/**
 * Schemas for the type:"chart" PI tool route (v0.2 slice 3).
 *
 * Four chart types ship in slice 3 — they cover ~90% of typical chart
 * requests. The other 5 (area, scatter, radar, funnel, bubble) land as
 * patch-series extensions; new entries plug into ChartContent's
 * discriminated union.
 *
 * The TS schema mirrors the existing JSON schemas in
 * skills/lumen-chart/schemas/ (used as LLM-authoring guidance for the
 * non-PI path) but stays narrow to what each renderer actually consumes.
 *
 * Style matches src/templates/diagram/schemas.ts (Reflect.get + manual
 * guards, asArray narrows items to object).
 */
export interface DataPoint {
    label: string;
    value: number;
    /** Optional inline tooltip (rendered on the SVG mark via <title>). */
    tip?: string;
}
export interface BarSeries {
    name: string;
    data: DataPoint[];
    /** 6-digit hex color override (#RRGGBB) for bars in this series. */
    color?: string;
}
export interface BarContent {
    chart: "bar";
    series: BarSeries[];
    subtitle?: string;
    /** "grouped" (bars side-by-side) or "stacked" (cumulative). Default "grouped". */
    variant?: "grouped" | "stacked";
    xAxisLabel?: string;
    yAxisLabel?: string;
    /** Skip the legend entirely. Default false. */
    hideLegend?: boolean;
}
export interface PieSlice {
    label: string;
    value: number;
    /** 6-digit hex color override (#RRGGBB). */
    color?: string;
}
export interface PieContent {
    chart: "pie";
    slices: PieSlice[];
    subtitle?: string;
    /** Donut variant inner radius as fraction of outer (0.5–0.65 recommended). 0 = full pie. */
    innerRadius?: number;
}
export interface LineSeries {
    name: string;
    data: DataPoint[];
    color?: string;
}
export interface LineContent {
    chart: "line";
    series: LineSeries[];
    subtitle?: string;
    /** Curve type. Default "linear". */
    curve?: "linear" | "smooth";
    /** Show point markers. Default true. */
    showMarks?: boolean;
    xAxisLabel?: string;
    yAxisLabel?: string;
    hideLegend?: boolean;
}
export interface TableColumn {
    key: string;
    label: string;
    /** Cell type — drives alignment + formatting. */
    type?: "text" | "number" | "verdict";
    /** Highlight the min/max numeric cell in this column. Default false. */
    highlight?: boolean;
}
export type TableRow = Record<string, string | number>;
export interface TableContent {
    chart: "table";
    subtitle?: string;
    columns: TableColumn[];
    rows: TableRow[];
}
/** Interactive bar chart rendered via Chart.js (HTML/Canvas, not SVG). */
export interface InteractiveBarContent {
    chart: "interactive-bar";
    series: BarSeries[];
    subtitle?: string;
    /** "grouped" (bars side-by-side) or "stacked" (cumulative). Default "grouped". */
    variant?: "grouped" | "stacked";
    xAxisLabel?: string;
    yAxisLabel?: string;
    /** Skip the legend entirely. Default false. */
    hideLegend?: boolean;
}
/** Interactive line chart rendered via Chart.js (HTML/Canvas, not SVG). */
export interface InteractiveLineContent {
    chart: "interactive-line";
    series: LineSeries[];
    subtitle?: string;
    /** Curve type. Default "linear". */
    curve?: "linear" | "smooth";
    /** Show point markers. Default true. */
    showMarks?: boolean;
    xAxisLabel?: string;
    yAxisLabel?: string;
    /** Skip the legend entirely. Default false. */
    hideLegend?: boolean;
}
export type ChartContent = BarContent | PieContent | LineContent | TableContent | InteractiveBarContent | InteractiveLineContent;
export declare const SUPPORTED_CHARTS: readonly ["bar", "pie", "line", "table", "interactive-bar", "interactive-line"];
export type SupportedChart = (typeof SUPPORTED_CHARTS)[number];
/**
 * Validate + normalize an untrusted `content` object from the PI tool param.
 * Throws Error with a precise path on any structural problem.
 */
export declare function parseChartContent(raw: unknown): ChartContent;
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