch, and 212k+ by late September - one of the fastest adoption curves GitHub has recorded.

Main weakness

Developer preview since Aug 13, 2026, iterating fast enough that nothing about it is stable yet. Standardizing on it today is not a conservative act.

Official docs / repo · Not sure? Run the chooser

Profile facts from the winder.ai comparison of nine agent harnesses (table checked Aug 19, 2026; DeepSeek Harness star count updated Sep 25, 2026 from the live GitHub repo) and vendor documentation. If something here is stale, the vendor page wins - tell us via the kit signup and we will fix it.