diff --git a/src/components/XtermPane.tsx b/src/components/XtermPane.tsx
index 242fa27..910a3de 100644
--- a/src/components/XtermPane.tsx
+++ b/src/components/XtermPane.tsx
@@ -175,6 +175,8 @@ export default function XtermPane({
       // final size — bash gets a single clean redraw.
       let resizeRaf: number | null = null;
       let resizePtyTimer: number | null = null;
+      let lastSentCols = -1;
+      let lastSentRows = -1;
       ro = new ResizeObserver(() => {
         if (resizeRaf != null) return;
         resizeRaf = requestAnimationFrame(() => {
@@ -186,9 +188,17 @@ export default function XtermPane({
             if (resizePtyTimer != null) clearTimeout(resizePtyTimer);
             resizePtyTimer = window.setTimeout(() => {
               resizePtyTimer = null;
-              if (paneId != null && term) {
-                void resizePane(paneId, term.cols, term.rows);
+              if (paneId == null || !term) return;
+              // Skip if the cell grid didn't actually change — saves a
+              // pointless SIGWINCH that would make bash redraw its prompt
+              // (which feeds back into onDataReceived and causes the idle
+              // indicator to flap; see the analysis around v0.2.2).
+              if (term.cols === lastSentCols && term.rows === lastSentRows) {
+                return;
               }
+              lastSentCols = term.cols;
+              lastSentRows = term.rows;
+              void resizePane(paneId, term.cols, term.rows);
             }, 150);
           } catch (e) {
             console.warn("resize failed", e);