diff --git a/src/chat/chat.controller.ts b/src/chat/chat.controller.ts
index 6413a7e..eddc7bf 100644
--- a/src/chat/chat.controller.ts
+++ b/src/chat/chat.controller.ts
@@ -21,6 +21,11 @@ export class ChatController {
     return this.chatService.clearStudentThreads(this.getBearerToken(request), query);
   }
 
+  @Delete('threads/:threadId')
+  deleteThread(@Req() request: Request, @Param('threadId') threadId: string) {
+    return this.chatService.deleteStudentThread(this.getBearerToken(request), threadId);
+  }
+
   @Post('messages')
   createMessage(
     @Req() request: Request,
diff --git a/src/chat/chat.service.ts b/src/chat/chat.service.ts
index ae8501d..eaf4322 100644
--- a/src/chat/chat.service.ts
+++ b/src/chat/chat.service.ts
@@ -88,9 +88,9 @@ export class ChatService {
       where: {
         courseId: course.id,
         studentId: student.id,
-        weekId: week?.id,
+        weekId: week?.id ?? null,
         type: query.mode ? this.toThreadType(query.mode) : undefined,
-        status: { not: ChatThreadStatus.ARCHIVED },
+        status: query.includeArchived ? undefined : { not: ChatThreadStatus.ARCHIVED },
       },
       orderBy: { lastMessageAt: 'desc' },
       include: {
@@ -131,7 +131,7 @@ export class ChatService {
       where: {
         courseId: course.id,
         studentId: student.id,
-        weekId: week?.id,
+        weekId: week?.id ?? null,
         type: query.mode ? this.toThreadType(query.mode) : undefined,
         status: { not: ChatThreadStatus.ARCHIVED },
       },
@@ -143,6 +143,25 @@ export class ChatService {
     return { deletedCount: result.count };
   }
 
+  async deleteStudentThread(accessToken: string | undefined, threadId: string) {
+    const student = await this.getLmsUser(accessToken);
+    const thread = await this.prisma.chatThread.findFirst({
+      where: {
+        id: threadId,
+        studentId: student.id,
+        type: ChatThreadType.AI,
+      },
+      select: { id: true },
+    });
+
+    if (!thread) {
+      throw new NotFoundException('대화 내역을 찾을 수 없습니다.');
+    }
+
+    await this.prisma.chatThread.delete({ where: { id: thread.id } });
+    return { id: thread.id };
+  }
+
   async createStudentMessage(
     accessToken: string | undefined,
     dto: CreateChatMessageDto,
@@ -247,6 +266,9 @@ export class ChatService {
     const model = aiProvider === 'futuredrive'
       ? this.configService.get<string>('FUTUREDRIVE_LLM_MODEL', 'futuredrive-llm')
       : this.configService.get<string>('OPENAI_CHAT_MODEL', 'gpt-4.1-nano');
+    const curriculumContext = dto.contextWeek
+      ? await this.getCurriculumContext(course.id, dto.contextWeek)
+      : null;
 
     try {
       const aiResponse = await this.requestAiChatCompletion(
@@ -258,6 +280,7 @@ export class ChatService {
               : ('assistant' as const),
           content: message.content,
         })),
+        curriculumContext,
       );
       const currentStudentMessage = await this.prisma.chatMessage.findUnique({
         where: { id: studentMessage.id },
@@ -309,6 +332,7 @@ export class ChatService {
 
       return {
         threadId: thread.id,
+        threadTitle: thread.title,
         message: this.serializeMessage(assistantMessage),
         content: assistantMessage.content,
       };
@@ -700,7 +724,7 @@ export class ChatService {
         studentId: input.studentId,
         type: input.type,
         status: input.status,
-        title: input.firstMessage.slice(0, 80),
+        title: this.makeThreadTitle(input.firstMessage),
       },
     });
   }
@@ -760,17 +784,21 @@ export class ChatService {
   private async requestAiChatCompletion(
     model: string,
     messages: Array<{ role: 'user' | 'assistant'; content: string }>,
+    curriculumContext?: string | null,
   ) {
     const provider = this.configService.get<string>('AI_PROVIDER', 'openai').trim().toLowerCase();
     if (provider === 'futuredrive') {
-      return this.requestFutureDriveLlmChatCompletion(messages);
+      return this.requestFutureDriveLlmChatCompletion(curriculumContext
+        ? [{ role: 'user', content: curriculumContext }, ...messages]
+        : messages);
     }
-    return this.requestOpenAiChatCompletion(model, messages);
+    return this.requestOpenAiChatCompletion(model, messages, curriculumContext);
   }
 
