diff --git a/prisma/migrations/20260521_adjustment_reason_category_enum_description/migration.sql b/prisma/migrations/20260521_adjustment_reason_category_enum_description/migration.sql
new file mode 100644
index 0000000..3080c05
--- /dev/null
+++ b/prisma/migrations/20260521_adjustment_reason_category_enum_description/migration.sql
@@ -0,0 +1,8 @@
+CREATE TYPE "AdjustmentReasonCategory" AS ENUM ('SHRINKAGE', 'DAMAGE', 'REGRADE', 'ADJUSTMENT');
+
+ALTER TABLE "adjustment_reasons"
+ADD COLUMN "description" VARCHAR(255);
+
+ALTER TABLE "adjustment_reasons"
+ALTER COLUMN "category" TYPE "AdjustmentReasonCategory"
+USING ("category"::"AdjustmentReasonCategory");
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index f4ee44a..a240c47 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -8,6 +8,13 @@ datasource db {
   url      = env("DATABASE_URL")
 }
 
+enum AdjustmentReasonCategory {
+  SHRINKAGE
+  DAMAGE
+  REGRADE
+  ADJUSTMENT
+}
+
 model Role {
   id        BigInt   @id @default(autoincrement())
   code      String   @unique @db.VarChar(50)
@@ -486,7 +493,8 @@ model AdjustmentReason {
   id               BigInt            @id @default(autoincrement())
   code             String            @unique @db.VarChar(50)
   name             String            @db.VarChar(100)
-  category         String            @db.VarChar(50)
+  description      String?           @db.VarChar(255)
+  category         AdjustmentReasonCategory
   status           String            @default("ACTIVE") @db.VarChar(20)
   createdAt        DateTime          @default(now()) @map("created_at")
   updatedAt        DateTime          @updatedAt @map("updated_at")
diff --git a/src/app/api/v1/adjustment-reasons/[id]/route.ts b/src/app/api/v1/adjustment-reasons/[id]/route.ts
index 64cab5a..99ea487 100644
--- a/src/app/api/v1/adjustment-reasons/[id]/route.ts
+++ b/src/app/api/v1/adjustment-reasons/[id]/route.ts
@@ -66,6 +66,7 @@ export async function PUT(request: Request, context: RouteContext) {
       data: {
         code: resolvedCode.code,
         name: parsed.data.name,
+        description: parsed.data.description || null,
         category: parsed.data.category,
         status: parsed.data.status
       }
@@ -83,12 +84,14 @@ export async function PUT(request: Request, context: RouteContext) {
         {
           code: existing.code,
           name: existing.name,
+          description: existing.description,
           category: existing.category,
           status: existing.status
         },
         {
           code: reason.code,
           name: reason.name,
+          description: reason.description,
           category: reason.category,
           status: reason.status
         }
diff --git a/src/app/api/v1/adjustment-reasons/route.ts b/src/app/api/v1/adjustment-reasons/route.ts
index e199b72..a50e323 100644
--- a/src/app/api/v1/adjustment-reasons/route.ts
+++ b/src/app/api/v1/adjustment-reasons/route.ts
@@ -45,6 +45,7 @@ export async function POST(request: Request) {
       data: {
         code: resolvedCode.code,
         name: parsed.data.name,
+        description: parsed.data.description || null,
         category: parsed.data.category,
         status: parsed.data.status
       }
diff --git a/src/app/api/v1/mobile/stock-adjustments/bootstrap/route.ts b/src/app/api/v1/mobile/stock-adjustments/bootstrap/route.ts
index 7565372..14d8741 100644
--- a/src/app/api/v1/mobile/stock-adjustments/bootstrap/route.ts
+++ b/src/app/api/v1/mobile/stock-adjustments/bootstrap/route.ts
@@ -18,6 +18,7 @@ export async function GET(request: Request) {
         id: reason.id.toString(),
         code: reason.code,
         name: reason.name,
+        description: reason.description,
         category: reason.category
       }))
     }
diff --git a/src/app/api/v1/stock-adjustments/route.ts b/src/app/api/v1/stock-adjustments/route.ts
index 27380ab..0680358 100644
--- a/src/app/api/v1/stock-adjustments/route.ts
+++ b/src/app/api/v1/stock-adjustments/route.ts
@@ -118,13 +118,13 @@ export async function POST(request: Request) {
       status: after <= 0 ? "DEPLETED" : "ACTIVE"
     };
 
