/** One versioned text document loaded from a memory backend. */
export interface MemoryDocument {
    /** Complete UTF-8 document contents. */
    readonly content: string;
    /** Opaque backend version used for optimistic writes. */
    readonly version: string;
}
/** Input shared by document reads. */
export interface MemoryDocumentReadInput {
    /** Stable eve scope key for the authored memory slot. */
    readonly key: string;
    readonly signal: AbortSignal;
}
/** Input for a conditional document replacement. */
export interface MemoryDocumentWriteInput extends MemoryDocumentReadInput {
    readonly content: string;
    /** Version returned by {@link MemoryDocumentBackend.read}, or `null` for create-only. */
    readonly expectedVersion: string | null;
}
/**
 * Storage seam for one bounded memory file per eve scope key.
 *
 * Implementations may map the key to a KV entry, blob object, database row,
 * or another durable store. Writes must reject stale `expectedVersion` values
 * with {@link MemoryDocumentConflictError}.
 */
export interface MemoryDocumentBackend {
    readonly read: (input: MemoryDocumentReadInput) => Promise<MemoryDocument | null>;
    readonly write: (input: MemoryDocumentWriteInput) => Promise<MemoryDocument>;
}
/** Raised when a document changed between read and conditional write. */
export declare class MemoryDocumentConflictError extends Error {
    readonly key: string;
    constructor(key: string);
    /** Narrows conflicts across bundle and workflow boundaries. */
    static is(error: unknown): error is MemoryDocumentConflictError;
}