Variable: ChartTypeSchema

const ChartTypeSchema: ZodUnion<readonly [ZodLiteral<"bar">, ZodLiteral<"horizontalBar">, ZodLiteral<"line">, ZodLiteral<"area">, ZodLiteral<"combo">, ZodLiteral<"waterfall">, ZodLiteral<"scatter">, ZodLiteral<"heatmap">, ZodLiteral<"radar">, ZodLiteral<"pie">, ZodLiteral<"funnel">, ZodLiteral<"treemap">, ZodLiteral<"custom">]>

Allowed chart types the planner can pick. Defined as a discriminated literal union so each variant carries its own .describe() clause - the server-side planner’s prompt formatter walks .options to inline the descriptions into the model instructions, keeping the prompt in lock-step with the schema by construction. The runtime type is the plain string union ("bar" | "line" | ...), so consumers that just need a discriminator value behave the same as if it were a z.enum([...]).