sequenceDiagram
    participant User
    participant WorkflowImporter
    participant NormalizeSubblockValues
    participant RegenerateIds
    participant CredentialExtractor
    
    Note over User,CredentialExtractor: Import/Export Flow with Array Error Fix
    
    User->>WorkflowImporter: Import workflow JSON
    WorkflowImporter->>WorkflowImporter: Parse JSON content
    WorkflowImporter->>NormalizeSubblockValues: Normalize subblock values
    Note over NormalizeSubblockValues: Convert empty strings to null<br/>Prevents "Expected array, received string" errors
    NormalizeSubblockValues-->>WorkflowImporter: Return normalized blocks
    
    WorkflowImporter->>RegenerateIds: Regenerate IDs (if enabled)
    RegenerateIds->>RegenerateIds: Map old IDs to new IDs
    RegenerateIds->>RegenerateIds: Update blocks, edges, loops, parallels
    RegenerateIds-->>WorkflowImporter: Return workflow with new IDs
    
    WorkflowImporter-->>User: Import complete
    
    User->>CredentialExtractor: Export/Share workflow
    CredentialExtractor->>CredentialExtractor: Sanitize credentials
    Note over CredentialExtractor: Clear sensitive fields with null<br/>instead of empty strings
    CredentialExtractor->>CredentialExtractor: Clear OAuth credentials → null
    CredentialExtractor->>CredentialExtractor: Clear secret fields → null
    CredentialExtractor->>CredentialExtractor: Clear workspace-specific fields → null
    CredentialExtractor-->>User: Export sanitized workflow
    
    Note over User,CredentialExtractor: Removed Features (No longer in flow)
    Note over User,CredentialExtractor: ❌ GDrive tools (list/read/request access)
    Note over User,CredentialExtractor: ❌ Mermaid diagram generation
    Note over User,CredentialExtractor: ❌ Google Drive picker integration