fix(marketplace): close client review findings

electron/coding-plugins/effective-resolver.ts

@@ -220,6 +220,10 @@ function validateBinding(value: AccountBinding | null): AccountBinding | null {
 function marketplaceSkillConflicts(records: readonly DefinitionRecord[]): ReadonlySet<string> {
   const blocked = new Set<string>();
   const owned = new Set<string>(CORE_CODING_SKILL_IDS);
+  for (const { definition } of records) {
+    if (definition.provenance.source === 'marketplace') continue;
+    for (const { id } of definition.skills) owned.add(id);
+  }
   for (const { definition } of records) {
     if (definition.provenance.source !== 'marketplace') continue;
     const conflicts = definition.skills.some(({ id }) => owned.has(id));