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如果说传统 AI 就像患有“健忘症”的专家,每次对话都要重新开始,那么 MCP 的上下文管理就是给 AI 装上了“永久记忆”。这不只是技术升级,而是 AI 从“对话工具”迈向“工作伙伴”的关键一步。
但复杂的企业对话往往需要:
为了优雅地解决这些问题,我们需要引入 基于 MCP 的智慧化上下文管理技术,下文我们详细剖析之。
MCP 建立了一个三层记忆架构,模拟人类的记忆模式:
a.当前对话内容
b.近期操作记录
c.暂时工作状态
a.项目相关上下文
b.任务执行状态
c.决策历程记录
a.历史对话摘要
b.学习模式记录
c.知识库累积
会话生命周期:
class MCPSessionManager:
def __init__(self):
self.sessions = {}
self.context_store = PersistentContextStore()
async def create_session(self, user_id: str, project_id: str = None):
"""建立新的工作会话"""
session_id = str(uuid.uuid4())
session = MCPSession(
id=session_id,
user_id=user_id,
project_id=project_id,
created_at=datetime.now(),
context_window=ContextWindow(max_tokens=150000),
persistent_memory=await self._load_persistent_context(user_id, project_id),
working_memory=WorkingMemory()
)
self.sessions[session_id] = session
return session
async def restore_session(self, session_id: str):
"""恢复之前的会话状态"""
if session_id in self.sessions:
return self.sessions[session_id]
# 从持久化存储恢复
session_data = await self.context_store.load_session(session_id)
if session_data:
session = MCPSession.from_dict(session_data)
self.sessions[session_id] = session
return session
return None
重要性评分机制:
class ContextImportanceEvaluator:
def __init__(self):
self.importance_factors = {
'decision_made': 1.0,
'error_encountered': 0.9,
'requirement_defined': 0.8,
'progress_milestone': 0.7,
'general_discussion': 0.3
}
def evaluate_context_importance(self, context_item: dict) -> float:
"""评估上下文项目的重要性"""
importance = 0.0
# 基于内容类型评分
content_type = context_item.get('type', 'general_discussion')
importance += self.importance_factors.get(content_type, 0.3)
# 基于引用频率评分
reference_count = context_item.get('reference_count', 0)
importance += min(reference_count * 0.1, 0.5)
# 基于时间衰减
age_days = (datetime.now() - context_item['created_at']).days
time_decay = max(0.1, 1.0 - (age_days * 0.02))
importance *= time_decay
return min(importance, 1.0)
async def compress_context(self, context_items: List[dict], target_tokens: int):
"""智能化压缩上下文到目标大小"""
# 评估所有项目的重要性
scored_items = []
for item in context_items:
score = self.evaluate_context_importance(item)
scored_items.append((score, item))
# 按重要性排序
scored_items.sort(key=lambda x: x[0], reverse=True)
# 选择最重要的项目直到达到目标大小
selected_items = []
current_tokens = 0
for score, item in scored_items:
item_tokens = self._estimate_tokens(item['content'])
if current_tokens + item_tokens <= target_tokens:
selected_items.append(item)
current_tokens += item_tokens
else:
break
return selected_items
MCP Memory Keeper 是一个专门为 Claude Code 设计的上下文持久化服务,解决了 AI 编程助手的记忆问题。
核心功能:
数据模型设计:
-- 会话管理表
CREATE TABLE sessions (
id TEXT PRIMARY KEY,
name TEXT NOT NULL,
description TEXT,
project_dir TEXT,
default_channel TEXT,
created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
continued_from TEXT,
FOREIGN KEY (continued_from) REFERENCES sessions(id)
);
-- 上下文项目表
CREATE TABLE context_items (
id TEXT PRIMARY KEY,
session_id TEXT NOT NULL,
channel TEXT,
key TEXT NOT NULL,
value TEXT NOT NULL,
category TEXT DEFAULT 'general',
priority TEXT DEFAULT 'normal',
created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
reference_count INTEGER DEFAULT 0,
FOREIGN KEY (session_id) REFERENCES sessions(id)
);
-- 文件缓存表
CREATE TABLE file_cache (
id TEXT PRIMARY KEY,
session_id TEXT NOT NULL,
file_path TEXT NOT NULL,
content_hash TEXT NOT NULL,
cached_at DATETIME DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (session_id) REFERENCES sessions(id)
);
API 接口设计 :
interface MCPMemoryKeeper {
// 会话管理
sessionStart(params: {
name: string;
description?: string;
