diff --git a/HANDOFF.md b/HANDOFF.md
index fab3946..28e8109 100644
--- a/HANDOFF.md
+++ b/HANDOFF.md
@@ -2,11 +2,11 @@
 
 Project: `ina-trading-web`
 Current branch: `main`
-Latest verified commit: `f090ba7`
+Latest verified commit: current `HEAD` after the product edit media-action payload update
 
 ## Summary
 
-This codebase has recent updates around auth/onboarding, help/privacy pages, dashboard search, product creation/edit/review/detail, admin review/detail, stock/price editing, seller in-review listing, backend request logging, expired-session redirects, product keyword limits, sanitized backend error display, AddProductRequest validation, and 10 MB upload limits.
+This codebase has recent updates around auth/onboarding, help/privacy pages, dashboard search, product creation/edit/review/detail, admin review/detail, stock/price editing, seller in-review listing, backend request logging, expired-session redirects, product keyword limits, sanitized backend error display, AddProductRequest validation, 10 MB upload limits, and edit-product media action payloads.
 
 Latest local verification before the newest push:
 
@@ -26,6 +26,46 @@ Latest TypeScript verification after the validation/upload changes:
 npx tsc --noEmit
 ```
 
+## Latest Codex Changes After `84c81d4`
+
+### Product edit media action payloads
+
+Files:
+- `src/app/(dashboard)/products/[productId]/edit/page.tsx`
+- `src/lib/product-request-validation.ts`
+
+Behavior:
+- Edit-product now captures the original product media snapshot when the product is loaded.
+- Existing product save (`PUT /api/products/:productId`) now sends media changes using backend action markers:
+  - `ADD`
+  - `UPDATE`
+  - `DELETE`
+- `productFiles` now sends:
+  - deleted original files as `{ fileId, action: "DELETE" }`
+  - newly uploaded files as `{ fileId, action: "ADD" }`
+- `productImages` now sends changed image rows with `{ imageId, sequence, action }`.
+  - replacing an image in an existing slot sends `UPDATE`
+  - removing an original image sends `DELETE`
+  - adding a new image sends `ADD`
+- `complianceInformation` now includes an `action` when the compliance/MSDS file changes:
+  - no old file + new file: `ADD`
+  - old file + no current file: `DELETE`
+  - old file replaced by new file: `UPDATE`
+- Draft publish/create flow still keeps the previous create payload shape so `POST /api/products/create` is not changed.
+- Product payload validation now supports both old `productFiles: string[]` and new `productFiles: { fileId, action }[]` shapes.
+
+Verification:
+
+```bash
+npx tsc --noEmit
+npx eslint 'src/app/(dashboard)/products/[productId]/edit/page.tsx' src/lib/product-request-validation.ts
+```
+
+Notes:
+- Targeted lint passed with no errors.
+- The edit page still has existing `<img>` optimization warnings from Next.js.
+- Full `npm run lint` is still blocked by pre-existing lint errors in unrelated files noted before this handoff update.
+
 ## Latest Codex Changes After `4e28ccd`
 
 ### Admin review image dedupe
diff --git a/src/app/(dashboard)/products/[productId]/edit/page.tsx b/src/app/(dashboard)/products/[productId]/edit/page.tsx
index 5b875a1..dae9af2 100644
--- a/src/app/(dashboard)/products/[productId]/edit/page.tsx
+++ b/src/app/(dashboard)/products/[productId]/edit/page.tsx
@@ -217,6 +217,14 @@ interface ApiProduct {
   } | null;
 }
 
+type MediaAction = "ADD" | "UPDATE" | "DELETE";
+
+interface OriginalMediaState {
+  productFiles: string[];
+  productImages: string[];
+  complianceFileId: string;
+}
+
 // ─── Helpers ──────────────────────────────────────────────────────────────────
 
 function getToken() {
@@ -468,6 +476,93 @@ function apiToEditState(data: ApiProduct): EditState {
