From ebdaf9fe9d5f9c9e96be6189d736e28a9ff034b8 Mon Sep 17 00:00:00 2001
From: Barret Schloerke <barret@posit.co>
Date: Mon, 10 Mar 2025 11:18:05 -0400
Subject: [PATCH 1/3] Make `app_opts()` args into kwargs

---
 shiny/express/_run.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/shiny/express/_run.py b/shiny/express/_run.py
index 83f4b91c9..aeb35766f 100644
--- a/shiny/express/_run.py
+++ b/shiny/express/_run.py
@@ -295,6 +295,7 @@ class AppOpts(TypedDict):
 
 @no_example()
 def app_opts(
+    *,
     static_assets: str | Path | Mapping[str, str | Path] | MISSING_TYPE = MISSING,
     debug: bool | MISSING_TYPE = MISSING,
 ):

From d608363cfb897fa57aa3c5050242cc4e84d3373b Mon Sep 17 00:00:00 2001
From: Barret Schloerke <barret@posit.co>
Date: Mon, 10 Mar 2025 11:18:13 -0400
Subject: [PATCH 2/3] Update app.py

---
 tests/playwright/shiny/components/chat/icon/app.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/playwright/shiny/components/chat/icon/app.py b/tests/playwright/shiny/components/chat/icon/app.py
index c673d87fe..035b8a539 100644
--- a/tests/playwright/shiny/components/chat/icon/app.py
+++ b/tests/playwright/shiny/components/chat/icon/app.py
@@ -7,7 +7,7 @@
 
 ui.page_opts(title="Chat Icons")
 
-app_opts({"/img": Path(__file__).parent / "img"})
+app_opts(static_assets={"/img": Path(__file__).parent / "img"})
 
 with ui.layout_columns():
     # Default Bot ---------------------------------------------------------------------

From 2c1a12d179cfc8175ef6f2f7e78fa4832ffbaf9f Mon Sep 17 00:00:00 2001
From: Barret Schloerke <barret@posit.co>
Date: Mon, 10 Mar 2025 11:20:34 -0400
Subject: [PATCH 3/3] Update CHANGELOG.md

---
 CHANGELOG.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c2b84243..31d312614 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changes
 
+* Express mode's `app_opts()` requires all arguments to be keyword-only. If you are using positional arguments, you will need to update your code. (#1895)
+
 * The `.get_latest_stream_result()` method on `ui.MarkdownStream()` was deprecated in favor of the new `.latest_stream` property. Call `.result()` on the property to get the latest result, `.status` to check the status, and `.cancel()` to cancel the stream.
 
 ### Bug fixes