The 150 MB of images are remanso's image CDN (it reads image bytes straight
out of git as blobs), not offloadable bloat — LFS/filter-repo/git-rm all
break remanso. libgit2 also lacks blobless partial clone. Decision: leave
the repo untouched and pre-seed the SD with a full clone from a computer, so
the device only ever takes the open + incremental fetch/push path. Also
notes the increment-C constraint: stage specific paths (not add_all) so a
media-excluding sparse checkout is safe.
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