chore: restore .claude commands, agents, helpers & skills (lost in 1df208d)

Restores the entire .claude/ infrastructure that was accidentally deleted in commit 1df208d ('feat(timeline): add pulse animation for in-flight drag mutations'). Recovered via git checkout 1df208d^. Restored: - .claude/commands/ (gitlooper, sparc/, github/, automation/, monitoring/, optimization/, hooks/, plan, implement, research, review, perf, visualaudit) - .claude/agents/ (core/, github/, sparc/, v3/, swarm/, templates/, ...) - .claude/helpers/ (41 scripts incl. hook-handler.cjs, statusline.cjs) - .claude/skills/ (20 skills incl. sparc-methodology, github-*, v3-*) - .claude/settings.json (hooks configuration) Also updated all CapaKraken → Nexus references in affected command files. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-08-15 11:43:52 +02:00
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+---
+name: "AgentDB Advanced Features"
+description: "Master advanced AgentDB features including QUIC synchronization, multi-database management, custom distance metrics, hybrid search, and distributed systems integration. Use when building distributed AI systems, multi-agent coordination, or advanced vector search applications."
+---
+
+# AgentDB Advanced Features
+
+## What This Skill Does
+
+Covers advanced AgentDB capabilities for distributed systems, multi-database coordination, custom distance metrics, hybrid search (vector + metadata), QUIC synchronization, and production deployment patterns. Enables building sophisticated AI systems with sub-millisecond cross-node communication and advanced search capabilities.
+
+**Performance**: <1ms QUIC sync, hybrid search with filters, custom distance metrics.
+
+## Prerequisites
+
+- Node.js 18+
+- AgentDB v1.0.7+ (via agentic-flow)
+- Understanding of distributed systems (for QUIC sync)
+- Vector search fundamentals
+
+---
+
+## QUIC Synchronization
+
+### What is QUIC Sync?
+
+QUIC (Quick UDP Internet Connections) enables sub-millisecond latency synchronization between AgentDB instances across network boundaries with automatic retry, multiplexing, and encryption.
+
+**Benefits**:
+
+- <1ms latency between nodes
+- Multiplexed streams (multiple operations simultaneously)
+- Built-in encryption (TLS 1.3)
+- Automatic retry and recovery
+- Event-based broadcasting
+
+### Enable QUIC Sync
+
+```typescript
+import { createAgentDBAdapter } from "agentic-flow/reasoningbank";
+
+// Initialize with QUIC synchronization
+const adapter = await createAgentDBAdapter({
+  dbPath: ".agentdb/distributed.db",
+  enableQUICSync: true,
+  syncPort: 4433,
+  syncPeers: ["192.168.1.10:4433", "192.168.1.11:4433", "192.168.1.12:4433"],
+});
+
+// Patterns automatically sync across all peers
+await adapter.insertPattern({
+  // ... pattern data
+});
+
+// Available on all peers within ~1ms
+```
+
+### QUIC Configuration
+
+```typescript
+const adapter = await createAgentDBAdapter({
+  enableQUICSync: true,
+  syncPort: 4433, // QUIC server port
+  syncPeers: ["host1:4433"], // Peer addresses
+  syncInterval: 1000, // Sync interval (ms)
+  syncBatchSize: 100, // Patterns per batch
+  maxRetries: 3, // Retry failed syncs
+  compression: true, // Enable compression
+});
+```
+
+### Multi-Node Deployment
+
+```bash
+# Node 1 (192.168.1.10)
+AGENTDB_QUIC_SYNC=true \
+AGENTDB_QUIC_PORT=4433 \
+AGENTDB_QUIC_PEERS=192.168.1.11:4433,192.168.1.12:4433 \
+node server.js
+
+# Node 2 (192.168.1.11)
+AGENTDB_QUIC_SYNC=true \
+AGENTDB_QUIC_PORT=4433 \
+AGENTDB_QUIC_PEERS=192.168.1.10:4433,192.168.1.12:4433 \
+node server.js
+
+# Node 3 (192.168.1.12)
+AGENTDB_QUIC_SYNC=true \
+AGENTDB_QUIC_PORT=4433 \
+AGENTDB_QUIC_PEERS=192.168.1.10:4433,192.168.1.11:4433 \
+node server.js
+```
+
+---
+
+## Distance Metrics
+
+### Cosine Similarity (Default)
+
+Best for normalized vectors, semantic similarity:
+
+```bash
+# CLI
+npx agentdb@latest query ./vectors.db "[0.1,0.2,...]" -m cosine
+
+# API
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  metric: 'cosine',
+  k: 10,
+});
+```
+
+**Use Cases**:
+
+- Text embeddings (BERT, GPT, etc.)
