diff --git a/crates/project/tests/tracked.rs b/crates/project/tests/tracked.rs
new file mode 100644
index 0000000..293d9fa
--- /dev/null
+++ b/crates/project/tests/tracked.rs
@@ -0,0 +1,269 @@
+mod common;
+use common::{minimal_test_module::MinimalTestModule, setup_project};
+use project::*;
+use std::sync::Arc;
+
+#[test]
+fn test_tracked_view_not_accessed() {
+    let mut reg = ModuleRegistry::new();
+    reg.register::<MinimalTestModule>();
+
+    let mut project = Project::new();
+    {
+        let mut cb = ChangeBuilder::from(&project);
+        let view = project.create_view(&reg).unwrap();
+        let _ = view.create_data::<MinimalTestModule>(&mut cb);
+        project.apply_changes(cb, &reg).unwrap();
+    }
+
+    let view = Arc::new(project.create_view(&reg).unwrap());
+    let (_tracked_view, recorder) = TrackedProjectView::new(view);
+
+    let validator = recorder.freeze();
+    assert!(!validator.was_accessed());
+}
+
+#[test]
+fn test_tracked_view_basic_access() {
+    let mut reg = ModuleRegistry::new();
+    reg.register::<MinimalTestModule>();
+
+    let mut project = Project::new();
+    let data_id;
+    {
+        let mut cb = ChangeBuilder::from(&project);
+        let view = project.create_view(&reg).unwrap();
+        data_id = view.create_data::<MinimalTestModule>(&mut cb);
+        project.apply_changes(cb, &reg).unwrap();
+    }
+
+    let view = Arc::new(project.create_view(&reg).unwrap());
+    let (tracked_view, recorder) = TrackedProjectView::new(view);
+
+    // Access data to generate tracking events
+    let _data = tracked_view
+        .open_data_by_id::<MinimalTestModule>(data_id)
+        .unwrap();
+
+    let validator = recorder.freeze();
+    assert!(validator.was_accessed());
+}
+
+#[test]
+fn test_document_operations() {
+    let p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Test document creation
+    let mut cb = ChangeBuilder::from(&p.project);
+    let _new_doc =
+        tracked_view.create_document(&mut cb, Path::new("/new_doc".to_string()).unwrap());
+
+    // Test document access and data operations within document
+    let doc = tracked_view.open_document(p.doc1).unwrap();
+    let data_by_type: Vec<_> = doc.open_data_by_type::<MinimalTestModule>().collect();
+    assert!(!data_by_type.is_empty());
+
+    // Test document data access by ID
+    let data = doc
+        .open_data_by_id::<MinimalTestModule>(p.doc1_minimal_data)
+        .unwrap();
+    assert_eq!(data.session_data().num, 10);
+
+    let validator = recorder.freeze();
+    assert!(validator.was_accessed());
+}
+
+#[test]
+fn test_data_operations() {
+    let p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Test different ways to access data
+    let by_id = tracked_view.open_data_by_id::<MinimalTestModule>(p.doc1_minimal_data);
+    assert!(by_id.is_some());
+
+    let by_type: Vec<_> = tracked_view
+        .open_data_by_type::<MinimalTestModule>()
+        .collect();
+    assert!(!by_type.is_empty());
+
+    let validator = recorder.freeze();
+    assert!(validator.was_accessed());
+}
+
+#[test]
+fn test_different_project_validation() {
+    let p1 = setup_project();
+    let p2 = setup_project();
+
+    let view1 = Arc::new(p1.view());
+    let view2 = Arc::new(p2.view());
+
+    let (tracked_view, recorder) = TrackedProjectView::new(view1.clone());
+
+    // Generate some access events
+    let _doc = tracked_view.open_document(p1.doc1);
+
+    let validator = recorder.freeze();
+
+    // Should be invalid for different projects
+    assert!(!validator.is_cache_valid(&view1, &view2));
+}
+
+#[test]
+fn test_cache_validation_open_data_by_type() {
+    let mut p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Access data by type to generate tracking event
+    let data_list: Vec<_> = tracked_view
+        .open_data_by_type::<MinimalTestModule>()
+        .collect();
+    assert!(!data_list.is_empty());
+
+    let validator = recorder.freeze();
+    assert!(validator.is_cache_valid(&view, &view));
+
+    // Create new data of same type
+    let mut cb = ChangeBuilder::from(&view);
+    tracked_view.create_data::<MinimalTestModule>(&mut cb);
+    p.project.apply_changes(cb, &p.reg).unwrap();
+    let new_view = p.view();
+
+    // Cache should be invalid as the list of data of this type changed
+    assert!(!validator.is_cache_valid(&view, &new_view));
