Review round 1 on PR #166: fs.WalkDir stats its root with a follow, and os.Root allows a symlink that stays inside the brain, so knowledge -> . aliased raw/, sessions/ and root files into the embeddings (and a wiki/<w> -> .. root into search results). On main, filepath.WalkDir Lstat'ed the root and did not descend. - WalkRegular Lstats its root and requires a real directory; anything else goes to onErr as ErrNotRegular and nothing is yielded. - Sync skips a missing scan root via bfs.Lstat before walking, and every other walk error, including a symlinked root, aborts before the delete pass. This removes the unpinned rel == sub special case. - Search warns and skips a symlinked root (new test). - Test renamed to TestSyncRefusesSymlinkedNotesAndSurvivesSwapRaces. - wrapAfterStat comment: brainfs tests must not use t.Parallel. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>