From 223b52fd789aecff90f109b5249845e51a8dd3ab Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sun, 29 Mar 2026 05:39:28 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20fix=20actor=20serialization?=
 =?UTF-8?q?=20bug=20preventing=20parallel=20scanning?=
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Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
---
 .jules/bolt.md                                    | 3 +++
 Sources/Cacheout/Scanner/CacheScanner.swift       | 2 +-
 Sources/Cacheout/Scanner/NodeModulesScanner.swift | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 .jules/bolt.md

diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..7815238
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-05-14 - withTaskGroup Serialization Bug
+**Learning:** In Swift structured concurrency, using an `actor` to manage a `withTaskGroup` where tasks invoke synchronous, blocking I/O (like `FileManager` operations) directly on the actor's own methods inadvertently serializes the tasks on the actor's single executor, completely preventing the intended parallelism.
+**Action:** For stateless components interacting with thread-safe dependencies like `FileManager.default`, use `struct`s or explicitly `nonisolated` methods to allow tasks to execute genuinely concurrently across the cooperative thread pool.
diff --git a/Sources/Cacheout/Scanner/CacheScanner.swift b/Sources/Cacheout/Scanner/CacheScanner.swift
index 3ce3e9c..da31cbc 100644
--- a/Sources/Cacheout/Scanner/CacheScanner.swift
+++ b/Sources/Cacheout/Scanner/CacheScanner.swift
@@ -26,7 +26,7 @@
 
 import Foundation
 
-actor CacheScanner {
+struct CacheScanner {
     private let fileManager = FileManager.default
 
     func scanAll(_ categories: [CacheCategory]) async -> [ScanResult] {
diff --git a/Sources/Cacheout/Scanner/NodeModulesScanner.swift b/Sources/Cacheout/Scanner/NodeModulesScanner.swift
index 3ed4d8c..ea00d41 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