/**
 * The system prompt, assembled per turn.
 *
 * It lives in the umbrella because the umbrella is what knows the brief, the
 * catalog and the knowledge index. It rides the turn (`Turn.system`), so every
 * harness — the default one, a host's own — thinks on the same brief.
 */
import { type Guard, type Harness, type RunContext } from "./core/index.js";
/**
 * Which discovery rail a turn's harness actually carries — ONE derivation, for
 * every path that assembles a brief.
 *
 * It was written four times and three of them were a hardcoded `false`. The away
 * automation run and the delegated run mount the composed `vendo()`, so they
 * carry `find_tools` like any chat turn — and were told they carried nothing.
 * Maple, 2026-08-19: an automation whose whole job was "check the balance and
 * text me" read the balance and then said it had no way to send a text, because
 * the belt had evicted `vendo_text_me` and the brief never mentioned the search
 * that would have found it again. A rail nobody names is a rail nobody uses.
 */
export declare const discoveryRail: (harness: Pick<Harness, "toolSurface">, connectorDiscovery: boolean | undefined) => "find-tools" | "connectors" | false;
/** 03-agent §3: company directions are mandatory policy context and fail closed. */
export declare function assembleSystemPrompt(guard: Guard, ctx: RunContext, system?: {
    product?: string | (() => string | undefined);
    theme?: string;
    knowledge?: string | (() => string | undefined | Promise<string | undefined>);
    instructions?: string;
}, capabilityMiss?: boolean, discovery?: "find-tools" | "connectors" | false): Promise<string>;