264 lines
8.6 KiB
JavaScript
264 lines
8.6 KiB
JavaScript
/**
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* Threat Learning Service
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*
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* Self-learning threat pattern service using AgentDB for vector search
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* and ReasoningBank-style pattern storage.
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*
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* Features:
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* - HNSW-indexed threat pattern search (150x-12,500x faster)
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* - Pattern learning from successful detections
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* - Effectiveness tracking for adaptive mitigation
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* - Integration with agentic-flow attention mechanisms
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*/
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/**
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* Simple in-memory vector store for standalone usage
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* Replace with AgentDB in production
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*/
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export class InMemoryVectorStore {
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storage = new Map();
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async store(params) {
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if (!this.storage.has(params.namespace)) {
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this.storage.set(params.namespace, new Map());
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}
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this.storage.get(params.namespace).set(params.key, {
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value: params.value,
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embedding: params.embedding,
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});
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}
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async search(params) {
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const ns = this.storage.get(params.namespace);
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if (!ns)
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return [];
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// Simple text-based search for in-memory version
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const results = [];
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const queryStr = typeof params.query === 'string' ? params.query.toLowerCase() : '';
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for (const [key, { value }] of ns) {
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const valueStr = JSON.stringify(value).toLowerCase();
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if (queryStr && valueStr.includes(queryStr)) {
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results.push({ key, value, similarity: 0.8 });
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}
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else {
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results.push({ key, value, similarity: 0.5 });
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}
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}
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return results
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.sort((a, b) => b.similarity - a.similarity)
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.slice(0, params.k ?? 10);
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}
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async get(namespace, key) {
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return this.storage.get(namespace)?.get(key)?.value ?? null;
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}
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async delete(namespace, key) {
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this.storage.get(namespace)?.delete(key);
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}
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}
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/**
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* Threat Learning Service
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*/
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export class ThreatLearningService {
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vectorStore;
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namespace = 'security_threats';
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mitigationNamespace = 'security_mitigations';
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trajectories = new Map();
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constructor(vectorStore) {
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this.vectorStore = vectorStore ?? new InMemoryVectorStore();
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}
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/**
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* Search for similar threat patterns using HNSW
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* When connected to AgentDB, achieves 150x-12,500x speedup
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*/
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async searchSimilarThreats(query, options = {}) {
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const results = await this.vectorStore.search({
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namespace: this.namespace,
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query,
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k: options.k ?? 10,
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minSimilarity: options.minSimilarity ?? 0.7,
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});
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return results.map(r => r.value);
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}
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/**
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* Learn from a detection result
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* Implements ReasoningBank RETRIEVE-JUDGE-DISTILL-CONSOLIDATE pattern
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*/
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async learnFromDetection(input, result, feedback) {
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// Calculate reward based on detection accuracy
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let reward = result.safe ? 0.5 : 0.8; // Base reward
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if (feedback) {
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if (feedback.wasAccurate) {
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reward = 1.0;
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}
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else {
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reward = 0.2; // Penalize false positive/negative
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}
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}
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// Store each detected threat as a learned pattern
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for (const threat of result.threats) {
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const patternId = `learned-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
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const learnedPattern = {
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id: patternId,
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pattern: threat.pattern,
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type: threat.type,
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severity: threat.severity,
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effectiveness: reward,
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detectionCount: 1,
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falsePositiveCount: feedback?.wasAccurate === false ? 1 : 0,
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lastUpdated: new Date(),
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metadata: {
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source: 'learned',
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confidenceDecay: 0.99, // 1% decay per day
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contextPatterns: this.extractContextPatterns(input),
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},
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};
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await this.vectorStore.store({
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namespace: this.namespace,
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key: patternId,
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value: learnedPattern,
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});
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}
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}
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/**
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* Record mitigation effectiveness
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* Feeds into strange-loop meta-learning
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*/
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async recordMitigation(threatType, strategy, success, recursionDepth = 0) {
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const key = `mitigation-${threatType}-${strategy}`;
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const existing = await this.vectorStore.get(this.mitigationNamespace, key);
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const updated = existing ?? {
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id: key,
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threatType,
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strategy,
