K3’s preserved thinking history may depend on harness compatibility
ZainHasan6 · x · 2026-07-20
K3 was trained with a preserved thinking history mode.
The post argues that many harnesses may not be using this feature correctly, which could push the model’s effective intelligence back several generations. The attached note warns that if the agent harness fails to pass back the full historical thinking context, or if a live session is switched over to K3, generation quality can become highly unstable. It recommends using a harness with verified compatibility, such as Kimi Code, and avoiding switching to K3 in the middle of a session.
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