Build a prompt template and versioning registry with variable substitution and rollback.
A prompt is code, but most teams edit it in a dashboard with no history and then cannot explain last Tuesday's quality drop. This is the small piece of infrastructure that makes prompts reviewable, pinnable, and instantly reversible.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
A prompt is code, but most teams edit it in a dashboard with no history and then cannot explain last Tuesday's quality drop. This is the small piece of infrastructure that makes prompts reviewable, pinnable, and instantly reversible.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
