TextIndex in sylpheed-formats::localization already indexes per-phase objective
text under S<NN>_P<n>_Objective_<i>, with hints and lose conditions alongside.
Querying it settles what the wave work spent many iterations circling, and a
disc test now pins it.
Stage 02 phase 1 is "Shoot down all invading enemy fighters while watching out
for attacks on the ACROPOLIS", losing if the ACROPOLIS is sunk. Phase 2 is
"Protect the Admiral's ship the CALIBAN until it has entered the safe zone",
losing if the CALIBAN is sunk. Phase 3 is "Destroy the interstellar cruise
missiles headed for Schlos Base", matching phase 3's roster of exactly nine
ISCMissile and SUBOBJ_013.
That explains the phase advances and shows they are not all the same kind. Phase
1 is a kill-all-marked-fighters gate -- fighters, not the turrets every run
killed almost exclusively. Phase 2 is positional and ends when the CALIBAN
reaches a safe zone, so "what advances a phase" never had a single answer.
It also closes a loop to the first session. The hints say red mission markers
[OB] indicate your targets, so REMAINING OB -- the HUD counter hunted in the
earliest iterations and located at 0xbdb59668 -- is the count of remaining
marked objective targets, which is phase-1 progress itself. The old reframing
that the counter is not a roster was right, and this names what it is. It is
also the correct signal to watch for an advance: not deployed, which only
changes once the next phase deploys, but REMAINING OB reaching zero, which is
the cause.
Method lesson recorded because the reflex will recur: localization.rs has had
objectives, hints and lose_conditions for some time, and several iterations were
spent reconstructing the same information by hand from SUBObjective strings and
the guide script. The reconstruction was not wasted -- it produced the IXUD
UTF-16BE and language\ prefix findings independently -- but the corpus should
have been searched before the disc was, and grep -rl TextIndex crates/ would
have saved the detour.
Minor discrepancy noted, not investigated: ixud.rs documents the string pool as
UTF-16BE and localization.rs as UTF-16LE.
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