- README: 'Use as an API' — Python import / CLI subprocess / HTTP API, the
  path+catch.json contract, env overrides (for sibling tools e.g. the #89
  emotional-arc tool that consumes the demucs engine for stems)
- README: add 'link' to CLI reference
- research/{A,B,C}_*.md: the three strand reports (empirical profile,
  fundamentals rulebook, prior-art + recommended zero-dep stack)
- research/PHASE2_FINDINGS.md: strand-D synthesis — corrected per-stem model
  (loops cut per stem, often-but-not-always time-aligned), loopability rubric,
  Take/StemSlice model, correlation engine (§5·0 GT-at-scale), Hall of Fame
  tierlist, section-label grounding (↔ #89), 80/20 build order
- PHASE2_LOOPFINDER.md charter: grounded in the real flow + ground-truth pairs