-    if (parsed.data.qty_change < 0 && reason.category.toUpperCase() === "SHRINKAGE") {
+    if (parsed.data.qty_change < 0 && reason.category === "SHRINKAGE") {
       lotUpdate.shrinkageQty = new Prisma.Decimal(
         Number((lot.shrinkageQty.toNumber() + absChange).toFixed(3))
       );
     }
 
-    if (parsed.data.qty_change < 0 && reason.category.toUpperCase() === "DAMAGE") {
+    if (parsed.data.qty_change < 0 && reason.category === "DAMAGE") {
       lotUpdate.damagedQty = new Prisma.Decimal(
         Number((lot.damagedQty.toNumber() + absChange).toFixed(3))
       );
diff --git a/src/components/master-data/adjustment-reasons-client.tsx b/src/components/master-data/adjustment-reasons-client.tsx
index e9e8173..e871636 100644
--- a/src/components/master-data/adjustment-reasons-client.tsx
+++ b/src/components/master-data/adjustment-reasons-client.tsx
@@ -4,25 +4,39 @@ import { FormEvent, useEffect, useMemo, useState } from "react";
 
 import { useLocale } from "@/components/providers/locale-provider";
 import { PaginationFooter } from "@/components/shared/pagination-footer";
-import { useCurrentUser } from "@/hooks/use-current-user";
 import { usePagination } from "@/hooks/use-pagination";
 import type { ApiErrorResponse, DetailResponse } from "@/types/api";
-import type { AdjustmentReasonRecord, MasterStatus } from "@/types/master-data";
+import type {
+  AdjustmentReasonCategory,
+  AdjustmentReasonRecord,
+  MasterStatus
+} from "@/types/master-data";
 
 type FormValues = {
-  code: string;
   name: string;
-  category: string;
+  description: string;
+  category: AdjustmentReasonCategory;
   status: MasterStatus;
 };
 
 const emptyForm: FormValues = {
-  code: "",
   name: "",
-  category: "",
+  description: "",
+  category: "ADJUSTMENT",
   status: "ACTIVE"
 };
 
+const categoryOptions: Array<{ value: AdjustmentReasonCategory; label: string }> = [
+  { value: "ADJUSTMENT", label: "Penyesuaian / Adjustment" },
+  { value: "SHRINKAGE", label: "Penyusutan / Shrinkage" },
+  { value: "DAMAGE", label: "Kerusakan / Damage" },
+  { value: "REGRADE", label: "Regrade / Regrade" }
+];
+
+function getCategoryLabel(category: AdjustmentReasonCategory) {
+  return categoryOptions.find((option) => option.value === category)?.label ?? category;
+}
+
 export function AdjustmentReasonsClient() {
   const { dict } = useLocale();
   const [items, setItems] = useState<AdjustmentReasonRecord[]>([]);
@@ -32,14 +46,18 @@ export function AdjustmentReasonsClient() {
   const [loading, setLoading] = useState(true);
   const [submitting, setSubmitting] = useState(false);
   const [error, setError] = useState<string | null>(null);
-  const { canEditCode } = useCurrentUser();
+
   const filteredItems = useMemo(() => {
     const keyword = search.trim().toLowerCase();
     if (!keyword) return items;
+
     return items.filter((item) =>
-      [item.code, item.name, item.category].some((value) => value.toLowerCase().includes(keyword))
+      [item.code, item.name, item.description ?? "", item.category].some((value) =>
+        value.toLowerCase().includes(keyword)
+      )
     );
   }, [items, search]);
+
   const pagination = usePagination(filteredItems, 20);
 
