fix: complete marketplace client remediation

electron/coding-plugins/account-plugin-cache.ts

@@ -92,14 +92,15 @@ export class AccountPluginCache {
     library: MarketplaceLibrarySnapshot | null;
     resolves: Map<string, MarketplaceResolveSnapshot>;
   }>();
+  private readonly libraryIntents = new Map<string, number>();
 
-  getLibrary(binding: AccountBinding): MarketplaceLibrarySnapshot | null {
-    const record = this.records.get(bindingId(binding));
-    return record?.library ? clone(record.library) : null;
+  private nextLibraryIntent(key: string): number {
+    const next = (this.libraryIntents.get(key) ?? 0) + 1;
+    this.libraryIntents.set(key, next);
+    return next;
   }
 
-  setLibrary(binding: AccountBinding, snapshot: MarketplaceLibrarySnapshot): void {
-    const key = bindingId(binding);
+  private setLibrarySnapshot(key: string, binding: AccountBinding, snapshot: MarketplaceLibrarySnapshot): void {
     const record = this.records.get(key) ?? {
       binding: { accountKey: binding.accountKey, epoch: binding.epoch },
       library: null,
@@ -109,8 +110,37 @@ export class AccountPluginCache {
     this.records.set(key, record);
   }
 
-  markLibraryStale(binding: AccountBinding): MarketplaceLibrarySnapshot | null {
+  getLibrary(binding: AccountBinding): MarketplaceLibrarySnapshot | null {
+    const record = this.records.get(bindingId(binding));
+    return record?.library ? clone(record.library) : null;
+  }
+
+  setLibrary(binding: AccountBinding, snapshot: MarketplaceLibrarySnapshot): void {
     const key = bindingId(binding);
+    this.nextLibraryIntent(key);
+    this.setLibrarySnapshot(key, binding, snapshot);
+  }
+
+  /** Reserve the commit slot before an async Library read or mutation starts. */
+  beginLibraryIntent(binding: AccountBinding): number {
+    return this.nextLibraryIntent(bindingId(binding));
+  }
+
+  /** Commit only the latest read/mutation intent for this account binding. */
+  commitLibrary(
+    binding: AccountBinding,
+    intent: number,
+    snapshot: MarketplaceLibrarySnapshot,
+  ): boolean {
+    const key = bindingId(binding);
+    if (this.libraryIntents.get(key) !== intent) return false;
+    this.setLibrarySnapshot(key, binding, snapshot);
+    return true;
+  }
+
+  markLibraryStale(binding: AccountBinding, intent?: number): MarketplaceLibrarySnapshot | null {
+    const key = bindingId(binding);
+    if (intent !== undefined && this.libraryIntents.get(key) !== intent) return null;
     const record = this.records.get(key);
     if (!record?.library) return null;
     record.library = { ...record.library, stale: true };
@@ -193,12 +223,16 @@ export class AccountPluginCache {
   clearAccount(binding: AccountBinding): void {
     assertBinding(binding);
     for (const [key, record] of this.records.entries()) {
-      if (record.binding.accountKey === binding.accountKey) this.records.delete(key);
+      if (record.binding.accountKey === binding.accountKey) {
+        this.records.delete(key);
+        this.libraryIntents.delete(key);
+      }
     }
   }
 
   invalidateAll(): void {
     this.records.clear();
+    this.libraryIntents.clear();
   }
 
   clear(): void {