Incremental Updates

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interface ChangeDetector {
  detectChanges(
    currentVersion: string,
    targetVersion: string,
    capsuleId: string
  ): Promise<ChangeSet>;
}

interface ChangeSet {
  id: string;
  fromVersion: string;
  toVersion: string;
  changes: Change[];
  dependencies: VersionDependency[];
  metadata: ChangeMetadata;
}

interface Change {
  id: string;
  type: ChangeType;
  scope: ChangeScope;
  path: string;
  operation: 'create' | 'update' | 'delete' | 'move';
  oldValue?: any;
  newValue?: any;
  checksum: string;
  size: number;
  dependencies: string[];
  reversible: boolean;
}

enum ChangeType {
  CODE = 'code',
  CONFIGURATION = 'configuration',
  SCHEMA = 'schema',
  DATA = 'data',
  KNOWLEDGE = 'knowledge',
  EMBEDDING = 'embedding',
  PERMISSION = 'permission',
  DEPENDENCY = 'dependency'
}

enum ChangeScope {
  GLOBAL = 'global',           // Affects entire capsule
  MODULE = 'module',           // Affects specific module
  FUNCTION = 'function',       // Affects specific function
  CONFIGURATION = 'config',    // Configuration only
  DATA = 'data',               // Data structure only
  METADATA = 'metadata'        // Metadata only
}

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class IncrementalChangeDetector implements ChangeDetector {
  private contentHasher: ContentHasher;
  private semanticAnalyzer: SemanticAnalyzer;
  private dependencyTracker: DependencyTracker;
  
  async detectChanges(
    currentVersion: string,
    targetVersion: string,
    capsuleId: string
  ): Promise<ChangeSet> {
    
    // 1. Fetch version artifacts
    const currentArtifacts = await this.fetchVersionArtifacts(capsuleId, currentVersion);
    const targetArtifacts = await this.fetchVersionArtifacts(capsuleId, targetVersion);
    
    // 2. Perform multi-level comparison
    const changes: Change[] = [];
    
    // File-level changes
    const fileChanges = await this.detectFileChanges(currentArtifacts, targetArtifacts);
    changes.push(...fileChanges);
    
    // Semantic changes (function signatures, API contracts)
    const semanticChanges = await this.detectSemanticChanges(
      currentArtifacts, 
      targetArtifacts
    );
    changes.push(...semanticChanges);
    
    // Configuration changes
    const configChanges = await this.detectConfigurationChanges(
      currentArtifacts.config,
      targetArtifacts.config
    );
    changes.push(...configChanges);
    
    // Database schema changes
    const schemaChanges = await this.detectSchemaChanges(
      currentArtifacts.schema,
      targetArtifacts.schema
    );
    changes.push(...schemaChanges);
    
    // Knowledge asset changes
    const knowledgeChanges = await this.detectKnowledgeChanges(
      currentArtifacts.knowledge,
      targetArtifacts.knowledge
    );
    changes.push(...knowledgeChanges);
    
    // 3. Analyze change dependencies
    const dependencyAnalysis = await this.analyzeDependencies(changes);
    
    // 4. Optimize change order
    const optimizedChanges = await this.optimizeChangeOrder(changes, dependencyAnalysis);
    
    return {
      id: uuid(),
      fromVersion: currentVersion,
      toVersion: targetVersion,
      changes: optimizedChanges,
      dependencies: dependencyAnalysis.external,
      metadata: {
        totalSize: changes.reduce((sum, c) => sum + c.size, 0),
        estimatedTime: this.estimateUpdateTime(optimizedChanges),
        riskLevel: this.assessRiskLevel(optimizedChanges),
        rollbackComplexity: this.assessRollbackComplexity(optimizedChanges),
        breakingChanges: changes.filter(c => this.isBreakingChange(c)),
        compatibilityImpact: await this.assessCompatibilityImpact(changes)
      }
    };
  }
  
  private async detectSemanticChanges(
    currentArtifacts: CapsuleArtifacts,
    targetArtifacts: CapsuleArtifacts
  ): Promise<Change[]> {
    
    const changes: Change[] = [];
    
