/**
 * Validation Session Store
 *
 * SQLite persistence for validation_sessions, validation_metrics,
 * and agent_validation_state. Includes ALTER TABLE migration for
 * agent_activity (run_id, execution_status, trigger_reason).
 */
import type { SQLiteDatabase } from '../sqlite.js';
import { type CreateValidationSessionInput, type ValidationSessionRow, type SaveValidationMetricInput, type AgentValidationStateRow, type UpdateValidationStateInput, type ValidationSessionDetail, type ValidationTriggerType } from './types.js';
export declare function initValidationTables(db: SQLiteDatabase): void;
export declare function createValidationSession(db: SQLiteDatabase, input: CreateValidationSessionInput): ValidationSessionRow;
export declare function updateValidationSession(db: SQLiteDatabase, id: string, updates: Partial<Pick<CreateValidationSessionInput, 'execution_status' | 'validation_outcome' | 'summary' | 'recommendation' | 'after_snapshot_json' | 'report_json' | 'ended_at'>>): void;
export declare function saveValidationMetric(db: SQLiteDatabase, input: SaveValidationMetricInput): void;
export declare function getValidationSummary(db: SQLiteDatabase, agentId: string, triggerType?: ValidationTriggerType): ValidationSessionRow | null;
export declare function listValidationHistory(db: SQLiteDatabase, agentId: string, limit?: number, triggerType?: ValidationTriggerType): ValidationSessionRow[];
export declare function getValidationSessionDetail(db: SQLiteDatabase, sessionId: string): ValidationSessionDetail | null;
export declare function approveValidationSession(db: SQLiteDatabase, sessionId: string): void;
export declare function getAgentValidationState(db: SQLiteDatabase, agentId: string, triggerType: string): AgentValidationStateRow | null;
export declare function updateAgentValidationState(db: SQLiteDatabase, agentId: string, triggerType: string, input: UpdateValidationStateInput): void;
export declare function listStaleSessions(db: SQLiteDatabase, maxAgeMs: number): ValidationSessionRow[];
export declare function findBaseline(db: SQLiteDatabase, agentId: string, triggerType: string): {
    version: number;
    sessionId: string;
} | null;
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