diff --git a/server/src/agent/llm.ts b/server/src/agent/llm.ts
index 86563ac..371aa75 100644
--- a/server/src/agent/llm.ts
+++ b/server/src/agent/llm.ts
@@ -22,7 +22,8 @@ export interface LLMProvider {
   getAction(
     systemPrompt: string,
     userPrompt: string,
-    imageBase64?: string
+    imageBase64?: string,
+    signal?: AbortSignal
   ): Promise<string>;
 }
 
@@ -381,7 +382,8 @@ export function getLlmProvider(config: LLMConfig): LLMProvider {
     async getAction(
       systemPrompt: string,
       userPrompt: string,
-      imageBase64?: string
+      imageBase64?: string,
+      signal?: AbortSignal
     ): Promise<string> {
       const messages: Array<{ role: string; content: unknown }> = [
         { role: "system", content: systemPrompt },
@@ -418,6 +420,7 @@ export function getLlmProvider(config: LLMConfig): LLMProvider {
           max_tokens: 1024,
           response_format: { type: "json_object" },
         }),
+        signal,
       });
 
       if (!response.ok) {
diff --git a/server/src/agent/loop.ts b/server/src/agent/loop.ts
index 7cdcddf..d856a2e 100644
--- a/server/src/agent/loop.ts
+++ b/server/src/agent/loop.ts
@@ -489,9 +489,11 @@ export async function runAgentLoop(
         rawResponse = await llm.getAction(
           systemPrompt,
           userPrompt,
-          useScreenshot ? screenshot : undefined
+          useScreenshot ? screenshot : undefined,
+          signal
         );
       } catch (err) {
+        if (signal?.aborted) break;
         console.error(
           `[Agent ${sessionId}] LLM error at step ${step + 1}: ${(err as Error).message}`
         );
@@ -510,7 +512,8 @@ export async function runAgentLoop(
           rawResponse = await llm.getAction(
             systemPrompt,
             userPrompt + "\n\nIMPORTANT: Your previous response was not valid JSON. You MUST respond with ONLY a valid JSON object.",
-            useScreenshot ? screenshot : undefined
+            useScreenshot ? screenshot : undefined,
+            signal
           );
           parsed = parseJsonResponse(rawResponse);
         } catch {
@@ -634,6 +637,7 @@ export async function runAgentLoop(
       }
 
       // ── 10. Brief pause for UI to settle ────────────────────
+      if (signal?.aborted) break;
       await new Promise((r) => setTimeout(r, 500));
     }
   } catch (error) {