diff --git a/src/app/admin/audit/summarize.ts b/src/app/admin/audit/summarize.ts
index e19f9c7..1f4a9ac 100644
--- a/src/app/admin/audit/summarize.ts
+++ b/src/app/admin/audit/summarize.ts
@@ -324,10 +324,19 @@ const PARTS: Record<string, readonly Part[]> = {
   "access_list.watch_added": [accessListRef("name", "accessListId")],
   "access_list.watch_removed": [accessListRef("name", "accessListId")],
   "discord.unlinked": [scalar("reason")],
+  // Both writers stamp `partial` on every row (jobs/discord-roles.ts:143 and
+  // :369), so it has to be declared here or every single role-change row
+  // reports a `+1 more` that has nothing behind it. `flag` rather than
+  // `scalar`: the interesting state is the true one, and a row reading
+  // "partial false" would be noise on the overwhelming majority that are not.
+  // Last in the list because it qualifies the whole change rather than naming
+  // a part of it — and declared parts are never truncated, so trailing costs
+  // it no visibility.
   "discord.role_changed": [
     roles("added", "removed"),
     tierLabelled("tier", "tier"),
     scalar("cause"),
+    flag("partial", "partial"),
   ],
   // `error` leads: this is the row an admin opens the audit log to read
   // (the deprovision half of `discord.role_sync_failed`'s failure), and the
diff --git a/tests/audit-summarize.test.ts b/tests/audit-summarize.test.ts
index c32fb70..360f8a9 100644
--- a/tests/audit-summarize.test.ts
+++ b/tests/audit-summarize.test.ts
@@ -224,6 +224,39 @@ describe("summarizeDetails, declared fields and role rendering", () => {
     ).toBe("—");
   });
 
+  // Both writers stamp `partial` on every row (jobs/discord-roles.ts:143 on the
+  // deprovision path, :369 on the main sweep), so leaving it undeclared made
+  // EVERY role-change row claim a hidden key it did not have.
+  it("says a role change was partial", () => {
+    expect(
+      summarizeDetails(
+        "discord.role_changed",
+        { added: ["300"], removed: [], partial: true },
+        ROLE_NAMES,
+      ),
+    ).toBe("+alumni, partial");
+  });
+
+  it("stays silent, not hidden, when a role change was complete", () => {
+    expect(
+      summarizeDetails(
+        "discord.role_changed",
+        { added: ["300"], removed: [], partial: false },
+        ROLE_NAMES,
+      ),
+    ).toBe("+alumni");
+  });
+
+  it("counts a genuinely undeclared key on a role change", () => {
+    expect(
+      summarizeDetails(
+        "discord.role_changed",
+        { added: ["300"], removed: [], partial: false, somethingNew: 1 },
+        ROLE_NAMES,
+      ),
+    ).toBe("+alumni, +1 more");
+  });
+
   it("surfaces the cause a tier change was written with", () => {
     expect(
       summarizeDetails("tier.changed", {