    // Analyze API contract changes
    const currentAPI = await this.extractAPIContract(currentArtifacts);
    const targetAPI = await this.extractAPIContract(targetArtifacts);
    
    const apiChanges = this.compareAPIContracts(currentAPI, targetAPI);
    
    for (const apiChange of apiChanges) {
      changes.push({
        id: uuid(),
        type: ChangeType.CODE,
        scope: ChangeScope.FUNCTION,
        path: apiChange.endpoint,
        operation: apiChange.operation,
        oldValue: apiChange.oldContract,
        newValue: apiChange.newContract,
        checksum: this.calculateChecksum(apiChange.newContract),
        size: this.calculateChangeSize(apiChange),
        dependencies: await this.findAPIDependencies(apiChange.endpoint),
        reversible: !this.isBreakingAPIChange(apiChange)
      });
    }
    
    return changes;
  }
  
  private async detectKnowledgeChanges(
    currentKnowledge: KnowledgeAssets,
    targetKnowledge: KnowledgeAssets
  ): Promise<Change[]> {
    
    const changes: Change[] = [];
    
    // Compare knowledge rules
    const ruleChanges = this.compareKnowledgeRules(
      currentKnowledge.rules,
      targetKnowledge.rules
    );
    
    changes.push(...ruleChanges);
    
    // Compare embeddings
    const embeddingChanges = await this.compareEmbeddings(
      currentKnowledge.embeddings,
      targetKnowledge.embeddings
    );
    
    changes.push(...embeddingChanges);
    
    // Compare schemas
    const schemaChanges = this.compareSchemas(
      currentKnowledge.schemas,
      targetKnowledge.schemas
    );
    
    changes.push(...schemaChanges);
    
    return changes;
  }
  
  private async compareEmbeddings(
    currentEmbeddings: EmbeddingAsset[],
    targetEmbeddings: EmbeddingAsset[]
  ): Promise<Change[]> {
    
    const changes: Change[] = [];
    
    for (const targetEmbedding of targetEmbeddings) {
      const currentEmbedding = currentEmbeddings.find(e => e.id === targetEmbedding.id);
      
      if (!currentEmbedding) {
        // New embedding
        changes.push({
          id: uuid(),
          type: ChangeType.EMBEDDING,
          scope: ChangeScope.MODULE,
          path: targetEmbedding.path,
          operation: 'create',
          newValue: targetEmbedding,
          checksum: targetEmbedding.checksum,
          size: targetEmbedding.vectorSize,
          dependencies: [],
          reversible: true
        });
      } else {
        // Compare embedding vectors for similarity
        const similarity = await this.calculateEmbeddingSimilarity(
          currentEmbedding.vector,
          targetEmbedding.vector
        );
        
        if (similarity < 0.95) { // Significant change threshold
          changes.push({
            id: uuid(),
            type: ChangeType.EMBEDDING,
            scope: ChangeScope.MODULE,
            path: targetEmbedding.path,
            operation: 'update',
            oldValue: currentEmbedding,
            newValue: targetEmbedding,
            checksum: targetEmbedding.checksum,
            size: targetEmbedding.vectorSize,
            dependencies: [],
            reversible: true
          });
        }
      }
    }
    
    // Detect removed embeddings
    for (const currentEmbedding of currentEmbeddings) {
      const targetExists = targetEmbeddings.some(e => e.id === currentEmbedding.id);
      
      if (!targetExists) {
        changes.push({
          id: uuid(),
          type: ChangeType.EMBEDDING,
          scope: ChangeScope.MODULE,
          path: currentEmbedding.path,
          operation: 'delete',
          oldValue: currentEmbedding,
          checksum: '',
          size: 0,
          dependencies: [],
          reversible: true
        });
      }
    }
    
