import type { ExtensionContext, SessionEntry, SessionMessageEntry } from "@earendil-works/pi-coding-agent";
import { type CompressionCore, type CompressionState, type Config } from "acp-kernel";
import { type AdapterConfig } from "./config.js";
import { entriesToCoreMessages } from "./messages.js";
import { SessionStateStore } from "./state.js";
type AgentMessage = SessionMessageEntry["message"];
export declare function readContextEntries(sm: ExtensionContext["sessionManager"]): SessionEntry[];
export declare function isPiHost(sm: ExtensionContext["sessionManager"]): boolean;
export interface AcpRuntime {
    core: CompressionCore;
    store: SessionStateStore;
    adapter: AdapterConfig;
    setAdapter(adapter: AdapterConfig): void;
    /** Record that a nudge was already shown for the turn keyed by last user msg
     *  id, so a tier/growth nudge prints at most once per turn instead of on
     *  every context event (pi fires multiple per assistant reply). */
    markNudgeShown(turnKey: string): void;
    nudgeShownFor(turnKey: string): boolean;
    /** Clear per-turn nudge tracking. Called on session_start so the Set does not
     *  grow unbounded across sessions in a long-lived Pi process. */
    clearNudgeTracking(): void;
    liveContextLimit(ctx: ExtensionContext): number;
    configFor(ctx: ExtensionContext): Config;
    stateFor(ctx: ExtensionContext, liveMessages?: AgentMessage[]): Promise<{
        state: CompressionState;
        coreMessages: ReturnType<typeof entriesToCoreMessages>;
        entries: SessionEntry[];
    }>;
    save(state: CompressionState, ctx: ExtensionContext): Promise<void>;
    acquireLock(sid: string): Promise<() => void>;
    /** One-shot directive injected into the next context rebuild (manual
     *  /acp-compact, /acp-snap text fallback). Consumed by the context transform. */
    pendingDirective: {
        text: string;
    } | null;
    /** Timestamp of the last context event (idle-snap baseline). */
    lastActivity: number;
    /** Last observed usage snapshot + session file (idle-snap inputs). */
    lastUsage: {
        tokens: number;
        limit: number;
    } | null;
    lastSessionFile: string | null;
    /** Vision capability of the model seen on the last context event. */
    lastModelVision: boolean;
}
export declare function createRuntime(adapter: AdapterConfig): AcpRuntime;
export {};