Appendix A: n8n Node Type Reference

This appendix maps every n8n node type used in the Almafrica workflow diagrams to the concrete components in the codebase. Each node type is listed with the Almafrica classes that implement the corresponding pattern, organized by layer (Backend, Mobile, Web).

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Table of Contents

1. Webhook Trigger
2. Schedule Trigger
3. Manual Trigger
4. HTTP Request
5. Function
6. IF (Conditional)
7. Switch (Multi-Branch)
8. Set (Transform)
9. Merge (Parallel Coordination)
10. Wait (Delay / Backoff)
11. Loop (Iterative)
12. Error Trigger
13. Database Read/Write
14. S3 (DigitalOcean Spaces)
15. SignalR (Real-Time Hub)
16. SMS (Africa's Talking)
17. Push Notification (FCM)
18. Code (Complex Inline Logic)
19. NoOp (Skip / Passthrough)

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1. Webhook Trigger

Represents an incoming HTTP request that starts a workflow. Maps to every API controller endpoint.

Backend -- API Controllers

All controllers live under backend/Almafrica.API/Controllers/.

Controller	Primary Endpoints
AuthController	Login, register, refresh token, logout, my-permissions-by-role
AgentsController	CRUD agents, assign farmers, performance
AnalyticsController	Dashboard stats, reports, aggregations
BaseConfigurationController	Master configuration CRUD
BulkOperationsController	Bulk import farmers/clients via Excel
CampaignsController	Campaign CRUD, publish, close, runs
ClientsController	Client CRUD, approval workflow, deactivation
CollectionPointsController	Collection point CRUD
CropBatchesController	Batch creation, assessment, allocation
CropsController	Crop type CRUD
DeviceController	Device registration, heartbeat
FarmersController	Farmer CRUD, approval workflow, profile
FarmerVisitsController	Field visit CRUD
IpWhitelistController	IP whitelist management
LocationsController	Province/territory/village lookup
LoginHistoryController	Login history audit
MasterDataController	Master data sync endpoint (delta)
MobileSurveyController	Mobile survey form submission
MultipartUploadController	Chunked file upload (init, part, complete)
OrdersController	Order CRUD, status transitions, allocation
OtpController	OTP generation and verification
PasswordPoliciesController	Password policy CRUD
PermissionsController	Permission matrix CRUD
PermissionTemplatesController	Permission template CRUD
ProductionsController	Production cycle CRUD
ProfileController	User profile, avatar upload
QualityAssessmentsController	Quality assessment CRUD, checklist
RolesController	Role CRUD
SessionsController	Session list, terminate, activity
StockController	Stock query, adjustments
StockOutsController	Stock out recording
SurveyMasterDataController	Survey-specific master data
SurveyResponsesController	Survey response CRUD, export
SystemConfigurationsController	System-wide settings
TransfersController	Transfer CRUD, approve, dispatch, receive
TwoFactorController	2FA enable/disable, verify
UploadController	Simple file upload
UserGroupsController	User group CRUD
UserRolesController	User-role assignment
UsersManagementController	User CRUD, activate/deactivate
VersionController	API version check
WarehouseStaffController	Warehouse operator assignment

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2. Schedule Trigger

Represents a timer or cron that fires a workflow on a recurring schedule.

Backend

Component	Schedule Pattern	Purpose
ExpiryAlertBackgroundService	Periodic (hosted service)	Checks crop batches nearing best-before date, sends notifications

Mobile

Component	Schedule Pattern	Purpose
OfflineQueueProcessor	Periodic timer	Drains offline sync queue, retries failed uploads
BackgroundSyncService	Periodic / on-connectivity	Triggers full or delta sync when device regains network
SyncCoordinator	Login + periodic	Orchestrates ordered sync of all entity types
LoginSyncService	On login	Runs initial data pull immediately after authentication

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3. Manual Trigger

Represents a user-initiated action that starts a workflow (button tap, form submit).

Mobile -- User-Initiated Actions

Component	Trigger	Purpose
FarmerDraftService	"Save" / "Submit" button	Creates or updates a farmer draft offline
ClientDraftService	"Save" / "Submit" button	Creates or updates a client draft offline
ClientFormDraftService	"Save" button	Saves client form draft state
ClientCropDemandDraftService	"Save demand"	Saves client crop demand draft
ProductionCycleDraftService	"Save cycle"	Saves production cycle draft
OrderService	"Place order" / "Update status"	Creates order or advances status
UploadService	"Upload photo"	Initiates photo upload from camera/gallery
ChunkedUploadService	Large file submit	Starts chunked upload flow
SyncManager.fullSync()	"Sync now" button	Triggers full manual sync
AssessmentPhotoService	Camera capture	Takes and queues assessment photo
SurveyFormProvider	"Submit survey"	Submits survey response offline

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4. HTTP Request

Represents an outbound HTTP call to an external API or the Almafrica backend.

