Part 1 (notes side): findings/objects/svsctob-variants.md records the two maps
that are nowhere on the wire and were read out of the game -- EncID -> class
from a 23-entry dword jump table at 0x0052bf60 indexed by EncID-1 (0x0052bf00),
and xscn -> class from an exhaustive four-way _stricmp chain at 0x005a7050.
Twelve live EncIDs, four scenario names, and "indsys" =
Game::SVSOIndependentSystems whose Read and Write are both the shared `ret 4`
stub at 0x005f8ac0, so its empty frame is correct output rather than a
truncation. Also: SVSOSots::Read accepts NPCPlr and hastraps, which Write never
emits -- read-only backward compatibility, not a hole in the recovery. And a
correction to the recovery itself: SVSOCrowDefenders writes `dsys` INSIDE the
ndsys loop; layouts.json calls it a plain member and no save can settle it
because both counts are 0 everywhere. 13 addresses in ghidra/addresses.d/
lane-w.json; gen_addresses.py merges to 640 with no duplicate name.
Part 2: lane G found four defects in both readers and deliberately did not
patch the oracle mid-campaign. Fixed now, with tests, and byte-neutral.
1. Game::SystemParams field 1 is a string, not an int (empty string == four
zero bytes == int 0, so it round-tripped by luck).
2. ObservedTech/ObservedWeapon odet is a bool, not an int (byte-safe only
because a 4-char tag makes both items 12 bytes; 3 chars would not).
3. SpeciesRatios nv is a count, not a field.
4. ShipRecords srbd is a count, not a field -- and this one is behaviourally
confirmed, not inferred: srbd takes 0, 1, 3 and 4 across the players and
every non-zero count is followed by exactly srbd x 5 scalars.
Note that 3 and 4 were an ABSENCE in save_reader.py, not an error: ShipRecs and
civr were both A(..., "any"), so the fix had to add the shapes rather than
retype a field.
Byte-neutrality: every item's inflated offset is unchanged on all four saves
(38,933 / 39,843 / 40,300 / 35,771 offsets, sequences identical), so no item
boundary moved. state_checksum.py still reports coverage: PROVED on all four
with the same rebuilt byte counts. The /CreateParams and /Sim/players digests do
change, because they hash typed VALUES and two fixes change what a value is --
and the value-byte deltas balance exactly: odet items x 3 plus p1 items x 4.
--strict exit 0 on all four saves; tests 36 -> 48.
findings/objects/wire-schema-closeout.md carries the whole account, including
the proof that CD/TurnCommands_v5 cannot be typed without a save that has
issued orders.
Reads: TechTree::PrereqsMet 0x0057d8e0 (AND of ORs; zero groups TRUE, an empty
group FALSE), the prerequisite layout at TechDef+0x88/+0x98, the tail collector
0x00587cc3, and the head of OnTechResearched (RecordObservedTech unconditional;
the research-event roll gated on ResT == def && ResearchRollPending).
Live: 35 compared calls over three workloads, 0 divergences, tracecmp exit 0,
End-Turn oracle hashes unchanged. The EVENT_TECHS_UNLOCKED residual lane P
predicted and lane V measured is closed by running the cascade, not by posting
on completion.
12 new addresses in ghidra/addresses.d/lane-u.json (header 615 -> 627).
