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interface DependencyRelationship {
  id: string;
  sourceId: string;        // Capsule that depends
  targetId: string;        // Capsule being depended upon
  type: DependencyType;    // Nature of dependency
  strength: DependencyStrength;  // How critical is this dependency
  bidirectional: boolean;  // Is this a mutual dependency
  metadata: DependencyMetadata;
}

enum DependencyType {
  DIRECT = 'direct',           // Explicit dependency in manifest
  TRANSITIVE = 'transitive',   // Indirect dependency through chain
  DATA = 'data',               // Shared data structures
  RUNTIME = 'runtime',         // Runtime service calls
  KNOWLEDGE = 'knowledge',     // Shared knowledge assets
  CONFIGURATION = 'configuration' // Shared configuration
}

enum DependencyStrength {
  CRITICAL = 'critical',       // Cannot function without
  IMPORTANT = 'important',     // Degraded functionality without
  OPTIONAL = 'optional',       // Nice to have
  DEVELOPMENTAL = 'developmental' // Only needed for development
}

interface DependencyMetadata {
  createdAt: Date;
  usageFrequency: number;      // How often is this dependency used
  lastAccessed: Date;
  accessPattern: string[];     // Which functions/features use it
  alternativeOptions: string[]; // Alternative capsules that could replace
  migrationComplexity: 'low' | 'medium' | 'high';
}

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class DependencyTracker {
  private dependencyGraph: Map<string, Set<DependencyRelationship>>;
  private accessLogger: AccessLogger;
  private runtimeAnalyzer: RuntimeAnalyzer;
  
  async discoverRuntimeDependencies(capsuleId: string): Promise<DependencyRelationship[]> {
    // Monitor API calls and service interactions
    const apiCalls = await this.accessLogger.getApiCalls(capsuleId, {
      timeframe: '30d',
      includeInternal: true
    });
    
    // Analyze data access patterns
    const dataAccess = await this.runtimeAnalyzer.analyzeDataAccess(capsuleId);
    
    // Track knowledge base queries
    const knowledgeQueries = await this.runtimeAnalyzer.analyzeKnowledgeQueries(capsuleId);
    
    const dependencies: DependencyRelationship[] = [];
    
    // Process API call dependencies
    for (const call of apiCalls) {
      if (this.isInternalCapsuleCall(call.endpoint)) {
        const targetCapsule = this.extractCapsuleFromEndpoint(call.endpoint);
        
        dependencies.push({
          id: uuid(),
          sourceId: capsuleId,
          targetId: targetCapsule,
          type: DependencyType.RUNTIME,
          strength: this.calculateDependencyStrength(call.frequency, call.criticality),
          bidirectional: await this.checkBidirectional(capsuleId, targetCapsule),
          metadata: {
            createdAt: new Date(),
            usageFrequency: call.frequency,
            lastAccessed: call.lastAccessed,
            accessPattern: call.patterns,
            alternativeOptions: await this.findAlternatives(targetCapsule),
            migrationComplexity: 'medium'
          }
        });
      }
    }
    
    // Process data dependencies
    for (const access of dataAccess) {
      if (access.sharedWithCapsules.length > 0) {
        for (const sharedCapsule of access.sharedWithCapsules) {
          dependencies.push({
            id: uuid(),
            sourceId: capsuleId,
            targetId: sharedCapsule,
            type: DependencyType.DATA,
            strength: DependencyStrength.IMPORTANT,
            bidirectional: true,
            metadata: {
              createdAt: new Date(),
              usageFrequency: access.frequency,
              lastAccessed: access.lastAccessed,
              accessPattern: [access.operation],
              alternativeOptions: [],
              migrationComplexity: 'high'
            }
          });
        }
      }
    }
    
    return dependencies;
  }
  
  async buildRemovalImpactGraph(capsuleId: string): Promise<RemovalImpactGraph> {
    const directDependents = await this.getDirectDependents(capsuleId);
    const transitiveImpact = await this.calculateTransitiveImpact(capsuleId);
    const dataImpact = await this.calculateDataImpact(capsuleId);
    
    return {
      targetCapsule: capsuleId,
      directlyAffected: directDependents,
      transitivelyAffected: transitiveImpact,
      dataAffected: dataImpact,
      riskScore: this.calculateRemovalRisk(directDependents, transitiveImpact, dataImpact),
      estimatedDowntime: this.estimateDowntime(directDependents),
      migrationOptions: await this.findMigrationOptions(capsuleId)
    };
  }
}

