import type { PressureDecision, PressureDetectionInput } from "./types.js";
/**
 * Detect the control-plane outcome for a pressure classification and
 * optional tool. Pure function — does not mutate runtime policy or
 * session state.
 *
 * Decision algorithm:
 *  1. Classify the pressure into a tier and band.
 *  2. If a known tool is supplied, prefer its per-band `pressureBehavior`
 *     mapping (the matrix is the authority).
 *  3. Otherwise fall back to a band default that is conservative for
 *     unknown / mutating / executing actions.
 *  4. Derive `severity`, `recommendedAction`, and (when divergent)
 *     `blockingRationale` per the Phase 57 contract.
 *
 * @param input - Pressure score/tier plus optional registered tool name.
 * @returns Pure control-plane decision with the contract payload.
 */
export declare function detectRuntimePressure(input?: PressureDetectionInput): PressureDecision;
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