The 1:1 entries of a lineage as the head-key → base-key map
DiffOptions.keyAliases takes. split and merge entries are never
aliases (identity is 1:1); identity and replaced are, on exactly the
rules keyAliasesFromSidecar applies — self-claims dropped, a here two
entries disagree about dropped entirely.
The 1:1 entries of a lineage as the head-key → base-key map DiffOptions.keyAliases takes.
splitandmergeentries are never aliases (identity is 1:1);identityandreplacedare, on exactly the ruleskeyAliasesFromSidecarapplies — self-claims dropped, aheretwo entries disagree about dropped entirely.