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class ReferenceTracker {
  async scanForReferences(capsuleId: string): Promise<ReferenceMap> {
    const references: ReferenceMap = {
      codeReferences: [],
      configReferences: [],
      dataReferences: [],
      knowledgeReferences: [],
      apiReferences: []
    };
    
    // Scan code references
    references.codeReferences = await this.scanCodeReferences(capsuleId);
    
    // Scan configuration files
    references.configReferences = await this.scanConfigReferences(capsuleId);
    
    // Scan database references
    references.dataReferences = await this.scanDataReferences(capsuleId);
    
    // Scan knowledge base references
    references.knowledgeReferences = await this.scanKnowledgeReferences(capsuleId);
    
    // Scan API endpoint references
    references.apiReferences = await this.scanApiReferences(capsuleId);
    
    return references;
  }
  
  private async scanCodeReferences(capsuleId: string): Promise<CodeReference[]> {
    const allCapsules = await this.getAllActiveCapsules();
    const references: CodeReference[] = [];
    
    for (const capsule of allCapsules) {
      if (capsule.id === capsuleId) continue;
      
      const sourceFiles = await this.getCapsuleSourceFiles(capsule.id);
      
      for (const file of sourceFiles) {
        const content = await this.readFile(file.path);
        
        // Search for various reference patterns
        const patterns = [
          new RegExp(`import.*from.*['"\`]${capsuleId}['"\`]`, 'g'),
          new RegExp(`require\\(['"\`]${capsuleId}['"\`]\\)`, 'g'),
          new RegExp(`aimatrix\\.capsules\\['"\`]${capsuleId}['"\`]`, 'g'),
          new RegExp(`getCapsule\\(['"\`]${capsuleId}['"\`]\\)`, 'g')
        ];
        
        for (const pattern of patterns) {
          const matches = content.match(pattern);
          if (matches) {
            references.push({
              referencingCapsule: capsule.id,
              filePath: file.path,
              lineNumbers: this.findLineNumbers(content, pattern),
              context: this.extractContext(content, pattern),
              referenceType: this.classifyReference(pattern),
              severity: this.assessReferenceSeverity(pattern, content)
            });
          }
        }
      }
    }
    
    return references;
  }
  
  private async scanDataReferences(capsuleId: string): Promise<DataReference[]> {
    const references: DataReference[] = [];
    
    // Check database foreign key references
    const fkReferences = await this.supabase
      .from('information_schema.table_constraints')
      .select('*')
      .eq('constraint_type', 'FOREIGN KEY')
      .contains('constraint_name', capsuleId);
    
    for (const fk of fkReferences.data || []) {
      references.push({
        type: 'foreign_key',
        table: fk.table_name,
        column: fk.column_name,
        referencedTable: fk.referenced_table_name,
        referencedColumn: fk.referenced_column_name,
        constraintName: fk.constraint_name,
        severity: 'critical'
      });
    }
    
    // Check vector embedding references
    const vectorReferences = await this.supabase
      .from('capsule_knowledge_assets')
      .select('*')
      .textSearch('metadata', capsuleId);
    
    for (const vector of vectorReferences.data || []) {
      references.push({
        type: 'vector_embedding',
        assetId: vector.id,
        capsuleId: vector.capsule_id,
        embeddingPath: vector.asset_path,
        severity: 'important'
      });
    }
    
    return references;
  }
}

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class SoftDeleteManager {
  async softDeleteCapsule(
    capsuleId: string,
    organizationId: string,
    reason: string
  ): Promise<SoftDeleteResult> {
    
    const transaction = await this.beginTransaction();
    
    try {
      // 1. Validate removal is safe
      const impactAnalysis = await this.analyzeRemovalImpact(capsuleId);
      if (impactAnalysis.riskLevel === 'critical' && !this.hasAdminOverride()) {
        throw new Error('Cannot remove capsule: critical dependencies detected');
      }
      