+- Semantic search
+- Document similarity
+- Most general-purpose applications
+
+**Formula**: `cos(θ) = (A · B) / (||A|| × ||B||)`
+**Range**: [-1, 1] (1 = identical, -1 = opposite)
+
+### Euclidean Distance (L2)
+
+Best for spatial data, geometric similarity:
+
+```bash
+# CLI
+npx agentdb@latest query ./vectors.db "[0.1,0.2,...]" -m euclidean
+
+# API
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  metric: 'euclidean',
+  k: 10,
+});
+```
+
+**Use Cases**:
+
+- Image embeddings
+- Spatial data
+- Computer vision
+- When vector magnitude matters
+
+**Formula**: `d = √(Σ(ai - bi)²)`
+**Range**: [0, ∞] (0 = identical, ∞ = very different)
+
+### Dot Product
+
+Best for pre-normalized vectors, fast computation:
+
+```bash
+# CLI
+npx agentdb@latest query ./vectors.db "[0.1,0.2,...]" -m dot
+
+# API
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  metric: 'dot',
+  k: 10,
+});
+```
+
+**Use Cases**:
+
+- Pre-normalized embeddings
+- Fast similarity computation
+- When vectors are already unit-length
+
+**Formula**: `dot = Σ(ai × bi)`
+**Range**: [-∞, ∞] (higher = more similar)
+
+### Custom Distance Metrics
+
+```typescript
+// Implement custom distance function
+function customDistance(vec1: number[], vec2: number[]): number {
+  // Weighted Euclidean distance
+  const weights = [1.0, 2.0, 1.5, ...];
+  let sum = 0;
+  for (let i = 0; i < vec1.length; i++) {
+    sum += weights[i] * Math.pow(vec1[i] - vec2[i], 2);
+  }
+  return Math.sqrt(sum);
+}
+
+// Use in search (requires custom implementation)
+```
+
+---
+
+## Hybrid Search (Vector + Metadata)
+
+### Basic Hybrid Search
+
+Combine vector similarity with metadata filtering:
+
+```typescript
+// Store documents with metadata
+await adapter.insertPattern({
+  id: "",
+  type: "document",
+  domain: "research-papers",
+  pattern_data: JSON.stringify({
+    embedding: documentEmbedding,
+    text: documentText,
+    metadata: {
+      author: "Jane Smith",
+      year: 2025,
+      category: "machine-learning",
+      citations: 150,
+    },
+  }),
+  confidence: 1.0,
+  usage_count: 0,
+  success_count: 0,
+  created_at: Date.now(),
+  last_used: Date.now(),
+});
+
+// Hybrid search: vector similarity + metadata filters
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  domain: "research-papers",
+  k: 20,
+  filters: {
+    year: { $gte: 2023 }, // Published 2023 or later
+    category: "machine-learning", // ML papers only
+    citations: { $gte: 50 }, // Highly cited
+  },
+});
+```
+
+### Advanced Filtering
+
+```typescript
+// Complex metadata queries
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  domain: "products",
+  k: 50,
+  filters: {
+    price: { $gte: 10, $lte: 100 }, // Price range
+    category: { $in: ["electronics", "gadgets"] }, // Multiple categories
+    rating: { $gte: 4.0 }, // High rated
+    inStock: true, // Available
+    tags: { $contains: "wireless" }, // Has tag
+  },
+});
+```
+
+### Weighted Hybrid Search
+
+Combine vector and metadata scores:
+
+```typescript
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  domain: "content",
+  k: 20,
+  hybridWeights: {
+    vectorSimilarity: 0.7, // 70% weight on semantic similarity
+    metadataScore: 0.3, // 30% weight on metadata match
+  },
+  filters: {
+    category: "technology",
+    recency: { $gte: Date.now() - 30 * 24 * 3600000 }, // Last 30 days
+  },
+});
