Spec-driven development
Writing a clear specification first (requirements, constraints, acceptance tests) and having an agent build against it. A deliberate counterweight to vibe coding.
“For the client portal we went spec-driven: one markdown spec, then the agent built it in stages.”
See also
Part of the Extended list
Spec-driven development is on the Extended list: builder jargon, industry terms, and newer slang for when you want to go further. It entered common use around 2025.