import type { MergedConfig } from "./config-layer.js";
export type { MergedConfig } from "./config-layer.js";
export type ResolveSource = "L4-inline" | "L4-name" | "L3" | "L2" | "L1" | "default" | "inherit";
export type LookupSource = "L3" | "L2" | "L1" | "default" | "missing";
export interface ResolveResult {
    model: {
        provider: string;
        model: string;
    } | undefined;
    source: ResolveSource;
}
export interface LookupResult {
    model: {
        provider: string;
        model: string;
    } | undefined;
    source: LookupSource;
}
/**
 * Look up a persona-model name through L3 → L2 → L1 → default → missing.
 * Used by resolveModelForPhase for L4-name resolution and direct persona lookups.
 */
export declare function lookupPersonaModel(personaName: string, pipelineName: string, merged: MergedConfig): LookupResult;
/**
 * Resolve the {provider, model} pair for a specific phase invocation.
 *
 * Cascade order:
 *   L4-inline → L4-name → L3 → L2 → L1 → default persona-model → inherit
 *
 * When source is "inherit", model is undefined — caller must skip setModel.
 */
export declare function resolveModelForPhase(pipelineName: string, phaseRole: string, personaNoun: string, merged: MergedConfig): ResolveResult;