Playgrounds, eval runners, and version control - what a serious prompt workflow needs in 2026.
The playground is where you draft; the eval runner is where you find out if the draft is any good.
Side-by-side diffs, a way to pin and replay test inputs, and history you can roll back. Anything that makes iteration faster than copy-paste is worth its price.
What actually moves output quality - and the small set of habits that beat clever one-liners every time.
A repeatable four-part structure for prompts that stay reliable as your product and models change.
Copy-ready building blocks - from role priming to output contracts - with annotated before/after examples.