 const MAX_IMAGES = 8;
 const inputCls = "w-full bg-surface-container-low rounded-xl border border-outline-variant/10 p-3.5 text-sm font-semibold focus:ring-2 focus:ring-primary/10 focus:outline-none";
 
+function normalizedProductImageIds(form: Pick<EditState, "imageId" | "productImages">) {
+  const productImageIds = form.productImages.filter(Boolean);
+  const hasMainImageInProductImages = Boolean(
+    form.imageId && productImageIds.includes(form.imageId)
+  );
+
+  return [
+    ...(hasMainImageInProductImages ? [] : [form.imageId]),
+    ...productImageIds,
+  ].filter(Boolean);
+}
+
+function captureOriginalMedia(form: EditState): OriginalMediaState {
+  return {
+    productFiles: form.productFiles.map((file) => file.id).filter(Boolean),
+    productImages: normalizedProductImageIds(form),
+    complianceFileId: form.complianceInformation.fileId,
+  };
+}
+
+function buildProductFileActions(originalIds: string[], currentFiles: EditState["productFiles"]) {
+  const currentIds = currentFiles.map((file) => file.id).filter(Boolean);
+  const currentSet = new Set(currentIds);
+  const originalSet = new Set(originalIds);
+
+  return [
+    ...originalIds
+      .filter((fileId) => !currentSet.has(fileId))
+      .map((fileId) => ({ fileId, action: "DELETE" as MediaAction })),
+    ...currentIds
+      .filter((fileId) => !originalSet.has(fileId))
+      .map((fileId) => ({ fileId, action: "ADD" as MediaAction })),
+  ];
+}
+
+function buildProductImageActions(originalIds: string[], currentIds: string[]) {
+  const originalSet = new Set(originalIds);
+  const usedCurrentIndexes = new Set<number>();
+  const actions: Array<{ imageId: string; sequence: number; action: MediaAction }> = [];
+
+  originalIds.forEach((originalImageId, index) => {
+    const currentImageId = currentIds[index];
+
+    if (currentImageId === originalImageId) {
+      usedCurrentIndexes.add(index);
+      return;
+    }
+
+    if (currentImageId && !originalSet.has(currentImageId)) {
+      actions.push({
+        imageId: currentImageId,
+        sequence: index + 1,
+        action: "UPDATE",
+      });
+      usedCurrentIndexes.add(index);
+      return;
+    }
+
+    if (!currentIds.includes(originalImageId)) {
+      actions.push({
+        imageId: originalImageId,
+        sequence: index + 1,
+        action: "DELETE",
+      });
+    }
+  });
+
+  currentIds.forEach((imageId, index) => {
+    if (usedCurrentIndexes.has(index) || originalSet.has(imageId)) return;
+
+    actions.push({
+      imageId,
+      sequence: index + 1,
+      action: "ADD",
+    });
+  });
+
+  return actions;
+}
+
+function complianceFileAction(originalFileId: string, currentFileId: string): MediaAction | undefined {
+  if (originalFileId === currentFileId) return undefined;
+  if (!originalFileId && currentFileId) return "ADD";
+  if (originalFileId && !currentFileId) return "DELETE";
+  return "UPDATE";
+}
+
 // ─── Sub-components ───────────────────────────────────────────────────────────
 
 function SectionHeader({ step, title }: { step: string; title: string }) {
@@ -1190,6 +1285,7 @@ function EditProductPageInner() {
   const [docError, setDocError] = useState("");
   const msdsInputRef = useRef<HTMLInputElement | null>(null);
   const docInputRef = useRef<HTMLInputElement | null>(null);
+  const originalMediaRef = useRef<OriginalMediaState | null>(null);
 
   // Load product, categories (with subcategory resolution), and warehouses
   useEffect(() => {
@@ -1243,6 +1339,7 @@ function EditProductPageInner() {
 
         setProductState(isDraftParam ? "DRAFT" : toStr(rawProduct?.state));
         setCategories(cats);
+        originalMediaRef.current = captureOriginalMedia(editState);