   private async requestOpenAiChatCompletion(
     model: string,
     messages: Array<{ role: 'user' | 'assistant'; content: string }>,
+    curriculumContext?: string | null,
   ) {
     const apiKey = this.configService.get<string>('OPENAI_API_KEY');
     if (!apiKey) {
@@ -792,7 +820,7 @@ export class ChatService {
           {
             role: 'system',
             content:
-              '당신은 자율주행 교육용 ROS2, SLAM 실습을 돕는 한국어 AI 챗봇입니다. 답변은 짧고 실습자가 바로 따라 할 수 있게 명확하게 작성하세요.',
+              `당신은 자율주행 교육용 ROS2, SLAM 실습을 돕는 한국어 AI 챗봇입니다. 답변은 짧고 실습자가 바로 따라 할 수 있게 명확하게 작성하세요.${curriculumContext ? `\n\n${curriculumContext}` : ''}`,
           },
           ...messages,
         ],
@@ -867,6 +895,41 @@ export class ChatService {
     return mode === 'ai' ? ChatThreadType.AI : ChatThreadType.INSTRUCTOR;
   }
 
+  private async getCurriculumContext(courseId: string, weekNumber: number): Promise<string | null> {
+    const week = await this.prisma.courseWeek.findUnique({
+      where: { courseId_week: { courseId, week: weekNumber } },
+      include: {
+        topics: { orderBy: { sortOrder: 'asc' }, select: { title: true, detail: true } },
+        practices: { orderBy: { sortOrder: 'asc' }, select: { title: true, description: true } },
+        references: { orderBy: { sortOrder: 'asc' }, select: { kind: true, title: true } },
+      },
+    });
+    if (!week) return null;
+
+    const lines = [
+      `[현재 선택된 커리큘럼 정보]`,
+      `${week.week}주차: ${week.title}`,
+      `개요: ${week.overview}`,
+      week.topics.length ? `학습 단계:\n${week.topics.map((topic, index) => `${index + 1}. ${topic.title}${topic.detail ? ` - ${topic.detail}` : ''}`).join('\n')}` : null,
+      week.practices.length ? `실습 내용:\n${week.practices.map((practice, index) => `${index + 1}. ${practice.title} - ${practice.description}`).join('\n')}` : null,
+      `제출 기준: ${week.deliverable}`,
+      week.references.length ? `참고 자료: ${week.references.map((reference) => `${reference.title} (${reference.kind})`).join(', ')}` : null,
+      `위 정보는 사용자가 빠른 질문으로 요청한 현재 주차의 공식 커리큘럼입니다. 정보에 근거해 답변하고, 없는 내용은 추측하지 마세요.`,
+    ].filter(Boolean).join('\n\n');
+
+    return lines.slice(0, 12000);
+  }
+
+  private makeThreadTitle(content: string): string {
+    const normalized = content.replace(/\s+/g, ' ').trim();
+    const concise = normalized
+      .replace(/^(현재|이번|이)\s*(주차|학습|실습)\s*(에서|의)?\s*/i, '')
+      .replace(/(알려\s*줘|설명해\s*줘|정리해\s*줘|도와\s*줘|궁금해요|인가요|인가요\?)$/i, '')
+      .trim();
+    const source = concise || normalized || '새 대화';
+    return source.length > 42 ? `${source.slice(0, 42).trimEnd()}...` : source;
+  }
+
   private serializeThread(
     thread: Prisma.ChatThreadGetPayload<{
       include: {
diff --git a/src/chat/dto/create-ai-response.dto.ts b/src/chat/dto/create-ai-response.dto.ts
index c305dca..3b57ec6 100644
--- a/src/chat/dto/create-ai-response.dto.ts
+++ b/src/chat/dto/create-ai-response.dto.ts
@@ -9,4 +9,10 @@ export class CreateAiResponseDto {
   @Min(1)
   @Max(100)
   week?: number;
+
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Max(100)
+  contextWeek?: number;
 }
diff --git a/src/chat/dto/list-chat-threads.dto.ts b/src/chat/dto/list-chat-threads.dto.ts
index d08b2d2..4b61dae 100644
--- a/src/chat/dto/list-chat-threads.dto.ts
+++ b/src/chat/dto/list-chat-threads.dto.ts
@@ -1,5 +1,5 @@
 import { Transform } from 'class-transformer';
-import { IsIn, IsInt, IsOptional, Max, Min } from 'class-validator';
+import { IsBoolean, IsIn, IsInt, IsOptional, Max, Min } from 'class-validator';
 
 export class ListChatThreadsDto {
   @IsOptional()
@@ -12,4 +12,9 @@ export class ListChatThreadsDto {
   @Min(1)
   @Max(100)
   week?: number;
+
+  @IsOptional()
+  @Transform(({ value }) => value === true || value === 'true')
+  @IsBoolean()
+  includeArchived?: boolean;
 }