   async function loadItems() {
@@ -70,8 +88,8 @@ export function AdjustmentReasonsClient() {
   function startEdit(item: AdjustmentReasonRecord) {
     setEditingId(item.id);
     setForm({
-      code: item.code,
       name: item.name,
+      description: item.description ?? "",
       category: item.category,
       status: item.status as MasterStatus
     });
@@ -82,17 +100,20 @@ export function AdjustmentReasonsClient() {
     event.preventDefault();
     setSubmitting(true);
     setError(null);
+
     try {
       const response = await fetch(
         editingId ? `/api/v1/adjustment-reasons/${editingId}` : "/api/v1/adjustment-reasons",
         {
           method: editingId ? "PUT" : "POST",
           headers: { "Content-Type": "application/json" },
-          body: JSON.stringify(form)
+          body: JSON.stringify({ ...form, code: "" })
         }
       );
+
       const payload =
         (await response.json()) as DetailResponse<AdjustmentReasonRecord> | ApiErrorResponse;
+
       if (!response.ok) {
         if ("errors" in payload && payload.errors) {
           const firstError = Object.values(payload.errors)[0]?.[0];
@@ -100,6 +121,7 @@ export function AdjustmentReasonsClient() {
         }
         throw new Error("message" in payload ? payload.message : dict.common.requestFailed);
       }
+
       resetForm();
       await loadItems();
     } catch (err) {
@@ -111,6 +133,7 @@ export function AdjustmentReasonsClient() {
 
