251 sets that profiles or platforms now name were imported from MAME 0.289 only. Replaying the 22 cached listxml releases adds their older recipes (a2pic 0.220 carries 341-0057.bin) and loses none of the 2148 existing ones.
The recipe snapshot kept only the archives a profile or platform names,
so provenance_report --missing named no set for dumps a public romset
carries (fm7740sx holds the FM77AV40SX DICROM, EXTSUB and KANJI2 ROMs).
The importer now also keeps the sets holding a catalog entry the
collection lacks. Reimported from mame0289 and the cached FBNeo DATs:
MAME 1726 to 2148 recipes, FBNeo 104 to 111, none dropped.
A profile's contents: block and a DAT both state, per set, the members
one emulator version expects. Torrentzip makes archive bytes a function
of that list alone, so a recipe plus the roms reproduces the archive
exactly.
MAME ships its -listxml as a release asset and FBNeo keeps its dats in
its repository, so neither needs a browser. The importer streams the
311 MB document with a sliding window, resolves romof parents in two
passes, drops undumped members, and accumulates versions instead of
replacing them. Identical recipes shared across versions are stored once
with dats listing every version that agrees: 22 MAME versions give 23679
entries for 1726 distinct recipes, 18 MB down to 2.2 MB.
Snapshots live in recipes/ because load_provenance_snapshots reads every
provenance/*.json as a dump catalogue, and a recipe is not one.
1113 archives now reproduce byte for byte, against 175 from profiles
alone, and spec128.zip is rebuilt from roms already held.
Abdessamad Derraz