diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..d33e643
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2026-04-04 - Actor Isolation Blocking Parallelism in TaskGroups
+**Learning:** Using an `actor` to manage a `withTaskGroup` where child tasks invoke synchronous, blocking operations directly on the actor (`await self.method()`) inadvertently serializes the tasks on the actor's executor, preventing parallelism.
+**Action:** For stateless components interacting with thread-safe dependencies (like `FileManager`), use `struct`s or `nonisolated` methods instead of `actor`s to allow tasks to execute concurrently across threads.
diff --git a/Sources/Cacheout/Scanner/CacheScanner.swift b/Sources/Cacheout/Scanner/CacheScanner.swift
index 3ce3e9c..a4e72bb 100644
--- a/Sources/Cacheout/Scanner/CacheScanner.swift
+++ b/Sources/Cacheout/Scanner/CacheScanner.swift
@@ -26,13 +26,13 @@
 
 import Foundation
 
-actor CacheScanner {
+struct CacheScanner {
     private let fileManager = FileManager.default
 
     func scanAll(_ categories: [CacheCategory]) async -> [ScanResult] {
         await withTaskGroup(of: ScanResult.self) { group in
             for category in categories {
-                group.addTask { await self.scanCategory(category) }
+                group.addTask { self.scanCategory(category) }
             }
             var results: [ScanResult] = []
             for await result in group {
@@ -42,7 +42,7 @@ actor CacheScanner {
         }
     }
 
-    func scanCategory(_ category: CacheCategory) async -> ScanResult {
+    func scanCategory(_ category: CacheCategory) -> ScanResult {
         let resolvedPaths = category.resolvedPaths
         guard !resolvedPaths.isEmpty else {
             return ScanResult(category: category, sizeBytes: 0, itemCount: 0, exists: false)
diff --git a/Sources/Cacheout/Scanner/NodeModulesScanner.swift b/Sources/Cacheout/Scanner/NodeModulesScanner.swift
index 3ed4d8c..24d9211 100644
--- a/Sources/Cacheout/Scanner/NodeModulesScanner.swift
+++ b/Sources/Cacheout/Scanner/NodeModulesScanner.swift
@@ -28,7 +28,7 @@
 
 import Foundation
 
-actor NodeModulesScanner {
+struct NodeModulesScanner {
     private let fileManager = FileManager.default
 
     /// Common directories where developers keep projects
@@ -62,7 +62,7 @@ actor NodeModulesScanner {
                 let rootURL = home.appendingPathComponent(root)
                 guard fileManager.fileExists(atPath: rootURL.path) else { continue }
                 group.addTask {
-                    await self.findNodeModules(in: rootURL, maxDepth: maxDepth)
+                    self.findNodeModules(in: rootURL, maxDepth: maxDepth)
                 }
             }
             for await items in group {
@@ -77,7 +77,7 @@ actor NodeModulesScanner {
             .sorted { $0.sizeBytes > $1.sizeBytes }
     }
 
-    private func findNodeModules(in directory: URL, maxDepth: Int, currentDepth: Int = 0) async -> [NodeModulesItem] {
+    private func findNodeModules(in directory: URL, maxDepth: Int, currentDepth: Int = 0) -> [NodeModulesItem] {
         guard currentDepth < maxDepth else { return [] }
 
         var results: [NodeModulesItem] = []
@@ -113,7 +113,7 @@ actor NodeModulesScanner {
             let name = item.lastPathComponent
             guard !Self.skipDirs.contains(name) else { continue }
             guard (try? item.resourceValues(forKeys: [.isDirectoryKey]).isDirectory) == true else { continue }
-            let subResults = await findNodeModules(in: item, maxDepth: maxDepth, currentDepth: currentDepth + 1)
+            let subResults = findNodeModules(in: item, maxDepth: maxDepth, currentDepth: currentDepth + 1)
             results.append(contentsOf: subResults)
         }