    return changes;
  }
}

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interface ConflictResolver {
  detectConflicts(changeSet: ChangeSet, context: UpdateContext): Promise<ConflictReport>;
  resolveConflicts(conflicts: Conflict[], strategy: ResolutionStrategy): Promise<ResolutionResult>;
}

interface Conflict {
  id: string;
  type: ConflictType;
  severity: ConflictSeverity;
  changes: Change[];
  context: ConflictContext;
  autoResolvable: boolean;
  resolutionOptions: ResolutionOption[];
}

enum ConflictType {
  VERSION_MISMATCH = 'version_mismatch',
  DATA_CONFLICT = 'data_conflict',
  SCHEMA_CONFLICT = 'schema_conflict',
  DEPENDENCY_CONFLICT = 'dependency_conflict',
  CONFIGURATION_CONFLICT = 'configuration_conflict',
  KNOWLEDGE_CONFLICT = 'knowledge_conflict',
  PERMISSION_CONFLICT = 'permission_conflict'
}

enum ConflictSeverity {
  CRITICAL = 'critical',     // Cannot proceed without resolution
  WARNING = 'warning',       // Can proceed but may cause issues
  INFO = 'info'             // Informational only
}

class AdvancedConflictResolver implements ConflictResolver {
  async detectConflicts(
    changeSet: ChangeSet,
    context: UpdateContext
  ): Promise<ConflictReport> {
    
    const conflicts: Conflict[] = [];
    
    // 1. Dependency conflicts
    const dependencyConflicts = await this.detectDependencyConflicts(
      changeSet,
      context.currentInstallations
    );
    conflicts.push(...dependencyConflicts);
    
    // 2. Schema conflicts
    const schemaConflicts = await this.detectSchemaConflicts(
      changeSet.changes.filter(c => c.type === ChangeType.SCHEMA),
      context
    );
    conflicts.push(...schemaConflicts);
    
    // 3. Configuration conflicts
    const configConflicts = await this.detectConfigurationConflicts(
      changeSet.changes.filter(c => c.type === ChangeType.CONFIGURATION),
      context
    );
    conflicts.push(...configConflicts);
    
    // 4. Knowledge conflicts
    const knowledgeConflicts = await this.detectKnowledgeConflicts(
      changeSet.changes.filter(c => c.type === ChangeType.KNOWLEDGE),
      context
    );
    conflicts.push(...knowledgeConflicts);
    
    // 5. Resource conflicts
    const resourceConflicts = await this.detectResourceConflicts(changeSet, context);
    conflicts.push(...resourceConflicts);
    
    return {
      changeSetId: changeSet.id,
      totalConflicts: conflicts.length,
      criticalConflicts: conflicts.filter(c => c.severity === ConflictSeverity.CRITICAL).length,
      autoResolvable: conflicts.filter(c => c.autoResolvable).length,
      conflicts,
      recommendedStrategy: this.recommendResolutionStrategy(conflicts)
    };
  }
  
  async resolveConflicts(
    conflicts: Conflict[],
    strategy: ResolutionStrategy
  ): Promise<ResolutionResult> {
    
    const resolutions: ConflictResolution[] = [];
    const failures: ConflictResolutionFailure[] = [];
    
    // Sort conflicts by severity and dependencies
    const sortedConflicts = this.sortConflictsByPriority(conflicts);
    
    for (const conflict of sortedConflicts) {
      try {
        const resolution = await this.resolveIndividualConflict(conflict, strategy);
        resolutions.push(resolution);
        
        // Update strategy based on resolution outcome
        strategy = this.adaptStrategy(strategy, resolution);
        
      } catch (error) {
        failures.push({
          conflictId: conflict.id,
          error: error.message,
          canRetry: this.canRetryResolution(conflict, error),
          alternatives: this.findAlternativeResolutions(conflict)
        });
        
