Real scars: analyzer input source that reads review / friction notes
from the workspace ledger, and emits High-severity lessons only when the
same problem shows up twice or more — havamal’s “no scar, no doctrine”
rule made mechanical.
Sign-check: surface doctrine entries that share a family with a machine
candidate — so at sign time the operator sees related existing scars
next to the candidate, and can judge for themselves whether it duplicates
or contradicts what’s already in doctrine.