diff --git a/package-lock.json b/package-lock.json
index 1951cdc..069a2e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "astra",
-  "version": "2.80.2",
+  "version": "2.80.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "astra",
-      "version": "2.80.2",
+      "version": "2.80.3",
       "license": "MIT",
       "dependencies": {
         "marked": "^18.0.2",
diff --git a/package.json b/package.json
index 8281e14..37ab76d 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "astra",
   "displayName": "Astra",
   "description": "The personal intelligence layer for Antigravity and VS Code. A private cognitive partner for deep project context, memory, and proactive strategic decision-making.",
-  "version": "2.80.2",
+  "version": "2.80.3",
   "publisher": "g1nation",
   "license": "MIT",
   "icon": "assets/icon.png",
diff --git a/src/agent.ts b/src/agent.ts
index c190604..2f94abf 100644
--- a/src/agent.ts
+++ b/src/agent.ts
@@ -403,7 +403,13 @@ export class AgentExecutor {
                 "- [충돌] 지식 간 충돌 발생 시 시스템이 독단적으로 판단하지 말고, 반드시 [CONFLICT WARNING] 플래그와 함께 상충되는 두 관점을 모두 명시하여 사용자에게 판단을 위임할 것."
             ].join('\n');
 
-            const fullSystemPrompt = `${agentSkillCtx}\n\n${systemPrompt}${internetCtx}${memoryCtx}${designerCtx}${localProjectKnowledgeCtx}${thinkingPartnerCtx}${astraStanceCtx}${secondBrainTraceCtx}${v4PolicyCtx}\n\n[CONTEXT]\n${brainContext}${brainInventoryCtx}\n${contextBlock}${negativeCtx}`;
+            // [Critical Fix] 에이전트 스킬이 있을 경우 기본 포맷(## 요약/상세 설명)보다 에이전트 프롬프트를 우선시하도록 지시
+            let coreSystemPrompt = systemPrompt;
+            if (options.agentSkillContext) {
+                coreSystemPrompt = `${systemPrompt}\n\n[SELECTED AGENT MODE ACTIVE]\nYou are now operating in a specialized Agent Mode. The instructions below take ABSOLUTE PRECEDENCE over your default persona and default output formats (like ## 요약, ## 상세 설명). Follow the format and role specified in the selected agent mode strictly.\n${agentSkillCtx}`;
+            }
+
+            const fullSystemPrompt = `${coreSystemPrompt}${internetCtx}${memoryCtx}${designerCtx}${localProjectKnowledgeCtx}${thinkingPartnerCtx}${astraStanceCtx}${secondBrainTraceCtx}${v4PolicyCtx}\n\n[CONTEXT]\n${brainContext}${brainInventoryCtx}\n${contextBlock}${negativeCtx}`;
             const messagesForRequest: ChatMessage[] = [
                 { role: 'system', content: fullSystemPrompt, internal: true },
                 ...reqMessages