codeant-ai-for-open-source[bot] commented on PR #38403:
URL: https://github.com/apache/superset/pull/38403#issuecomment-4033756424
## **Sequence Diagram**
This diagram shows how the MCP service validates and maps a Big Number chart
request into Superset form_data, including resolving whether to render a
standalone number or a number with trendline.
```mermaid
sequenceDiagram
participant Client
participant MCPService
participant SchemaValidator
participant ChartModel
participant ChartMapper
participant SupersetBackend
Client->>MCPService: generate_chart with config (chart_type big_number)
MCPService->>SchemaValidator: Pre-validate chart_type and big number
fields
SchemaValidator-->>MCPService: Pre-validation success (big_number
allowed)
MCPService->>ChartModel: Parse into BigNumberChartConfig
ChartModel-->>MCPService: Validated BigNumberChartConfig
MCPService->>ChartMapper: map_config_to_form_data(BigNumberChartConfig)
ChartMapper->>ChartMapper: map_big_number_config and resolve viz_type
ChartMapper-->>MCPService: Superset form_data (big_number or
big_number_total)
MCPService->>SupersetBackend: Create or explore chart with form_data
SupersetBackend-->>Client: Chart link or result for Big Number display
```
---
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