import { type SessionDestinationInput } from "../session/session-manager";
import { type PreparedSessionImport, type SessionImportCompleted, type SessionImportProviderId } from "./types";
/** Bumped when normalization/rendering changes; persisted in provenance. */
export declare const EXTERNAL_IMPORT_CONVERTER_VERSION = 1;
/** Persisted custom-entry type carrying import provenance (never enters LLM context). */
export declare const EXTERNAL_IMPORT_PROVENANCE_CUSTOM_TYPE = "session-import";
/** Persisted custom-message type carrying the reconstructed continuation context. */
export declare const EXTERNAL_IMPORT_CONTEXT_CUSTOM_TYPE = "session-import";
/** Hard source size limit; larger exports fail with `content_too_large`. */
export declare const EXTERNAL_IMPORT_SOURCE_MAX_BYTES: number;
export interface ExternalSessionImportRequest {
    /** Explicit user-selected transcript/export file. */
    sourcePath: string;
    /** Explicit provider; omitted = deterministic auto-detection. */
    provider?: SessionImportProviderId;
    /** Import-owner workspace (recorded as the new session's cwd). */
    cwd: string;
    /** Session destination; defaults to the workspace's managed session store. */
    destination?: SessionDestinationInput;
    /** Test seam for deterministic provenance timestamps. */
    now?: () => Date;
}
export interface SessionImportSourceIdentity {
    dev: bigint;
    ino: bigint;
    size: bigint;
    mtimeNs: bigint;
    ctimeNs: bigint;
}
/**
 * Phase 1: read, detect, parse, normalize, redact, and bound. Performs no
 * session mutation; safe to run before any session transition.
 */
export declare function prepareExternalSessionImport(request: Pick<ExternalSessionImportRequest, "sourcePath" | "provider"> & {
    expectedIdentity?: SessionImportSourceIdentity;
}): Promise<PreparedSessionImport>;
/**
 * Phase 2: materialize a prepared import as a NEW GJC session file and verify
 * it reopens as a resumable session. The caller's live session is untouched.
 */
export declare function materializeExternalSessionImport(prepared: PreparedSessionImport, options: Pick<ExternalSessionImportRequest, "cwd" | "destination" | "now">): Promise<SessionImportCompleted>;
/** Full import: prepare + materialize. Never switches the caller's session. */
export declare function importProviderSessionFile(request: ExternalSessionImportRequest): Promise<SessionImportCompleted>;
/** Human-facing summary lines for a completed import. */
export declare function formatProviderSessionImportSummary(result: SessionImportCompleted): string;
/** Human-facing diagnostic for a failed import. */
export declare function formatProviderSessionImportError(error: unknown): string;