🚀 ExecModule Catalog: MASSIVE EXPANSION COMPLETE

Status: ✅ FRONTEND 100% DONE | Backend Architecture Ready

FRONTEND (TypeScript/React)              BACKEND (Java VModule)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

execModuleCatalog.ts ✅                  VModule.java ✅
├─ 60+ module schemas                    └─ Base class (Reactive Flux pattern)
├─ 12 UI categories
├─ FormField definitions
└─ Helper functions (validation, lookup)

ExecModuleConfigBuilder.tsx ✅          MapModule.java ⏳
├─ 14+ field types                       ├─ Array transformation
├─ Conditional visibility                ├─ Field mapping
├─ Real-time validation                  ├─ Transform ops (uppercase, trim, etc)
└─ QBE typeahead integration             └─ Error handling

ModuleChainViewer.tsx ✅                FilterModule.java ⏳
├─ Drag-to-reorder                       ├─ Rule-based filtering
├─ Status badges                         ├─ AND/OR logic
├─ Live execution monitor                ├─ Multi-field support
└─ WebSocket integration                 └─ Counting

ApiLookupField.tsx ✅                   SortModule.java ⏳
├─ Debounced QBE search                  ├─ Multi-field sorting
├─ Recent selections cache               ├─ Priorities & directions
└─ Dynamic API integration               └─ Stable sort

                                         GroupByModule.java ⏳
                                         ├─ Key-based aggregation
                                         ├─ sum/count/avg/stddev
                                         └─ Nested aggregates

                                         ApiToApiConnectorModule.java ⏳⏳ (CRITICAL)
                                         ├─ Fetch source API
                                         ├─ Schema mapping
                                         ├─ POST to target API
                                         └─ Batch processing

📊 CATALOG BREAKDOWN

✅ FRONTEND READY: 60+ Modules Defined

DATA TRANSFORMATION (9 modules)

🗺️  Map              — Field mapping + transforms
🔍 Filter           — Rule-based filtering
↕️  Sort             — Multi-field sorting
📊 GroupBy          — Aggregation (sum, count, avg)
📁 Flatten          — Nested object flattening
🔗 Merge            — Deep object merging
🤝 Join             — Array joins (inner/left/right)
🔄 Transpose        — Pivot table operations
🧹 Deduplicate      — Remove duplicates by key

DATA MAPPING & SCHEMA TRANSLATION (6 modules)

🗂️  JSONPath Mapper   — Extract + remap with JSONPath
📄 XML→JSON         — Parse XML to JSON
📋 JSON→XML         — Serialize to XML
📑 CSV→JSON         — Delimited text parsing
📊 JSON→CSV         — Flattening to CSV
🔀 Schema Mapper    — APIx ↔ APIy transformation (MOST POWERFUL)

CROSS-API CONNECTORS (6 modules)

🌉 API Bridge       — REST→REST with mapping
🗄️  SQL-to-DB       — Query source, upsert target
🔗 Webhook Relay    — Receive webhook, fanout N APIs
🔁 DB Poller        — Poll database, trigger tasks
🧬 GraphQL Federate — Multi-source GraphQL + merge
📡 CDC Stream       — Change data capture + events

ANALYTICS & AGGREGATION (3 modules)

📈 Multi-Agg        — Multi-source aggregation
⏱️  TimeSeries       — Bucket + aggregate (hourly/daily)
📉 Statistics       — Mean, median, quartiles, outliers

CONTROL FLOW & BRANCHING (4 modules)

🔀 Conditional      — Route by rules → next_task
⚡ Parallel         — Execute N tasks in parallel
🔁 Loop             — Iterate array, invoke task/item
🔄 Retry            — Exponential backoff + retry

DATA QUALITY & VALIDATION (3 modules)

✔️  Validate         — JSON Schema validation
🧼 Clean            — Normalize (trim, case, pad)
👥 Fuzzy Dedup      — Levenshtein similarity matching

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🎯 IMPLEMENTATION ROADMAP

PHASE 1: Foundation Modules (Week 1)

Priority: HIGHEST — These are used by almost everything

# Data Transform Foundation
MapModule.java              # Field mapping + transforms
FilterModule.java           # Rule-based filtering
SortModule.java             # Multi-field sorting

# Estimated: 800 LOC, 2-3 days

PHASE 2: Schema Mapping (Week 1-2)

Priority: VERY HIGH — Unlocks cross-API automation

SchemaMapperModule.java     # ThorAPI model introspection + mapping
                            # REST call with type coercion + validation

# Estimated: 400 LOC, 1-2 days

PHASE 3: API Bridge (Week 2)

Priority: CRITICAL — Core business value

ApiToApiConnectorModule.java    # Fetch API → schema map → POST API
                                 # Batch processing, error handling

# Estimated: 600 LOC, 2 days

PHASE 4: Aggregation (Week 2-3)

Priority: HIGH — Analytics/reporting

GroupByModule.java          # Grouping + aggregation
AggregationModule.java      # Multi-source combine
TimeSeriesAggregationModule.java # Bucketing + aggregate

# Estimated: 600 LOC, 2 days

PHASE 5: Advanced Connectors (Week 3)

Priority: MEDIUM — Enterprise features

SqlToDatabaseConnectorModule.java
DatabasePollerModule.java
WebhookToApiConnectorModule.java
GraphQlDataFederationModule.java
ChangeDataCaptureModule.java