   async function handleDelete(id: string) {
     if (!window.confirm(`${dict.common.delete} adjustment reason ini?`)) return;
+
     try {
       const response = await fetch(`/api/v1/adjustment-reasons/${id}`, {
         method: "DELETE"
@@ -142,29 +165,52 @@ export function AdjustmentReasonsClient() {
             </p>
           </div>
           {editingId ? (
-            <button type="button" onClick={resetForm} className="ops-btn-secondary">{dict.common.cancelEdit}</button>
+            <button type="button" onClick={resetForm} className="ops-btn-secondary">
+              {dict.common.cancelEdit}
+            </button>
           ) : null}
         </div>
         <form className="mt-6 space-y-4" onSubmit={handleSubmit}>
           <div className="grid gap-4 md:grid-cols-2">
-            <Field
-              label={dict.master.code}
-              value={form.code}
-              readOnly={!canEditCode}
-              placeholder={canEditCode ? "ADJ00001" : "Auto"}
-              onChange={(value) => setForm((current) => ({ ...current, code: value }))}
-            />
             <Field
               label={dict.master.name}
               value={form.name}
               onChange={(value) => setForm((current) => ({ ...current, name: value }))}
             />
-            <Field
-              label="Kategori"
-              value={form.category}
-              onChange={(value) => setForm((current) => ({ ...current, category: value }))}
-            />
+            <label className="block">
+              <span className="ops-label">Kategori</span>
+              <select
+                value={form.category}
+                onChange={(event) =>
+                  setForm((current) => ({
+                    ...current,
+                    category: event.target.value as AdjustmentReasonCategory
+                  }))
+                }
+                className="ops-select"
+              >
+                {categoryOptions.map((option) => (
+                  <option key={option.value} value={option.value}>
+                    {option.label}
+                  </option>
+                ))}
+              </select>
+            </label>
           </div>
+
+          <label className="block">
+            <span className="ops-label">{dict.master.description}</span>
+            <textarea
+              value={form.description}
+              onChange={(event) =>
+                setForm((current) => ({ ...current, description: event.target.value }))
+              }
+              rows={4}
+              className="ops-textarea"
+              placeholder="Penjelasan kapan alasan ini dipakai"
+            />
+          </label>
+
           <label className="block">
             <span className="ops-label">{dict.master.status}</span>
             <select
@@ -181,11 +227,13 @@ export function AdjustmentReasonsClient() {
               <option value="INACTIVE">{dict.master.inactive}</option>
             </select>
           </label>
+
           {error ? (
             <div className="rounded border border-ember/30 bg-ember/10 px-4 py-3 text-sm text-ember">
               {error}
             </div>
           ) : null}
+
           <button type="submit" disabled={submitting} className="ops-btn-primary">
             {submitting
               ? dict.common.processing
@@ -195,6 +243,7 @@ export function AdjustmentReasonsClient() {
           </button>
         </form>
       </div>
+
       <div className="ops-table-shell">
         <div className="ops-section-head">
           <div>
@@ -205,6 +254,7 @@ export function AdjustmentReasonsClient() {
             {items.length} {dict.master.dataCount}
           </div>
         </div>
+
         {!loading && items.length > 0 ? (
           <div className="border-t border-line/70 px-6 py-4">
             <label className="block">
@@ -212,18 +262,17 @@ export function AdjustmentReasonsClient() {
               <input
                 value={search}
                 onChange={(event) => setSearch(event.target.value)}
-                placeholder="Cari kode, nama, atau kategori..."
+                placeholder="Cari kode, nama, deskripsi, atau kategori..."
                 className="ops-input"
               />
             </label>
           </div>
         ) : null}
+
         {loading ? (
           <div className="px-6 py-8 text-sm text-ink/60">{dict.common.loading}</div>
         ) : items.length === 0 ? (
-          <div className="px-6 py-8 text-sm text-ink/60">
-            {dict.master.noData}
-          </div>
+          <div className="px-6 py-8 text-sm text-ink/60">{dict.master.noData}</div>
         ) : filteredItems.length === 0 ? (
           <div className="px-6 py-8 text-sm text-ink/60">
             Tidak ada alasan penyesuaian yang cocok dengan pencarian.
@@ -236,6 +285,7 @@ export function AdjustmentReasonsClient() {
                   <tr>
                     <th>{dict.master.code}</th>
                     <th>{dict.master.name}</th>
+                    <th>{dict.master.description}</th>
                     <th>Kategori</th>
                     <th>{dict.master.status}</th>
                     <th>{dict.common.actions}</th>
@@ -246,16 +296,35 @@ export function AdjustmentReasonsClient() {
                     <tr key={item.id}>
                       <td className="font-semibold text-ink">{item.code}</td>
                       <td>{item.name}</td>
-                      <td className="text-slate-600">{item.category}</td>
+                      <td className="text-slate-600">{item.description || "-"}</td>
+                      <td className="text-slate-600">{getCategoryLabel(item.category)}</td>
                       <td>
-                        <span className={item.status === "INACTIVE" ? "ops-chip-danger" : "ops-chip-active"}>
-                          {item.status === "INACTIVE" ? dict.master.inactive : dict.master.active}
+                        <span
+                          className={
+                            item.status === "INACTIVE" ? "ops-chip-danger" : "ops-chip-active"
+                          }
+                        >
+                          {item.status === "INACTIVE"
+                            ? dict.master.inactive
+                            : dict.master.active}
                         </span>
                       </td>
                       <td>
                         <div className="flex gap-2">
-                          <button type="button" onClick={() => startEdit(item)} className="ops-btn-secondary">{dict.common.edit}</button>
-                          <button type="button" onClick={() => void handleDelete(item.id)} className="ops-btn-danger">{dict.common.delete}</button>
+                          <button
+                            type="button"
+                            onClick={() => startEdit(item)}
+                            className="ops-btn-secondary"
+                          >
+                            {dict.common.edit}
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => void handleDelete(item.id)}
+                            className="ops-btn-danger"
+                          >
+                            {dict.common.delete}
+                          </button>
                         </div>
                       </td>
                     </tr>
@@ -271,7 +340,9 @@ export function AdjustmentReasonsClient() {
               totalItems={pagination.totalItems}
               itemLabel="adjustment reason"
               onPrev={() => pagination.setPage((page) => Math.max(1, page - 1))}
-              onNext={() => pagination.setPage((page) => Math.min(pagination.totalPages, page + 1))}
+              onNext={() =>
+                pagination.setPage((page) => Math.min(pagination.totalPages, page + 1))
+              }
             />
           </>
         )}
@@ -284,13 +355,11 @@ function Field({
   label,
   value,
   onChange,
-  readOnly = false,
   placeholder
 }: {
   label: string;
   value: string;
   onChange: (value: string) => void;
-  readOnly?: boolean;
   placeholder?: string;
 }) {
   return (
@@ -298,7 +367,6 @@ function Field({
       <span className="ops-label">{label}</span>
       <input
         value={value}
-        readOnly={readOnly}
         placeholder={placeholder}
         onChange={(event) => onChange(event.target.value)}
         className="ops-input"
diff --git a/src/features/adjustment-reasons/lib/serialize-adjustment-reason.ts b/src/features/adjustment-reasons/lib/serialize-adjustment-reason.ts
index 72bdb58..c9ba42e 100644
--- a/src/features/adjustment-reasons/lib/serialize-adjustment-reason.ts
+++ b/src/features/adjustment-reasons/lib/serialize-adjustment-reason.ts
@@ -4,7 +4,8 @@ type SerializableAdjustmentReason = {
   id: bigint;
   code: string;
   name: string;
-  category: string;
+  description: string | null;
+  category: AdjustmentReasonRecord["category"];
   status: string;
   createdAt: Date;
   updatedAt: Date;
@@ -17,6 +18,7 @@ export function serializeAdjustmentReason(
     id: reason.id.toString(),
     code: reason.code,
     name: reason.name,
+    description: reason.description,
     category: reason.category,
     status: reason.status,
     created_at: reason.createdAt.toISOString(),
diff --git a/src/features/adjustment-reasons/schemas/adjustment-reason.schema.ts b/src/features/adjustment-reasons/schemas/adjustment-reason.schema.ts
index a05e9c3..d68070c 100644
--- a/src/features/adjustment-reasons/schemas/adjustment-reason.schema.ts
+++ b/src/features/adjustment-reasons/schemas/adjustment-reason.schema.ts
@@ -1,8 +1,16 @@
 import { z } from "zod";
 
