diff --git a/.github/actions/ci-success/lib/monitor.mjs b/.github/actions/ci-success/lib/monitor.mjs
index 3b7f56c..e87178d 100644
--- a/.github/actions/ci-success/lib/monitor.mjs
+++ b/.github/actions/ci-success/lib/monitor.mjs
@@ -49,8 +49,9 @@ function compileIgnorePatterns(patterns) {
 }
 
 function getInput(env, name, defaultValue) {
-  const key = `INPUT_${name.replace(/ /gu, '_').replace(/-/gu, '_').toUpperCase()}`;
-  const value = env[key];
+  const normalizedKey = `INPUT_${name.replace(/ /gu, '_').replace(/-/gu, '_').toUpperCase()}`;
+  const rawKey = `INPUT_${name.replace(/ /gu, '_').toUpperCase()}`;
+  const value = env[normalizedKey] ?? env[rawKey];
   return value == null || value === '' ? defaultValue : value;
 }
 
diff --git a/.github/actions/ci-success/test/monitor.test.mjs b/.github/actions/ci-success/test/monitor.test.mjs
index 9a52190..d0631ac 100644
--- a/.github/actions/ci-success/test/monitor.test.mjs
+++ b/.github/actions/ci-success/test/monitor.test.mjs
@@ -39,6 +39,14 @@ test('buildOptions reads inputs from the provided environment', () => {
   assert.equal(options.timeoutMs, 15_000);
 });
 
+test('buildOptions supports hyphenated action input keys from GitHub runtime', () => {
+  const options = buildOptions({
+    'INPUT_GITHUB-TOKEN': 'hyphen-token',
+  });
+
+  assert.equal(options.githubToken, 'hyphen-token');
+});
+
 test('evaluateObservedChecks fails when any completed check fails', () => {
   const result = evaluateObservedChecks(
     [