        // For critical conflicts, stop resolution process
        if (conflict.severity === ConflictSeverity.CRITICAL) {
          break;
        }
      }
    }
    
    return {
      success: failures.length === 0,
      resolvedConflicts: resolutions.length,
      failedConflicts: failures.length,
      resolutions,
      failures,
      modifiedChangeSet: this.applyResolutionsToChangeSet(resolutions)
    };
  }
  
  private async resolveIndividualConflict(
    conflict: Conflict,
    strategy: ResolutionStrategy
  ): Promise<ConflictResolution> {
    
    switch (conflict.type) {
      case ConflictType.SCHEMA_CONFLICT:
        return await this.resolveSchemaConflict(conflict, strategy);
      
      case ConflictType.DEPENDENCY_CONFLICT:
        return await this.resolveDependencyConflict(conflict, strategy);
      
      case ConflictType.KNOWLEDGE_CONFLICT:
        return await this.resolveKnowledgeConflict(conflict, strategy);
      
      case ConflictType.CONFIGURATION_CONFLICT:
        return await this.resolveConfigurationConflict(conflict, strategy);
      
      default:
        return await this.resolveGenericConflict(conflict, strategy);
    }
  }
  
  private async resolveKnowledgeConflict(
    conflict: Conflict,
    strategy: ResolutionStrategy
  ): Promise<ConflictResolution> {
    
    const knowledgeChanges = conflict.changes.filter(c => c.type === ChangeType.KNOWLEDGE);
    
    // Analyze conflicting knowledge rules
    const conflictAnalysis = await this.analyzeKnowledgeConflict(knowledgeChanges);
    
    let resolution: ConflictResolution;
    
    switch (strategy.knowledgeStrategy) {
      case 'merge':
        resolution = await this.mergeKnowledgeRules(conflictAnalysis);
        break;
        
      case 'override':
        resolution = await this.overrideKnowledgeRules(conflictAnalysis);
        break;
        
      case 'version':
        resolution = await this.versionKnowledgeRules(conflictAnalysis);
        break;
        
      case 'user_decision':
        resolution = await this.requestUserDecision(conflict);
        break;
        
      default:
        throw new Error(`Unknown knowledge resolution strategy: ${strategy.knowledgeStrategy}`);
    }
    
    return {
      conflictId: conflict.id,
      strategy: strategy.knowledgeStrategy,
      outcome: resolution.outcome,
      modifiedChanges: resolution.modifiedChanges,
      metadata: resolution.metadata
    };
  }
  
  private async mergeKnowledgeRules(
    analysis: KnowledgeConflictAnalysis
  ): Promise<ConflictResolution> {
    
    const mergedRules: KnowledgeRule[] = [];
    
    for (const ruleConflict of analysis.conflictingRules) {
      // Use semantic merging for compatible rules
      if (ruleConflict.compatibility === 'compatible') {
        const mergedRule = await this.semanticMerge(
          ruleConflict.currentRule,
          ruleConflict.newRule
        );
        mergedRules.push(mergedRule);
      } 
      // For incompatible rules, create versioned rules
      else {
        const versionedRules = this.createVersionedRules(
          ruleConflict.currentRule,
          ruleConflict.newRule
        );
        mergedRules.push(...versionedRules);
      }
    }
    
    return {
      outcome: 'merged',
      modifiedChanges: this.createChangesFromMergedRules(mergedRules),
      metadata: {
        mergeStrategy: 'semantic',
        rulesCreated: mergedRules.length,
        conflictsResolved: analysis.conflictingRules.length
      }
    };
  }
}

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class KnowledgeMerger {
  async mergeKnowledgeAssets(
    currentKnowledge: KnowledgeAsset,
    newKnowledge: KnowledgeAsset,
    context: MergeContext
  ): Promise<MergedKnowledgeAsset> {
    
    const merger = this.selectMerger(currentKnowledge.type);
    
    switch (currentKnowledge.type) {
      case 'rule_engine':
        return await this.mergeRuleEngines(
          currentKnowledge as RuleEngineAsset,
          newKnowledge as RuleEngineAsset,
          context
        );
        
      case 'ontology':
        return await this.mergeOntologies(
          currentKnowledge as OntologyAsset,
          newKnowledge as OntologyAsset,
          context
        );
        
