codeant-ai-for-open-source[bot] commented on PR #38402:
URL: https://github.com/apache/superset/pull/38402#issuecomment-4054187382
## **Sequence Diagram**
This PR adds a new handlebars chart type to MCP chart generation. The flow
now validates handlebars-specific fields early, parses the new schema, and maps
either aggregate or raw query mode into Superset form data before chart
creation.
```mermaid
sequenceDiagram
participant Client
participant MCPValidator
participant ChartSchema
participant ChartMapper
participant SupersetBackend
Client->>MCPValidator: Send generate chart request with chart type
handlebars
MCPValidator->>MCPValidator: Pre validate template and query mode
requirements
MCPValidator->>ChartSchema: Validate request against
HandlebarsChartConfig
ChartSchema-->>MCPValidator: Return validated config
MCPValidator->>ChartMapper: Map config to form data for handlebars viz
type
ChartMapper->>SupersetBackend: Create chart or explore payload
SupersetBackend-->>Client: Return chart result or explore link
```
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