DeepSeek just open-sourced Harness – it can write its own missing tools while it runs, then cleanly remove them. 149k GitHub stars in four days. An 88-page paper underneath. It’s open, easy to install and it claims that *everything is a plugin.*
What does it mean?
We unpack that plus we discuss why DeepSeek Harness is not another Claude Code clone, but the moment the fixed coding agent starts to die.
We also look at the history of computing (Smalltalk, Unix, Codd) to ask whether “everything is a plugin” can do what “everything is an object” and “everything is a file” once did.
The question I want you to think about: once an agent can recompose itself, what exactly is the product anymore?
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Attention Span is here to show you AI isn’t magic. Sometimes the decisive move is engineering the layer everyone else treated as packaging.
*Links*
- DeepSeek Harness repository and installation: https://github.com/deepseek-ai/deepseek-harness
- Cordis repository: https://github.com/cordiverse/cordis
- Cordis paper: https://github.com/cordiverse/paper/blob/main/paper.pdf
- Koishi introduction, Touhou name origin, community, and plugin history: https://koishi.chat/en-US/manual/introduction
- Koishi repository: https://github.com/koishijs/koishi
- SmallTalk History https://computerhistory.org/blog/introducing-the-smalltalk-zoo-48-years-of-smalltalk-history-at-chm/
- Sholto Douglas post: https://x.com/_sholtodouglas/status/2088463770318516734
#AttentionSpan #DeepSeekHarness #DeepSeek #AIAgents #CodingAgents #EverythingIsAPlugin #OpenSource #Cordis #AgentArchitecture #TuringPost