projectDir?: string;
defaultChannel?: string;
continueFrom?: string;
}): Promise<SessionInfo>;
sessionList(params: { limit?: number }): Promise<SessionInfo[]>;
// 上下文操作
contextSave(params: {
key: string;
value: string;
category?: 'task' | 'decision' | 'progress' | 'note';
priority?: 'high' | 'normal' | 'low';
channel?: string;
}): Promise<void>;
contextGet(params: {
key?: string;
category?: string;
priority?: string;
channel?: string;
limit?: number;
}): Promise<ContextItem[]>;
// 文件管理
cacheFile(params: {
filePath: string;
content: string;
}): Promise<void>;
fileChanged(params: {
filePath: string;
currentContent: string;
}): Promise<boolean>;
// 状态查询
status(): Promise<SessionStatus>;
}
开发工作流程:
# 1. 开始新的开发会话
await mcp_context_session_start({
name: 'User Authentication Feature',
description: 'Implementing OAuth 2.0 authentication system',
projectDir: '/home/dev/myapp',
defaultChannel: 'auth-feature'
});
# 2. 记录重要决策
await mcp_context_save({
key: 'auth_strategy',
value: 'Using JWT tokens with 15-minute expiry and refresh tokens',
category: 'decision',
priority: 'high'
});
# 3. 追踪进度
await mcp_context_save({
key: 'current_progress',
value: 'Completed user model, working on authentication middleware',
category: 'progress',
priority: 'normal'
});
# 4. 缓存重要文件
await mcp_context_cache_file({
filePath: 'src/models/user.ts',
content: userModelContent
});
# 5. 会话恢复后取得上下文
const decisions = await mcp_context_get({
category: 'decision',
priority: 'high'
});
const progress = await mcp_context_get({
category: 'progress'
});
class EnterpriseContextManager:
def __init__(self):
self.l1_cache = InMemoryCache(ttl=300) # 5分钟内存缓存
self.l2_cache = RedisCache(ttl=3600) # 1小时 Redis 缓存
self.l3_storage = PostgreSQLStorage() # 永久数据库存储
self.backup_storage = S3BackupStorage() # 云端备份
async def save_context(self, session_id: str, context: dict):
"""多层存储上下文"""
# L1: 内存缓存(最快访问)
await self.l1_cache.set(f"ctx:{session_id}", context)
# L2: Redis 缓存(跨服务共享)
await self.l2_cache.set(f"ctx:{session_id}", context)
# L3: 数据库存储(持久化)
await self.l3_storage.save_context(session_id, context)
# 定期备份到云端
if self._should_backup(context):
await self.backup_storage.backup_context(session_id, context)
async def load_context(self, session_id: str) -> dict:
"""智能化载入上下文"""
# 尝试从最快的存储层开始
context = await self.l1_cache.get(f"ctx:{session_id}")
if context:
return context
context = await self.l2_cache.get(f"ctx:{session_id}")
if context:
# 回填到 L1
await self.l1_cache.set(f"ctx:{session_id}", context)
return context
context = await self.l3_storage.load_context(session_id)
if context:
# 回填到缓存层
await self.l2_cache.set(f"ctx:{session_id}", context)
await self.l1_cache.set(f"ctx:{session_id}", context)
return context
return {}
class ContextSynchronizer:
def __init__(self):
self.sync_queue = asyncio.Queue()
self.conflict_resolver = ConflictResolver()
async def sync_context_across_devices(self, user_id: str):
"""跨设备同步上下文"""
devices = await self.get_user_devices(user_id)
for device in devices:
local_context = await self.get_device_context(device.id)
remote_context = await self.get_remote_context(user_id)
if self._has_conflicts(local_context, remote_context):
resolved_context = await self.conflict_resolver.resolve(
local_context,
remote_context
)
else:
resolved_context = self._merge_contexts(
local_context,
remote_context
)
await self.update_device_context(device.id, resolved_context)
await self.update_remote_context(user_id, resolved_context)
**背景:**某大型银行需要 AI 客服能记住客户的完整服务历程。
实现:
class BankingContextManager:
async def handle_customer_interaction(self, customer_id: str, message: str):
