/**
 * Project continuity completeness check for session tracker.
 *
 * Ensures project-continuity.json contains ALL known sessions by walking
 * the session-tracker directory tree. Extracted from index.ts to satisfy
 * the ≤500 LOC gate (GA-4).
 *
 * @module session-tracker/project-continuity
 */
import type { ProjectIndexWriter } from "./persistence/project-index-writer.js";
/**
 * Dependencies injected by SessionTracker for project continuity operations.
 */
export interface ProjectContinuityDeps {
    /** Project index writer for addSession calls. */
    projectIndexWriter: ProjectIndexWriter;
    /** Absolute path to the project root. */
    projectRoot: string;
}
/**
 * Ensures project-continuity.json contains ALL known sessions.
 *
 * Walks the session-tracker directory tree and checks that every session
 * (main .md files AND child .json files) is registered in the project index.
 * Missing entries are added. This fixes CP-ST-02's AC-08 requirement.
 *
 * Best-effort: individual failures are silently skipped.
 *
 * Usage:
 * ```typescript
 * const checker = new ProjectContinuityChecker({ projectIndexWriter, projectRoot })
 * await checker.ensureCompleteness()
 * ```
 */
export declare class ProjectContinuityChecker {
    private readonly projectIndexWriter;
    private readonly projectRoot;
    /**
     * @param deps - Injected dependencies.
     */
    constructor(deps: ProjectContinuityDeps);
    /**
     * Walks the session-tracker directory and registers any missing sessions.
     *
     * For each valid session directory:
     * 1. Registers the main session if not already in the index.
     * 2. Scans for child `.json` files and registers each child session.
     *
     * Silently skips invalid or unreadable entries.
     */
    ensureCompleteness(): Promise<void>;
}
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