diff --git a/deno.json b/deno.json
index a9509f4..9657e22 100644
--- a/deno.json
+++ b/deno.json
@@ -24,7 +24,7 @@
   ],
   "imports": {
     "$fresh/": "https://deno.land/x/fresh@1.7.3/",
-    "@swanfactory/hclang": "jsr:@swanfactory/hclang@^0.6.9",
+    "@swanfactory/hclang": "jsr:@swanfactory/hclang@^0.7.1",
     "preact": "https://esm.sh/preact@10.22.0",
     "preact/": "https://esm.sh/preact@10.22.0/",
     "@preact/signals": "https://esm.sh/*@preact/signals@1.2.2",
diff --git a/islands/Interpreter.tsx b/islands/Interpreter.tsx
index 8393ae2..f95397b 100644
--- a/islands/Interpreter.tsx
+++ b/islands/Interpreter.tsx
@@ -1,11 +1,17 @@
-import { useState } from "preact/hooks";
-// import { execute } from "@swanfactory/hclang";
+import { useState, useEffect } from "preact/hooks";
+import { execute } from "@swanfactory/hclang";
+
+interface HistoryItem {
+  code: string;
+  result: string;
+  timestamp: number;
+}
 
 function evaluateCode(code: string): string {
   console.log(`Evaluating code: ${code}`);
-  // console.log(execute);
+  console.log(execute);
   try {
-    const result = code.toUpperCase();
+    const result = execute(code);
     console.log(`Result: ${result}`);
     return result.toString();
   } catch (error: unknown) {
@@ -19,13 +25,40 @@ export default function Interpreter() {
   const [error, setError] = useState<string>("");
   const [isLoading, setIsLoading] = useState<boolean>(false);
   const [result, setResult] = useState<string>("");
+  const [history, setHistory] = useState<HistoryItem[]>([]);
+
+  useEffect(() => {
+    const savedHistory = localStorage.getItem('hc-history');
+    if (savedHistory) {
+      setHistory(JSON.parse(savedHistory));
+    }
+  }, []);
 
   const handleEvaluation = (code: string): void => {
     setError("");
     setIsLoading(true);
     try {
-      const evalResult = evaluateCode(code);
+      // Build context from history
+      const context = history
+        .map(item => item.code)
+        .reverse()
+        .join("\n");
+      
+      // Combine history with new code
+      const fullCode = context ? `${context}\n${code}` : code;
+      
+      const evalResult = evaluateCode(fullCode);
       setResult(evalResult);
+      
+      const newHistoryItem = {
+        code,
+        result: evalResult,
+        timestamp: Date.now()
+      };
+      
+      const updatedHistory = [newHistoryItem, ...history].slice(0, 50); // Keep last 50 items
+      setHistory(updatedHistory);
+      localStorage.setItem('hc-history', JSON.stringify(updatedHistory));
     } catch (e: unknown) {
       setError(e instanceof Error ? e.message : String(e));
     } finally {
@@ -33,6 +66,18 @@ export default function Interpreter() {
     }
   };
 
+  const handleHistoryClick = (historyItem: HistoryItem) => {
+    setText((prev) => prev + "\n" + historyItem.code);
+  };
+
+  const clearHistory = () => {
+    setHistory([]);
+    setText("");
+    setResult("");
+    setError("");
+    localStorage.removeItem('hc-history');
+  };
+
   return (
     <div>
       <textarea
@@ -55,6 +100,37 @@ export default function Interpreter() {
           </div>
         )}
       </div>
+      <div style={{ marginTop: "20px" }}>
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center" }}>
+          <h3>History</h3>
+          <button 
+            onClick={clearHistory}
+            style={{ padding: "4px 8px" }}
+          >
+            Clear History
+          </button>
+        </div>
+        <div style={{ maxHeight: "200px", overflowY: "auto" }}>
+          {history.map((item, index) => (
+            <div 
+              key={item.timestamp}
+              onClick={() => handleHistoryClick(item)}
+              style={{ 
+                cursor: "pointer", 
+                padding: "8px",
+                margin: "4px",
+                border: "1px solid #ccc",
+                borderRadius: "4px"
+              }}
+            >
+              <pre style={{ margin: 0 }}>{item.code}</pre>
+              <small style={{ color: "#666" }}>
+                {new Date(item.timestamp).toLocaleString()}
+              </small>
+            </div>
+          ))}
+        </div>
+      </div>
     </div>
   );
 }