Turn a concept just hit in live work into an immediately usable nugget — correct the user's guessed name, give the real terms of art, extract smells with concrete tests grounded in the incident's own numbers, and end on a one-line principle. Use when the user asks "what is this called?", guesses a name ("is this tree-shaking?"), or wants heuristics from a lesson just learned. Chat output only; deep study escalates to /teach.
