/**
 * The request-body sugar: the one place the task's role-layer prompt inputs are read and turned into overlays of
 * the `task` source class. Three inputs, one expression each:
 *
 * - the role base — `TaskSpec.systemPrompt ?? resolvedRole.systemPrompt ?? internals.defaultSystemPrompt` (the
 *   task's own text, else the role preset the task named, else the persona a core spawner hands its child) — a
 *   `replace` of `core/role.base`, applied after the selector chose the role base's variant;
 * - the appended block — `TaskSpec.appendSystemPrompt` — an `add` to the `task-append` band (entry
 *   `core/role.append`);
 *
 * and nothing else reads them for assembly (`gate:sugar-single-site`). The sugar is applied first within its class,
 * the task-seat mods after it. Its one possible violation is locked text: a role-layer input carrying, verbatim,
 * the canonical text of a `constitution` entry is an already-assembled prompt, and the task is refused by name
 * (`prompt.assembled_role_refused`) — never passed through, never silently dropped.
 */
import { type SourcedOverlay } from "./overlay.js";
/** The task's role-layer prompt inputs, as prepare holds them. */
export interface SugarInputs {
    readonly spec: {
        readonly systemPrompt?: string;
        readonly appendSystemPrompt?: string;
    };
    readonly resolvedRole: {
        readonly systemPrompt?: string;
    };
    readonly internals?: {
        readonly defaultSystemPrompt?: string;
    };
}
/** The task-class overlays the request body carries, in application order (role base, then the appended block). */
export declare function sugarOverlays(inputs: SugarInputs): readonly SourcedOverlay[];