         setForm(editState);
         setWarehouses(
           Array.isArray(whJson?.rows) ? whJson.rows :
@@ -1337,14 +1434,15 @@ function EditProductPageInner() {
   function buildPayload(state?: "DRAFT" | "REVIEW") {
     if (!form) return null;
     const resolvedState = state ?? "DRAFT";
-    const productImageIds = form.productImages.filter(Boolean);
-    const hasMainImageInProductImages = Boolean(
-      form.imageId && productImageIds.includes(form.imageId)
-    );
-    const productImagesWithMain = [
-      ...(hasMainImageInProductImages ? [] : [form.imageId]),
-      ...productImageIds,
-    ].filter(Boolean);
+    const productImagesWithMain = normalizedProductImageIds(form);
+    const originalMedia = originalMediaRef.current;
+    const shouldUseMediaActions = Boolean(originalMedia && !isDraftParam);
+    const complianceAction = shouldUseMediaActions
+      ? complianceFileAction(
+          originalMedia?.complianceFileId || "",
+          form.complianceInformation.fileId
+        )
+      : undefined;
     const base = {
       subCategory: form.subCategoryId ? { id: form.subCategoryId } : undefined,
       name: form.name,
@@ -1354,8 +1452,12 @@ function EditProductPageInner() {
       isNew: form.isNew,
       isEligibleToExport: form.isEligibleToExport,
       imageId: form.imageId || null,
-      productFiles: form.productFiles.map((file) => file.id).filter(Boolean),
-      productImages: productImagesWithMain.map((imageId, i) => ({ imageId, sequence: i + 1 })),
+      productFiles: shouldUseMediaActions && originalMedia
+        ? buildProductFileActions(originalMedia.productFiles, form.productFiles)
+        : form.productFiles.map((file) => file.id).filter(Boolean),
+      productImages: shouldUseMediaActions && originalMedia
+        ? buildProductImageActions(originalMedia.productImages, productImagesWithMain)
+        : productImagesWithMain.map((imageId, i) => ({ imageId, sequence: i + 1 })),
       productKeyWords: form.keywords.filter(Boolean).slice(0, 3),
       productFeatures: form.features.filter(Boolean).slice(0, 5),
       productModels: form.models.map((m) => ({
@@ -1410,7 +1512,10 @@ function EditProductPageInner() {
       })),
       productInformations: form.productInformations.filter((i) => i.paramName && i.paramValue),
       categoryInformations: form.categoryInformations.filter((i) => i.paramName && i.paramValue),
-      complianceInformation: { ...form.complianceInformation },
+      complianceInformation: {
+        ...form.complianceInformation,
+        ...(complianceAction ? { action: complianceAction } : {}),
+      },
       warrantyInformation: form.warrantyInformation.enabled
         ? {
             type: form.warrantyInformation.type,
diff --git a/src/lib/product-request-validation.ts b/src/lib/product-request-validation.ts
index d485fec..bb2c311 100644
--- a/src/lib/product-request-validation.ts
+++ b/src/lib/product-request-validation.ts
@@ -64,9 +64,15 @@ export function validateAddProductPayload(payload: Record<string, unknown>) {
     pushMinNumber(issues, payload.preOrderDay, 1, "Hari pre-order");
   }
 
-  strings(payload.productFiles).forEach((fileId, index) => {
-    pushMaxLength(issues, fileId, 100, `File produk ${index + 1}`);
-  });
+  if (Array.isArray(payload.productFiles)) {
+    payload.productFiles.forEach((file, index) => {
+      const fileId =
+        file && typeof file === "object"
+          ? (file as Record<string, unknown>).fileId
+          : file;
+      pushMaxLength(issues, fileId, 100, `File produk ${index + 1}`);
+    });
+  }
 
   const keywords = strings(payload.productKeyWords);
   if (keywords.length > 3) issues.push("Kata kunci pencarian maksimal 3 item.");