diff --git a/apps/web/src/components/chat/MessagesTimeline.logic.ts b/apps/web/src/components/chat/MessagesTimeline.logic.ts
index d398583430f5..ff5bfbc8bbd7 100644
--- a/apps/web/src/components/chat/MessagesTimeline.logic.ts
+++ b/apps/web/src/components/chat/MessagesTimeline.logic.ts
@@ -108,12 +108,12 @@ export function resolveTimelineMinimapHasPersistentGutter(viewportWidth: number)
   return sideGutter >= TIMELINE_MINIMAP_PERSISTENT_GUTTER;
 }
 
-export const TIMELINE_MINIMAP_HIT_STRIP_LEFT = 12;
+export const TIMELINE_MINIMAP_HIT_STRIP_INSET = 12;
 export const TIMELINE_MINIMAP_HIT_STRIP_MAX_WIDTH = 40;
 export const TIMELINE_MINIMAP_EXPANDED_HIT_STRIP_WIDTH = "22rem";
 
 /**
- * The minimap overlays the viewport's left edge while the content column is
+ * The minimap overlays the viewport's right edge while the content column is
  * centered, so the side gutter between them shrinks under browser zoom or a
  * narrow pane. A fixed-width hover strip would then sit on top of the message
  * text and swallow its pointer events. Cap the strip's width so it never
@@ -130,7 +130,7 @@ export function resolveTimelineMinimapHitStripWidth(viewportWidth: number): numb
     0,
     Math.min(
       TIMELINE_MINIMAP_HIT_STRIP_MAX_WIDTH,
-      Math.floor(sideGutter) - TIMELINE_MINIMAP_HIT_STRIP_LEFT,
+      Math.floor(sideGutter) - TIMELINE_MINIMAP_HIT_STRIP_INSET,
     ),
   );
 }
diff --git a/apps/web/src/components/chat/MessagesTimeline.test.tsx b/apps/web/src/components/chat/MessagesTimeline.test.tsx
index 7ee4514c3709..0acefe2de2a8 100644
--- a/apps/web/src/components/chat/MessagesTimeline.test.tsx
+++ b/apps/web/src/components/chat/MessagesTimeline.test.tsx
@@ -346,6 +346,25 @@ describe("MessagesTimeline", () => {
     expect(fadedMarkup).toContain("topbar-scroll-fade");
   });
 
+  it("renders the user-message minimap on the right side", () => {
+    const firstEntry = buildUserTimelineEntry("First prompt.");
+    const secondEntry = {
+      ...buildUserTimelineEntry("Second prompt."),
+      id: "entry-2",
+      message: {
+        ...buildUserTimelineEntry("Second prompt.").message,
+        id: MessageId.make("message-2"),
+      },
+    };
+    const markup = renderToStaticMarkup(
+      <MessagesTimeline {...buildProps()} timelineEntries={[firstEntry, secondEntry]} />,
+    );
+
+    expect(markup).toContain('data-testid="timeline-minimap"');
+    expect(markup).toContain("absolute inset-y-0 right-0");
+    expect(markup).not.toContain("absolute inset-y-0 left-0");
+  });
+
   it("keeps assistant changed-files headers sticky below the thread header", () => {
     const assistantMessageId = MessageId.make("message-assistant-with-files");
     const turnId = TurnId.make("turn-with-files");
diff --git a/apps/web/src/components/chat/MessagesTimeline.tsx b/apps/web/src/components/chat/MessagesTimeline.tsx
index af920c0d6156..1ad0947846de 100644
--- a/apps/web/src/components/chat/MessagesTimeline.tsx
+++ b/apps/web/src/components/chat/MessagesTimeline.tsx
@@ -789,7 +789,7 @@ function TimelineMinimap({
   return (
     <div
       className={cn(
-        "group/minimap pointer-events-none absolute inset-y-0 left-0 z-40 hidden w-18 [@media(pointer:fine)]:block",
+        "group/minimap pointer-events-none absolute inset-y-0 right-0 z-40 hidden w-18 [@media(pointer:fine)]:block",
         hasPersistentGutter
           ? "opacity-100"
           : "opacity-0 transition-opacity duration-150 hover:opacity-100 focus-within:opacity-100",
@@ -801,7 +801,7 @@ function TimelineMinimap({
         <button
           aria-label={`Jump to message: ${activeItem?.userText ?? "User message"}`}
           className={cn(
-            "absolute top-1/2 left-3 -translate-y-1/2 cursor-pointer bg-transparent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring/70",
+            "absolute top-1/2 right-3 -translate-y-1/2 cursor-pointer bg-transparent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring/70",
             // The strip is width-capped to the side gutter so it never overlays
             // the centered content column; with no usable gutter it goes inert.
             hitStripWidth > 0 ? "pointer-events-auto" : "pointer-events-none",
@@ -853,7 +853,7 @@ function TimelineMinimap({
           }}
           type="button"
         >
-          <div className="absolute top-0 left-3 h-full w-px bg-border/15" />
+          <div className="absolute top-0 right-3 h-full w-px bg-border/15" />
           {items.map((item, index) => {
             const top = `${resolveTimelineMinimapTopPercent(index, items.length)}%`;
             const activeDistance =
@@ -862,7 +862,7 @@ function TimelineMinimap({
               <span
                 aria-hidden="true"
                 className={cn(
-                  "pointer-events-none absolute left-0 h-0.5 -translate-y-1/2 rounded-full bg-muted-foreground/35 transition-[background-color,width] duration-150 data-[in-view=true]:bg-foreground/90",
+                  "pointer-events-none absolute right-0 h-0.5 -translate-y-1/2 rounded-full bg-muted-foreground/35 transition-[background-color,width] duration-150 data-[in-view=true]:bg-foreground/90",
                   activeDistance === 0
                     ? "w-6 bg-muted-foreground/75"
                     : activeDistance === 1
@@ -887,7 +887,7 @@ function TimelineMinimap({
           })}
           {activeItem ? (
             <span
-              className="pointer-events-auto absolute left-8 w-80 cursor-text select-text"
+              className="pointer-events-auto absolute right-8 w-80 cursor-text select-text"
               data-minimap-preview
               onMouseMove={(event) => event.stopPropagation()}
               style={{