      // 2. Create removal snapshot
      const snapshot = await this.createRemovalSnapshot(capsuleId, organizationId);
      
      // 3. Update status to 'soft_removed'
      await this.supabase
        .from('capsule_installations')
        .update({
          installation_status: 'soft_removed',
          soft_delete_reason: reason,
          soft_delete_at: new Date().toISOString(),
          removal_snapshot_id: snapshot.id
        })
        .eq('capsule_id', capsuleId)
        .eq('organization_id', organizationId);
      
      // 4. Disable capsule services but keep data
      await this.disableCapsuleServices(capsuleId, organizationId);
      
      // 5. Update dependency graph
      await this.markDependenciesAsOrphaned(capsuleId);
      
      // 6. Schedule cleanup job
      await this.scheduleHardDeleteJob(capsuleId, organizationId, {
        gracePeroid: '30d', // 30 days before hard delete
        conditions: ['no_dependent_capsules', 'no_active_references']
      });
      
      await transaction.commit();
      
      // 7. Log soft delete event
      await this.eventStore.appendEvent({
        capsuleId,
        organizationId,
        eventType: 'soft_removed',
        payload: {
          reason,
          snapshotId: snapshot.id,
          impactLevel: impactAnalysis.riskLevel,
          affectedCapsules: impactAnalysis.directlyAffected.map(c => c.id)
        },
        timestamp: new Date()
      });
      
      return {
        success: true,
        snapshotId: snapshot.id,
        scheduledHardDelete: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000),
        affectedCapsules: impactAnalysis.directlyAffected.length
      };
      
    } catch (error) {
      await transaction.rollback();
      
      return {
        success: false,
        error: error.message,
        impactAnalysis
      };
    }
  }
  
  async restoreSoftDeletedCapsule(
    capsuleId: string,
    organizationId: string
  ): Promise<RestoreResult> {
    
    const installation = await this.getInstallation(capsuleId, organizationId);
    
    if (installation.installation_status !== 'soft_removed') {
      throw new Error('Capsule is not in soft-removed state');
    }
    
    try {
      // 1. Restore from snapshot
      const snapshot = await this.getRemovalSnapshot(installation.removal_snapshot_id);
      await this.restoreFromSnapshot(snapshot);
      
      // 2. Re-enable services
      await this.enableCapsuleServices(capsuleId, organizationId);
      
      // 3. Update status back to active
      await this.supabase
        .from('capsule_installations')
        .update({
          installation_status: 'active',
          soft_delete_reason: null,
          soft_delete_at: null,
          removal_snapshot_id: null,
          restored_at: new Date().toISOString()
        })
        .eq('capsule_id', capsuleId)
        .eq('organization_id', organizationId);
      
      // 4. Restore dependency relationships
      await this.restoreDependencyRelationships(capsuleId);
      
      // 5. Cancel scheduled hard delete
      await this.cancelHardDeleteJob(capsuleId, organizationId);
      
      // 6. Log restoration event
      await this.eventStore.appendEvent({
        capsuleId,
        organizationId,
        eventType: 'restored',
        payload: {
          restoredFrom: 'soft_delete',
          snapshotId: installation.removal_snapshot_id
        },
        timestamp: new Date()
      });
      
      return {
        success: true,
        restoredAt: new Date(),
        snapshotCleaned: false // Keep snapshot for audit
      };
      
    } catch (error) {
      return {
        success: false,
        error: error.message
      };
    }
  }
}

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class HardDeleteManager {
  async hardDeleteCapsule(
    capsuleId: string,
    organizationId: string,
    options: HardDeleteOptions
  ): Promise<HardDeleteResult> {
    
