/**
 * Parser for the `x-chaos-fault-*` response headers emitted by
 * `@mizchi/server-faults` when its `metadataHeader` option is set.
 * Pure function: no I/O, no Playwright surface — invoked from
 * `page.on('response', …)` once per response.
 *
 * Wire-format mirror: this module deliberately re-states the
 * `FaultAttrs` shape from server-faults rather than importing it.
 * The HTTP header contract is the load-bearing interface; the type
 * is shared by convention only. If server-faults adds a kind, the
 * `KNOWN_KINDS` tuple below must be extended in lockstep.
 */
declare const KNOWN_KINDS: readonly ["5xx", "latency"];
export type ServerFaultKind = (typeof KNOWN_KINDS)[number];
export interface ServerFaultEventAttrs {
    kind: ServerFaultKind;
    path: string;
    method: string;
    /** HTTP status code (integral). Set when kind === "5xx". */
    targetStatus?: number;
    /** Sleep duration in milliseconds (may be fractional). Set when kind === "latency". */
    latencyMs?: number;
    traceId?: string;
}
export interface ParsedServerFault {
    attrs: ServerFaultEventAttrs;
    /**
     * Duplicated at top level for O(1) collector indexing; `attrs.traceId` is
     * for OTel-attribute parity at the FaultAttrs schema level.
     */
    traceId?: string;
}
export declare function parseServerFaultHeaders(headers: Headers, prefix: string): ParsedServerFault | null;
export {};
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