/**
 * Isolation Module
 *
 * Handles project isolation checks to prevent noisy neighbor issues.
 * Manages circuit breakers and concurrency limits per project.
 *
 * @module server/runtime-handler/isolation
 */
import { type IsolationCheckResult, projectIsolation } from "./project-isolation.js";
export type { IsolationCheckResult } from "./project-isolation.js";
/**
 * Injection interface for testing isolation dependencies
 */
interface IsolationDeps {
    checkRequest?: typeof projectIsolation.checkRequest;
    startRequest?: typeof projectIsolation.startRequest;
    completeRequest?: typeof projectIsolation.completeRequest;
    recordTimeout?: typeof projectIsolation.recordTimeout;
}
/**
 * Inject dependencies for testing. Pass null to reset to defaults.
 */
export declare function __injectDepsForTests(deps: IsolationDeps | null): void;
/**
 * Check if a request is allowed to proceed based on isolation rules.
 */
export declare function checkRequestIsolation(projectSlug: string | undefined, shouldCheck: boolean): IsolationCheckResult;
/**
 * Start tracking an isolated request.
 * Call this after checkRequestIsolation returns allowed: true.
 */
export declare function startIsolatedRequest(projectSlug: string | undefined, shouldCheck: boolean): void;
/**
 * Complete an isolated request.
 * Updates circuit breaker state based on timeout status.
 */
export declare function completeIsolatedRequest(projectSlug: string | undefined, shouldCheck: boolean, isTimeout: boolean): void;
/**
 * Record timeout state immediately, then release concurrency when work settles.
 *
 * A handler may ignore cancellation forever. Waiting for settlement before
 * recording the timeout would prevent the circuit breaker from seeing the
 * failure, while releasing the slot immediately would undercount live work.
 */
export declare function completeIsolatedRequestOnSettlement(projectSlug: string | undefined, shouldCheck: boolean, isTimeout: boolean, settled: Promise<void>): void;
/**
 * Create a 503 Service Unavailable response for isolation rejection.
 */
export declare function createIsolationErrorResponse(check: IsolationCheckResult): Response;
export { projectIsolation } from "./project-isolation.js";
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