Mobile -- Remote Datasources

All remote datasources live under mobile/mon_jardin/lib/data/datasources/remote/.

Datasource	Target API	Purpose
MasterDataRemoteDatasource	GET /api/masterdata/*	Pulls delta master data (provinces, crops, configs)
CropRemoteDatasource	GET /api/crops/*	Fetches crop types and categories
CampaignRemoteDatasource	GET/POST /api/campaigns/*	Fetches campaigns, submits survey responses
AssessmentRemoteDatasource	GET/POST /api/quality-assessments/*	Fetches QA questions, submits assessments
DeviceRemoteDatasource	POST /api/device/*	Registers device, heartbeat
StockLossRemoteDatasource	POST /api/stock/*	Submits stock loss records
StockTransferRemoteDatasource	POST /api/transfers/*	Submits stock transfers
ClientMasterDataRemoteDatasource	GET /api/masterdata/client/*	Pulls client-specific master data

Mobile -- Services Making HTTP Calls

Service	Calls	Purpose
ApiClient	All endpoints	Centralized HTTP client with auth headers, retry
JwtAuthService	POST /api/auth/login	Login, refresh, per-role permission fetch
ProfileService	GET/PUT /api/profile	Fetch and update user profile
FarmerService	GET/POST /api/farmers	Sync farmers to/from backend
ClientService	GET/POST /api/clients	Sync clients to/from backend
OrderService	GET/POST /api/orders	Sync orders to/from backend
HarvestService	POST /api/productions/*/harvests	Submit harvests
ProductionCycleService	GET/POST /api/productions	Sync production cycles
CenterStockService	GET /api/stock/*	Fetch center stock data
WarehouseStaffService	GET /api/warehouse-staff	Fetch warehouse staff assignments
ClientDocumentService	POST /api/clients/*/documents	Upload client documents
ClientCropDemandService	GET/POST /api/clients/*/demands	Sync crop demands

Mobile -- Sync Services (HTTP Push/Pull)

Sync Service	Direction	Purpose
FarmersSyncService	Pull	Delta-sync farmers from backend
ClientsSyncService	Pull	Delta-sync clients from backend
OrderSyncService	Push + Pull	Sync orders bidirectionally
ProductionCycleSyncService	Push + Pull	Sync production cycles
StockSyncService	Pull	Pull stock data for warehouse view
StockLossSyncService	Push	Push offline stock losses
StockTransferSyncService	Push	Push offline stock transfers
CropDemandsSyncService	Push + Pull	Sync client crop demands
SurveyResponseSyncService	Push	Push offline survey responses
SurveyFileSyncService	Push	Push queued survey file attachments
CampaignPullSyncService	Pull	Pull campaign definitions
MasterDataSyncService	Pull	Delta-sync all master data tables
AssessmentQuestionsSyncService	Pull	Sync QA checklist questions

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5. Function

Represents a processing step that transforms data or applies business logic.

