import type { ContextEvent, ExtensionAPI, ExtensionContext } from "@earendil-works/pi-coding-agent";
import { HeadroomHttpClient } from "./client.js";
import type { AgentMessage, HeadroomConfig, HeadroomStats } from "./types.js";
interface HeadroomRuntimeState {
    enabled: boolean;
    proxyOnline: boolean | null;
    proxyStarting: boolean;
    proxyStartAttempted: boolean;
    remoteWarningShown: boolean;
    offlineWarningShown: boolean;
    processing: boolean;
    lastInputFingerprint: string | null;
    lastOutputFingerprint: string | null;
    lastGuardSkipCandidateFingerprint: string | null;
    seenCandidateContentFingerprints?: Set<string>;
    seenCandidateContentOrder?: string[];
    lastCompressionTime: number;
    stats: HeadroomStats;
}
interface HeadroomRuntime {
    pi: ExtensionAPI;
    config: HeadroomConfig;
    client: HeadroomHttpClient;
    state: HeadroomRuntimeState;
    refreshStatus(ctx: ExtensionContext): void;
    updateHealth(ctx: ExtensionContext): Promise<boolean>;
    ensureProxy(ctx: ExtensionContext): Promise<boolean>;
}
export default function headroomExtension(pi: ExtensionAPI): void;
declare function handleContextCompression(runtime: HeadroomRuntime, event: ContextEvent, ctx: ExtensionContext): Promise<{
    messages?: AgentMessage[];
} | undefined>;
declare function generateFingerprint(messages: AgentMessage[]): string;
declare function isAbortOrTimeoutError(error: unknown): boolean;
declare function renderFooterStatus(ctx: ExtensionContext, config: HeadroomConfig, state: HeadroomRuntimeState): string;
export declare const __test__: {
    isAbortOrTimeoutError: typeof isAbortOrTimeoutError;
    renderFooterStatus: typeof renderFooterStatus;
    generateFingerprint: typeof generateFingerprint;
    handleContextCompression: typeof handleContextCompression;
};
export {};