diff --git a/.gitignore b/.gitignore
index 86902d29..83ae8db6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,7 @@ python/.venv/
 
 # Externalized apps and analysis (each is its own Gitea repo)
 apps/*/
+cpp/apps/*/
 analysis/*/
 
 # Projects (each is its own git repo, only project.md templates are versioned)
diff --git a/cpp/apps/chart_demo b/cpp/apps/chart_demo
deleted file mode 160000
index 026f514b..00000000
--- a/cpp/apps/chart_demo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 026f514bb72d5fb00c57493ea09101a3d2cf4894
diff --git a/cpp/apps/shaders_lab b/cpp/apps/shaders_lab
deleted file mode 160000
index ab38127a..00000000
--- a/cpp/apps/shaders_lab
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit ab38127ac0d3dfe4d61aae2cbc3e99f74fac2dda