Blog

Notes on what we are working on and what we have found. Claims carry a number or a citation.

Published
28 Sep 2026
Author
Dan Lenton, unify
Read
15 min

Why we built Continual-ARC.

We ran three open agent harnesses through a stream of ARC tasks that keep coming back with fresh inputs, once with their memory on and once with it wiped before every instance. Their memory saved nothing we could measure, because left to themselves they kept almost nothing about a task. Told to keep one tested program per task, all three did far better.

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DatePostRead
Sep 2026
Why we built Continual-ARC.

We ran three open agent harnesses through a stream of ARC tasks that keep coming back with fresh inputs, once with their memory on and once with it wiped before every instance. Their memory saved nothing we could measure, because left to themselves they kept almost nothing about a task. Told to keep one tested program per task, all three did far better.

15 min
Aug 2026
The harness is not enough.

Harnesses are how today’s agents remember anything at all. They are a point-in-time fix, and continual parametric learning will replace them.

4 min