chore: Remove Deprecated APIs

src/main/kotlin/com/squareup/cash/hermit/HermitCleanupService.kt

@@ -0,0 +1,12 @@
+package com.squareup.cash.hermit
+
+import com.intellij.openapi.Disposable
+import com.intellij.openapi.components.Service
+import com.intellij.openapi.project.Project
+
+@Service(Service.Level.PROJECT)
+class HermitCleanupService(private val project: Project) : Disposable {
+    override fun dispose() {
+        Hermit.remove(project)
+    }
+}

src/main/kotlin/com/squareup/cash/hermit/HermitProjectStartupActivity.kt

@@ -0,0 +1,13 @@
+package com.squareup.cash.hermit
+
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.startup.ProjectActivity
+
+class HermitProjectStartupActivity: ProjectActivity {
+  override suspend fun execute(project: Project) {
+    Hermit(project).open()
+
+    // Ensure HermitCleanupService is initialized and disposal is registered
+    project.getService(HermitCleanupService::class.java)
+  }
+}

src/main/kotlin/com/squareup/cash/hermit/action/EnableHermitAction.kt

@@ -3,7 +3,6 @@ package com.squareup.cash.hermit.action
 import com.intellij.notification.Notification
 import com.intellij.notification.NotificationAction
 import com.intellij.openapi.actionSystem.AnActionEvent
-import com.intellij.openapi.progress.PerformInBackgroundOption
 import com.intellij.openapi.progress.ProgressIndicator
 import com.intellij.openapi.progress.Task
 import com.intellij.openapi.project.Project
@@ -18,7 +17,7 @@ class EnableHermitAction : NotificationAction("") {
 }
 
 class BackgroundableWrapper(project: Project, title: String, private val task: Runnable)
-    : Task.Backgroundable(project, title, true, PerformInBackgroundOption.DEAF) {
+    : Task.Backgroundable(project, title, true) {
 
     override fun run(indicator: ProgressIndicator) {
         task.run()

src/main/resources/META-INF/plugin.xml

@@ -19,7 +19,6 @@
 
     <projectListeners>
         <listener class="com.squareup.cash.hermit.HermitVFSChangeListener" topic="com.intellij.openapi.vfs.newvfs.BulkFileListener" />
-        <listener class="com.squareup.cash.hermit.HermitProjectManagerListener" topic="com.intellij.openapi.project.ProjectManagerListener" />
     </projectListeners>
 
     <applicationListeners>
@@ -40,6 +39,7 @@
     <extensions defaultExtensionNs="com.intellij">
         <toolsCustomizer implementation="com.squareup.cash.hermit.execution.HermitToolsCustomiser" />
         <statusBarWidgetFactory id="HermitStatusBarWidgetFactory" implementation="com.squareup.cash.hermit.ui.statusbar.HermitStatusBarWidgetFactory"/>
+        <postStartupActivity implementation="com.squareup.cash.hermit.HermitProjectStartupActivity"/>
     </extensions>
 
     <extensionPoints>