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MICROSOFT JUST OPEN SOURCED THE ENTIRE AGENT RUNTIME, SO YOU NEVER HAVE TO BUILD ONE AGAIN
A raw model only writes text. To make it a real agent it needs a loop, tools, memory, planning, approvals, and a way to know when it is done. Microsoft's Agent Harness is that whole layer.
Gebookmarkt van @N01ennn (NO1ennn) op X. De harness zelf staat sinds 22–23 juli 2026 in Microsoft Agent Framework (Python + .NET).