diff --git a/.github/workflows/sonarcloud.yml b/.github/workflows/sonarcloud.yml
index 7b756d7..e86a5d7 100644
--- a/.github/workflows/sonarcloud.yml
+++ b/.github/workflows/sonarcloud.yml
@@ -77,6 +77,13 @@ jobs:
             "/d:sonar.token=$SONAR_TOKEN"
             "/d:sonar.cs.opencover.reportsPaths=**/coverage.opencover.xml"
             "/d:sonar.cs.vstest.reportsPaths=**/TestResults/*.trx"
+            # Coverage scope must match what this job can actually measure: only
+            # backend .NET tests run here, so no coverage is supplied for the
+            # Angular frontend or the repo scripts. Without this, Sonar counts
+            # every TS/JS line as 0%-covered and any frontend PR fails the
+            # new-code coverage gate. Generated EF migration scaffolding is
+            # excluded too (see coverlet.runsettings); migration Up/Down stays.
+            "/d:sonar.coverage.exclusions=**/*.ts,**/*.js,**/*.mjs,**/*.html,**/*.scss,**/*.css,**/Migrations/*.Designer.cs,**/Migrations/*ModelSnapshot.cs"
           )
           if [ "$GITHUB_EVENT_NAME" = "pull_request" ]; then
             args+=(
diff --git a/coverlet.runsettings b/coverlet.runsettings
index 81ebdf2..c8545d8 100644
--- a/coverlet.runsettings
+++ b/coverlet.runsettings
@@ -7,6 +7,15 @@
           <Format>cobertura,lcov,opencover</Format>
           <Exclude>[*.Tests]*,[SplitIt.Shared]*</Exclude>
           <ExcludeByAttribute>Obsolete,GeneratedCodeAttribute,CompilerGeneratedAttribute</ExcludeByAttribute>
+          <!--
+            EF Core migration scaffolding is auto-generated and applied verbatim by
+            the integration-test fixture (DatabaseFixture), so coverlet reports it
+            as ~100% covered and it dominates the denominator (it used to be ~89%
+            of all coverable lines, inflating this gate to ~97%). Exclude only the
+            generated Designer/snapshot files; migration Up/Down logic stays in
+            scope. Mirrors sonar.coverage.exclusions in .github/workflows/sonarcloud.yml.
+          -->
+          <ExcludeByFile>**/Migrations/*.Designer.cs,**/Migrations/*ModelSnapshot.cs</ExcludeByFile>
           <Threshold>70</Threshold>
           <ThresholdType>line</ThresholdType>
           <ThresholdStat>total</ThresholdStat>