Step 6 of multi-instancing migration. HeadlessEngineEnv.EnsureInitialized
is split into EnsureProcessGlobals (idempotent, process-once) +
SeedCharaIdsOnCurrentAmbient (per-test). New TestBattleScope IDisposable
sets up a fresh BattleAmbientContext per test. NonParallelizable removed
from converted classes; assembly-level Parallelizable(Fixtures) enabled.
SVSim.BattleEngine.Tests fully green under parallel test execution.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
A when_play damage=5 spell (the M6 card 800134020) played at a select_count=1
enemy follower with life <= 5 kills it as a consequence of damage -> life <= 0 ->
the dead-check + the same RemoveInplayCard/cemetery path M7 lit up (the dominant
real-card removal mechanic), reached through combat math rather than `destroy`.
Oracle LethalDamageSpellOracleTests: selected follower (1/2) removed (board -1 +
cemetery +1, the M7 dimension); un-selected control (6/7, life > 5) untouched and
still on board (M6 routing; select_count=1 hits only the selected target). 8/8
green; engine 0 errors; check_drift clean; ZERO new Engine/shim/manifest work —
the death path inherited M7's death-voice fix; the predicted damage-VFX shadow
never materialized.
Load-bearing (M4/M6 discipline): swapping the selection to the 6/7 -> it survives
at 2 and nobody dies, proving removal is gated on the SELECTED follower's life
reaching <= 0, not on selection (M7's destroy) or a blanket wipe.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
