diff --git a/sonar-project.properties b/sonar-project.properties
index 8eab24b..dc98961 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -18,3 +18,16 @@ sonar.exclusions=.build*/**,**/_deps/**
 # CPD produces mostly false positives for this codebase. Since `sonar.cpd.skip=true`
 # does not work for C++ code, we use `sonar.cpd.exclusions=**/*` to effectively disable it.
 sonar.cpd.exclusions=**/*
+
+# Suppress selected SonarCloud issues (scope + rationale per entry):
+sonar.issue.ignore.multicriteria=e1,e2
+
+# e1 — cpp:S5145 (tainted input reaching an output sink), examples only: the demos read
+# input and print it back, which is the point of a demo, not an injection surface.
+sonar.issue.ignore.multicriteria.e1.ruleKey=cpp:S5145
+sonar.issue.ignore.multicriteria.e1.resourceKey=examples/**/*
+
+# e2 — cpp:S3659 (alternative operator tokens such as `not`), project-wide: deliberate
+# readability choice — `not ` (with the trailing space) is harder to overlook than `!`.
+sonar.issue.ignore.multicriteria.e2.ruleKey=cpp:S3659
+sonar.issue.ignore.multicriteria.e2.resourceKey=**/*