      case 'taxonomy':
        return await this.mergeTaxonomies(
          currentKnowledge as TaxonomyAsset,
          newKnowledge as TaxonomyAsset,
          context
        );
        
      case 'workflow':
        return await this.mergeWorkflows(
          currentKnowledge as WorkflowAsset,
          newKnowledge as WorkflowAsset,
          context
        );
        
      default:
        throw new Error(`Unsupported knowledge asset type: ${currentKnowledge.type}`);
    }
  }
  
  private async mergeRuleEngines(
    current: RuleEngineAsset,
    incoming: RuleEngineAsset,
    context: MergeContext
  ): Promise<MergedKnowledgeAsset> {
    
    const mergedRules: Rule[] = [];
    const conflicts: RuleConflict[] = [];
    
    // Create rule map for efficient lookup
    const currentRuleMap = new Map(current.rules.map(r => [r.id, r]));
    const incomingRuleMap = new Map(incoming.rules.map(r => [r.id, r]));
    
    // Process incoming rules
    for (const incomingRule of incoming.rules) {
      const currentRule = currentRuleMap.get(incomingRule.id);
      
      if (!currentRule) {
        // New rule - add directly
        mergedRules.push(incomingRule);
      } else {
        // Existing rule - check for conflicts
        const conflictAnalysis = this.analyzeRuleConflict(currentRule, incomingRule);
        
        if (conflictAnalysis.hasConflict) {
          conflicts.push({
            ruleId: incomingRule.id,
            currentRule,
            incomingRule,
            conflictType: conflictAnalysis.conflictType,
            resolution: await this.resolveRuleConflict(
              currentRule,
              incomingRule,
              context.resolutionStrategy
            )
          });
          
          mergedRules.push(conflictAnalysis.resolution.mergedRule);
        } else {
          // No conflict - use incoming rule (it's newer)
          mergedRules.push(incomingRule);
        }
      }
    }
    
    // Add remaining current rules that weren't in incoming
    for (const currentRule of current.rules) {
      if (!incomingRuleMap.has(currentRule.id)) {
        mergedRules.push(currentRule);
      }
    }
    
    // Validate merged rule set
    const validation = await this.validateRuleSet(mergedRules, context);
    
    if (!validation.isValid) {
      throw new Error(`Merged rule set validation failed: ${validation.errors.join(', ')}`);
    }
    
    return {
      type: 'rule_engine',
      id: `merged_${current.id}_${incoming.id}`,
      version: this.generateMergedVersion(current.version, incoming.version),
      rules: mergedRules,
      metadata: {
        mergedFrom: [current.id, incoming.id],
        conflictsResolved: conflicts.length,
        rulesAdded: mergedRules.filter(r => !currentRuleMap.has(r.id)).length,
        rulesModified: conflicts.length,
        rulesRetained: mergedRules.filter(r => 
          currentRuleMap.has(r.id) && !conflicts.some(c => c.ruleId === r.id)
        ).length
      },
      conflicts
    };
  }
  
  private analyzeRuleConflict(current: Rule, incoming: Rule): RuleConflictAnalysis {
    const analysis: RuleConflictAnalysis = {
      hasConflict: false,
      conflictType: null,
      resolution: null
    };
    
    // Check condition conflicts
    if (!this.conditionsEqual(current.conditions, incoming.conditions)) {
      analysis.hasConflict = true;
      analysis.conflictType = 'condition_mismatch';
      
      // Attempt automatic resolution
      const conditionMerge = this.mergeConditions(current.conditions, incoming.conditions);
      
      if (conditionMerge.successful) {
        analysis.resolution = {
          strategy: 'merge_conditions',
          mergedRule: {
            ...incoming,
            conditions: conditionMerge.mergedConditions
          }
        };
      }
    }
    
