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The stack

4 picks · curated
03
Hacker News txt 208 c · 381 pts

Understanding is the new bottleneck

Geoffrey Litt argues that once a model writes code faster than you can read it, the limiting factor stops being production and becomes comprehension — and that most AI tooling optimizes the wrong side of that.

04
Marginal Revolution txt 8h

The economics of a shrinking world

Fernández-Villaverde and Norrick note that humanity is likely below replacement fertility as of 2026 — a first — and that the collapse is concentrated in low- and middle-income countries rather than rich ones.