feedback5 R4: content/index.js takes the kit registry from kits/index.js (one guarded import per kit file) instead of loading the six tier shims; KITS is the same object kits/index.js exports — same keys, order and builders, golden unchanged

server/sim/content/index.js

@@ -1,7 +1,7 @@
 // server/sim/content/index.js — installs all content into a Battle (DESIGN §7).
 //
 // installContent(battle, { mode }) — applies the per-battle loadout data view (simdata withUnitLoadouts; DESIGN §16),
-//   then mode 'full' (default): hand-authored kits (kits/tier1..6) with generic
+//   then mode 'full' (default): hand-authored kits (kits/index.js: one file per kit in kits/ops/) with generic
 //   fallback + every domain module's install(battle); 'generic': generic kits only, no domain modules;
 //   'none': no kits (units never cast skills) and no modules. Every module install runs inside try/catch:
 //   a faulty content module is logged and skipped, never crashing the battle.
@@ -33,13 +33,13 @@ async function safeImport(path) {
   }
 }
 
-const TIERS = await Promise.all([1, 2, 3, 4, 5, 6].map((t) => safeImport(`./kits/tier${t}.js`)));
+const KIT_REGISTRY = await safeImport('./kits/index.js');
 const DOMAIN_NAMES = ['tokens', 'devices', 'enemies', 'bosses', 'bonds', 'garrisons', 'items', 'bands', 'choices'];
 const DOMAINS = await Promise.all(DOMAIN_NAMES.map((n) => safeImport(`./${n}.js`)));
 const tokens = DOMAINS[0];
 
-/** Merged kit registry: baseChessId → (bb, chess, def) => Kit */
-export const KITS = Object.freeze(Object.assign({}, ...TIERS.map((m) => (m && m.default && typeof m.default === 'object' ? m.default : {}))));
+/** Merged kit registry: baseChessId → (bb, chess, def) => Kit (kits/index.js; each kit file is loaded guarded too) */
+export const KITS = KIT_REGISTRY.KITS ?? Object.freeze({});
 
 /** Domain modules in install order: tokens, devices, enemies, bosses, bonds, garrisons, items, bands, choices. */
 export const MODULES = Object.freeze(DOMAIN_NAMES.map((n, i) => [n, DOMAINS[i]]));