Campaign VT slice 1 Part A, per the owner's 2026-09-06 "MossTank does not
implement .met and does not author .nav" direction: .af (MetafSerializer)
is now the only storage/authoring format for meta profiles and navigation
routes. Deletes both classes' Save() writers and every writer-only helper
(WriteCondition/WriteAction/WriteEmbeddedNavigation/ConditionType/ActionType/
Number/IntValue/LineWriter in VtankMetaProfileSerializer; WriteWaypoint/
WriteDouble in VtankNavRouteSerializer) - TryLoad and its read-path helpers
are untouched, so a real binary .met/.nav still imports one-shot into the
in-memory model.
MetaEngine's LoadEmbeddedNavigationRoute still needs the "uTank2 NAV 1.2"
in-memory blob shape for a resolved EmbedNav action (that's a MossTank
runtime contract, not a VTank file on disk), so MetafSerializer gained its
own small private WriteBinaryNavBlob - a deliberate, scoped duplicate of
what used to be VtankNavRouteSerializer.Save's WriteWaypoint, kept
independent of the now-import-only class.
MossTankMetaProfileStore/MossTankRouteProfileStore's WriteLegacyExport
(the "/vt meta save"/"/vt nav save" sidecar) now writes .af via
MetafSerializer.SaveMeta/SaveNav instead of the deleted binary writers.
This is a real, if partial, step toward the contract's ".af is the only
storage/authoring format" goal - full profile-directory-backed .af storage
(A2's VTank-naming-scheme directory) is separate follow-up work, noted in
the closeout.
Deletes VtankMetaProfileSerializerTests.cs entirely (it only tested the
now-deleted Save/round-trip behavior); trims the two writer-only tests out
of VtankNavRouteSerializerTests.cs, keeping every reader test intact
(LoadsEveryOfficialNav12WaypointPayload's read assertions,
LoadsEmbeddedWrapperAndDoesNotMutateOnFailure). Updates
MossTankPanelTests.cs's two "/vt meta|nav save" integration tests for the
new .af export path (the meta test's synthetic import fixture is now a
hand-authored CondAct payload instead of a call to the deleted Save).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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