Loop Engineering vs. Prompt Engineering — The Doctor's Second Opinion Analogy

Exact instruction

Conceptual only — no code shown. The implementation detail (how the second opinion is structured in a loop) is covered in follow-up videos by this creator.

Suggested prompt

After generating your main output, add: 'Now act as a reviewer. Read the output above and check whether it fully and correctly addresses the original request. If anything is missing, incorrect, or could be improved, say so explicitly. Otherwise confirm it's complete.'

Adopt?

Yes: Loop engineering (self-critique / verification pass before returning output) is a high-value technique. Add a verification step to any Claude workflow where output quality is critical — have a second prompt check the first output before it's accepted.

Find the resource

Check @derrickfromzero's profile for the follow-up videos in this loop engineering series (they were posting daily when this was published).

show original caption

A prompt is one doctor visit. A loop is that same doctor getting a 2nd opinion before they're allowed to tell you anything.