chore: recovery checkpoint - v3.0 API successfully recovered

CRITICAL CHECKPOINT - DO NOT PUSH TO GITHUB

Recovery Status:
- Successfully recovered brainy.ts from compiled JavaScript
- All core v3.0 API methods functional (add, get, update, delete, relate, find, etc.)
- Neural subsystem intact (562KB embedded patterns, NLP working)
- Augmentation pipeline operational (20+ augmentations)
- HNSW clustering system complete
- Triple Intelligence compiled (needs constructor fix)
- Test suite validates functionality

Changes preserved:
- 898 files with changes from last 3 days
- 144,475 insertions
- All augmentation improvements
- All test coverage enhancements
- Complete v3.0 feature set

This is a LOCAL checkpoint only - contains recovered work after corruption incident.
Created backup in .backups/brainy-full-20250910-151314.tar.gz

Branch: recovery-checkpoint-20250910-151433
Date: Wed Sep 10 03:18:04 PM PDT 2025

.recovery-workspace/dist-backup-20250910-141917/augmentations/metricsAugmentation.d.ts

@@ -0,0 +1,197 @@
+/**
+ * Metrics Augmentation - Optional Performance & Usage Metrics
+ *
+ * Replaces the hardcoded StatisticsCollector in Brainy with an optional augmentation.
+ * Tracks performance metrics, usage patterns, and system statistics.
+ *
+ * Zero-config: Automatically enabled for observability
+ * Can be disabled or customized via augmentation registry
+ */
+import { BaseAugmentation } from './brainyAugmentation.js';
+export interface MetricsConfig {
+    enabled?: boolean;
+    trackSearches?: boolean;
+    trackContentTypes?: boolean;
+    trackVerbTypes?: boolean;
+    trackStorageSizes?: boolean;
+    persistMetrics?: boolean;
+    metricsInterval?: number;
+}
+/**
+ * MetricsAugmentation - Makes metrics collection optional and pluggable
+ *
+ * Features:
+ * - Performance tracking (search latency, throughput)
+ * - Usage patterns (content types, verb types)
+ * - Storage metrics (sizes, counts)
+ * - Zero-config with smart defaults
+ */
+export declare class MetricsAugmentation extends BaseAugmentation {
+    readonly metadata: "readonly";
+    readonly name = "metrics";
+    readonly timing: "after";
+    operations: ("add" | "update" | "search" | "find" | "similar" | "delete" | "relate" | "unrelate" | "clear" | "all")[];
+    readonly priority = 40;
+    private statisticsCollector;
+    protected config: MetricsConfig;
+    private metricsTimer;
+    constructor(config?: MetricsConfig);
+    protected onInitialize(): Promise<void>;
+    protected onShutdown(): Promise<void>;
+    /**
+     * Execute augmentation - track metrics for operations
+     */
+    execute<T = any>(operation: string, params: any, next: () => Promise<T>): Promise<T>;
+    /**
+     * Handle add operation metrics
+     */
+    private handleAdd;
+    /**
+     * Handle search operation metrics
+     */
+    private handleSearch;
+    /**
+     * Handle delete operation metrics
+     */
+    private handleDelete;
+    /**
+     * Handle clear operation - reset metrics
+     */
+    private handleClear;
+    /**
+     * Start periodic metrics update timer
+     */
+    private startMetricsTimer;
+    /**
+     * Update storage size metrics
+     */
+    private updateStorageMetrics;
+    /**
+     * Persist metrics to storage
+     */
+    private persistMetrics;
+    /**
+     * Get current metrics
+     */
+    getStatistics(): {
+        enabled: boolean;
+        totalSearches: number;
+        totalUpdates: number;
+        contentTypes: {};
+        verbTypes: {};
+        searchPerformance: {
+            averageLatency: number;
+            p95Latency: number;
+            p99Latency: number;
+        };
+    } | {
+        nounCount?: Record<string, number> | undefined;
+        verbCount?: Record<string, number> | undefined;
+        metadataCount?: Record<string, number> | undefined;
+        hnswIndexSize?: number | undefined;
+        totalNodes?: number | undefined;
+        totalEdges?: number | undefined;
+        totalMetadata?: number | undefined;
+        operations?: {
+            add: number;
+            search: number;
+            delete: number;
+            update: number;
+            relate: number;
+            total: number;
+        } | undefined;
+        fieldNames?: Record<string, string[]> | undefined;
+        standardFieldMappings?: Record<string, Record<string, string[]>> | undefined;
+        contentTypes?: Record<string, number> | undefined;
+        dataFreshness?: {
+            oldestEntry: string;
+            newestEntry: string;
+            updatesLastHour: number;
+            updatesLastDay: number;
+            ageDistribution: {
+                last24h: number;
+                last7d: number;
+                last30d: number;
+                older: number;
+            };
+        } | undefined;
+        storageMetrics?: {
+            totalSizeBytes: number;
+            nounsSizeBytes: number;
+            verbsSizeBytes: number;
+            metadataSizeBytes: number;
+            indexSizeBytes: number;
+        } | undefined;
+        searchMetrics?: {
+            totalSearches: number;
+            averageSearchTimeMs: number;
+            searchesLastHour: number;
+            searchesLastDay: number;
+            topSearchTerms?: string[];
+        } | undefined;
+        verbStatistics?: {
+            totalVerbs: number;
+            verbTypes: Record<string, number>;
+            averageConnectionsPerVerb: number;
+        } | undefined;
+        serviceActivity?: Record<string, {
+            firstActivity: string;
+            lastActivity: string;
+            totalOperations: number;
+        }> | undefined;
+        services?: import("../coreTypes.js").ServiceStatistics[] | undefined;
+        throttlingMetrics?: {
+            storage?: {
+                currentlyThrottled: boolean;
+                lastThrottleTime?: string;
+                consecutiveThrottleEvents: number;
+                currentBackoffMs: number;
+                totalThrottleEvents: number;
+                throttleEventsByHour?: number[];
+                throttleReasons?: Record<string, number>;
+            };
+            operationImpact?: {
+                delayedOperations: number;
+                retriedOperations: number;
+                failedDueToThrottling: number;
+                averageDelayMs: number;
+                totalDelayMs: number;
+            };
+            serviceThrottling?: Record<string, {
+                throttleCount: number;
+                lastThrottle: string;
+                status: "normal" | "throttled" | "recovering";
+            }>;
+        } | undefined;
+        lastUpdated?: string | undefined;
+        distributedConfig?: import("../types/distributedTypes.js").SharedConfig | undefined;
+        enabled: boolean;
+        totalSearches?: undefined;
+        totalUpdates?: undefined;
+        verbTypes?: undefined;
+        searchPerformance?: undefined;
+    };
+    /**
+     * Record cache hit (called by cache augmentation)
+     * Note: Cache metrics are tracked internally by StatisticsCollector
+     */
+    recordCacheHit(): void;
+    /**
+     * Record cache miss (called by cache augmentation)
+     * Note: Cache metrics are tracked internally by StatisticsCollector
+     */
+    recordCacheMiss(): void;
+    /**
+     * Track custom metric
+     * Note: Custom metrics would need to be implemented in StatisticsCollector
+     */
+    trackCustomMetric(name: string, value: number): void;
+    /**
+     * Reset all metrics
+     */
+    reset(): void;
+}
+/**
+ * Factory function for zero-config metrics augmentation
+ */
+export declare function createMetricsAugmentation(config?: MetricsConfig): MetricsAugmentation;