diff --git a/src/shared/types.ts b/src/shared/types.ts
index 0d2814d..b639890 100644
--- a/src/shared/types.ts
+++ b/src/shared/types.ts
@@ -69,10 +69,12 @@ export const CATEGORY_LABELS: Record<MessageCategory, string> = {
   system_message: "System Messages",
   hook_progress: "Hook/Progress",
   file_snapshot: "File Snapshots",
-  summary: "Summaries",
+  summary: "Compactions",
 };
 
 export const DEFAULT_HIDDEN_CATEGORIES: MessageCategory[] = [
-  "thinking",
+  "tool_result",
+  "system_message",
   "hook_progress",
+  "file_snapshot",
 ];
diff --git a/tests/unit/filters.test.ts b/tests/unit/filters.test.ts
index 24c17ac..0b5ce97 100644
--- a/tests/unit/filters.test.ts
+++ b/tests/unit/filters.test.ts
@@ -48,15 +48,17 @@ describe("filters", () => {
     expect(filtered.find((m) => m.category === "thinking")).toBeUndefined();
   });
 
-  it("default filter state has thinking and hooks disabled", () => {
+  it("default filter state hides tool_result, system, hooks, and snapshots", () => {
     const defaultEnabled = new Set(ALL_CATEGORIES);
     for (const cat of DEFAULT_HIDDEN_CATEGORIES) {
       defaultEnabled.delete(cat);
     }
     const filtered = filterMessages(messages, defaultEnabled);
-    expect(filtered.find((m) => m.category === "thinking")).toBeUndefined();
+    expect(filtered.find((m) => m.category === "tool_result")).toBeUndefined();
+    expect(filtered.find((m) => m.category === "system_message")).toBeUndefined();
     expect(filtered.find((m) => m.category === "hook_progress")).toBeUndefined();
-    expect(filtered).toHaveLength(7);
+    expect(filtered.find((m) => m.category === "file_snapshot")).toBeUndefined();
+    expect(filtered).toHaveLength(5);
   });
 
   it("all-off filter returns empty array", () => {