+const adjustmentReasonCategorySchema = z.enum([
+  "SHRINKAGE",
+  "DAMAGE",
+  "REGRADE",
+  "ADJUSTMENT"
+]);
+
 export const adjustmentReasonInputSchema = z.object({
   code: z.string().trim().max(50).optional().or(z.literal("")),
   name: z.string().trim().min(1, "Nama alasan wajib diisi").max(100),
-  category: z.string().trim().min(1, "Category wajib diisi").max(50),
+  description: z.string().trim().max(255).optional().or(z.literal("")),
+  category: adjustmentReasonCategorySchema,
   status: z.enum(["ACTIVE", "INACTIVE"]).default("ACTIVE")
 });
diff --git a/src/features/stock-adjustments/components/stock-adjustments-client.tsx b/src/features/stock-adjustments/components/stock-adjustments-client.tsx
index d3b6664..c6701d1 100644
--- a/src/features/stock-adjustments/components/stock-adjustments-client.tsx
+++ b/src/features/stock-adjustments/components/stock-adjustments-client.tsx
@@ -26,6 +26,13 @@ const emptyForm = (): StockAdjustmentForm => ({
   notes: ""
 });
 
+const adjustmentReasonCategoryLabels: Record<AdjustmentReasonRecord["category"], string> = {
+  ADJUSTMENT: "Penyesuaian / Adjustment",
+  SHRINKAGE: "Penyusutan / Shrinkage",
+  DAMAGE: "Kerusakan / Damage",
+  REGRADE: "Regrade / Regrade"
+};
+
 export function StockAdjustmentsClient() {
   const { dict, locale } = useLocale();
   const [items, setItems] = useState<StockAdjustmentListItem[]>([]);
@@ -167,14 +174,24 @@ export function StockAdjustmentsClient() {
             }
             options={reasons.map((reason) => ({
               value: reason.id,
-              label: `${reason.code} - ${reason.name} (${reason.category})`
+              label: `${reason.code} - ${reason.name} (${adjustmentReasonCategoryLabels[reason.category]})`
             }))}
             placeholder={dict.stockAdjustments.chooseReason}
           />
 
