/**
 * CR-SQLite compatible Sqlite client tag and type.
 *
 * This augments the base `@effect/sql` `SqlClient` with the SQLite-specific
 * ability to `loadExtension`, which CR-SQLite requires to activate its
 * functionality on a connection.
 *
 * Implementations are provided by platform drivers such as
 * `@effect/sql-sqlite-node` and `@effect/sql-sqlite-bun`, which already expose
 * a `loadExtension` method. This tag allows CR-SQLite helpers to depend on the
 * minimal capability needed across platforms.
 *
 * @since 0.1.0
 */
import * as SqlClient from "@effect/sql/SqlClient";
import type { SqlError } from "@effect/sql/SqlError";
import { Effect } from "effect";
import * as Context from "effect/Context";
import * as Layer from "effect/Layer";
/**
 * Extends the generic `SqlClient` with SQLite's `loadExtension` capability.
 *
 * @since 0.1.0
 */
export interface SqliteClient extends SqlClient.SqlClient {
    /**
     * Loads a SQLite extension from a full filesystem path.
     *
     * Required to enable CR-SQLite (crsqlite) for the current connection.
     */
    readonly loadExtension: (path: string) => Effect.Effect<void, SqlError>;
}
/**
 * Tag for a CR-SQLite compatible SQLite client.
 *
 * @since 0.1.0
 */
export declare const SqliteClient: Context.Tag<SqliteClient, SqliteClient>;
declare const SqliteClientError_base: new <A extends Record<string, any> = {}>(args: import("effect/Types").Equals<A, {}> extends true ? void : { readonly [P in keyof A as P extends "_tag" ? never : P]: A[P]; }) => import("effect/Cause").YieldableError & {
    readonly _tag: "SqliteClientError";
} & Readonly<A>;
/**
 * Error raised when a base `SqlClient` does not support `loadExtension`.
 *
 * @since 0.1.0
 */
export declare class SqliteClientError extends SqliteClientError_base<{
    cause: unknown;
}> {
}
/**
 * Loads a SQLite extension (e.g., CR‑SQLite) on the current connection.
 *
 * @since 0.1.0
 */
export declare const loadExtension: (path: string) => Effect.Effect<void, SqlError | SqliteClientError, SqlClient.SqlClient>;
/**
 * Validates a base `SqlClient` supports `loadExtension` and narrows it to `SqliteClient`.
 *
 * @since 0.1.0
 */
export declare const fromSqlClient: (sql: SqliteClient | SqlClient.SqlClient) => Effect.Effect<SqliteClient, SqliteClientError, never>;
/**
 * Provides a `SqliteClient` instance into the environment.
 *
 * @since 0.1.0
 */
export declare const layer: (sql: SqliteClient) => Layer.Layer<SqliteClient, never, never>;
/**
 * Lifts a base `SqlClient` into a `SqliteClient` if it exposes `loadExtension`.
 *
 * @since 0.1.0
 */
export declare const layerFromSqlClient: (sql: SqlClient.SqlClient | SqliteClient) => Layer.Layer<SqliteClient, SqliteClientError, never>;
export {};
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