From 87d46bba578efd25e59d64ec680a1886446e6c49 Mon Sep 17 00:00:00 2001
From: plind-dm <59729252+plind-dm@users.noreply.github.com>
Date: Fri, 3 Apr 2026 23:15:10 +0900
Subject: [PATCH] fix(ui): use null instead of undefined when clearing extra
 args

Clearing the extra args field set the overlay value to undefined,
which gets dropped during object spread when building the PATCH
payload. The existing extraArgs from the agent config survived the
merge, making it impossible to clear the field. Use null so the
value explicitly overwrites the existing config entry.

Closes #2350
---
 ui/src/components/AgentConfigForm.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/src/components/AgentConfigForm.tsx b/ui/src/components/AgentConfigForm.tsx
index c3c9bdfa..8c4f2ff8 100644
--- a/ui/src/components/AgentConfigForm.tsx
+++ b/ui/src/components/AgentConfigForm.tsx
@@ -831,7 +831,7 @@ export function AgentConfigForm(props: AgentConfigFormProps) {
                   onCommit={(v) =>
                     isCreate
                       ? set!({ extraArgs: v })
-                      : mark("adapterConfig", "extraArgs", v ? parseCommaArgs(v) : undefined)
+                      : mark("adapterConfig", "extraArgs", v?.trim() ? parseCommaArgs(v) : null)
                   }
                   immediate
                   className={inputClass}