/**
 * Model pricing and credit calculation helpers for the agent bridge.
 *
 * Extracted verbatim from `agent-bridge.ts`: the hardcoded per-model pricing
 * table (USD per 1M tokens), vendor-prefix stripping, backend-credit-rate
 * resolution and credit computation. Pure functions — no bridge state.
 */
import type { AllowedModel } from "../../relay/models-fetch.js";
/**
 * Strip vendor prefix to extract the bare model name.
 * e.g. "openai/gpt-5.3-codex" → "gpt-5.3-codex".
 * Returns the original string when no separator is present.
 */
export declare function bareModelId(modelId: string): string;
/** Get model cost from backend credit rates, falling back to hardcoded pricing table. */
export declare function getModelCost(m: AllowedModel): {
    input: number;
    output: number;
    cacheRead: number;
    cacheWrite: number;
};
/** Look up pricing for a modelId. Returns null when unknown. */
export declare function lookupPricing(modelId: string): {
    input: number;
    output: number;
    cacheWrite: number;
    cacheRead: number;
} | null;
/** Per-model credit rates (credits per 1M tokens), nullable when unset. */
export type CreditRates = {
    creditInputPer1M?: number | null;
    creditOutputPer1M?: number | null;
    creditCachedInputPer1M?: number | null;
    creditCacheReadPer1M?: number | null;
    creditCacheWritePer1M?: number | null;
};
/**
 * Resolve credit rates for a subagent result. Subagents may run a different
 * model than the parent — prefer the allowed-models entry matching the
 * subagent's modelId (exact, then bare-id); fall back to the parent's active
 * rates only when the model id is unknown — a known model without configured
 * credit rates yields null rates (0 credits).
 * Pure function — no bridge state.
 */
export declare function resolveCreditRatesForModel(modelId: string | undefined, allowedModels: readonly AllowedModel[] | undefined, fallbackRates: CreditRates | null): CreditRates | null;
/**
 * Calculate credits from token usage using per-model credit rates.
 *
 * NOTE: We intentionally keep higher precision here (no 2-decimal rounding)
 * so small turns don't collapse to 0.00 in live UI aggregation. Rendering
 * layers decide final display precision.
 */
export declare function calculateCredits(inputTokens: number, outputTokens: number, cacheReadTokens?: number, cacheWriteTokens?: number, creditInputPer1M?: number | null, creditOutputPer1M?: number | null, creditCachedInputPer1M?: number | null, creditCacheReadPer1M?: number | null, creditCacheWritePer1M?: number | null): number;
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