    // Check action conflicts
    if (!this.actionsEqual(current.actions, incoming.actions)) {
      analysis.hasConflict = true;
      analysis.conflictType = analysis.conflictType || 'action_mismatch';
      
      const actionMerge = this.mergeActions(current.actions, incoming.actions);
      
      if (actionMerge.successful) {
        analysis.resolution = {
          strategy: 'merge_actions',
          mergedRule: {
            ...incoming,
            actions: actionMerge.mergedActions
          }
        };
      }
    }
    
    // Check priority conflicts
    if (current.priority !== incoming.priority) {
      analysis.hasConflict = true;
      analysis.conflictType = analysis.conflictType || 'priority_mismatch';
      
      // Use higher priority
      analysis.resolution = {
        strategy: 'use_higher_priority',
        mergedRule: {
          ...incoming,
          priority: Math.max(current.priority, incoming.priority)
        }
      };
    }
    
    return analysis;
  }
}

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class VersionCompatibilityChecker {
  async checkCompatibility(
    currentVersion: string,
    targetVersion: string,
    capsuleId: string,
    context: CompatibilityContext
  ): Promise<CompatibilityReport> {
    
    const report: CompatibilityReport = {
      compatible: true,
      compatibilityLevel: 'full',
      issues: [],
      requiredActions: [],
      riskAssessment: 'low',
      migrationPath: null
    };
    
    // 1. Semantic version compatibility
    const semverCheck = this.checkSemanticVersionCompatibility(currentVersion, targetVersion);
    report.compatible = report.compatible && semverCheck.compatible;
    if (!semverCheck.compatible) {
      report.issues.push(...semverCheck.issues);
    }
    
    // 2. API compatibility
    const apiCheck = await this.checkAPICompatibility(capsuleId, currentVersion, targetVersion);
    report.compatible = report.compatible && apiCheck.compatible;
    if (!apiCheck.compatible) {
      report.issues.push(...apiCheck.issues);
      report.compatibilityLevel = this.downgradeCompatibilityLevel(
        report.compatibilityLevel,
        'api_changes'
      );
    }
    
    // 3. Schema compatibility
    const schemaCheck = await this.checkSchemaCompatibility(
      capsuleId,
      currentVersion,
      targetVersion
    );
    report.compatible = report.compatible && schemaCheck.compatible;
    if (!schemaCheck.compatible) {
      report.issues.push(...schemaCheck.issues);
      report.requiredActions.push(...schemaCheck.requiredMigrations);
    }
    
    // 4. Dependency compatibility
    const dependencyCheck = await this.checkDependencyCompatibility(
      capsuleId,
      targetVersion,
      context.currentInstallations
    );
    report.compatible = report.compatible && dependencyCheck.compatible;
    if (!dependencyCheck.compatible) {
      report.issues.push(...dependencyCheck.issues);
      report.requiredActions.push(...dependencyCheck.requiredUpdates);
    }
    
    // 5. Configuration compatibility
    const configCheck = await this.checkConfigurationCompatibility(
      capsuleId,
      currentVersion,
      targetVersion
    );
    if (!configCheck.compatible) {
      report.issues.push(...configCheck.issues);
      report.requiredActions.push(...configCheck.requiredChanges);
    }
    
    // 6. Knowledge compatibility
    const knowledgeCheck = await this.checkKnowledgeCompatibility(
      capsuleId,
      currentVersion,
      targetVersion
    );
    if (!knowledgeCheck.compatible) {
      report.issues.push(...knowledgeCheck.issues);
      report.requiredActions.push(...knowledgeCheck.requiredMigrations);
    }
    
    // Calculate overall risk
    report.riskAssessment = this.calculateRiskLevel(report.issues, report.requiredActions);
    
    // Generate migration path if needed
    if (report.requiredActions.length > 0) {
      report.migrationPath = await this.generateMigrationPath(
        report.requiredActions,
        context
      );
    }
    
    return report;
  }
  
  private async checkAPICompatibility(
    capsuleId: string,
    currentVersion: string,
    targetVersion: string
  ): Promise<APICompatibilityCheck> {
    
    const currentAPI = await this.extractAPIDefinition(capsuleId, currentVersion);
    const targetAPI = await this.extractAPIDefinition(capsuleId, targetVersion);
    
    const check: APICompatibilityCheck = {
      compatible: true,
      issues: [],
      breakingChanges: [],
      deprecations: [],
      additions: []
    };
    
