DeepSeek is back... and Silicon Valley is terrified
DeepSeek released a coding agent harness that is the fastest-starred GitHub repo in history
“Everything is a plugin.”
DeepSeek launched a new AI coding agent harness ('DeepSeek Harness') that became the fastest-starred GitHub repo in history, directly challenging Claude Code and OpenAI Codex with a plugin-first architecture. The release coincides with OpenAI pausing frontier reinforcement learning training, which many attribute to competitive pressure from DeepSeek rather than stated safety concerns. The harness's 'everything is a plugin' design represents a meaningfully different architectural approach to agentic coding tools.