/**
 * strategies/boundary-commit.ts
 *
 * Boundary commit, persists a compacted snapshot as a named checkpoint with
 * full lineage tracking for replay-safe session resumption.
 *
 * A boundary commit is always created after a successful compaction strategy
 * run (microcompact, collapse, autocompact, or reactive). It forms the
 * persistent anchor point that the resume-repair pipeline uses to restore
 * a session from a corrupted or partial state.
 *
 * Lineage is append-only: each commit appends its own checkpointId to the
 * parent's lineage array. This means any checkpoint can be sliced from any
 * earlier commit without re-ordering.
 */
import type { BoundaryCommit } from '../types.js';
import type { StrategyOutput } from '../types.js';
/**
 * Options for creating a boundary commit.
 */
export interface BoundaryCommitOptions {
    /** Session ID this commit belongs to. */
    sessionId: string;
    /** The compaction strategy output to commit. */
    strategyOutput: StrategyOutput;
    /** Parent boundary commit, or null for the first commit. */
    parent: BoundaryCommit | null;
    /** Estimated token count before compaction (for audit). */
    tokensBefore: number;
}
/**
 * Creates a new BoundaryCommit from a strategy output.
 *
 * The new commit's lineage is derived by appending its own checkpointId
 * to the parent's lineage (or starting a fresh lineage if `parent` is null).
 *
 * @param options - Commit options.
 * @returns A fully populated BoundaryCommit.
 */
export declare function createBoundaryCommit(options: BoundaryCommitOptions): BoundaryCommit;
/**
 * Validates a BoundaryCommit for replay-safety.
 *
 * A commit is replay-safe if:
 * - It has at least one message
 * - Its lineage is ordered and contains its own checkpointId
 * - Its tokenCount is positive
 *
 * @returns An array of validation error strings (empty = valid).
 */
export declare function validateBoundaryCommit(commit: BoundaryCommit): string[];
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