From 93b47d962a47852f560d0c77b1ff990e49f0fa9f Mon Sep 17 00:00:00 2001
From: Brooklyn Nicholson <brooklyn.bb.nicholson@gmail.com>
Date: Mon, 20 Apr 2026 15:25:29 -0500
Subject: [PATCH] fix(tui): auto-expand Activity on error
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The Activity accordion in ToolTrail tints red (via metaTone) when an error
item is present, but stays collapsed — the error is invisible until the
user clicks. Track the latest error id and force-open openMeta whenever
it advances. Users can still manually collapse; a new error re-opens.
---
 ui-tui/src/components/thinking.tsx | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ui-tui/src/components/thinking.tsx b/ui-tui/src/components/thinking.tsx
index 958333d6..2c741caa 100644
--- a/ui-tui/src/components/thinking.tsx
+++ b/ui-tui/src/components/thinking.tsx
@@ -596,6 +596,17 @@ export const ToolTrail = memo(function ToolTrail({
     }
   }, [detailsMode])
 
+  const latestErrorId = useMemo(
+    () => activity.reduce((max, i) => (i.tone === 'error' && i.id > max ? i.id : max), -1),
+    [activity]
+  )
+
+  useEffect(() => {
+    if (latestErrorId >= 0) {
+      setOpenMeta(true)
+    }
+  }, [latestErrorId])
+
   const cot = useMemo(() => thinkingPreview(reasoning, 'full', THINKING_COT_MAX), [reasoning])
 
   if (