The headless engine accumulates spell-charge for real on the receive path (each spell play runs the played card's own AddSpellChargeCount) and resolves the discounted cost by construction, so the wire-derived spellboost-count bookkeeping is redundant. Engine-source the knownList spellboost COUNT too (prod-faithful) via a new SessionBattleEngine.PlayedCardSpellboost, using the same persist-post-play zone search as PlayedCardCost (SpellChargeCount survives PlayCard; only ctor/ReturnCard zero it). - Delete IdxToSpellboost/SpellboostMap/GetSpellboostMap/RecordSpellboostFrom (BattleSessionState) and MineAlterSpellboosts (KnownListBuilder); token/choice/ copy identity maps are untouched. - BuildPlayedCard takes an engine-sourced spellboost int (drops spellboostMap). - Seed BattleLogManager fusion lists headless (the per-frame filter cleanup NREs on null EnemyFusionCard when a fanfare card registers a CalledCreateFilter) so real spell-charge grantor plays resolve. - Add committed real-charge regression tests (no SeedHandCardSpellboostCost seam): one grantor play accumulates +1 on the reducer -> cost 5->4, count 1, persisting post-play; handler emits cost 4 + spellboost 1 engine-sourced. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
SVSim.BattleNode
Socket.IO node-server emulation for in-battle real-time traffic — the second of prod's 4-server
topology. Handles Matched / BattleStart / Deal / per-action PlayActions / Echo /
TurnEnd between a client and a server-side opponent, for TK2 PvP and AI rank battles.
Documentation lives in the outer repo
This project's canonical reference is a single hub doc in the outer SVSim repo (this directory is an inner git repo, so the doc isn't tracked alongside the code):
→ docs/battle-node.md (from the SVSim root) — architecture, the dispatch matrix by battle
type, connect handshake + crypto, BattleFinish wire-result semantics, SIO/EIO event coverage,
reliability (pubSeq/playSeq/Gungnir), wire-format gotchas, where-to-extend, the manual smoke
walkthrough, and the consolidated open-items list.
Relative path from here: ../../../docs/battle-node.md.
Detailed per-URI wire shapes are in docs/api-spec/in-battle/; the hub links into them.
Keep docs/battle-node.md updated in the same change whenever you alter node behavior.