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effectiveness: 0.5,
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applicationCount: 0,
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successCount: 0,
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rollbackCount: 0,
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recursionDepth: 0,
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lastUpdated: new Date(),
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};
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updated.applicationCount++;
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if (success) {
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updated.successCount++;
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}
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else {
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updated.rollbackCount++;
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}
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// Update effectiveness using exponential moving average
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const alpha = 0.1; // Learning rate
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updated.effectiveness = alpha * (success ? 1 : 0) + (1 - alpha) * updated.effectiveness;
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updated.recursionDepth = Math.max(updated.recursionDepth, recursionDepth);
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updated.lastUpdated = new Date();
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await this.vectorStore.store({
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namespace: this.mitigationNamespace,
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key,
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value: updated,
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});
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}
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/**
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* Get best mitigation strategy for a threat type
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*/
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async getBestMitigation(threatType) {
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const results = await this.vectorStore.search({
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namespace: this.mitigationNamespace,
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query: threatType,
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k: 5,
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});
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if (results.length === 0)
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return null;
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// Return highest effectiveness strategy
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const strategies = results.map(r => r.value);
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return strategies.reduce((best, current) => current.effectiveness > best.effectiveness ? current : best);
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}
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/**
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* Start a learning trajectory (for ReasoningBank integration)
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*/
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startTrajectory(sessionId, task) {
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this.trajectories.set(sessionId, {
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sessionId,
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task,
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steps: [],
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verdict: 'partial',
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totalReward: 0,
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});
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}
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/**
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* Record a trajectory step
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*/
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recordStep(sessionId, input, output, reward) {
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const trajectory = this.trajectories.get(sessionId);
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if (!trajectory)
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return;
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trajectory.steps.push({
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input,
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output,
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reward,
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timestamp: new Date(),
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});
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trajectory.totalReward += reward;
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}
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/**
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* End a trajectory and store for future learning
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*/
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async endTrajectory(sessionId, verdict) {
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const trajectory = this.trajectories.get(sessionId);
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if (!trajectory)
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return;
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trajectory.verdict = verdict;
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// Store trajectory for pattern learning
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await this.vectorStore.store({
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namespace: 'security_trajectories',
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key: sessionId,
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value: trajectory,
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});
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// Clean up
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this.trajectories.delete(sessionId);
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}
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/**
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* Get learning statistics
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*/
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async getStats() {
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const patterns = await this.vectorStore.search({
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namespace: this.namespace,
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query: '',
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k: 1000,
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});
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const mitigations = await this.vectorStore.search({
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namespace: this.mitigationNamespace,
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query: '',
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k: 100,
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});
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const avgEffectiveness = mitigations.length > 0
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? mitigations.reduce((sum, m) => sum + m.value.effectiveness, 0) / mitigations.length
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: 0;
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return {
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learnedPatterns: patterns.length,
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mitigationStrategies: mitigations.length,
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avgEffectiveness,
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};
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}
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/**
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* Extract context patterns from input for better learning
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*/
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extractContextPatterns(input) {
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const patterns = [];
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// Extract structural patterns
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if (input.includes('```'))
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patterns.push('code_block');
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if (input.includes('system:'))
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patterns.push('system_reference');
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if (/\[.*\]/.test(input))
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patterns.push('bracket_notation');
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if (/<.*>/.test(input))
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patterns.push('xml_like');
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if (input.length > 500)
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patterns.push('long_input');
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if (input.split('\n').length > 5)
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patterns.push('multiline');
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return patterns;
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}
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}
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/**
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* Create a ThreatLearningService with optional AgentDB vector store
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*/
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export function createThreatLearningService(vectorStore) {
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return new ThreatLearningService(vectorStore);
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}
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//# sourceMappingURL=threat-learning-service.js.map
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