BitSpeed Transfer used to move exactly one file, one chunk at a time. Version 0.5 takes a folder as the source and packs it into one payload with an index of every file’s size and SHA-256, so resume and the single receipt cover the whole folder. A new unpack command writes it out on the receiver after checking every file, and can run while the receiver keeps serving. Symlinks and special files are refused rather than skipped, and a folder that changes while it’s copied fails the snapshot.
Send now keeps four chunk uploads in flight by default, up to eight. Through a local proxy adding 100 ms per request, a 32 MiB file took about 4.4 s one chunk at a time and 1.8 s with four. Each chunk still goes through the same check, sync and link sequence before the receiver answers. An independent review found one real hole first: a re-sent chunk could be acknowledged after the stored copy had been moved aside as corrupt. Re-sent chunks now get their own temp file and a second look before the answer.
Inspect is unchanged at 0.3.0. The release has both tools, and the Windows and CI note covers the previous round.