Backend -- Application & Infrastructure Services

Service	Layer	Purpose
AuthService	Infrastructure	Login, JWT generation, permission resolution
FarmerService	Infrastructure	Farmer CRUD, search, filtering
FarmerValidationService	Infrastructure	Farmer field validation rules
FarmerBulkService	Infrastructure	Bulk farmer import from Excel
FarmerCropOfferService	Infrastructure	Farmer crop offer CRUD
FarmerApprovalService	Infrastructure	Farmer approval/rejection workflow
FarmerAgentService	Infrastructure	Agent-farmer assignment logic
FarmerCollectionPointService	Infrastructure	Farmer-collection point assignment
FarmerVisitService	Infrastructure	Field visit CRUD
ClientService	Infrastructure	Client CRUD, search, filtering
ClientApprovalService	Infrastructure	Client approval/rejection workflow
ClientCropDemandService	Infrastructure	Client crop demand CRUD
ClientBulkImportService	Infrastructure	Bulk client import from Excel
OrderService	Infrastructure	Order lifecycle (create, confirm, process, deliver, cancel)
CropBatchService	Infrastructure	Batch creation, assessment marking, allocation
CropService	Infrastructure	Crop type CRUD
StockService	Infrastructure	Stock queries, aggregation
StockMovementRecorder	Infrastructure	Records atomic stock movements
StockAdjustmentService	Infrastructure	Manual stock adjustments
StockOutService	Infrastructure	Stock out deductions
StockLossService	Infrastructure	Stock loss recording and approval
TransferService	Infrastructure	Transfer workflow (approve, dispatch, complete, cancel)
QualityAssessmentService	Infrastructure	QA CRUD, scoring
QualityAssessmentQuestionService	Infrastructure	QA checklist question management
ProductionService	Infrastructure	Production cycle CRUD
CampaignService	Infrastructure	Campaign CRUD, publish, close
MobileCampaignService	Infrastructure	Mobile-optimized campaign data
QuestionnaireService	Infrastructure	Questionnaire version management
SurveyResponseService	Infrastructure	Survey response storage and validation
SurveyExportService	Infrastructure	Survey data export
SurveyMasterDataService	Infrastructure	Survey-specific master data
CollectionPointService	Infrastructure	Collection point CRUD
ConfigurationService	Infrastructure	System configuration management
MasterDataService	Infrastructure	Master data delta sync logic
AnalyticsService	Infrastructure	Dashboard analytics aggregation
MediaUploadService	Infrastructure	Media file upload processing
MultipartUploadService	Infrastructure	Chunked upload orchestration
OtpService	Infrastructure	OTP generation, sending, verification
TwoFactorService	Infrastructure	TOTP setup and verification
SessionManagementService	Infrastructure	Session create, list, terminate
LoginHistoryService	Infrastructure	Login history tracking
IpWhitelistService	Infrastructure	IP whitelist enforcement
PasswordPolicyService	Infrastructure	Password policy enforcement
PermissionTemplateService	Infrastructure	Permission template CRUD
RoleManagementService	Infrastructure	Role CRUD, role-permission assignment
RoleAuditService	Infrastructure	Role change audit trail
UserGroupService	Infrastructure	User group CRUD
WarehouseStaffService	Infrastructure	Warehouse staff assignment
BulkUserOperationsService	Infrastructure	Bulk user import/export
AgentService	Infrastructure	Agent CRUD, provisioning
AgentProfileProvisioningService	Infrastructure	Auto-creates Agent profile on user creation
CurrentUserService	Infrastructure	Resolves current authenticated user context
ExcelService	Infrastructure	Excel file generation and parsing
ExcelExportService	Infrastructure	Export data to Excel format
ExcelTemplateService	Infrastructure	Generate Excel import templates
ConfigurableExcelParser	Infrastructure	Configurable Excel column mapping

Mobile -- Business Logic Services

Service	Purpose
ValidationService	Client-side form validation
SyncConflictService	Detects and resolves sync conflicts
EnhancedConflictService	Advanced conflict resolution strategies
ConflictResolver	Strategy pattern for merge conflicts
PendingUpdatesService	Tracks pending offline updates
AgentStatusService	Resolves agent online/offline status
AgentContext	Holds current agent identity context
CropManagementService	Local crop data management
DraftFileService	Manages file references for draft entities
ConnectivityService	Network connectivity monitoring
UnifiedSyncStatusService	Aggregated sync status for all entity types
SyncAnalyticsService	Tracks sync performance metrics
SyncHistoryService	Logs sync operations for debugging
ClientMasterDataResolver	Resolves master data IDs to display names

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6. IF (Conditional)

Represents a binary decision (true/false routing).

Backend

Pattern	Location	Condition
Approval guard	Order.Confirm()	Status != Pending -> reject
Assessment guard	CropBatch.MarkAsAssessed()	acceptedQuantity > initialQuantity -> error
Transfer state check	Transfer.CanBeApproved()	Status == Pending && HasItems()
Transfer dispatch check	Transfer.CanBeDispatched()	Status == Approved
Self-approval block	StockLossRecord.Approve()	approverUserId == RecordedByUserId -> reject
Offline auth check	OfflineAuthService	hasValidOfflineToken -> allow / deny
Delta sync check	SyncMetadataService	hasLastSyncTime -> delta / full
Network connectivity	ConnectivityService	isOnline -> remote call / local fallback

Mobile

Pattern	Location	Condition
Draft vs submit	FarmerDraftService	isDraft -> save locally / push to queue
Online check	SyncManager	isConnected -> sync / defer
Queue empty	OfflineQueueProcessor	queue.isEmpty -> idle / process next
Conflict detection	ConflictResolver	localVersion != remoteVersion -> merge / overwrite
Chunked upload resume	ChunkedUploadService	hasPartialUpload -> resume / start fresh

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7. Switch (Multi-Branch)

Represents a multi-way branch based on a value (enum, string).