    // Validate hard delete is safe
    const currentDependents = await this.getCurrentDependents(capsuleId);
    if (currentDependents.length > 0 && !options.force) {
      throw new Error(`Cannot hard delete: ${currentDependents.length} dependents still active`);
    }
    
    const deletionPlan = await this.createDeletionPlan(capsuleId, organizationId);
    const transaction = await this.beginTransaction();
    
    try {
      // 1. Final backup before deletion
      const finalBackup = await this.createFinalBackup(capsuleId, organizationId);
      
      // 2. Clean up dependent references
      await this.cleanupDependentReferences(capsuleId, deletionPlan.references);
      
      // 3. Remove knowledge assets
      await this.removeKnowledgeAssets(capsuleId, organizationId);
      
      // 4. Remove vector embeddings
      await this.removeVectorEmbeddings(capsuleId);
      
      // 5. Remove database data
      await this.removeDatabaseData(capsuleId, organizationId, deletionPlan.dataTables);
      
      // 6. Remove file system data
      await this.removeFileSystemData(capsuleId, organizationId);
      
      // 7. Remove configuration
      await this.removeConfiguration(capsuleId, organizationId);
      
      // 8. Remove installation record
      await this.supabase
        .from('capsule_installations')
        .delete()
        .eq('capsule_id', capsuleId)
        .eq('organization_id', organizationId);
      
      // 9. Clean up dependency graph
      await this.cleanupDependencyGraph(capsuleId);
      
      // 10. Remove from search indexes
      await this.removeFromSearchIndexes(capsuleId);
      
      await transaction.commit();
      
      // 11. Log final deletion event (to audit trail, not capsule events)
      await this.auditStore.logDeletion({
        capsuleId,
        organizationId,
        deletedAt: new Date(),
        deletionPlan,
        finalBackupId: finalBackup.id,
        performedBy: options.userId
      });
      
      return {
        success: true,
        deletedItems: deletionPlan.itemCount,
        backupId: finalBackup.id,
        backupRetentionUntil: new Date(Date.now() + 365 * 24 * 60 * 60 * 1000) // 1 year
      };
      
    } catch (error) {
      await transaction.rollback();
      
      return {
        success: false,
        error: error.message,
        partialDeletion: true,
        recoverable: await this.checkRecoverability(capsuleId, organizationId)
      };
    }
  }
  
  private async cleanupDependentReferences(
    capsuleId: string,
    references: Reference[]
  ): Promise<void> {
    
    for (const reference of references) {
      switch (reference.type) {
        case 'code_reference':
          await this.handleCodeReference(reference as CodeReference);
          break;
        case 'config_reference':
          await this.handleConfigReference(reference as ConfigReference);
          break;
        case 'data_reference':
          await this.handleDataReference(reference as DataReference);
          break;
        case 'api_reference':
          await this.handleApiReference(reference as ApiReference);
          break;
      }
    }
  }
  
  private async handleCodeReference(reference: CodeReference): Promise<void> {
    // Strategy depends on reference type and severity
    switch (reference.severity) {
      case 'critical':
        // Replace with stub implementation
        await this.replaceWithStub(reference);
        break;
      case 'important':
        // Comment out and add warning
        await this.commentOutWithWarning(reference);
        break;
      case 'optional':
        // Remove reference entirely
        await this.removeReference(reference);
        break;
    }
  }
}

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class DeprecationManager {
  async initiateDeprecation(
    capsuleId: string,
    deprecationPlan: DeprecationPlan
  ): Promise<DeprecationResult> {
    
    const phases: DeprecationPhase[] = [
      {
        name: 'announcement',
        duration: '30d',
        actions: ['notify_users', 'update_docs', 'log_deprecation_warning']
      },
      {
        name: 'warning_period',
        duration: '60d',
        actions: ['show_warnings', 'suggest_alternatives', 'collect_migration_feedback']
      },
      {
        name: 'migration_assistance',
        duration: '90d',
        actions: ['provide_migration_tools', 'offer_support', 'monitor_adoption']
      },
      {
        name: 'soft_removal',
        duration: '30d',
        actions: ['disable_new_installations', 'maintain_existing', 'final_warnings']
      },
      {
        name: 'hard_removal',
        duration: 'immediate',
        actions: ['remove_capsule', 'cleanup_data', 'archive_documentation']
      }
    ];
    
