import type { EvoPaths } from "../paths.ts";
import type { ModelRunResult } from "./model-runner.ts";
declare const MODEL_USAGE_PHASES: readonly ["reflector", "research-plan", "builder", "evaluator", "adversarial-review", "report", "critic", "replay-old", "replay-candidate", "permit", "retrospective", "triage"];
export type ModelUsagePhase = (typeof MODEL_USAGE_PHASES)[number];
export interface ModelUsageTokens {
    input: number;
    output: number;
    cacheRead: number;
    cacheWrite: number;
    total: number;
}
export interface ModelUsageRecord {
    schemaVersion: 1;
    timestamp: string;
    phase: ModelUsagePhase;
    model: {
        provider: string;
        id: string;
    };
    sessionId: string;
    tokens: ModelUsageTokens;
    cost: number;
}
export interface ModelUsageTotals {
    runs: number;
    tokens: ModelUsageTokens;
    cost: number;
}
export interface ModelUsageSummary extends ModelUsageTotals {
    since: string;
    until: string;
    byPhase: Partial<Record<ModelUsagePhase, ModelUsageTotals>>;
}
export interface RecordModelUsageOptions {
    now?: () => Date;
}
export interface SummarizeModelUsageOptions {
    since: Date;
    until?: Date;
}
export declare function readModelUsageRecords(paths: EvoPaths): Promise<ModelUsageRecord[]>;
export declare function recordModelUsage(paths: EvoPaths, phase: ModelUsagePhase, run: ModelRunResult, options?: RecordModelUsageOptions): Promise<ModelUsageRecord>;
export declare function summarizeModelUsage(paths: EvoPaths, options: SummarizeModelUsageOptions): Promise<ModelUsageSummary>;
export declare function renderModelUsageSummary(summary: ModelUsageSummary): string;
export {};
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