import type { OpenCodeClient } from "./opencode-client";
export interface ModelReference {
    providerID: string;
    modelID: string;
}
/** Identity comes only from the host's explicit message fields. */
export declare function sessionIDFor(messages: unknown[]): string | undefined;
/** Compaction can reorder history. Match the host's created-time/ID ordering. */
export declare function modelFor(messages: unknown[]): ModelReference | undefined;
/**
 * Resolve configured limits for this request, after the host has initialized
 * its provider service. The SDK wrapper is deliberate: missing/error response
 * data never falls back to a catalog or a previous request's model.
 * This budget reserves output but does not count later system/tool additions.
 */
export declare function inputBudgetFor(client: OpenCodeClient, reference: ModelReference, maximumOutput?: number): Promise<number | undefined>;
/** Ordinary dense writable arrays can be replaced elementwise without setters. */
export declare function canCommitMessages(value: unknown): value is unknown[];
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