199 lines
20 KiB
JavaScript
199 lines
20 KiB
JavaScript
/**
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* Session Management for multi-turn conversations
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*/
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/**
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* Session Manager for multi-turn conversations
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*
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* @example
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* ```typescript
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* import { RuvLLM, SessionManager } from '@ruvector/ruvllm';
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*
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* const llm = new RuvLLM();
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* const sessions = new SessionManager(llm);
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*
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* // Create a new session
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* const session = sessions.create();
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*
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* // Chat with context
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* const response1 = sessions.chat(session.id, 'What is Python?');
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* const response2 = sessions.chat(session.id, 'How do I install it?');
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* // Second query automatically has context from first
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* ```
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*/
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export class SessionManager {
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constructor(llm) {
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this.sessions = new Map();
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this.llm = llm;
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}
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/**
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* Create a new conversation session
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*/
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create(metadata) {
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const id = `session-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
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const session = {
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id,
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createdAt: new Date(),
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messageCount: 0,
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messages: [],
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context: [],
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activeMemoryIds: [],
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metadata: metadata ?? {},
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};
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this.sessions.set(id, session);
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return session;
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}
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/**
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* Get session by ID
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*/
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get(sessionId) {
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return this.sessions.get(sessionId);
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}
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/**
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* Chat within a session (maintains context)
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*/
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chat(sessionId, message, config) {
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const session = this.sessions.get(sessionId);
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if (!session) {
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throw new Error(`Session not found: ${sessionId}`);
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}
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// Add user message
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session.messages.push({
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role: 'user',
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content: message,
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timestamp: new Date(),
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});
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// Build context from recent messages
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const contextWindow = this.buildContext(session);
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// Query with context
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const prompt = contextWindow ? `${contextWindow}\n\nUser: ${message}` : message;
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const response = this.llm.query(prompt, config);
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// Add assistant response
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session.messages.push({
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role: 'assistant',
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content: response.text,
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timestamp: new Date(),
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requestId: response.requestId,
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});
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session.messageCount = session.messages.length;
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return response;
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}
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/**
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* Add system message to session
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*/
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addSystemMessage(sessionId, content) {
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const session = this.sessions.get(sessionId);
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if (!session) {
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throw new Error(`Session not found: ${sessionId}`);
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}
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session.messages.push({
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role: 'system',
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content,
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timestamp: new Date(),
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});
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session.messageCount = session.messages.length;
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}
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/**
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* Add context to session (persisted to memory)
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*/
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addContext(sessionId, context) {
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const session = this.sessions.get(sessionId);
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if (!session) {
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throw new Error(`Session not found: ${sessionId}`);
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}
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session.context.push(context);
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// Also store in memory for retrieval
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const memoryId = this.llm.addMemory(context, {
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sessionId,
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type: 'context',
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timestamp: new Date().toISOString(),
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});
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session.activeMemoryIds.push(memoryId);
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return memoryId;
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}
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/**
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* Get conversation history
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*/
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getHistory(sessionId, limit) {
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const session = this.sessions.get(sessionId);
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if (!session) {
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return [];
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}
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const messages = session.messages;
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return limit ? messages.slice(-limit) : messages;
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}
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/**
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* Clear session history (keep session active)
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*/
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clearHistory(sessionId) {
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const session = this.sessions.get(sessionId);
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if (session) {
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session.messages = [];
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session.context = [];
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session.messageCount = 0;
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}
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}
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/**
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* End and delete session
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*/
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end(sessionId) {
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return this.sessions.delete(sessionId);
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}