# 载入客户历史上下文
customer_context = await self.load_customer_context(customer_id)
# 包含:
# - 过去 30 天的服务记录
# - 产品使用状况
# - 投诉和建议历史
# - 个性化偏好设置
# 处理当前请求
response = await self.ai_service.process_with_context(
message,
customer_context
)
# 更新上下文
await self.update_customer_context(
customer_id,
{
'latest_interaction': message,
'ai_response': response,
'satisfaction_score': await self.detect_satisfaction(response),
'timestamp': datetime.now()
}
)
return response
**背景:**台积电等半导体厂需要 AI 记住每台设备的完整维护历程。
实现:
class EquipmentMaintenanceContext:
async def analyze_equipment_issue(self, equipment_id: str, sensor_data: dict):
# 载入设备上下文
equipment_context = await self.load_equipment_history(equipment_id)
# 包含:
# - 历史故障模式
# - 维护记录
# - 效能趋势
# - 相似设备经验
# AI 分析
analysis = await self.ai_diagnostic.analyze_with_context(
sensor_data,
equipment_context
)
# 更新设备学习记录
await self.update_equipment_context(
equipment_id,
{
'latest_analysis': analysis,
'sensor_snapshot': sensor_data,
'maintenance_action': analysis.recommended_action,
'timestamp': datetime.now()
}
)
return analysis
class ContextPreloader:
def __init__(self):
self.usage_predictor = UsagePatternPredictor()
async def predictive_preload(self, user_id: str):
"""基于使用模式预加载上下文"""
# 分析使用者模式
patterns = await self.usage_predictor.analyze_user_patterns(user_id)
# 预测可能需要的上下文
likely_contexts = await self.predict_needed_contexts(patterns)
# 预加载到缓存
for context_key in likely_contexts:
await self.preload_to_cache(context_key)
class AdaptiveContextCompressor:
def __init__(self):
self.compression_strategies = {
'high_importance': SummaryCompressor(),
'medium_importance': KeyPointExtractor(),
'low_importance': TimestampOnlyCompressor()
}
async def adaptive_compress(self, context_items: List[dict], target_size: int):
"""动态选择压缩策略"""
compressed_items = []
remaining_size = target_size
# 按重要性分组
grouped_items = self._group_by_importance(context_items)
for importance_level, items in grouped_items.items():
compressor = self.compression_strategies[importance_level]
if remaining_size > 0:
compressed = await compressor.compress(items, remaining_size)
compressed_items.extend(compressed)
remaining_size -= self._calculate_size(compressed)
return compressed_items
class SecureContextStorage:
def __init__(self, encryption_key: bytes):
self.cipher = Fernet(encryption_key)
async def encrypt_context(self, context: dict) -> bytes:
"""加密上下文数据"""
serialized = json.dumps(context).encode('utf-8')
encrypted = self.cipher.encrypt(serialized)
return encrypted
async def decrypt_context(self, encrypted_data: bytes) -> dict:
"""解密上下文数据"""
decrypted = self.cipher.decrypt(encrypted_data)
context = json.loads(decrypted.decode('utf-8'))
return context
class PrivacyProtectedContext:
def __init__(self):
self.pii_detector = PIIDetector()
self.anonymizer = DataAnonymizer()
async def sanitize_context(self, context: dict) -> dict:
"""清理敏感信息"""
# 检测个人敏感信息
pii_items = await self.pii_detector.detect(context)
# 匿名化处理
sanitized_context = await self.anonymizer.anonymize(
context,
pii_items
)
return sanitized_context
class ContextAnalytics:
def __init__(self):
self.metrics_collector = MetricsCollector()
async def analyze_context_usage(self, session_id: str):
"""分析上下文使用效率"""
metrics = {
'context_hit_rate': await self._calculate_hit_rate(session_id),
'compression_ratio': await self._calculate_compression_ratio(session_id),
'retrieval_latency': await self._calculate_retrieval_latency(session_id),
'storage_efficiency': await self._calculate_storage_efficiency(session_id)
}
return metrics
MCP 的上下文管理与持久化技术不只是解决了 AI 的“健忘症”,更是为 AI 赋予了学习和成长的能力。
这项技术将 AI 从“一次性工具”升级为“长期伙伴”,这正是企业数字化转型所需要的 AI 能力。
好了,这就是我今天想分享的内容。
本文转载自玄姐聊AGI 作者:玄姐