    for (const phase of phases) {
      await this.executeDeprecationPhase(capsuleId, phase);
      await this.waitForPhaseCompletion(phase.duration);
    }
    
    return {
      success: true,
      totalDuration: phases.reduce((sum, p) => sum + this.parseDuration(p.duration), 0),
      migratedUsers: await this.getMigrationStats(capsuleId)
    };
  }
  
  async executeDeprecationPhase(
    capsuleId: string,
    phase: DeprecationPhase
  ): Promise<void> {
    
    switch (phase.name) {
      case 'announcement':
        await this.sendDeprecationNotifications(capsuleId);
        await this.updateMarketplaceListing(capsuleId, 'deprecated');
        break;
        
      case 'warning_period':
        await this.enableDeprecationWarnings(capsuleId);
        await this.suggestAlternatives(capsuleId);
        break;
        
      case 'migration_assistance':
        await this.deployMigrationTools(capsuleId);
        await this.offerMigrationSupport(capsuleId);
        break;
        
      case 'soft_removal':
        await this.disableNewInstallations(capsuleId);
        await this.sendFinalWarnings(capsuleId);
        break;
        
      case 'hard_removal':
        await this.removeCapsuleFromMarketplace(capsuleId);
        await this.beginRemovalProcess(capsuleId);
        break;
    }
  }
}

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class PhaseOutManager {
  async createPhaseOutPlan(capsuleId: string): Promise<PhaseOutPlan> {
    const currentUsage = await this.analyzeCurrentUsage(capsuleId);
    const features = await this.getCapsuleFeatures(capsuleId);
    const alternatives = await this.findAlternativeFeatures(capsuleId);
    
    const plan: PhaseOutPlan = {
      capsuleId,
      phases: [],
      totalDuration: 0,
      migrationSupport: true
    };
    
    // Group features by usage and criticality
    const featureGroups = this.groupFeaturesByImportance(features, currentUsage);
    
    for (const [importance, featureGroup] of featureGroups) {
      const phase: PhaseOutPhase = {
        name: `phase_out_${importance}`,
        features: featureGroup,
        duration: this.calculatePhaseDuration(importance, featureGroup.length),
        actions: this.determinePhaseActions(importance, featureGroup),
        alternatives: alternatives.filter(alt => 
          featureGroup.some(feature => alt.replacesFeature === feature.id)
        )
      };
      
      plan.phases.push(phase);
      plan.totalDuration += phase.duration;
    }
    
    return plan;
  }
  
  async executePhaseOut(plan: PhaseOutPlan): Promise<PhaseOutResult> {
    const results: PhaseOutPhaseResult[] = [];
    
    for (const phase of plan.phases) {
      const phaseResult = await this.executePhaseOutPhase(phase);
      results.push(phaseResult);
      
      if (!phaseResult.success) {
        // Pause phase-out and notify administrators
        await this.pausePhaseOut(plan.capsuleId, phase.name, phaseResult.error);
        break;
      }
      
      // Wait for phase completion
      await this.monitorPhaseCompletion(phase);
    }
    
    return {
      success: results.every(r => r.success),
      phases: results,
      finalStatus: await this.getFinalCapsuleStatus(plan.capsuleId)
    };
  }
  
  private async executePhaseOutPhase(phase: PhaseOutPhase): Promise<PhaseOutPhaseResult> {
    try {
      for (const action of phase.actions) {
        await this.executePhaseOutAction(action, phase);
      }
      
      return {
        success: true,
        phase: phase.name,
        featuresDisabled: phase.features.length,
        usersImpacted: await this.countImpactedUsers(phase.features)
      };
      
    } catch (error) {
      return {
        success: false,
        phase: phase.name,
        error: error.message,
        rollbackRequired: true
      };
    }
  }
  
  private async executePhaseOutAction(action: PhaseOutAction, phase: PhaseOutPhase): Promise<void> {
    switch (action.type) {
      case 'disable_feature':
        await this.disableFeatures(action.targetFeatures);
        break;
        
      case 'redirect_to_alternative':
        await this.setupRedirects(action.targetFeatures, action.alternatives);
        break;
        
      case 'show_migration_notice':
        await this.enableMigrationNotices(action.targetFeatures);
        break;
        
      case 'reduce_functionality':
        await this.reduceFunctionality(action.targetFeatures, action.reductionLevel);
        break;
        
      case 'archive_data':
        await this.archiveFeatureData(action.targetFeatures);
        break;
    }
  }
}

