import type { CoreServerSetupDeps } from "./core-capabilities.js";
import type { ExternalActionSource } from "./extension-api.js";
/** @internal */
export interface FileExternalInput {
    /** @internal */
    path: string;
    /** @internal */
    pollInterval: string;
    /** @internal */
    consume: "delete" | "keep";
}
/** @internal */
export declare function defineFileExternalSource(input: FileExternalInput, metadata: Pick<ExternalActionSource, "kind" | "label" | "description" | "inputMode">): ExternalActionSource;
/** A missing file is distinct from an empty presence trigger. @internal */
export declare function readTriggerFile(filePath: string): Promise<string | null>;
/** @internal */
export declare function consumeTriggerFile(filePath: string): Promise<void>;
/** Poll extension-owned file sources, consuming triggers only after successful admission. @internal */
export declare function createFileExternalSourceProvider(deps: CoreServerSetupDeps, options: {
    /** @internal */
    id: string;
    /** @internal */
    kind: string;
    /** @internal */
    inputMode: "none" | "instruction";
    /** @internal */
    aliases?: Partial<Record<string, string>>;
}): {
    /** @public */
    poll(): Promise<import("@leitwerk-dev/watcher-utils").PollResult>;
};
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