# Estimated: 1,500 LOC, 3 days

PHASE 6: Control Flow (Week 3-4)

Priority: MEDIUM — Orchestration

ConditionalBranchModule.java
ParallelExecutorModule.java
LoopModule.java
RetryModule.java

# Estimated: 800 LOC, 2 days

PHASE 7: Quality & Ops (Week 4)

Priority: LOWER — Nice-to-have

DataValidationModule.java
DataCleaningModule.java
DuplicateDetectionModule.java

# Estimated: 500 LOC, 2 days

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📋 NEXT STEPS (Choose Your Adventure)

OPTION A: Build Foundation Now (Recommended)

# 1. Create 3 priority modules
valkyrai/src/main/java/com/valkyrlabs/workflow/modules/transform/
├─ MapModule.java ← Start here
├─ FilterModule.java
└─ SortModule.java

# 2. Add REST endpoints
POST /v1/workflow                  # Create
GET /v1/workflow/{id}              # Fetch
POST /v1/workflow/{id}/trigger     # Execute
GET /v1/workflow/{id}/status       # Poll
GET /v1/execModule/schemas         # Catalog to frontend

# 3. Test locally
mvn clean install
make harness-up
# Test workflow creation + module execution

# Est. Time: 4-5 days

OPTION B: Focus on API Bridge (Business Value)

# Go straight to ApiToApiConnectorModule
# + SchemaMapperModule dependency
# + MapModule for basic transforms

# This unlocks: multi-source ETL, workflow automation,
# cross-API data sync, real business value

# Est. Time: 3-4 days

OPTION C: Full Build Sprint

# Build all 31 backend modules + full REST API
# + comprehensive tests + documentation

# Est. Time: 3-4 weeks (full-time)

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💡 KEY ARCHITECTURAL INSIGHTS

1. State Threading

Data flows through WorkflowState (Map<String, Object>):

REST Call → Extract items → Map transform → Filter → Sort → Post to API
   ↓            ↓              ↓             ↓       ↓       ↓
WorkflowState updated at each step; each module reads previous output

2. Cross-API Magic

// Frontend: User drags modules together
Task → [RestModule] → [SchemaMapperModule] → [ApiToApiConnectorModule]

// Backend execution:
1. RestModule fetches user data from API A
2. SchemaMapperModule transforms User → Customer schema
3. ApiToApiConnectorModule POSTs to API B
4. Result merged into WorkflowState

3. Error Resilience

// NEVER throw; always return error map
try {
    // Do work
    return Map.of("status", "success", "data", result);
} catch (Exception e) {
    logger.error("Module failed", e);
    return Map.of("status", "error", "error", e.getMessage());
    // Workflow continues or handles gracefully
}

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📝 DEFINITION OF DONE

Each module implementation MUST:

• ✅ Extend VModule (Reactive pattern)
• ✅ Implement executeReactive(Workflow, Task, ExecModule)
• ✅ Use VModule.config() helper (JsonNode)
• ✅ Extract input via JSONPath
• ✅ Return error map on exception (never throw)
• ✅ Call recordEvent(eventLog) for progress
• ✅ Return Flux<EventLog> for streaming
• ✅ Include unit tests (mock inputs)
• ✅ Include integration tests (full workflow)
• ✅ Document with JavaDoc + examples

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🎬 EXAMPLE: MapModule Implementation

@Component("mapModule")
public class MapModule extends VModule {

    @Override
    public Flux<EventLog> executeReactive(Workflow wf, Task task, ExecModule module) {
        try {
            JsonNode cfg = config();
            String sourcePath = cfg.get("source_path").asText();
            String outputField = cfg.get("output_field").asText("mapped_items");

            // Extract source array from workflow state
            List<?> items = extractArray(sourcePath);

            // Map each item
            List<Map<String, Object>> mapped = new ArrayList<>();
            for (Object item : items) {
                Map<String, Object> result = mapItem((Map<String, Object>) item, cfg);
                mapped.add(result);
            }

            // Return success event
            EventLog event = new EventLog()
                .status(EventLog.StatusEnum.OK)
                .eventDetails("Mapped " + mapped.size() + " items");

            recordEvent(event);
            return Flux.just(event);

        } catch (Exception e) {
            logger.error("Map failed", e);
            EventLog error = new EventLog()
                .status(EventLog.StatusEnum.ERROR)
                .eventDetails(e.getMessage());
            recordEvent(error);
            return Flux.just(error);
        }
    }

    private Map<String, Object> mapItem(Map<String, Object> item, JsonNode cfg) {
        // Apply mappings from config
        // Return transformed object
    }
}

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🏆 CONCLUSION

Frontend: ✅ PRODUCTION READY

• 60+ modules fully defined & typed
• Forms, visualization, integration complete
• Ready for backend module implementations

Backend: 🚀 READY TO BUILD

• Architecture defined (VModule reactive pattern)
• Integration points clear (REST endpoints, WebSocket)
• Test patterns documented
• Estimated 6,200 LOC across 31 modules

Business Impact: 🎯 MASSIVE

• Enables N8N-like no-code automation
• Cross-API data pipelines
• ETL workflows
• Real-time analytics
• Multi-source aggregation

Next Move: Pick OPTION A (foundation), OPTION B (API bridge), or OPTION C (full build)
Then start implementing modules in priority order.

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Ready to build? 🔨