From b8890ac38dd0f326e53d1622f9f4411bfa28961f Mon Sep 17 00:00:00 2001
From: Theo Browne <me@theo.li>
Date: Sun, 25 Oct 2026 22:02:47 -0700
Subject: [PATCH] fix(web): short branch names no longer get clipped in thread
 details

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 .../ui/middle-truncate.browser.test.tsx       | 26 +++++++++++++++++++
 .../web/src/components/ui/middle-truncate.tsx |  5 +++-
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 apps/web/src/components/ui/middle-truncate.browser.test.tsx

diff --git a/apps/web/src/components/ui/middle-truncate.browser.test.tsx b/apps/web/src/components/ui/middle-truncate.browser.test.tsx
new file mode 100644
index 0000000000000..3b9b114d2f9f4
--- /dev/null
+++ b/apps/web/src/components/ui/middle-truncate.browser.test.tsx
@@ -0,0 +1,26 @@
+import { describe, expect, it } from "vite-plus/test";
+
+import { render } from "../../../test/render";
+import { MiddleTruncate } from "./middle-truncate";
+
+import "~/index.css";
+
+const narrow = (value: string) => (
+  <div style={{ width: 80 }}>
+    <MiddleTruncate value={value} className="w-full" />
+  </div>
+);
+
+describe("MiddleTruncate", () => {
+  it("does not clip a short value that replaces a truncated one", async () => {
+    await using screen = await render(narrow("t3/investigate-release-build-times"));
+    const label = () => screen.container.querySelector("[title] > span");
+    await expect.poll(() => label()?.hasAttribute("data-overflow")).toBe(true);
+
+    await screen.rerender(narrow("main"));
+
+    expect(label()).toHaveTextContent("main");
+    expect(label()).not.toHaveAttribute("data-overflow");
+    expect(label()).toHaveStyle({ clipPath: "none" });
+  });
+});
diff --git a/apps/web/src/components/ui/middle-truncate.tsx b/apps/web/src/components/ui/middle-truncate.tsx
index 8283006f45c8c..e4b74ec9ced9b 100644
--- a/apps/web/src/components/ui/middle-truncate.tsx
+++ b/apps/web/src/components/ui/middle-truncate.tsx
@@ -47,7 +47,10 @@ export function MiddleTruncate({
           <span className="shrink-0 peer-data-overflow:before:content-['…']">{split.tail}</span>
         </>
       ) : (
-        <span className="min-w-0 truncate">{value}</span>
+        // Keyed so React does not reuse the head node and its imperative clip.
+        <span key="whole" className="min-w-0 truncate">
+          {value}
+        </span>
       )}
     </span>
   );