diff --git a/Dotnet.gitignore b/Dotnet.gitignore
index 44c52c90..b902b2fa 100644
--- a/Dotnet.gitignore
+++ b/Dotnet.gitignore
@@ -47,6 +47,9 @@ ScaffoldingReadMe.txt
 # NuGet Symbol Packages
 *.snupkg
 
+# dotenv environment variables file
+.env
+
 # Others
 ~$*
 *~
@@ -62,4 +65,4 @@ CodeCoverage/
 # NUnit
 *.VisualState.xml
 TestResult.xml
-nunit-*.xml
\ No newline at end of file
+nunit-*.xml
diff --git a/Global/JetBrains.gitignore b/Global/JetBrains.gitignore
index b5ec9817..4c695f98 100644
--- a/Global/JetBrains.gitignore
+++ b/Global/JetBrains.gitignore
@@ -92,3 +92,6 @@ http-client.private.env.json
 # Apifox Helper cache
 .idea/.cache/.Apifox_Helper
 .idea/ApifoxUploaderProjectSetting.xml
+
+# Github Copilot persisted session migrations, see: https://github.com/microsoft/copilot-intellij-feedback/issues/712#issuecomment-3322062215
+.idea/**/copilot.data.migration.*.xml