/**
 * Local mirror sidecar helpers.
 *
 * D062 envelope producers should write semantic payloads under
 * `_local.content`. Older producers and some direct integration callbacks
 * instead wrote sibling fields such as `_local.toolName`, `_local.args`,
 * `_local.result`, `_local.input`, and `_local.output`. Those fields are
 * still local-only evidence, so recall, trace, and summarize should not
 * drop them just because the producer used the older shape.
 */
export type LocalSidecarLike = object;
export declare function isLocalSidecarLike(value: unknown): value is LocalSidecarLike;
/**
 * Return the recall-readable content payload for a local sidecar.
 *
 * If `_local.content` exists, it wins. If not, derive the equivalent
 * content shape from known legacy fields. The returned value is still
 * local-only data. It is never part of the signed AtribRecord bytes.
 */
export declare function deriveLocalContentFromSidecar(eventTypeUri: string, local: unknown): unknown | undefined;
/**
 * Clone a local sidecar and populate `content` when it can be derived.
 * Consumers that need the full sidecar keep the original fields; consumers
 * that only know D062 `_local.content` get a stable shape.
 */
export declare function withDerivedLocalContent<T extends object>(eventTypeUri: string, local: T): T & {
    content?: unknown;
};
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