Backend

Pattern	Switch Value	Branches
Order status machine	OrderStatus	Pending, Confirmed, InProgress, OutForDelivery, Delivered, Cancelled
Batch status machine	BatchStatus	PendingAssessment, Assessed, PartiallyAllocated, FullyAllocated
Transfer status machine	TransferStatus	Pending, Approved, InTransit, Completed, Cancelled
StockMovement type	StockMovementType	StockIn, Sale, Transfer, Disposal, Loss, Adjustment
Campaign status	CampaignStatus	Draft, Published, Closed
Production status	ProductionStatus	Planned, Active, Harvesting, Completed, Cancelled
Investigation status	InvestigationStatus	Open, InProgress, Resolved, Closed
Approval status	ApprovalStatus	PendingApproval, Approved, Rejected
QA question type	QuestionType	Numeric, Boolean, SelectOptions, Date

Mobile

Pattern	Switch Value	Branches
Sync entity type	SyncEntityType	farmer, client, order, orderPayment, orderStatusTransition, production, harvest, stockLoss, stockTransfer, cropDemand, surveyResponse
Sync direction	Pull / Push	Delta-pull from server / push local changes

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8. Set (Transform)

Represents data transformation -- mapping one shape to another (DTO mapping, model conversion).

Backend

Pattern	Source -> Target	Location
Entity -> DTO	Farmer -> FarmerDto	Service layer mapping
Entity -> DTO	Client -> ClientDto	Service layer mapping
Entity -> DTO	Order -> OrderDto	Service layer mapping
Entity -> DTO	CropBatch -> CropBatchDto	Service layer mapping
Entity -> DTO	QualityAssessment -> QADto	Service layer mapping
Entity -> DTO	Campaign -> CampaignDto	Service layer mapping
Create command -> Entity	CreateFarmerRequest -> Farmer.Create()	Factory methods
Create command -> Entity	CreateOrderRequest -> Order.Create()	Factory methods
Excel row -> Entity	Excel parsed row -> Farmer / Client	FarmerBulkService / ClientBulkImportService

Mobile

Pattern	Source -> Target	Location
JSON -> Model	API JSON -> Dart model	Remote datasource fromJson()
Model -> SQLite row	Dart model -> Map<String, dynamic>	Local datasource toMap()
SQLite row -> Model	Map<String, dynamic> -> Dart model	Local datasource fromMap()
Draft -> API payload	Draft model -> JSON request body	Draft services
Sync response -> local	API delta response -> local DB upsert	Sync services

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9. Merge (Parallel Coordination)

Represents joining multiple parallel branches back together.

Backend

Pattern	Parallel Branches	Join Point
Order allocation	Multiple batch allocations	OrderService -- aggregates allocated quantities
Bulk import	Parallel row processing	FarmerBulkService -- collects results and errors
Analytics aggregation	Multiple metric queries	AnalyticsService -- merges stats into dashboard DTO
Transfer completion	Per-item received quantities	TransferService -- joins items with discrepancy check

Mobile

Pattern	Parallel Branches	Join Point
Login sync	Master data + farmers + clients + orders	LoginSyncService -- all must complete
Full sync	10+ entity type syncs	SyncCoordinator -- sequential with progress
Offline queue drain	Parallel retries per entity	OfflineQueueProcessor -- collects results
Chunked upload	Parallel part uploads	ChunkedUploadService -- all parts then complete

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10. Wait (Delay / Backoff)

Represents intentional delays, retries with backoff, or scheduled waits.

Mobile

Component	Strategy	Purpose
ExponentialBackoffService	Exponential backoff with jitter	Retry failed API calls
RetryExecutorService	Configurable retry policy	Execute retryable operations
RetryPolicy	Max retries, delay, backoff factor	Defines retry parameters
OfflineQueueProcessor	Timer interval	Periodically checks and drains queue
BackgroundSyncService	Debounce on connectivity change	Waits for stable connection before sync

Backend

Component	Strategy	Purpose
ExpiryAlertBackgroundService	Hosted service timer	Periodic batch expiry scan

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11. Loop (Iterative)

Represents processing a collection of items one at a time or in batches.

