Ephemeral Testing

Lemire proposes ephemeral testing, using disposable AI-built apps to judge a library’s real API quality.

Daniel Lemire describes ephemeral testing, in which an AI agent builds temporary applications on top of a software component and those applications are thrown away. The original work is judged by how easily the agent produces working higher layers rather than by direct inspection alone. Clean APIs, stable invariants, and useful errors lead to quick success, while hidden state, surprising defaults, and incomplete docs produce patches and failures. He says he uses the method to prototype features, while still keeping a stable core.