    // Check for removed endpoints
    for (const endpoint of currentAPI.endpoints) {
      const targetEndpoint = targetAPI.endpoints.find(e => e.path === endpoint.path);
      
      if (!targetEndpoint) {
        check.compatible = false;
        check.breakingChanges.push({
          type: 'endpoint_removed',
          endpoint: endpoint.path,
          impact: 'high',
          description: `Endpoint ${endpoint.path} has been removed`
        });
      } else {
        // Check for parameter changes
        const paramCheck = this.compareParameters(endpoint.parameters, targetEndpoint.parameters);
        
        if (paramCheck.breakingChanges.length > 0) {
          check.compatible = false;
          check.breakingChanges.push(...paramCheck.breakingChanges);
        }
        
        check.deprecations.push(...paramCheck.deprecations);
        
        // Check response format changes
        const responseCheck = this.compareResponseFormats(endpoint.responses, targetEndpoint.responses);
        
        if (responseCheck.breakingChanges.length > 0) {
          check.compatible = false;
          check.breakingChanges.push(...responseCheck.breakingChanges);
        }
      }
    }
    
    // Check for new endpoints
    for (const endpoint of targetAPI.endpoints) {
      const currentEndpoint = currentAPI.endpoints.find(e => e.path === endpoint.path);
      
      if (!currentEndpoint) {
        check.additions.push({
          type: 'endpoint_added',
          endpoint: endpoint.path,
          description: `New endpoint ${endpoint.path} added`
        });
      }
    }
    
    // Generate compatibility issues
    check.issues = [
      ...check.breakingChanges.map(bc => ({
        severity: 'error',
        message: bc.description,
        type: 'api_breaking_change'
      })),
      ...check.deprecations.map(d => ({
        severity: 'warning',
        message: d.description,
        type: 'api_deprecation'
      }))
    ];
    
    return check;
  }
}

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class KnowledgeABTester {
  async setupABTest(
    capsuleId: string,
    updateVersion: string,
    testConfiguration: ABTestConfig
  ): Promise<ABTestSetup> {
    
    const testId = uuid();
    
    // 1. Create parallel environments
    const controlEnvironment = await this.cloneCurrentEnvironment(capsuleId);
    const testEnvironment = await this.createTestEnvironment(capsuleId, updateVersion);
    
    // 2. Configure traffic routing
    const trafficRouter = await this.setupTrafficRouter({
      testId,
      controlEnvironment: controlEnvironment.id,
      testEnvironment: testEnvironment.id,
      trafficSplit: testConfiguration.trafficSplit,
      routingRules: testConfiguration.routingRules
    });
    
    // 3. Set up monitoring
    const monitors = await this.setupABTestMonitoring({
      testId,
      metrics: testConfiguration.metrics,
      successCriteria: testConfiguration.successCriteria,
      duration: testConfiguration.duration
    });
    
    // 4. Create test configuration
    const abTest: ABTest = {
      id: testId,
      capsuleId,
      updateVersion,
      status: 'running',
      configuration: testConfiguration,
      environments: {
        control: controlEnvironment,
        test: testEnvironment
      },
      trafficRouter,
      monitors,
      startedAt: new Date(),
      results: {
        metrics: new Map(),
        significance: null,
        recommendation: null
      }
    };
    
    // 5. Store test configuration
    await this.storeABTest(abTest);
    
    // 6. Start traffic routing
    await this.activateTrafficRouting(trafficRouter);
    
    return {
      testId,
      controlEnvironmentId: controlEnvironment.id,
      testEnvironmentId: testEnvironment.id,
      estimatedCompletionTime: new Date(
        Date.now() + testConfiguration.duration * 1000
      )
    };
  }
  
  async analyzeABTestResults(testId: string): Promise<ABTestAnalysis> {
    const test = await this.getABTest(testId);
    const metrics = await this.collectTestMetrics(testId);
    
    const analysis: ABTestAnalysis = {
      testId,
      duration: Date.now() - test.startedAt.getTime(),
      sampleSize: metrics.totalSamples,
      metrics: new Map(),
      statisticalSignificance: null,
      recommendation: 'continue_testing'
    };
    
