diff --git a/core/src/document/session.rs b/core/src/document/session.rs
index 01e49c5..8dd49e9 100644
--- a/core/src/document/session.rs
+++ b/core/src/document/session.rs
@@ -16,7 +16,6 @@
 //   A curated, ordered list of documents (or individual pages within them).
 //   Items are persisted exactly as stored. Missing files are detected and
 //   removed with a warning when the session file is loaded.
-//   `path` is None for this kind.
 //
 // The on-disk representation of a session list is managed by `store.rs`.
 
@@ -53,7 +52,9 @@ impl SessionItem {
 pub struct SessionData {
     pub name: String,
     pub kind: CollectionKind,
-    /// Source directory for `DirectoryBrowser` sessions; `None` for `DocumentCollection`.
+    /// For DirectoryBrowser: the source directory to scan.
+    /// For DocumentCollection: None (items are managed individually).
+    /// The .ron session file path is tracked separately.
     #[serde(default)]
     pub path: Option<PathBuf>,
     pub items: Vec<SessionItem>,