diff --git a/src/lib/diagnostics.ts b/src/lib/diagnostics.ts
index 89a1072..98aa1c4 100644
--- a/src/lib/diagnostics.ts
+++ b/src/lib/diagnostics.ts
@@ -35,6 +35,42 @@ export class AgentDataValidator {
                 }
                 break;
         }
+        
+        // 품질 점수화 (Quality Scoring) - Astra 피드백 반영
+        const score = QualityScorer.evaluate(data);
+        if (score < 50) {
+            logInfo(`[QualityWarning] ${stage} 결과 품질 낮음 (Score: ${score}). 내용 보강이 필요할 수 있습니다.`);
+        }
+    }
+}
+
+export class QualityScorer {
+    /**
+     * 수집된 데이터의 품질을 휴리스틱하게 점수화합니다 (0-100).
+     */
+    public static evaluate(data: string): number {
+        if (!data) return 0;
+        let score = 0;
+        
+        // 1. 길이 기반 점수 (최대 40점)
+        score += Math.min(40, data.length / 50);
+        
+        // 2. 구조화 기반 점수 (최대 30점)
+        if (data.includes('##') || data.includes('**') || data.includes('- ')) {
+            score += 30;
+        }
+        
+        // 3. 밀도/정보량 기반 점수 (최대 30점)
+        // 코드 블록이나 구체적 링크가 있으면 가산점
+        if (data.includes('```')) score += 15;
+        if (data.includes('[[') || data.includes('http')) score += 15;
+        
+        // 감점 요소: Placeholder 나 Empty 상태
+        if (data.includes('[Placeholder]') || data.includes('TODO')) {
+            score -= 20;
+        }
+        
+        return Math.max(0, Math.min(100, score));
     }
 }
 
diff --git a/src/lib/engine.ts b/src/lib/engine.ts
index 832d945..c830d59 100644
--- a/src/lib/engine.ts
+++ b/src/lib/engine.ts
@@ -1,4 +1,6 @@
 import * as vscode from 'vscode';
+import * as fs from 'fs';
+import * as path from 'path';
 import { lockManager } from '../core/lock';
 import { actionQueue } from '../core/queue';
 import { logInfo, logError } from '../utils';
@@ -61,6 +63,7 @@ export class MissionState {
     private _stage: PipelineStage = 'idle';
     private _auditTrail: AuditEntry[] = [];
     private _lastTransitionTime: number = Date.now();
+    private _failureReason?: string;
 
     public readonly missionId: string;
     public readonly startTime: number;
@@ -96,8 +99,35 @@ export class MissionState {
         this._lastTransitionTime = now;
 
         logInfo(`[MissionState] ${this.missionId}: ${entry.from} → ${entry.to} (${entry.durationFromPrev}ms) — ${message}`);
+        this.saveToDisk();
     }
 
+    /**
+     * 진행 상태를 디스크에 영구적으로 기록합니다 (State Save).
+     * 크래시 발생 시 어디까지 진행되었는지 파악하는 기초 데이터가 됩니다.
+     */
+    private saveToDisk(): void {
+        try {
+            const workspacePath = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath || '';
+            if (!workspacePath) return;
+
+            const astraDir = path.join(workspacePath, '.astra', 'missions');
+            if (!fs.existsSync(astraDir)) {
+                fs.mkdirSync(astraDir, { recursive: true });
+            }
+            const filePath = path.join(astraDir, `${this.missionId}.json`);
+            fs.writeFileSync(filePath, JSON.stringify(this.toStructuredLog(), null, 2), 'utf-8');
+        } catch (err) {
+            logError(`[MissionState] Failed to save state to disk for ${this.missionId}`, err);
+        }
+    }
+
+    public setFailureReason(reason: string): void {
+        this._failureReason = reason;
+        this.saveToDisk();
+    }
+
+
     /**
      * 전체 미션의 경과 시간을 반환합니다.
      */
@@ -137,6 +167,7 @@ export class MissionState {
             status: this._stage,
             startTime: new Date(this.startTime).toISOString(),
             totalElapsedMs: this.getElapsedMs(),
+            failureReason: this._failureReason,
             transitionCount: this._auditTrail.length,
             transitions: this._auditTrail.map(e => ({
                 from: e.from,
@@ -385,6 +416,11 @@ export class AgentEngine {
             
             this.transition('error', `오류 발생: ${error.message}`, onProgress);
             
+            // 실패 원인 명시적 기록 (Astra 피드백: Record failure reason)
+            if (this.state) {
+                this.state.setFailureReason(`[${type}] ${rule.description} - 세부원인: ${error.message}`);
+            }
+
             // Error Recovery Matrix 기반 세분화된 로깅
             switch (type) {
                 case ErrorType.ABORT: