AnalysisAI AgentsOctober 19, 2026

Talk: agent harnesses matter more as models get smarter

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Jediah Katz, described as Cursor's longest-tenured agent-harness engineer and now at SpaceX, argues fancy harnesses no longer add coding intelligence because the data flywheel teaches models the skills harnesses once patched in. He then argues the harness matters more than ever.

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