- Match the rcopy worktree-add registration via realpath: git canonicalizes
the admin gitdir back-reference (macOS /var -> /private/var), so the
lexical comparison missed it and left a stale registration in the source
repo's worktree list.
- Carry core.fileMode so an explicit filemode=false source does not read as
mode-changed files in the detached isolation.
- Carry core.splitIndex and the sharedindex.* files referenced by a split
source index; restoring the raw index without them broke every git read.
- Carry the source shallow boundary file so history traversal over the
borrowed object DB stops at the boundary instead of failing.
- Regression test covering all three carries.
can1357
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