feedback5 R4: one file per operator kit — kits/tier1..6.js split into kits/ops/<chessId>-<codename>.js (129 kits), kits/shared/tier1..6.js (the helpers two or more kits of a tier use, and each tier's header notes) and kits/index.js (the registry, same keys in the same order); the tier files become re-export shims

Pure move: every line of a kit, of a helper and of the tier headers is copied verbatim (only the headers' first
line names the new file); a helper used by one kit moved into that kit's file. Glue only: the generated imports,
`export default { … }` around each registry entry, `export { … }` lists in shared/tier2..6.js, and tier4's
`(bb, chess, def)` default-argument wrapper as shared/tier4.js `withDefaults` (applied in each tier-4 kit file).
kits/index.js loads every kit file with a guarded dynamic import (browser-safe, no directory listing); tierN.js
re-export the tier registry (TIER_KITS) and their old named exports (tier1 helpers + tinmanKit, tier6
PITHST_ELEMENTS). The merged registry, every tier default and named export have the same keys, order, frozenness
and function sources as before. test/docs-consistency.test.js reads the moved code at its new paths.
Golden: GOLDEN_FULL=1 node --test test/golden.test.js unchanged.

server/sim/content/kits/ops/chess_char_4_11-cathy.js

@@ -0,0 +1,38 @@
+// server/sim/content/kits/ops/chess_char_4_11-cathy.js — 凯瑟琳 (char_4162_cathy) kit, tier 4.
+// Conventions of the tier-4 kits: ../shared/tier4.js; kit contract and rules: ../README.md.
+
+import { CAT_SHIELD_KEY } from '../../tokens.js';
+import { AURA, num, whileDeployed, pulse, alt, withDefaults } from '../shared/tier4.js';
+
+export default withDefaults({
+  // ===== 凯瑟琳 (craftsman) S2 战火淬炼 — stops attacking, HP/DEF up, devices give 6 %/s shields; talent 定向支援信号
+  //       "携带3个支援装置（最多部署2个）": the 爬行号·防护单元 are hand pieces (2 = the deploy limit) the player places and
+  //       turns towards an operator (user playtest #6, PRTS 卫戍协议/帮助 §战斗部署); they deploy with the board and the
+  //       token kit (tokens.js catShield) gives the shields — S2 overwrite_ratio per second while this skill runs — so
+  //       this kit places nothing (none placed ⇒ no device).
+  //       S1 岁月锻打 (passive: she and every other operator holding a device shield ATK/DEF +8 %/+11 %); module CRA-X
+  //       carries one more device (talent cnt, data — a spare the hand never shows)
+  chess_char_4_11_a: (bb, chess, def) => ({
+    skills: alt(def, {
+      skchr_cathy_1: () => ({
+        kind: 'passive',
+        mods: { atkPct: num(bb.s1_atk), defPct: num(bb.s1_def) },
+        onStart({ battle, unit }) {
+          unit.mem.forgeAura?.cancel();
+          unit.mem.forgeAura = whileDeployed(battle, unit, AURA, () => {
+            for (const a of battle.allies(unit.ownerId)) {
+              if (a === unit || a.kind !== 'op' || !a.findBuff(CAT_SHIELD_KEY)) continue;
+              pulse(battle, a, `cathy:forge:${unit.id}`, { atkPct: num(bb.s1_atk), defPct: num(bb.s1_def) });
+            }
+          });
+        },
+      }),
+    }),
+    skill: {
+      kind: 'duration',
+      mods: { hpPct: num(bb.max_hp), defPct: num(bb.def) },
+      attack: { noAttack: true },
+      onStart({ battle, unit }) { battle.fx('overclock', { x: unit.x, y: unit.y, id: unit.id }); },
+    },
+  }),
+});