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/**
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* List all active sessions
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*/
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list() {
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return Array.from(this.sessions.values());
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}
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/**
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* Export session as JSON
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*/
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export(sessionId) {
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const session = this.sessions.get(sessionId);
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if (!session) {
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return null;
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}
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return JSON.stringify(session, null, 2);
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}
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/**
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* Import session from JSON
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*/
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import(json) {
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const data = JSON.parse(json);
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const session = {
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...data,
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createdAt: new Date(data.createdAt),
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messages: data.messages.map((m) => ({
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...m,
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timestamp: new Date(m.timestamp),
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})),
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};
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this.sessions.set(session.id, session);
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return session;
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}
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/**
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* Build context string from recent messages
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*/
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buildContext(session, maxMessages = 10) {
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const recent = session.messages.slice(-maxMessages);
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if (recent.length === 0) {
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return '';
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}
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const contextParts = [];
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// Add persistent context
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if (session.context.length > 0) {
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contextParts.push('Context:\n' + session.context.join('\n'));
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}
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// Add conversation history
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const history = recent
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.map(m => {
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const role = m.role === 'user' ? 'User' : m.role === 'assistant' ? 'Assistant' : 'System';
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return `${role}: ${m.content}`;
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})
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.join('\n');
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if (history) {
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contextParts.push('Conversation:\n' + history);
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}
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return contextParts.join('\n\n');
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}
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}
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* Session Management for multi-turn conversations\n */\n\nimport {\n  ConversationSession,\n  ConversationMessage,\n  QueryResponse,\n  GenerationConfig,\n} from './types';\n\n/**\n * Session Manager for multi-turn conversations\n *\n * @example\n * ```typescript\n * import { RuvLLM, SessionManager } from '@ruvector/ruvllm';\n *\n * const llm = new RuvLLM();\n * const sessions = new SessionManager(llm);\n *\n * // Create a new session\n * const session = sessions.create();\n *\n * // Chat with context\n * const response1 = sessions.chat(session.id, 'What is Python?');\n * const response2 = sessions.chat(session.id, 'How do I install it?');\n * // Second query automatically has context from first\n * ```\n */\nexport class SessionManager {\n  private sessions: Map<string, ConversationSession> = new Map();\n  private llm: { query: (text: string, config?: GenerationConfig) => QueryResponse; addMemory: (content: string, metadata?: Record<string, unknown>) => number };\n\n  constructor(llm: { query: (text: string, config?: GenerationConfig) => QueryResponse; addMemory: (content: string, metadata?: Record<string, unknown>) => number }) {\n    this.llm = llm;\n  }\n\n  /**\n   * Create a new conversation session\n   */\n  create(metadata?: Record<string, unknown>): ConversationSession {\n    const id = `session-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;\n    const session: ConversationSession = {\n      id,\n      createdAt: new Date(),\n      messageCount: 0,\n      messages: [],\n      context: [],\n      activeMemoryIds: [],\n      metadata: metadata ?? {},\n    };\n    this.sessions.set(id, session);\n    return session;\n  }\n\n  /**\n   * Get session by ID\n   */\n  get(sessionId: string): ConversationSession | undefined {\n    return this.sessions.get(sessionId);\n  }\n\n  /**\n   * Chat within a session (maintains context)\n   */\n  chat(sessionId: string, message: string, config?: GenerationConfig): QueryResponse {\n    const session = this.sessions.get(sessionId);\n    if (!session) {\n      throw new Error(`Session not found: ${sessionId}`);\n    }\n\n    // Add user message\n    session.messages.push({\n      role: 'user',\n      content: message,\n      timestamp: new Date(),\n    });\n\n    // Build context from recent messages\n    const contextWindow = this.buildContext(session);\n\n    // Query with context\n    const prompt = contextWindow ? `${contextWindow}\\n\\nUser: ${message}` : message;\n    const response = this.llm.query(prompt, config);\n\n    // Add assistant response\n    session.messages.push({\n      role: 'assistant',\n      content: response.text,\n      timestamp: new Date(),\n      requestId: response.requestId,\n    });\n\n    session.messageCount = session.messages.length;\n\n    return response;\n  }\n\n  /**\n   * Add system message to session\n   */\n  addSystemMessage(sessionId: string, content: string): void {\n    const session = this.sessions.get(sessionId);\n    if (!session) {\n      throw new Error(`Session not found: ${sessionId}`);\n    }\n\n    session.messages.push({\n      role: 'system',\n      content,\n      timestamp: new Date(),\n    });\n    session.messageCount = session.messages.length;\n  }\n\n  /**\n   * Add context to session (persisted to memory)\n   */\n  addContext(sessionId: string, context: string): number {\n    const session = this.sessions.get(sessionId);\n    if (!session) {\n      throw new Error(`Session not found: ${sessionId}`);\n    }\n\n    session.context.push(context);\n\n    // Also store in memory for retrieval\n    const memoryId = this.llm.addMemory(context, {\n      sessionId,\n      type: 'context',\n      timestamp: new Date().toISOString(),\n    });\n\n    session.activeMemoryIds.push(memoryId);\n    return memoryId;\n  }\n\n  /**\n   * Get conversation history\n   */\n  getHistory(sessionId: string, limit?: number): ConversationMessage[] {\n    const session = this.sessions.get(sessionId);\n    if (!session) {\n      return [];\n    }\n\n    const messages = session.messages;\n    return limit ? messages.slice(-limit) : messages;\n  }\n\n  /**\n   * Clear session history (keep session active)\n   */\n  clearHistory(sessionId: string): void {\n    const session = this.sessions.get(sessionId);\n    if (session) {\n      session.messages = [];\n      session.context = [];\n      session.messageCount = 0;\n    }\n  }\n\n  /**\n   * End and delete session\n   */\n  end(sessionId: string): boolean {\n    return this.sessions.delete(sessionId);\n  }\n\n  /**\n   * List all active sessions\n   */\n  list(): ConversationSession[] {\n    return Array.from(this.sessions.values());\n  }\n\n  /**\n   * Export session as JSON\n   */\n  export(sessionId: string): string | null {\n    const session = this.sessions.get(sessionId);\n    if (!session) {\n      return null;\n    }\n\n    return JSON.stringify(session, null, 2);\n  }\n\n  /**\n   * Import session from JSON\n   */\n  import(json: string): ConversationSession {\n    const data = JSON.parse(json);\n    const session: ConversationSession = {\n      ...data,\n      createdAt: new Date(data.createdAt),\n      messages: data.messages.map((m: ConversationMessage) => ({\n        ...m,\n        timestamp: new Date(m.timestamp),\n      })),\n    };\n\n    this.sessions.set(session.id, session);\n    return session;\n  }\n\n  /**\n   * Build context string from recent messages\n   */\n  private buildContext(session: ConversationSession, maxMessages = 10): string {\n    const recent = session.messages.slice(-maxMessages);\n    if (recent.length === 0) {\n      return '';\n    }\n\n    const contextParts: string[] = [];\n\n    // Add persistent context\n    if (session.context.length > 0) {\n      contextParts.push('Context:\\n' + session.context.join('\\n'));\n    }\n\n    // Add conversation history\n    const history = recent\n      .map(m => {\n        const role = m.role === 'user' ? 'User' : m.role === 'assistant' ? 'Assistant' : 'System';\n        return `${role}: ${m.content}`;\n      })\n      .join('\\n');\n\n    if (history) {\n      contextParts.push('Conversation:\\n' + history);\n    }\n\n    return contextParts.join('\\n\\n');\n  }\n}\n"]}
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