           {selectedReason ? (
             <div className="rounded border border-line/70 bg-slate-50 px-4 py-4 text-sm text-slate-600">
-              {dict.stockAdjustments.category}: <span className="font-medium text-ink">{selectedReason.category}</span>
+              <div>
+                {dict.stockAdjustments.category}:{" "}
+                <span className="font-medium text-ink">
+                  {adjustmentReasonCategoryLabels[selectedReason.category]}
+                </span>
+              </div>
+              {selectedReason.description ? (
+                <div className="mt-2 text-xs leading-5 text-slate-500">
+                  {selectedReason.description}
+                </div>
+              ) : null}
             </div>
           ) : null}
 
@@ -261,7 +278,14 @@ export function StockAdjustmentsClient() {
                     </td>
                     <td className="text-slate-600">
                       {item.reason.name}
-                      <div className="mt-1 text-xs text-slate-500">{item.reason.category}</div>
+                      <div className="mt-1 text-xs text-slate-500">
+                        {adjustmentReasonCategoryLabels[item.reason.category]}
+                      </div>
+                      {item.reason.description ? (
+                        <div className="mt-1 text-xs leading-5 text-slate-500">
+                          {item.reason.description}
+                        </div>
+                      ) : null}
                     </td>
                     <td className={item.qty_change < 0 ? "text-ember" : "text-moss"}>
                       {item.qty_change > 0 ? "+" : ""}
diff --git a/src/features/stock-adjustments/lib/serialize-stock-adjustment.ts b/src/features/stock-adjustments/lib/serialize-stock-adjustment.ts
index 0532402..5448a4b 100644
--- a/src/features/stock-adjustments/lib/serialize-stock-adjustment.ts
+++ b/src/features/stock-adjustments/lib/serialize-stock-adjustment.ts
@@ -20,7 +20,8 @@ type SerializableStockAdjustment = {
     id: bigint;
     code: string;
     name: string;
-    category: string;
+    description: string | null;
+    category: StockAdjustmentListItem["reason"]["category"];
   };
   createdBy: {
     id: bigint;
@@ -46,6 +47,7 @@ export function serializeStockAdjustment(
       id: item.adjustmentReason.id.toString(),
       code: item.adjustmentReason.code,
       name: item.adjustmentReason.name,
+      description: item.adjustmentReason.description,
       category: item.adjustmentReason.category
     },
     qty_change: item.qtyChange.toNumber(),
diff --git a/src/types/master-data.ts b/src/types/master-data.ts
index 4bec04a..2c0f322 100644
--- a/src/types/master-data.ts
+++ b/src/types/master-data.ts
@@ -1,4 +1,5 @@
 export type MasterStatus = "ACTIVE" | "INACTIVE";
+export type AdjustmentReasonCategory = "SHRINKAGE" | "DAMAGE" | "REGRADE" | "ADJUSTMENT";
 
 export type GradePriceStandardRecord = {
   id: string;
@@ -49,7 +50,8 @@ export type AdjustmentReasonRecord = {
   id: string;
   code: string;
   name: string;
-  category: string;
+  description: string | null;
+  category: AdjustmentReasonCategory;
   status: string;
   created_at: string;
   updated_at: string;
diff --git a/src/types/stock-adjustment.ts b/src/types/stock-adjustment.ts
index 2e6ff01..7d7be82 100644
--- a/src/types/stock-adjustment.ts
+++ b/src/types/stock-adjustment.ts
@@ -1,3 +1,5 @@
+import type { AdjustmentReasonCategory } from "@/types/master-data";
+
 export type StockAdjustmentListItem = {
   id: string;
   adjustment_no: string;
@@ -12,7 +14,8 @@ export type StockAdjustmentListItem = {
     id: string;
     code: string;
     name: string;
-    category: string;
+    description: string | null;
+    category: AdjustmentReasonCategory;
   };
   qty_change: number;
   available_qty_before: number;