Backend

Pattern	Collection	Loop Body
Bulk farmer import	Excel rows	Validate + create each farmer
Bulk client import	Excel rows	Validate + create each client
Order allocation	Available batches	Allocate from each batch until fulfilled
Transfer items processing	TransferItem list	Record stock movement per item
Stock loss items processing	StockLossItem list	Reduce stock per batch
Survey export	Survey responses	Transform each response to export row
Master data sync	Entity types	Pull each master data table

Mobile

Pattern	Collection	Loop Body
Offline queue processing	Pending queue items	Process each queued operation
Master data sync	~26 master data tables	Pull and upsert each table
Chunked upload parts	File chunks	Upload each part with retry
Delta sync pages	Paginated API response	Fetch and upsert each page
Entity sync	Entity type list	Sync each entity type in order

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12. Error Trigger

Represents exception handling, error recovery, and fault logging.

Backend

Pattern	Location	Handling
ValidationException	Domain entities	Thrown on invalid state transitions
InvalidOperationException	Domain methods	Thrown on business rule violations
Global exception middleware	API pipeline	Catches unhandled exceptions, returns 4xx/5xx
AuditLogService	Cross-cutting	Logs security-sensitive operations

Mobile

Pattern	Location	Handling
Sync error handling	All sync services	Logs error, marks entity for retry
SyncConflictService	Conflict detection	Creates sync_conflicts table entry
SyncAnalyticsService	All sync operations	Records success/failure metrics
SyncNotificationService	User-facing	Shows error toast/snackbar
Queue retry tracking	SyncQueueService	Increments retry count, marks permanent failure
EnhancedConflictService	Advanced conflicts	Applies resolution strategies, logs outcome

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13. Database Read/Write

Represents reading from or writing to a database.

Backend -- PostgreSQL (via Entity Framework Core)

Repository / DbContext	Tables	Operations
ApplicationDbContext	All domain entities	Full CRUD via EF Core
ASP.NET Identity	AspNetUsers, AspNetRoles, AspNetUserRoles	User/role management
Domain entity tables	Farmers, Clients, Orders, OrderItems, CropBatches, StockMovements, Transfers, QualityAssessments, etc.	Business data CRUD
Configuration tables	~35 config entity tables with translations	Master data storage

Mobile -- SQLite (via sqflite)

Component	Tables	Operations
DatabaseHelper	All local tables	Schema creation, migrations
Farmer local datasource	local_farmers, farmer_crops	Offline farmer storage
Client local datasource	local_clients, local_client_crop_demands	Offline client storage
Order local datasource	local_orders, local_order_items	Offline order storage
Production local datasource	local_production_cycles, local_production_inputs, local_production_harvests	Offline production data
Campaign local datasource	campaigns_cache, survey_responses, survey_master_data_cache, survey_file_queue	Offline survey data
Stock local datasource	stock_losses, stock_transfers, center_stock_cache, stock_batch_cache, stock_aggregation_cache, stock_cache_metadata	Offline stock data
Master data tables	provinces, territories, villages, crop_categories, crop_types, seed_sources, fertilizer_types, pesticide_types, and ~20 more	Cached reference data
Sync infrastructure	sync_queue, sync_metadata, sync_conflicts, sync_analytics, sync_history, api_response_cache	Sync state tracking
Chunked uploads	chunked_uploads, chunked_upload_parts	Upload resume state
Farmer visits	local_farmer_visits	Offline visit data
Client documents	client_documents	Offline document metadata

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14. S3 (DigitalOcean Spaces)

Represents object storage operations (file upload, download, signed URLs).

Backend

Component	Operations	Purpose
DigitalOceanSpacesService	PutObject, GetPresignedUrl, DeleteObject	File storage for photos, documents, exports
MediaUploadService	Upload with content-type detection	Profile photos, assessment photos, crop photos
MultipartUploadService	InitiateMultipartUpload, UploadPart, CompleteMultipartUpload	Large file chunked upload
ExcelExportService	PutObject	Export Excel files to Spaces for download

Mobile

Component	Operations	Purpose
UploadService	HTTP PUT to presigned URL	Photo uploads
ChunkedUploadService	Multi-part upload via API	Large file uploads with resume
AssessmentPhotoService	Queue + upload	Assessment photo pipeline
DraftFileService	Local file reference management	Track files pending upload
SurveyFileSyncService	Push queued files	Upload survey attachments

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15. SignalR (Real-Time Hub)

Represents real-time bidirectional communication.

