majiayu000 UX Sequence Diagram
A skill that visualizes interaction sequences and system communications as ASCII diagrams.
When to Use
- Defining user-system interaction sequences
- Documenting API call sequences
- Representing event flows between components
- Designing asynchronous operation sequences
Sequence Diagram Symbols
Participants
┌───────┐ ┌───────┐ ┌───────┐
│ User │ │ UI │ │Server │
└───┬───┘ └───┬───┘ └───┬───┘
│ │ │
Message Types
────────→ Sync Request
← ─ ─ ─ ─ Sync Response
- - - - → Async Request
═══════→ Critical Message
──────X Failed/Cancelled
Sequence Patterns
Basic Request-Response
┌───────┐ ┌───────┐ ┌───────┐
│ User │ │ UI │ │Server │
└───┬───┘ └───┬───┘ └───┬───┘
│ │ │
│ Click Button │ │
│─────────────────→│ │
│ │ API Request │
│ │─────────────────→│
│ │ Response Data │
│ │← ─ ─ ─ ─ ─ ─ ─ ─ │
│ Update View │ │
│← ─ ─ ─ ─ ─ ─ ─ ─ │ │
↓ ↓ ↓
Constraints
- Participants arranged left-to-right, closest to user first
- Time flows top-to-bottom
- Clearly distinguish sync/async messages