diff --git a/.gitignore b/.gitignore
index 79866888e..45ad705fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,12 @@ rusty-tags.*
 .cproject
 .project
 
+# Clangd creates this to cache its results
+.cache/
+
+# The code cache is a transient file.
+compile_commands.json
+
 # Compiled python modules.
 *.pyc
 
diff --git a/Cargo.toml b/Cargo.toml
index 185777f57..cb071db4d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 members = ["sim"]
 exclude = ["ptest"]
 resolver = "2"
+default-members = ["sim"]
 
 # The simulator runs very slowly without optimization.  A value of 1
 # compiles in about half the time, but runs about 5-6 times slower.  2
diff --git a/docs/release-notes.d/vscode.md b/docs/release-notes.d/vscode.md
new file mode 100644
index 000000000..df4fea82d
--- /dev/null
+++ b/docs/release-notes.d/vscode.md
@@ -0,0 +1,2 @@
+- A few changes to make vscode nicer, including a default package to build at
+  the top level, and ignoring some of the cache files from vscode.