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_2_17-branch.js

@@ -0,0 +1,46 @@
+// server/sim/content/kits/ops/chess_char_2_17-branch.js — 折桠 (char_4207_branch) kit, tier 2.
+// Conventions of the tier-2 kits: ../shared/tier2.js; kit contract and rules: ../README.md.
+
+import { num, talentBb, traitBb, onHitOn, enemiesInGrid } from '../shared/tier1.js';
+
+export default {
+  // ---------------------------------------------------------------------------------------------------------------
+  // 2_17 折桠 生存决心: on start, ground enemies around her (skill grid) 战栗 (tremble: "被阻挡后无法进行普通攻击") for
+  // not_combat s; ATK +atk, DEF +def, hits every blocked enemy. 简易包扎: heals hp_ratio × max HP when the skill ends.
+  // Elite module (UNY-X, trait damage_scale): damage from enemies she blocks ×damage_scale.
+  // S1 绝境抵抗 (alt, TAKE_DAMAGE / hurt SP from data): DEF +def and 抵抗 (−one_minus_status_resistance: control
+  // statuses last half as long) for its duration; 简易包扎 heals at its end too.
+  chess_char_2_17_a: (bb, chess, def) => {
+    const t = talentBb(chess, 0);
+    const tb = traitBb(chess);
+    return {
+      skill: {
+        kind: 'duration', mods: { atkPct: num(bb.atk), defPct: num(bb.def) }, attack: { hitAllBlocked: true },
+        onStart({ battle, unit }) {
+          const grid = def?.skill?.rangeGrid;
+          const foes = grid ? enemiesInGrid(battle, unit, grid, { canHitFly: false, groundOnly: true }) : battle.foesInRadius(unit.x, unit.y, 1.5).filter((e) => !e.isFlying);
+          battle.fx('aoe', { x: unit.x, y: unit.y, radius: 1.5, id: unit.id, skill: 'resolve' });
+          for (const e of foes) battle.applyStatus(e, 'tremble', { duration: num(bb.not_combat), source: unit });
+        },
+      },
+      skills: {
+        skchr_branch_1: {
+          kind: 'duration', mods: { defPct: num(bb.def) },
+          onStart({ battle, unit, skill }) {
+            const v = Math.min(0.95, Math.max(0, -num(bb.one_minus_status_resistance)));
+            if (v > 0) battle.applyStatus(unit, 'resist', { duration: skill.timeLeft, value: v, source: unit });
+          },
+        },
+      },
+      talents: [{ install(battle, unit) {
+        const hr = num(t.hp_ratio);
+        if (hr > 0) {
+          battle.on('skillEnd', ({ unit: u, reason }) => {
+            if (u === unit && reason !== 'death' && unit.alive) battle.heal(unit, unit, unit.s.maxHp * hr, { self: true, tags: ['talent'] });
+          }, { owner: unit });
+        }
+        if (tb.damage_scale != null) onHitOn(battle, unit, ({ source, dmg }) => { if (source && source.blockedBy === unit) dmg.mul *= num(tb.damage_scale, 1); });
+      } }],
+    };
+  },
+};