import type { ExtensionAPI, ExtensionUIContext, ModelRegistry } from "@earendil-works/pi-coding-agent";
import type { HostAdapter, NudgeCapability } from "#src/host/adapter";
/**
 * Pi implementation of `HostAdapter` (ADR 0001). The sole production
 * adapter — see `test/host-import-boundary.test.ts` for the enforced
 * confinement of `@earendil-works/*` imports to this directory.
 */
export declare class PiHostAdapter implements HostAdapter {
    readonly nudgeCapability: NudgeCapability;
    readonly configDir: string;
    private readonly pi;
    /**
     * Set once `session_start` fires and pi hands us an `ExtensionUIContext`.
     * `ExtensionAPI` itself exposes no UI surface, so `notify()` before that
     * point falls back to the debug log rather than throwing.
     */
    private ui?;
    /**
     * Parent pi `ModelRegistry`, bound at `session_start` (same lifecycle as
     * `ui`). Backs {@link lookupContextWindow}; absent → `undefined` (fallback).
     */
    private modelRegistry?;
    constructor(pi: ExtensionAPI, configDir?: string);
    /** Bind the UI context obtained at `session_start` — enables `notify()`. */
    setUi(ui: ExtensionUIContext): void;
    /** Bind the model registry obtained at `session_start`. */
    setModelRegistry(registry: ModelRegistry): void;
    notifyParent(text: string): Promise<void>;
    notify(message: string, level?: "info" | "warn" | "error"): void;
    /**
     * Resolve a model's real context window from the parent registry. Prefers an
     * exact `find(provider, model)` when both ids are present; with only a model
     * id, falls back to the first exact id match in `getAll()` (ambiguous across
     * providers — provider+model is preferred). Any miss, non-positive window,
     * or registry error yields `undefined` — never throws into the spawn path.
     */
    lookupContextWindow(provider: string | undefined, model: string | undefined): number | undefined;
}
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