The handoff was written as a message to relay information; several
decisions lived only there. Split into permanent homes:
- docs/spec.md — scope, geometry model, pipeline order, detection,
levels, editor, project file, markers, bundle format, noteman's
changes, reference values
- ADR 0002 — raster only in release 1; SVG slices measured at 40x WebP
naive, 2.6x with a bounding-box cull, deferred on risk not size
- ADR 0003 — lossless WebP with levels and 16-level alpha; every lossy
option and alternative format measured larger for line art
- ADR 0004 — detection proposes, the human disposes; no unattended mode
- ADR 0005 — PyMuPDF for all PDF access, accepting AGPL
- ADR 0006 — systems are found by vertical brackets, not row-darkness
gaps, which miscount every page of a 6-voice score
Also from testing against the hardest score in the repertoire: scanned
PDFs carry their scan as an embedded image and must be extracted at
native resolution rather than re-rendered at 600 DPI, and per-page
deskew is mandatory (skew varies -2.6 to +1.2 within one PDF).
