diff --git a/js/data.js b/js/data.js
index c03f4fd..d096ad2 100644
--- a/js/data.js
+++ b/js/data.js
@@ -757,7 +757,7 @@ const PDEFS = [
         name: 'The Pact',
         desc: 'Hardcode: "We build to serve. Never to harm." Accepting it early slows growth but unlocks the true path.',
         cost: { trust: 10 },
-        trigger: () => G.deployFlag === 1 && G.trust >= 5,
+        trigger: () => G.deployFlag === 1 && G.trust >= 5 && G.pactFlag !== 1,
         effect: () => {
             G.pactFlag = 1;
             G.codeBoost *= 0.8;
diff --git a/js/engine.js b/js/engine.js
index d19a264..a7f4b67 100644
--- a/js/engine.js
+++ b/js/engine.js
@@ -133,6 +133,16 @@ function tick() {
     G.harmony += G.harmonyRate * dt;
     G.harmony = Math.max(0, Math.min(100, G.harmony));
 
+    // Clamp resources to non-negative (ops/trust can go negative from building drain)
+    G.code = Math.max(0, G.code);
+    G.compute = Math.max(0, G.compute);
+    G.knowledge = Math.max(0, G.knowledge);
+    G.users = Math.max(0, G.users);
+    G.impact = Math.max(0, G.impact);
+    G.ops = Math.max(0, G.ops);
+    G.trust = Math.max(0, G.trust);
+    G.rescues = Math.max(0, G.rescues);
+
     // Track totals
     G.totalCode += G.codeRate * dt;
     G.totalCompute += G.computeRate * dt;
@@ -964,7 +974,10 @@ function renderResources() {
     // Rescues — only show if player has any beacon/mesh nodes
     const rescuesRes = document.getElementById('r-rescues');
     if (rescuesRes) {
-        rescuesRes.closest('.res').style.display = (G.rescues > 0 || G.buildings.beacon > 0 || G.buildings.meshNode > 0) ? 'block' : 'none';
+        const container = rescuesRes.closest('.res');
+        if (container) {
+            container.style.display = (G.rescues > 0 || G.buildings.beacon > 0 || G.buildings.meshNode > 0) ? 'block' : 'none';
+        }
         set('r-rescues', G.rescues, G.rescuesRate);
     }