import type { Employee, Session } from "./types.js";
/**
 * Resolve the effort level for a session.
 *
 * Valid effort levels come from the model registry (`validLevels`) for the
 * session's engine+model — NOT a hardcoded set — so e.g. codex's `xhigh`
 * validates and passes through instead of being silently dropped. Unknown or
 * unsupported levels are dropped with a logged warning (graceful degradation),
 * never a silent pass or a hard throw.
 *
 * For child sessions (has parentSessionId), resolution chain:
 *   1. config.engines.<engine>.childEffortOverride — global cost-control knob
 *   2. session.effortLevel — COO's per-task judgment (from API body)
 *   3. employee.effortLevel — employee YAML default
 *   4. config.engines.<engine>.effortLevel — engine fallback
 *
 * For non-child sessions, session.effortLevel wins when the user selected it in
 * the composer, then an assigned employee's default, then engine effortLevel.
 *
 * When the engine/model has no effort concept (validLevels empty, e.g.
 * Antigravity), returns the default without warnings — effort is just ignored.
 */
export declare function resolveEffort(engineConfig: {
    effortLevel?: string;
    childEffortOverride?: string;
}, session: Pick<Session, "parentSessionId" | "effortLevel">, employee: Pick<Employee, "effortLevel"> | null | undefined, validLevels: string[]): string;
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