Records what was measured rather than assumed: pt.minecraft.wiki as the
source, forced tool_choice for term selection (5/5 against 2/7 for
free-text extraction), full article text over exintro, and M2.7 over M3.
Also records two defects found while measuring — empty replies caused by
hidden reasoning eating max_tokens at the deployed value of 300, and
foreign-token leakage into Portuguese answers.
marcos