Decision: no decoders are reimplemented. Extraction goes through ServUO's own
vendored Ultima, which Scripts.csproj already references, so the art half of
this protocol is plumbing and the Mythic cliloc reader (§9) becomes the only
decoder Protocol 8 writes rather than calls.
What makes that safe rather than merely cheap is a distinction §1.1 did not
draw. All three decoders build a FileIndex, but only Gumps passes
hasExtra: true — and FileIndex.cs's own comment says that branch exists FOR
gumpartlegacy.uop, the one UOP layout with an extra field. Art passes
hasExtra: false and probed 49,150 statics plus 16,384 land tiles with zero
faults; Animations touches no UOP at all and probed 1,144 bodies clean. The
access violation is a bug on a branch exactly one decoder reaches, and that
decoder was already out of scope. So "nothing calls Ultima.Gumps" is now a
safety rule, and adding gump art later means fixing that path first.
§4.2 records the three costs this accepts: six of twelve stock player bodies
have no art (UOP-only, not reachable by calling the existing code differently),
System.Drawing stays in the decode path, and we inherit whatever Ultima a shard
vendors — EXTRACTOR_VERSION already covers the last one.
Phase 0 changes shape with it. It was going to prove new decoders byte-identical;
it now tries to BREAK the vendored ones on purpose, from inside a running ServUO
against a deliberately patched client, because the probes behind §1.1 ran in
PowerShell against a stock client and neither is the real environment.
§17 is down to one real question: libgdiplus on Linux/Mono shards.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016wDDVXWMDz82WqE1i969r4
wtclaude
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