Most of the recent gains in AI agents came from the software wrapped around the model, not the weights. A history of the harness in three stages — the token loop, the static harness, and the harness that improves itself — alongside YC’s own path from a shared bot to a centralised multi-user agent system.

OpenAI has released a claimed construction of finite-time blow-up for the forced 3D Navier–Stokes equations. Reading it against my earlier first-principles analysis, much of the physical structure fits — coherent alignment, anisotropic collapse, viscosity managed rather than defeated — and the differences are even more instructive.

I asked the current frontier models to attack the 3D Navier–Stokes regularity problem from first principles. They did not solve it — but they came back with an exact spectral-centre identity, a strict Lyapunov functional, and a much sharper description of what a hypothetical blow-up would have to accomplish.

An English summary of Su Jianlin’s derivation of Quantile Balancing — posing MoE load balancing as a constrained assignment problem, and showing that biased Top-k routing falls out of its dual as a set of expert congestion prices.

Viewing transformers as long-term memory, working memory, and associative retrieval — and how Anthropic’s Workspace and J-Lens results fit into a memory-centric picture of the residual stream.

How attention mixes tokens via a modern Hopfield retrieval over context, while the MLP mixes channels via a Hopfield-like lookup into learned, persistent memories.

Reflections on a Zen koan and the ‘bitter lesson’ in AI – a call to let go of biases.