sequenceDiagram
    participant Executor as DAGExecutor
    participant LoopOrch as LoopOrchestrator
    participant ParallelOrch as ParallelOrchestrator
    participant Utils as SubflowUtils
    participant Logger as BlockLog/ContextExtensions

    Note over Executor: Execution Flow with Error Handling

    Executor->>LoopOrch: setContextExtensions()
    Executor->>ParallelOrch: setContextExtensions()
    
    alt Loop Initialization
        Executor->>LoopOrch: initializeLoopScope(ctx, loopId)
        LoopOrch->>LoopOrch: Get loop config
        
        alt ForEach Loop
            LoopOrch->>Utils: resolveArrayInput(items)
            Utils-->>LoopOrch: resolved items array
            LoopOrch->>Utils: validateMaxCount(items.length, MAX_FOREACH_ITEMS)
            alt Validation Fails
                Utils-->>LoopOrch: error message
                LoopOrch->>Utils: addSubflowErrorLog(ctx, loopId, error)
                Utils->>Logger: Create BlockLog with error
                Utils->>Logger: Call onBlockComplete with error
                LoopOrch->>LoopOrch: Set validationError in scope
                LoopOrch-->>Executor: Throw Error
            else Validation Passes
                Utils-->>LoopOrch: undefined (no error)
                LoopOrch->>LoopOrch: Set scope.items and scope.item
            end
        end
        
        alt For/DoWhile Loop
            LoopOrch->>Utils: validateMaxCount(iterations, MAX_LOOP_ITERATIONS)
            alt Validation Fails
                Utils-->>LoopOrch: error message
                LoopOrch->>Utils: addSubflowErrorLog(ctx, loopId, error)
                Utils->>Logger: Create BlockLog with error
                LoopOrch-->>Executor: Throw Error
            end
        end
    end
    
    alt Parallel Initialization
        Executor->>ParallelOrch: initializeParallelScope(ctx, parallelId)
        ParallelOrch->>ParallelOrch: Get parallel config
        ParallelOrch->>Utils: resolveArrayInput(distribution)
        
        alt Resolution Fails
            Utils-->>ParallelOrch: Throw error
            ParallelOrch->>Utils: addSubflowErrorLog(ctx, parallelId, error)
            Utils->>Logger: Create BlockLog with error
            ParallelOrch->>ParallelOrch: setErrorScope with validationError
            ParallelOrch-->>Executor: Throw Error
        end
        
        ParallelOrch->>Utils: validateMaxCount(branchCount, MAX_PARALLEL_BRANCHES)
        alt Validation Fails
            Utils-->>ParallelOrch: error message
            ParallelOrch->>Utils: addSubflowErrorLog(ctx, parallelId, error)
            Utils->>Logger: Create BlockLog with error
            ParallelOrch->>ParallelOrch: setErrorScope with validationError
            ParallelOrch-->>Executor: Throw Error
        end
    end
    
    Note over Logger: Errors now propagate to console and dashboard