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class ImpactAnalyzer {
  async performComprehensiveAnalysis(capsuleId: string): Promise<RemovalImpactReport> {
    const report: RemovalImpactReport = {
      capsuleId,
      analysisTimestamp: new Date(),
      overallRisk: 'unknown',
      impacts: {
        technical: await this.analyzeTechnicalImpact(capsuleId),
        business: await this.analyzeBusinessImpact(capsuleId),
        user: await this.analyzeUserImpact(capsuleId),
        data: await this.analyzeDataImpact(capsuleId)
      },
      mitigation: await this.generateMitigationPlan(capsuleId),
      timeline: await this.generateRemovalTimeline(capsuleId),
      recommendations: []
    };
    
    // Calculate overall risk
    report.overallRisk = this.calculateOverallRisk(report.impacts);
    
    // Generate recommendations based on analysis
    report.recommendations = this.generateRecommendations(report);
    
    return report;
  }
  
  private async analyzeTechnicalImpact(capsuleId: string): Promise<TechnicalImpact> {
    const dependencies = await this.getDependencyGraph(capsuleId);
    const integrations = await this.getIntegrationPoints(capsuleId);
    const services = await this.getProvidedServices(capsuleId);
    
    return {
      dependentCapsules: dependencies.dependents.length,
      criticalDependencies: dependencies.dependents.filter(d => d.strength === 'critical').length,
      integrationPoints: integrations.length,
      providedServices: services.length,
      estimatedDowntime: this.calculateDowntime(dependencies, integrations, services),
      rollbackComplexity: this.assessRollbackComplexity(dependencies),
      alternativesSufficiency: await this.assessAlternatives(capsuleId)
    };
  }
  
  private async analyzeBusinessImpact(capsuleId: string): Promise<BusinessImpact> {
    const usage = await this.getBusinessUsage(capsuleId);
    const processes = await this.getBusinessProcesses(capsuleId);
    const revenue = await this.getRevenueImpact(capsuleId);
    
    return {
      affectedOrganizations: usage.organizationCount,
      affectedUsers: usage.userCount,
      criticalProcesses: processes.filter(p => p.criticality === 'critical').length,
      businessContinuityRisk: this.assessBusinessContinuityRisk(processes),
      revenueImpact: revenue.estimated,
      complianceRisk: await this.assessComplianceRisk(capsuleId),
      customerSatisfactionRisk: this.assessCustomerSatisfactionRisk(usage)
    };
  }
  
  private async generateMitigationPlan(capsuleId: string): Promise<MitigationPlan> {
    const alternatives = await this.findAlternativeCapsules(capsuleId);
    const migrationPaths = await this.identifyMigrationPaths(capsuleId);
    const riskReduction = await this.identifyRiskReductionMeasures(capsuleId);
    
    return {
      alternatives,
      migrationPaths,
      riskReductionMeasures: riskReduction,
      estimatedMigrationEffort: this.calculateMigrationEffort(migrationPaths),
      successProbability: this.calculateMigrationSuccessProbability(alternatives, migrationPaths),
      contingencyPlans: await this.developContingencyPlans(capsuleId)
    };
  }
  
  async generateRemovalTimeline(capsuleId: string): Promise<RemovalTimeline> {
    const impact = await this.analyzeTechnicalImpact(capsuleId);
    const businessImpact = await this.analyzeBusinessImpact(capsuleId);
    
