/**
 * Reading a Pi session file into the canonical vocabulary.
 *
 * Two rules decide everything here:
 * - no result body crosses (FR-24). A tool result becomes one outcome line (FR-23, FR-25);
 * - nothing is guessed. An entry type this adapter does not know is skipped and counted,
 *   and an unparsable line makes the whole file unreadable rather than shorter.
 */
import type { CanonicalTurn } from "./contract.js";
import { type PiEntry, type PiSessionHeader } from "./format.js";
export interface ParsedSessionFile {
    header: PiSessionHeader | null;
    entries: PiEntry[];
    /** True when a line was not JSON: the file was cut, or written by something else. */
    truncated: boolean;
}
export interface LoadedTurns {
    turns: CanonicalTurn[];
    /** Entry types this adapter does not know. Visible so the preview can warn (T-PI-14). */
    skippedEntryTypes: string[];
    skippedCount: number;
    /** Set when the append-only entry graph cannot produce one trustworthy active branch. */
    unreadable: string | null;
}
export interface ResolvedPiEntries {
    /** The active leaf's complete parent chain, before compaction is applied. */
    activePath: PiEntry[];
    /** The entries Pi would put in model context after applying its latest compaction. */
    contextEntries: PiEntry[];
    unreadable: string | null;
}
export declare function parseSessionText(text: string): ParsedSessionFile;
/** Resolve Pi's active leaf and reproduce its compaction-aware context projection. */
export declare function resolveActiveEntries(entries: PiEntry[]): ResolvedPiEntries;
export declare function entriesToTurns(entries: PiEntry[]): LoadedTurns;
/** Short human title: the session's own name, else its first user message. */
export declare function titleFromEntries(entries: PiEntry[]): string | null;
/** Files named by raw Pi tool inputs, before canonical credential redaction. */
export declare function changedPathsFromEntries(entries: PiEntry[]): string[];
/** The last timestamp the file recorded, ISO-8601 UTC, or null. */
export declare function lastTimestamp(entries: PiEntry[]): string | null;