diff --git a/src/components/chat/ChatComposer.tsx b/src/components/chat/ChatComposer.tsx
index 6c6d97c..1cd28e1 100644
--- a/src/components/chat/ChatComposer.tsx
+++ b/src/components/chat/ChatComposer.tsx
@@ -85,7 +85,7 @@ function GhostEditor({
         data-testid="composer-editor"
         tabIndex={0}
         className={cn(
-          "composer-tiptap -m-1 block max-h-[8lh] min-h-[calc(2lh+--spacing(2))] overflow-y-auto p-1 whitespace-pre-wrap wrap-break-word bg-transparent leading-relaxed focus:outline-none",
+          "composer-tiptap -m-1 block [font-kerning:none] [font-variant-ligatures:none] max-h-[8lh] min-h-[calc(2lh+--spacing(2))] overflow-y-auto p-1 whitespace-pre-wrap wrap-break-word bg-transparent leading-relaxed focus:outline-none",
           complete ? "text-success-foreground" : "text-foreground",
         )}
       >
diff --git a/tests/play.mjs b/tests/play.mjs
index 5c6279d..54a735b 100644
--- a/tests/play.mjs
+++ b/tests/play.mjs
@@ -255,6 +255,10 @@ async function checkWordsStayPutWhileTyping(browser) {
       if (shifted >= 0) moved.push(`${width}px "${text.slice(0, n).slice(-12)}|" moved "${text.slice(shifted, shifted + 8)}"`);
     }
   }
+  const shaping = await page
+    .locator('[data-testid="composer-editor"]')
+    .evaluate((el) => `${getComputedStyle(el).fontKerning} ${getComputedStyle(el).fontVariantLigatures}`);
+  check(shaping === "none none", `composer turns off kerning and ligatures so letters keep their x position (got ${shaping})`);
   check(wrapped >= 5, `prompt wraps at ${wrapped} of 11 widths`);
   check(moved.length === 0, `no character changes line while typing${moved.length ? ` (${moved.length} keys): ${moved.slice(0, 3).join("; ")}` : ""}`);
   check(errors.length === 0, `no console errors in wrap run${errors.length ? `: ${errors.join(" | ")}` : ""}`);