import { RenderProfile, ReactiveGraph, LoadProfile, FpsSample } from '../types.js';
export type IssueKind = 'slow-component-render' | 'over-rendered-component' | 'slow-load' | 'fps-drop' | 'effect-overconnected' | 'derived-orphan';
export interface PerformanceIssue {
    id: string;
    kind: IssueKind;
    severity: 'low' | 'medium' | 'high';
    summary: string;
    file?: string;
    line?: number;
    metric: Record<string, number>;
    /** Tool that returns more detail for this issue. */
    suggestedTool: string;
}
export interface IssueThresholds {
    /** Per-render time (ms) above which a component render is considered slow. */
    avgRenderTimeMs?: number;
    /** Render count above which a component is considered over-rendered. */
    renderCount?: number;
    /** Load duration (ms) above which a SvelteKit load is slow. */
    loadDurationMs?: number;
    /** FPS below which we record a drop. */
    fpsDropThreshold?: number;
    /** Outgoing edge count from an effect above which it is over-connected. */
    effectMaxDeps?: number;
}
export interface IssueInputs {
    renderProfiles: RenderProfile[];
    reactiveGraph: ReactiveGraph;
    loadProfiles: LoadProfile[];
    fpsSamples: FpsSample[];
}
export declare function listPerformanceIssues(inputs: IssueInputs, thresholds?: IssueThresholds): PerformanceIssue[];
export interface ReactiveProblems {
    effects: Array<{
        id: string;
        name: string;
        file: string;
        depCount: number;
    }>;
    orphanDeriveds: Array<{
        id: string;
        name: string;
        file: string;
    }>;
    isolatedNodes: Array<{
        id: string;
        name: string;
        type: string;
        file: string;
    }>;
}
export declare function summarizeReactiveProblems(graph: ReactiveGraph, t?: IssueThresholds): ReactiveProblems;