A library that was written, declared, tested, and never registered

The conformance probe reported sceUserServiceInitialize and sceUserServiceGetInitialUser both answering 0x7fff0001, so it could not open a display. That is our own placeholder, so the reading was "these are unimplemented" and the next step looked like choosing a user id - which is exactly the decision the probe's own notes warn about, having watched another project pick a value its own display code then rejected.

Both have been implemented since D274. The crate serves two libraries and register handed over one of them, so every call resolved to a stub (D281).

The evidence took three commands and no guessing: the implementation is there and writes four bytes through the caller's int *; guest_module! declares libSceUserService in a nested module; register mentions MODULE once. Then orbistoun-cli imports titles/obscene/eboot.bin confirmed the probe asks for both from that exact library.

What made it invisible

There was already a test asserting every implementation is declared, and its comment calls out both libraries by name - "checking only the first would report the user service as undeclared while it worked". Somebody had already thought about this crate having two modules, in the place where two modules mattered.

Nothing checked declared against registered. The test now does, through resolve rather than by counting modules, because a count is satisfied by registering the same one twice. It was watched failing with the fix removed before being kept:

sceUserServiceInitialize is declared and implemented, but its library never reaches the registry

The general point, which is worth more than the fix

0x7fff0001 correctly says nothing implemented this. It cannot say why, and the two whys want opposite work: one is a person writing code, the other is one line. A function-shaped finding was not just under-specified here, it was wrong about the cause - which is the strongest argument yet for the library-shaped findings the probe's handover proposes.

Same shape as D275 one layer up, where sceKernelReadTsc was never declared at all and every sleep therefore looked instantaneous.