import type { ChatMessage, ProviderId, ToolDefinition } from "../../types.js";
import type { resolveToolDialect } from "../../llm/capabilities.js";
export interface CompactionAdmissionPorts {
    readonly messages: readonly ChatMessage[];
    readonly provider: ProviderId;
    readonly model: string;
    readonly dialect: ReturnType<typeof resolveToolDialect>;
    readonly keepRecent: number;
    readonly contextLimitTokens: number | undefined;
    readonly estimateRequestTokens: (messages: readonly ChatMessage[]) => number;
    readonly selectTools: () => readonly ToolDefinition[] | undefined;
    readonly buildDurableEnvelope: () => Promise<string | undefined>;
    readonly isSuppressed: (attemptKey: string) => boolean;
    readonly isExhausted?: ((attemptKey: string) => boolean) | undefined;
}
export type CompactionAdmission = {
    readonly admitted: false;
} | {
    readonly admitted: true;
    readonly beforeTokens: number;
    readonly compactTrigger: number;
    readonly durableEnvelope: string | undefined;
    readonly attemptKey: string;
};
export interface CompactionAdmissionOptions {
    readonly bypassThreshold?: boolean | undefined;
    readonly retrySuppressed?: boolean | undefined;
}
export declare const planCompactionAdmission: (ports: CompactionAdmissionPorts, options?: CompactionAdmissionOptions) => Promise<CompactionAdmission>;