+```
+
+---
+
+## Multi-Database Management
+
+### Multiple Databases
+
+```typescript
+// Separate databases for different domains
+const knowledgeDB = await createAgentDBAdapter({
+  dbPath: ".agentdb/knowledge.db",
+});
+
+const conversationDB = await createAgentDBAdapter({
+  dbPath: ".agentdb/conversations.db",
+});
+
+const codeDB = await createAgentDBAdapter({
+  dbPath: ".agentdb/code.db",
+});
+
+// Use appropriate database for each task
+await knowledgeDB.insertPattern({
+  /* knowledge */
+});
+await conversationDB.insertPattern({
+  /* conversation */
+});
+await codeDB.insertPattern({
+  /* code */
+});
+```
+
+### Database Sharding
+
+```typescript
+// Shard by domain for horizontal scaling
+const shards = {
+  "domain-a": await createAgentDBAdapter({ dbPath: ".agentdb/shard-a.db" }),
+  "domain-b": await createAgentDBAdapter({ dbPath: ".agentdb/shard-b.db" }),
+  "domain-c": await createAgentDBAdapter({ dbPath: ".agentdb/shard-c.db" }),
+};
+
+// Route queries to appropriate shard
+function getDBForDomain(domain: string) {
+  const shardKey = domain.split("-")[0]; // Extract shard key
+  return shards[shardKey] || shards["domain-a"];
+}
+
+// Insert to correct shard
+const db = getDBForDomain("domain-a-task");
+await db.insertPattern({
+  /* ... */
+});
+```
+
+---
+
+## MMR (Maximal Marginal Relevance)
+
+Retrieve diverse results to avoid redundancy:
+
+```typescript
+// Without MMR: Similar results may be redundant
+const standardResults = await adapter.retrieveWithReasoning(queryEmbedding, {
+  k: 10,
+  useMMR: false,
+});
+
+// With MMR: Diverse, non-redundant results
+const diverseResults = await adapter.retrieveWithReasoning(queryEmbedding, {
+  k: 10,
+  useMMR: true,
+  mmrLambda: 0.5, // Balance relevance (0) vs diversity (1)
+});
+```
+
+**MMR Parameters**:
+
+- `mmrLambda = 0`: Maximum relevance (may be redundant)
+- `mmrLambda = 0.5`: Balanced (default)
+- `mmrLambda = 1`: Maximum diversity (may be less relevant)
+
+**Use Cases**:
+
+- Search result diversification
+- Recommendation systems
+- Avoiding echo chambers
+- Exploratory search
+
+---
+
+## Context Synthesis
+
+Generate rich context from multiple memories:
+
+```typescript
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  domain: "problem-solving",
+  k: 10,
+  synthesizeContext: true, // Enable context synthesis
+});
+
+// ContextSynthesizer creates coherent narrative
+console.log("Synthesized Context:", result.context);
+// "Based on 10 similar problem-solving attempts, the most effective
+//  approach involves: 1) analyzing root cause, 2) brainstorming solutions,
+//  3) evaluating trade-offs, 4) implementing incrementally. Success rate: 85%"
+
+console.log("Patterns:", result.patterns);
+// Extracted common patterns across memories
+```
+
+---
+
+## Production Patterns
+
+### Connection Pooling
+
+```typescript
+// Singleton pattern for shared adapter
+class AgentDBPool {
+  private static instance: AgentDBAdapter;
+
+  static async getInstance() {
+    if (!this.instance) {
+      this.instance = await createAgentDBAdapter({
+        dbPath: ".agentdb/production.db",
+        quantizationType: "scalar",
+        cacheSize: 2000,
+      });
+    }
+    return this.instance;
+  }
+}
+
+// Use in application
+const db = await AgentDBPool.getInstance();
+const results = await db.retrieveWithReasoning(queryEmbedding, { k: 10 });