+}
+
+#[test]
+fn test_cache_validation_document_data_by_id() {
+    let mut p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Access document data by ID
+    let doc = tracked_view.open_document(p.doc1).unwrap();
+    let data = doc
+        .open_data_by_id::<MinimalTestModule>(p.doc1_minimal_data)
+        .unwrap();
+    let _session = data.session_data(); // Access some data to ensure it's tracked
+
+    let validator = recorder.freeze();
+    assert!(validator.is_cache_valid(&view, &view));
+
+    // Move data to different document
+    let mut cb = ChangeBuilder::from(&view);
+    let mut new_doc =
+        tracked_view.create_document(&mut cb, Path::new("/new_doc".to_string()).unwrap());
+    data.move_to_planned_document(&mut new_doc);
+    p.project.apply_changes(cb, &p.reg).unwrap();
+    let new_view = p.view();
+
+    // Cache should be invalid as the data moved documents
+    assert!(!validator.is_cache_valid(&view, &new_view));
+}
+
+#[test]
+fn test_cache_validation_document_data_by_type() {
+    let mut p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Access document data by type
+    let doc = tracked_view.open_document(p.doc1).unwrap();
+    let data_list: Vec<_> = doc.open_data_by_type::<MinimalTestModule>().collect();
+    assert!(!data_list.is_empty());
+
+    let validator = recorder.freeze();
+    assert!(validator.is_cache_valid(&view, &view));
+
+    // Add new data of same type to document
+    let mut cb = ChangeBuilder::from(&view);
+    let _data = doc.create_data::<MinimalTestModule>(&mut cb);
+    p.project.apply_changes(cb, &p.reg).unwrap();
+    let new_view = p.view();
+
+    // Cache should be invalid as document's data list changed
+    assert!(!validator.is_cache_valid(&view, &new_view));
+}
+
+#[test]
+fn test_cache_validation_complex_scenario() {
+    let mut p = setup_project();
+    let view = Arc::new(p.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Generate multiple types of access events
+    let doc = tracked_view.open_document(p.doc1).unwrap();
+
+    // Access by type globally
+    let _global_data: Vec<_> = tracked_view
+        .open_data_by_type::<MinimalTestModule>()
+        .collect();
+
+    // Access by type in document
+    let _doc_data: Vec<_> = doc.open_data_by_type::<MinimalTestModule>().collect();
+
+    // Access specific data
+    let data = doc
+        .open_data_by_id::<MinimalTestModule>(p.doc1_minimal_data)
+        .unwrap();
+    let _session = data.session_data();
+
+    let validator = recorder.freeze();
+    assert!(validator.is_cache_valid(&view, &view));
+
+    // Make various modifications
+    let mut cb = ChangeBuilder::from(&view);
+
+    // Create new data
+    let _new_data_id = tracked_view.create_data::<MinimalTestModule>(&mut cb);
+
+    // Move existing data
+    let mut new_doc =
+        tracked_view.create_document(&mut cb, Path::new("/new_doc".to_string()).unwrap());
+    data.move_to_planned_document(&mut new_doc);
+
+    // Modify data content
+    data.apply_session(42, &mut cb);
+
+    p.project.apply_changes(cb, &p.reg).unwrap();
+    let new_view = p.view();
+
+    // Cache should be invalid due to multiple changes
+    assert!(!validator.is_cache_valid(&view, &new_view));
+}
+
+#[test]
+fn test_cache_validation_edge_cases() {
+    // Create two separate projects to get valid but non-existent IDs
+    let mut p1 = setup_project();
+    let p2 = setup_project();
+
+    let view = Arc::new(p1.view());
+    let (tracked_view, recorder) = TrackedProjectView::new(view.clone());
+
+    // Test with document that exists in p2 but not in p1
+    let _missing_doc = tracked_view.open_document(p2.doc1);
+
+    // Test with non-existent data (using data ID from p2)
+    let doc = tracked_view.open_document(p1.doc1).unwrap();
+    let _missing_data = doc.open_data_by_id::<MinimalTestModule>(p2.doc1_minimal_data);
+
+    // Test with empty data type list
+    let _empty_list = doc.open_data_by_type::<MinimalTestModule>();
+
+    let validator = recorder.freeze();
+
+    // Modify project
+    let mut cb = ChangeBuilder::from(&view);
+    let _data = doc.create_data::<MinimalTestModule>(&mut cb);
+    p1.project.apply_changes(cb, &p1.reg).unwrap();
+    let new_view = p1.view();
+
+    // Validate cache with edge cases
+    assert!(!validator.is_cache_valid(&view, &new_view));
+}