import type { IncomingMessage, ServerResponse } from "node:http";
import type { Config } from "../config.js";
import { type OpenAiFrontProtocol } from "../backend.js";
import type { ToolUseValidator } from "../validator.js";
import type { Reshaper } from "../reshaper.js";
import type { MetadataLogger } from "../log.js";
import type { CircuitBreaker } from "../circuit-breaker.js";
import { CredentialWalk } from "../credential-select.js";
import type { RequestAccountingState } from "../accounting-state.js";
import type { ResolvedAttempt } from "../resolved-attempt.js";
import type { ModelLimits } from "../catalog.js";
import { CredentialAttemptTrace, type CandidateRunnerHandlers, type StickyRequestContext } from "../candidate-runner.js";
export declare function detectOpenAiFrontProtocol(method: string | undefined, pathname: string): OpenAiFrontProtocol | null;
export interface OpenAiFrontHandlers extends CandidateRunnerHandlers {
    validator: ToolUseValidator;
    logger: MetadataLogger;
    breaker: CircuitBreaker;
    isDestructive: (name: string) => boolean;
    resolveReshaper: (attempt: ResolvedAttempt) => Reshaper | undefined;
    withRepairAccounting: (reshaper: Reshaper, accounting: RequestAccountingState | null) => Reshaper;
    catalog: {
        cachedLimits: (provider: string, model: string) => ModelLimits | null | undefined;
    };
}
export interface OpenAiFrontContext {
    reqJson: unknown;
    wantsStream: boolean;
    protocol: OpenAiFrontProtocol;
    inboundHeaders: IncomingMessage["headers"];
    started: number;
    path: string;
    hadTools: boolean;
    req?: IncomingMessage;
    addressedPool?: string | null;
    degradedSpecs?: Set<string> | null;
    sticky?: StickyRequestContext | null;
    cfg?: Config;
    accounting: RequestAccountingState | null;
    quotaDemotedFirst?: string | null;
    latencyDemotedFirst?: string | null;
    pacedFirst?: string | null;
    /**
     * The relay's own chars/4 estimate of this request's INPUT size (`estimateRequestTokens` in
     * `metadata.ts`) — the sibling of `AnthropicCtx`'s field in `routes/messages.ts`, threaded rather
     * than re-estimated so the hedge floor and the context guardrail read the same number.
     */
    estimatedInputTokens: number;
}
export declare function openAiFrontPath(res: ServerResponse, credentialWalk: CredentialWalk, credentialTrace: CredentialAttemptTrace, ctx: OpenAiFrontContext, h: OpenAiFrontHandlers): Promise<void>;