Verified by symbol at HEAD 52175aa1, behind two exhaustive caller censuses
(legacy placement writers; the probe family).
DELETION INVENTORY: 6 deletable symbol groups (~540 production lines), 2 more
deletable only via #275, and 5 that the plan or handoff names as deletable but
are NOT. Deletable now, all with zero production callers: PhysicsEngine.Resolve
(~360 lines — this IS AD-1's legacy demote/lift body) plus its private
HasCellSurface; PhysicsEngine.ResolvePlacement; PlayerMovementController
.SetPosition (both overloads); CommitPreparedPosition; the BeginAcceptedPlacement
/BeginAuthoredPlacement test wrappers. Hazard recorded: production
IsSpawnCellReady sits physically inside the Resolve block.
THE PLAN'S FRAMING IS WRONG FOR HALF THE ROWS. AP-1 and AD-1 are provably
retirable in the deletion commit — both rows' "production still routes through
the legacy resolver" sentences are already false at HEAD. But AP-131 and
AD-60's legacy half are blocked on #275, which is a BEHAVIOUR CHANGE
(classify-then-merge on every steady-state Position, retail Gate A, wire-cell
withhold across a 45+ site residency-predicate blast radius) — not a deletion.
"C5 deletes the paths and the rows retire" holds for two rows and not the
other two.
SEVEN TEST-ONLY-CALLER CASES, each with a disposition, because this is where a
deletion slice silently removes coverage: Resolve's unit tests (behaviour gone
— delete); Issue133DungeonTeleportPrefixTests (behaviour MOVED — re-point, it
is a named-bug regression pin); InitialPlacementOverlapTests and
TransitionScratchDifferentialTests (verify-then-delete / re-point the
differential arm); ~19 files using PlayerMovementController.SetPosition as
fixture setup (mechanical re-point); CommitPreparedPosition's tests (re-point
at the leash-arm replacement); the Begin* wrappers' ~40 sites (keep as a seam).
Also flagged: the #316-preserving test pins a defect verbatim and inverts by
design once measured.
THE CELL-LESS TRIGGER, ESTABLISHED BY READING rather than deferred to a live
session: pickup-then-drop. TryApplyPickup leaves an ACTIVE cell-0 record, and
ACE's drop sends that guid a bare UpdatePosition (Player_Inventory.cs:1443)
with no client-side delete. What remains unknown is only whether a CreateObject
from NotifyPlayers (Landblock.cs:900) precedes it on the ordered stream, which
depends on when ACE populates the fresh item's known-players set — a two-minute
probe run settles it, with route 5's "the gate cannot exist, record that" as
the honest fallback.
SEQUENCING: run the owed gates FIRST as one cheap user session on the current
binary (route-7 thickening, the cell-less falsification, #316's measurement),
then C5a (deletions + #318 + route-2's B2 parity test + retire AP-1/AD-1), then
C5b (#275 + AP-131/AD-60, own contract and dual review), then C5c (closeout
gates after #280 per the plan's own ordering, the ~1,340-line probe strip, the
ledger). The probe strip goes LAST because the owed gates depend on the probes,
with a REMOTE_LANDING carve-out if #316 stays unmeasured.
Seven false or stale plan claims found and listed, including AP-1/AD-1's own
row texts, ILocalPlayerTeleportPlacement being called deletable when it is a
live post-commit suffix, and the 4b "to delete" list being overtaken — the
pre-op ConstrainTo and duplicate constants are already gone and the remainder
is now canonical post-collapse.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Erik