The Prompting Stack is a field guide. The useful work has kept moving outward, from the words in a prompt toward the information a system can see, the controls around a run, the loop that checks the work, and the shape of the workflow itself.
The guide is published in full at prompting.2.works. That is the text to read: version 1.0, 25 July 2026, about a 91-minute read. Quantitative claims there are tied to named models, benchmarks, and sources.
Prompting with purpose is the short companion. It stays at the keyboard: three patterns, three prompts, and a way to check the result. This field guide is the map of the system those patterns sit inside.