From e20c857e0f6844c8347e2bf84decbf7f991dddcc Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 15 Apr 2026 09:26:29 +0000
Subject: [PATCH] fix(stream): per-envelope try/catch in replay loop

A throw in a single replayed envelope used to abort the entire
onResumeStreamReplay loop, skipping all subsequent envelopes in the
batch. Fence still cleared via finally, so the loss was silent.
Matches the per-event error handling already in clearResumeFence.
---
 src/lib/components/chat/Chat.svelte | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/lib/components/chat/Chat.svelte b/src/lib/components/chat/Chat.svelte
index 20b70faa59..120e4e3862 100644
--- a/src/lib/components/chat/Chat.svelte
+++ b/src/lib/components/chat/Chat.svelte
@@ -768,7 +768,14 @@
 			for (const envelope of envelopes) {
 				if (!envelope || typeof envelope !== 'object') continue;
 				envelope._replayed = true;
-				await chatEventHandler(envelope);
+				try {
+					await chatEventHandler(envelope);
+				} catch (e) {
+					// Per-envelope catch so one bad frame doesn't abort
+					// the rest of the replay batch and silently lose the
+					// envelopes that come after it.
+					console.error('resume replay envelope error', e);
+				}
 			}
 		} finally {
 			const current = resumeActiveRequestIdByMessageId.get(messageId);