    const timeline: RemovalTimeline = {
      phases: [
        {
          name: 'Impact Assessment & Planning',
          duration: 14, // days
          activities: [
            'Complete impact analysis',
            'Identify migration paths',
            'Prepare alternatives',
            'Stakeholder communication'
          ]
        },
        {
          name: 'Migration Preparation',
          duration: 30,
          activities: [
            'Set up alternative capsules',
            'Create migration tools',
            'Test migration procedures',
            'Train support team'
          ]
        },
        {
          name: 'User Migration',
          duration: this.calculateMigrationDuration(businessImpact.affectedUsers),
          activities: [
            'Begin user migration',
            'Monitor migration progress',
            'Provide migration support',
            'Address migration issues'
          ]
        },
        {
          name: 'Soft Removal',
          duration: 30,
          activities: [
            'Disable new installations',
            'Mark as deprecated',
            'Final migration push',
            'Monitor for issues'
          ]
        },
        {
          name: 'Hard Removal',
          duration: 7,
          activities: [
            'Final data backup',
            'Remove capsule',
            'Clean up references',
            'Archive documentation'
          ]
        }
      ],
      totalDuration: 0,
      criticalPath: [],
      dependencies: []
    };
    
    timeline.totalDuration = timeline.phases.reduce((sum, phase) => sum + phase.duration, 0);
    timeline.criticalPath = this.identifyCriticalPath(timeline.phases);
    timeline.dependencies = this.identifyTimelineDependencies(timeline.phases);
    
    return timeline;
  }
}

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class RemovalEventSourcing {
  async createRemovalEventStream(
    capsuleId: string,
    organizationId: string
  ): Promise<RemovalEventStream> {
    
    const streamId = `removal:${capsuleId}:${organizationId}`;
    
    return {
      streamId,
      events: [],
      checkpoints: [],
      reversibilityIndex: new Map(),
      
      async appendEvent(event: RemovalEvent): Promise<void> {
        // Add reversibility information to each event
        event.reversibilityInfo = await this.calculateReversibility(event);
        
        this.events.push(event);
        this.reversibilityIndex.set(event.id, event.reversibilityInfo);
        
        // Store in event store
        await this.eventStore.append(streamId, event);
        
        // Create checkpoint if needed
        if (event.type === 'phase_completed') {
          await this.createCheckpoint(streamId, event);
        }
      },
      
      async reverseToCheckpoint(checkpointId: string): Promise<ReversalResult> {
        const checkpoint = this.checkpoints.find(c => c.id === checkpointId);
        if (!checkpoint) {
          throw new Error(`Checkpoint ${checkpointId} not found`);
        }
        
        const eventsToReverse = this.events.filter(e => 
          e.timestamp > checkpoint.timestamp
        ).reverse();
        
        const reversalResults: EventReversalResult[] = [];
        
        for (const event of eventsToReverse) {
          const reversalResult = await this.reverseEvent(event);
          reversalResults.push(reversalResult);
          
          if (!reversalResult.success) {
            // Stop reversal and report partial success
            return {
              success: false,
              partialReversal: true,
              reversedEvents: reversalResults.filter(r => r.success).length,
              error: reversalResult.error
            };
          }
        }
        
        return {
          success: true,
          reversedEvents: reversalResults.length,
          restoredToCheckpoint: checkpointId
        };
      }
    };
  }
  
  private async reverseEvent(event: RemovalEvent): Promise<EventReversalResult> {
    const reversibility = this.reversibilityIndex.get(event.id);
    
    if (!reversibility || !reversibility.reversible) {
      return {
        success: false,
        eventId: event.id,
        error: 'Event is not reversible',
        reason: reversibility?.irreversibilityReason
      };
    }
    
    try {
      switch (event.type) {
        case 'soft_deleted':
          await this.reverseSoftDelete(event);
          break;
        case 'configuration_removed':
          await this.restoreConfiguration(event);
          break;
        case 'dependencies_updated':
          await this.restoreDependencies(event);
          break;
        case 'data_archived':
          await this.restoreData(event);
          break;
        case 'services_disabled':
          await this.restoreServices(event);
          break;
        default:
          throw new Error(`Unknown event type: ${event.type}`);
      }
      
      return {
        success: true,
        eventId: event.id,
        restoredState: event.previousState
      };
      
    } catch (error) {
      return {
        success: false,
        eventId: event.id,
        error: error.message
      };
    }
  }
}