    // Analyze each metric
    for (const [metricName, metricConfig] of test.configuration.metrics) {
      const controlData = metrics.control.get(metricName) || [];
      const testData = metrics.test.get(metricName) || [];
      
      const metricAnalysis = this.analyzeMetric(
        metricName,
        controlData,
        testData,
        metricConfig
      );
      
      analysis.metrics.set(metricName, metricAnalysis);
    }
    
    // Calculate overall statistical significance
    analysis.statisticalSignificance = this.calculateOverallSignificance(
      Array.from(analysis.metrics.values())
    );
    
    // Generate recommendation
    analysis.recommendation = this.generateRecommendation(
      analysis,
      test.configuration.successCriteria
    );
    
    // Check for early stopping conditions
    if (this.shouldStopEarly(analysis)) {
      analysis.earlyStopRecommended = true;
      analysis.earlyStopReason = this.getEarlyStopReason(analysis);
    }
    
    return analysis;
  }
  
  private analyzeMetric(
    metricName: string,
    controlData: number[],
    testData: number[],
    config: MetricConfig
  ): MetricAnalysis {
    
    const controlStats = this.calculateStatistics(controlData);
    const testStats = this.calculateStatistics(testData);
    
    // Perform appropriate statistical test
    let testResult: StatisticalTestResult;
    
    switch (config.testType) {
      case 't_test':
        testResult = this.performTTest(controlData, testData);
        break;
      case 'mann_whitney':
        testResult = this.performMannWhitneyTest(controlData, testData);
        break;
      case 'chi_square':
        testResult = this.performChiSquareTest(controlData, testData);
        break;
      default:
        testResult = this.performTTest(controlData, testData); // Default to t-test
    }
    
    // Calculate effect size
    const effectSize = this.calculateEffectSize(controlStats, testStats, config.type);
    
    // Determine practical significance
    const practicallySignificant = this.isPracticallySignificant(
      effectSize,
      config.minimumDetectableEffect
    );
    
    return {
      metricName,
      control: controlStats,
      test: testStats,
      improvement: (testStats.mean - controlStats.mean) / controlStats.mean,
      effectSize,
      statisticalSignificance: {
        pValue: testResult.pValue,
        significant: testResult.pValue < 0.05,
        confidenceInterval: testResult.confidenceInterval
      },
      practicalSignificance: {
        significant: practicallySignificant,
        minimumEffect: config.minimumDetectableEffect
      },
      sampleSize: {
        control: controlData.length,
        test: testData.length,
        adequate: this.isSampleSizeAdequate(controlData.length, testData.length, effectSize)
      }
    };
  }
  
  async concludeABTest(testId: string, decision: ABTestDecision): Promise<ABTestConclusion> {
    const test = await this.getABTest(testId);
    const finalAnalysis = await this.analyzeABTestResults(testId);
    
    let conclusion: ABTestConclusion;
    
    switch (decision) {
      case 'deploy_test_version':
        conclusion = await this.deployTestVersion(test, finalAnalysis);
        break;
        
      case 'keep_control_version':
        conclusion = await this.keepControlVersion(test, finalAnalysis);
        break;
        
      case 'extend_test':
        conclusion = await this.extendTest(test, finalAnalysis);
        break;
        
      case 'stop_test':
        conclusion = await this.stopTest(test, finalAnalysis);
        break;
    }
    
    // Update test status
    await this.updateABTestStatus(testId, 'concluded', conclusion);
    
    // Archive test environments if not extending
    if (decision !== 'extend_test') {
      await this.archiveTestEnvironments(test);
    }
    
    return conclusion;
  }
}