Use whenever a TRACKED FACT happens; a baseline anchored, a sweep started or finished, an IC/RankIC measured, a commit blessed as a comparison point, a decision made — anything "this is what actually happened today". Also use at session entry — first action when returning to the project — to scan the last 10–20 entries and produce a one-paragraph state summary ("the frontier is X, pending sweeps are Y, last baseline was Z"). Strictly separated from speculation; hypotheses, surprises, and explanations go to qx-notebook-the-anomaly; analogies go to qx-transpose-from-another-field; classified architecture decisions go to qx-protect-or-relax-the-hard-core. The ledger is for w…
