CLAUDE.md blog-archival rule: commit messages + task logs are blog source
material. This adds the *narrative* layer above the terse armada/tasks/ log —
the documentary 'what happened / what surprised us / what we learned.'

01 tells the emotion-engine story: building CLAP synonym-cluster emotion reads,
the surprise that a 22%% score hid a *systematic* warm-positive center-pull
('playful' fired for 18/60 tracks), and the affine-calibration fix that named
the bias (valence +0.25 too warm, arousal compressed 1.7x) and corrected it
under leave-one-out CV. Includes the n=5 stem-vs-mix call PLN refused to
conclude on — honesty over a clean win.