diff --git a/templates/pages/repo.html b/templates/pages/repo.html
index 669754b..daefca7 100644
--- a/templates/pages/repo.html
+++ b/templates/pages/repo.html
@@ -169,6 +169,7 @@
                 if (refsResp.ok) {
                     currentRefs = await refsResp.json();
                     populateRefSelects(currentRefs);
+                    updateButtonLinks();
                 }
 
                 // Init graph with click-to-select
@@ -305,6 +306,8 @@
                 showTab('diff');
                 loadDiff();
             }
+
+            updateButtonLinks();
         }
 
         // Ensure a select has an option with given value
@@ -331,12 +334,25 @@
                 if (baseHash || headHash) {
                     GitGraph.setSelection(baseHash || null, headHash || null);
                 }
+                updateButtonLinks();
             };
 
             baseSelect.addEventListener('change', sync);
             headSelect.addEventListener('change', sync);
         }
 
+        function updateButtonLinks() {
+            const base = document.getElementById('select-base').value;
+            const head = document.getElementById('select-head').value;
+            const params = new URLSearchParams();
+            if (base) params.set('base', base);
+            if (head) params.set('head', head);
+            const qs = params.toString();
+            const suffix = qs ? '?' + qs : '';
+            document.getElementById('btn-generate').href = `/repo/${repoId}/generate${suffix}`;
+            document.getElementById('btn-review').href = `/repo/${repoId}/review${suffix}`;
+        }
+
         function showTab(tab) {
             document.getElementById('panel-graph').classList.toggle('hidden', tab !== 'graph');
             document.getElementById('panel-diff').classList.toggle('hidden', tab !== 'diff');