Giuseppe Destefanis

Extends the original snapshot with weekly app observations from 2019–2026 to examine platform governance, competition and application survival.

Argues that an agent skill is a software artefact and should be built with single responsibility, low coupling, and evaluation-driven authoring.

Keeping a project workable across resets and usage limits by treating state as files on disk, with disjoint roles for a Producer and a Composer.

A September 2025 snapshot of 4,213 active apps and 55 categories, examining concentration and the relationship between entry timing and recent growth.