Backend

Component	Hub Route	Purpose
PermissionHub	/hubs/permissions	Real-time permission revocation and updates

Mobile

Component	Connection	Purpose
PermissionSyncService	SignalR client to /hubs/permissions	Listens for permission revocation events, refreshes per-role permissions

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16. SMS (Africa's Talking)

Represents outbound SMS sending.

Backend

Component	Provider	Purpose
OtpService	Africa's Talking (configured in appsettings.json)	Sends OTP codes via SMS for phone verification

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17. Push Notification (FCM)

Represents mobile push notifications via Firebase Cloud Messaging.

Backend

Component	Status	Purpose
PushNotificationService	Stub / partial implementation	Sends push notifications to registered mobile devices
ExpiryAlertBackgroundService	Uses notification service	Batch expiry alerts

Mobile

Component	Purpose
DeviceRemoteDatasource	Registers FCM token with backend

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18. Code (Complex Inline Logic)

Represents complex procedural logic that does not fit a simple function or IF node.

Backend

Pattern	Location	Logic
Order allocation algorithm	OrderService / CropBatchService	FIFO allocation across multiple batches
Batch number generation	CropBatch.SetBatchNumber()	Year + sequence number formatting
Quality scoring	QualityAssessmentService	Multi-criteria QA scoring per crop category
Transfer discrepancy	TransferService.Complete()	Expected vs received quantity comparison and investigation creation
Profile completeness	Farmer.GetProfileCompletenessPercent()	30-field weighted completeness calculation
Delta sync logic	MasterDataService	Determines changed records since last sync timestamp
Bulk import parsing	ConfigurableExcelParser	Dynamic column mapping from Excel to entities

Mobile

Pattern	Location	Logic
Offline queue processing	OfflineQueueProcessor	Priority-based drain with retry and dead-letter
Conflict resolution	ConflictResolver	Field-level merge with last-writer-wins fallback
Sync coordination	SyncCoordinator	Ordered entity sync with dependency resolution
Pull scope resolution	PullScopeResolver	Determines which data to pull based on user role
Exponential backoff	ExponentialBackoffService	Calculates delay with jitter
Database migration chain	DatabaseHelper	Sequential migration from v1 through v33+

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19. NoOp (Skip / Passthrough)

Represents a no-operation path -- when a condition is false and no action is needed.

Backend

Pattern	Location	Skip Condition
Delta sync empty	MasterDataService	No changes since last sync -> return empty
Approval self-check	Order/Transfer/Loss approval	Already in target state -> no-op
Soft delete already deleted	Various entities	IsDeleted == true -> skip
Duplicate queue item	Sync processing	Already processed -> skip

Mobile

Pattern	Location	Skip Condition
Queue empty	OfflineQueueProcessor	No pending items -> idle
No connectivity	SyncManager	Offline -> defer sync
No delta changes	Sync services	lastSyncTime unchanged -> skip pull
Already synced	SyncMetadataService	Entity up-to-date -> skip
Single dashboard	ActiveRoleManager	Only 1 dashboard -> skip hub, go direct

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Quick Reference Matrix

n8n Node	Backend Count	Mobile Count	Primary Pattern
Webhook Trigger	42 controllers	--	REST API endpoints
Schedule Trigger	1	4	Background timers
Manual Trigger	--	11+	User actions
HTTP Request	--	8 datasources, 25+ services	API calls
Function	50+ services	15+ services	Business logic
IF	8+ patterns	5+ patterns	Guard clauses
Switch	9 state machines	2	Enum routing
Set	Entity <-> DTO	JSON <-> Model <-> SQLite	Data mapping
Merge	4 patterns	4 patterns	Parallel join
Wait	1	5	Retry/backoff
Loop	7 patterns	5 patterns	Collection iteration
Error Trigger	4 patterns	6 patterns	Exception handling
Database R/W	PostgreSQL + EF Core	SQLite + sqflite	Data persistence
S3	4 services	5 services	File storage
SignalR	1 hub	1 client	Real-time events
SMS	1 service	--	OTP delivery
Push Notification	1 stub	1 registration	Mobile alerts
Code	7 patterns	6 patterns	Complex logic
NoOp	4 patterns	5 patterns	Skip paths