codeant-ai-for-open-source[bot] commented on PR #38403:
URL: https://github.com/apache/superset/pull/38403#issuecomment-4055412448
## **Sequence Diagram**
This PR adds end to end support for big number charts in MCP chart
generation, including request validation and form data mapping. The flow now
branches to create either a standalone big number total or a big number with
trendline based on trendline settings.
```mermaid
sequenceDiagram
participant Client
participant MCP Service
participant SchemaValidator
participant Chart Mapper
participant Superset Backend
Client->>MCP Service: Generate chart with chart type big_number
MCP Service->>SchemaValidator: Pre validate metric and trendline
requirements
SchemaValidator-->>MCP Service: Return validated config
MCP Service->>Chart Mapper: Map config to Superset form data
alt Trendline requested with temporal column
Chart Mapper->>Chart Mapper: Use viz type big_number with temporal
settings
else Number only
Chart Mapper->>Chart Mapper: Use viz type big_number_total
end
MCP Service->>Superset Backend: Create chart from mapped form data
Superset Backend-->>Client: Return chart result
```
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