ARCH — The vault root uses a Johnny Decimal spine (00-90 in tens) crossed with…
The vault root uses a Johnny Decimal spine (00-90 in tens) crossed with PARA (00 Meta, 10 Inbox, 20 Literature, 30 Permanent, 40 Projects, 50 Areas, 60 Resources, 70 Archive, 80 MOC, 90 GTD), giving every note a stable citable address independent of filename.
Source: PUMA project documentation · Traceability: corpus unit
ANXHN-041· Confidence: verified-at-primary-source