diff --git a/changes/split-main-runtime-modules.md b/changes/split-main-runtime-modules.md
new file mode 100644
index 00000000..5a756ff1
--- /dev/null
+++ b/changes/split-main-runtime-modules.md
@@ -0,0 +1,4 @@
+type: internal
+area: runtime
+
+- Split main-process runtime wiring into focused modules without changing user-facing behavior.