/**
 * BSO M9-4 — skillfm-guard → sidecar HTTP client
 *
 * Refs: docs/prd/PRD-BSO-M9-HARNESS-HOOKS.md §3.5
 *
 * hook 进程生命短（几十毫秒），对 sidecar 有严格的"秒级响应 + fail-open"要求：
 *   - 超时 (default 500ms) → 降级放行（exit 0）+ stderr warn
 *   - 网络错误 / sidecar 不在 → 降级放行
 *   - 仅在 sidecar 明确返回 412 时才阻断（exit 2）
 */
export interface SidecarEndpoint {
    url: string;
    port: number;
}
export declare function readSidecarEndpoint(): SidecarEndpoint | null;
export interface GuardCheckInput {
    session_id: string;
    tool?: string;
    harness?: string;
}
export interface GuardCheckResponse {
    status: number;
    body: unknown;
}
/**
 * GET /internal/guard/check — fail-open on any error
 */
export declare function callGuardCheck(endpoint: SidecarEndpoint, input: GuardCheckInput, timeoutMs?: number): Promise<GuardCheckResponse>;
/**
 * POST /internal/guard/session-start
 */
export declare function callGuardSessionStart(endpoint: SidecarEndpoint, payload: {
    session_id: string;
    harness?: string;
    cwd?: string;
}, timeoutMs?: number): Promise<GuardCheckResponse>;
/**
 * POST /internal/guard/post-tool-use
 */
export declare function callGuardPostToolUse(endpoint: SidecarEndpoint, payload: {
    session_id: string;
    tool?: string;
    harness?: string;
    outcome?: 'ok' | 'error';
}, timeoutMs?: number): Promise<GuardCheckResponse>;
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