+```
+
+### Error Handling
+
+```typescript
+async function safeRetrieve(queryEmbedding: number[], options: any) {
+  try {
+    const result = await adapter.retrieveWithReasoning(queryEmbedding, options);
+    return result;
+  } catch (error) {
+    if (error.code === "DIMENSION_MISMATCH") {
+      console.error("Query embedding dimension mismatch");
+      // Handle dimension error
+    } else if (error.code === "DATABASE_LOCKED") {
+      // Retry with exponential backoff
+      await new Promise((resolve) => setTimeout(resolve, 100));
+      return safeRetrieve(queryEmbedding, options);
+    }
+    throw error;
+  }
+}
+```
+
+### Monitoring and Logging
+
+```typescript
+// Performance monitoring
+const startTime = Date.now();
+const result = await adapter.retrieveWithReasoning(queryEmbedding, { k: 10 });
+const latency = Date.now() - startTime;
+
+if (latency > 100) {
+  console.warn("Slow query detected:", latency, "ms");
+}
+
+// Log statistics
+const stats = await adapter.getStats();
+console.log("Database Stats:", {
+  totalPatterns: stats.totalPatterns,
+  dbSize: stats.dbSize,
+  cacheHitRate: stats.cacheHitRate,
+  avgSearchLatency: stats.avgSearchLatency,
+});
+```
+
+---
+
+## CLI Advanced Operations
+
+### Database Import/Export
+
+```bash
+# Export with compression
+npx agentdb@latest export ./vectors.db ./backup.json.gz --compress
+
+# Import from backup
+npx agentdb@latest import ./backup.json.gz --decompress
+
+# Merge databases
+npx agentdb@latest merge ./db1.sqlite ./db2.sqlite ./merged.sqlite
+```
+
+### Database Optimization
+
+```bash
+# Vacuum database (reclaim space)
+sqlite3 .agentdb/vectors.db "VACUUM;"
+
+# Analyze for query optimization
+sqlite3 .agentdb/vectors.db "ANALYZE;"
+
+# Rebuild indices
+npx agentdb@latest reindex ./vectors.db
+```
+
+---
+
+## Environment Variables
+
+```bash
+# AgentDB configuration
+AGENTDB_PATH=.agentdb/reasoningbank.db
+AGENTDB_ENABLED=true
+
+# Performance tuning
+AGENTDB_QUANTIZATION=binary     # binary|scalar|product|none
+AGENTDB_CACHE_SIZE=2000
+AGENTDB_HNSW_M=16
+AGENTDB_HNSW_EF=100
+
+# Learning plugins
+AGENTDB_LEARNING=true
+
+# Reasoning agents
+AGENTDB_REASONING=true
+
+# QUIC synchronization
+AGENTDB_QUIC_SYNC=true
+AGENTDB_QUIC_PORT=4433
+AGENTDB_QUIC_PEERS=host1:4433,host2:4433
+```
+
+---
+
+## Troubleshooting
+
+### Issue: QUIC sync not working
+
+```bash
+# Check firewall allows UDP port 4433
+sudo ufw allow 4433/udp
+
+# Verify peers are reachable
+ping host1
+
+# Check QUIC logs
+DEBUG=agentdb:quic node server.js
+```
+
+### Issue: Hybrid search returns no results
+
+```typescript
+// Relax filters
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  k: 100, // Increase k
+  filters: {
+    // Remove or relax filters
+  },
+});
+```
+
+### Issue: Memory consolidation too aggressive
+
+```typescript
+// Disable automatic optimization
+const result = await adapter.retrieveWithReasoning(queryEmbedding, {
+  optimizeMemory: false, // Disable auto-consolidation
+  k: 10,
+});
+```
+
+---
+
+## Learn More
+
+- **QUIC Protocol**: docs/quic-synchronization.pdf
+- **Hybrid Search**: docs/hybrid-search-guide.md
+- **GitHub**: https://github.com/ruvnet/agentic-flow/tree/main/packages/agentdb
+- **Website**: https://agentdb.ruv.io
+
+---
+
+**Category**: Advanced / Distributed Systems
+**Difficulty**: Advanced
+**Estimated Time**: 45-60 minutes