feat: add centralized agent configuration

- Create src/constants/agent-config.ts
- Consolidate TTL, MAX_MESSAGES, AI settings
- Add type-safe getSessionConfig() helper

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/constants/agent-config.ts

@@ -0,0 +1,79 @@
+/**
+ * Centralized configuration for all AI agents
+ *
+ * Benefits:
+ * - Single source of truth for agent settings
+ * - Easy to adjust settings without hunting through multiple files
+ * - Type-safe configuration
+ *
+ * Usage:
+ *   import { SESSION_TTL, AI_CONFIG, getSessionConfig } from './agent-config';
+ *   const config = getSessionConfig('server');
+ */
+
+// Session TTL values (in milliseconds)
+export const SESSION_TTL = {
+  server: 60 * 60 * 1000,      // 1 hour
+  troubleshoot: 60 * 60 * 1000, // 1 hour
+  domain: 60 * 60 * 1000,      // 1 hour
+  deposit: 30 * 60 * 1000,     // 30 minutes
+} as const;
+
+// Maximum messages to keep in session history
+export const MAX_SESSION_MESSAGES = {
+  server: 20,
+  troubleshoot: 20,
+  domain: 20,
+  deposit: 10,
+} as const;
+
+// OpenAI API configuration
+export const AI_CONFIG = {
+  model: 'gpt-4o-mini',
+  maxToolCalls: 3,
+  defaultTemperature: 0.7,
+  // Agent-specific token limits
+  maxTokens: {
+    server: 800,
+    serverReview: 500,
+    troubleshoot: 1500,
+    domain: 800,
+    deposit: 500,
+  },
+  temperature: {
+    server: 0.7,
+    serverReview: 0.5,
+    troubleshoot: 0.5,
+    domain: 0.7,
+    deposit: 0.7,
+  },
+} as const;
+
+// D1 table names for agent sessions
+export const SESSION_TABLES = {
+  server: 'server_sessions',
+  troubleshoot: 'troubleshoot_sessions',
+  domain: 'domain_sessions',
+  deposit: 'deposit_sessions',
+} as const;
+
+// Agent type definitions for type safety
+export type AgentType = keyof typeof SESSION_TTL;
+
+/**
+ * Helper to get session manager config for an agent
+ *
+ * @param agent - Agent type (server, troubleshoot, domain, deposit)
+ * @returns Configuration object with tableName, ttlMs, maxMessages
+ *
+ * @example
+ * const config = getSessionConfig('server');
+ * // Returns: { tableName: 'server_sessions', ttlMs: 3600000, maxMessages: 20 }
+ */
+export function getSessionConfig(agent: AgentType) {
+  return {
+    tableName: SESSION_TABLES[agent],
+    ttlMs: SESSION_TTL[agent],
+    maxMessages: MAX_SESSION_MESSAGES[agent],
+  };
+}

src/constants/index.ts

@@ -219,3 +219,8 @@ export type NotificationType = typeof NOTIFICATION_TYPE[keyof typeof NOTIFICATIO
 export type TroubleshootStatus = typeof TROUBLESHOOT_STATUS[keyof typeof TROUBLESHOOT_STATUS];
 export type ServerConsultationStatus = typeof SERVER_CONSULTATION_STATUS[keyof typeof SERVER_CONSULTATION_STATUS];
 export type LanguageCode = typeof LANGUAGE_CODE[keyof typeof LANGUAGE_CODE];
+
+/**
+ * Re-export agent configuration
+ */
+export * from './agent-config';