TonyBai

Apr 19, 2026 · Artificial Intelligence

Thin Harness, Fat Skills: Garry Tan’s AI Engineering Secrets for 1000× Efficiency

Garry Tan explains that the massive productivity gap among AI agents stems from bloated harness layers and weak skills, proposing a "Thin Harness, Fat Skills" architecture—four‑function harnesses, reusable markdown skill files, resolvers, latent‑vs‑deterministic separation, propensity analysis, and perpetual skill upgrades—to achieve up to a thousand‑fold efficiency gains.