Sync walked wiki/ and knowledge/ with filepath.WalkDir and read each .md with os.ReadFile. A symlinked note (Syncthing syncs symlinks) had its target embedded into pgvector and served by semantic search; a FIFO stalled the sync. The walk and read now go through brainfs: regular files only, type checked on the opened handle. - Chunks already embedded from a symlinked note are deleted on the next sync, because the note is no longer seen. - A walk error still aborts Sync before the delete pass, so an unreadable subdir does not delete chunks of files that exist. A missing scan dir is skipped as before. - brainfs gains Lstat, used for the mtime staleness check. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>