codeant-ai-for-open-source[bot] commented on PR #38725:
URL: https://github.com/apache/superset/pull/38725#issuecomment-4084275384
## **Sequence Diagram**
This PR adds a pre-validation step in XYChartConfig so LLM requests using
Superset-native field names are accepted instead of rejected by strict schema
rules. It preserves grouping behavior by mapping legacy groupby input and
silently dropping unsupported legacy fields.
```mermaid
sequenceDiagram
participant LLM
participant MCPService
participant XYChartConfig
LLM->>MCPService: Send generate chart request with native field names
MCPService->>XYChartConfig: Build and validate xy chart config
XYChartConfig->>XYChartConfig: Preprocess input before strict extra
field check
alt group_by missing and groupby provided
XYChartConfig->>XYChartConfig: Map first groupby value to group_by
else group_by already provided
XYChartConfig->>XYChartConfig: Keep explicit group_by value
end
XYChartConfig->>XYChartConfig: Remove adhoc_filters and order_desc
XYChartConfig-->>MCPService: Return normalized valid config
MCPService-->>LLM: Continue chart generation with intended grouping
```
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