Exa Websets MCP Server

/** * Feature Flags Configuration * * This module manages feature flags for progressive MCP compliance. * Features are disabled by default to ensure backward compatibility. */ /** * Feature flags interface */ export interface FeatureFlags { /** * Enable resource support (MCP resources capability) */ resources: boolean; /** * Enable enhanced error format (MCP-compliant error responses) */ enhancedErrors: boolean; /** * Enable progress notifications for long-running operations */ progressNotifications: boolean; /** * Enable advanced logging capabilities */ logging: boolean; /** * Enable sampling/completion features */ sampling: boolean; } /** * Default feature flags (all disabled for backward compatibility) */ const DEFAULT_FLAGS: FeatureFlags = { resources: false, enhancedErrors: false, progressNotifications: false, logging: false, sampling: false }; /** * Load feature flags from environment variables */ function loadFeatureFlags(): FeatureFlags { return { resources: process.env.MCP_FEATURE_RESOURCES === 'true', enhancedErrors: process.env.MCP_FEATURE_ENHANCED_ERRORS === 'true', progressNotifications: process.env.MCP_FEATURE_PROGRESS_NOTIFICATIONS === 'true', logging: process.env.MCP_FEATURE_LOGGING === 'true', sampling: process.env.MCP_FEATURE_SAMPLING === 'true' }; } /** * Feature flag manager class */ export class FeatureFlagManager { private flags: FeatureFlags; constructor() { this.flags = loadFeatureFlags(); } /** * Get all feature flags */ getFlags(): FeatureFlags { return { ...this.flags }; } /** * Check if a specific feature is enabled */ isEnabled(feature: keyof FeatureFlags): boolean { return this.flags[feature]; } /** * Enable a feature (for testing purposes) */ enable(feature: keyof FeatureFlags): void { this.flags[feature] = true; } /** * Disable a feature (for testing purposes) */ disable(feature: keyof FeatureFlags): void { this.flags[feature] = false; } /** * Reset all flags to defaults */ reset(): void { this.flags = { ...DEFAULT_FLAGS }; } /** * Get a summary of enabled features */ getEnabledFeatures(): string[] { return Object.entries(this.flags) .filter(([_, enabled]) => enabled) .map(([feature]) => feature); } } // Global feature flag manager instance export const featureFlags = new FeatureFlagManager(); /** * Helper function to check if we should use new error format */ export function shouldUseEnhancedErrors(): boolean { return featureFlags.isEnabled('enhancedErrors'); } /** * Helper function to check if resources are enabled */ export function shouldEnableResources(): boolean { return featureFlags.isEnabled('resources'); } /** * Helper function to check if progress notifications are enabled */ export function shouldEnableProgressNotifications(): boolean { return featureFlags.isEnabled('progressNotifications'); }