export interface Blob {
    bytes: Uint8Array;
    mediaType: string;
}
/**
 * In-memory, content-addressed blob store for debug binary payloads. The debug
 * serializer offloads every `Uint8Array` here and emits a small pointer in the
 * event log instead of the bytes; the `DebugServer` serves them at `/blobs/:id`
 * on demand. Content addressing (sha1 of the bytes) deduplicates — a redraw loop
 * that emits the same image every turn stores it once.
 *
 * Bounded by a total-byte LRU so a long session of large payloads can't grow
 * without limit; evicted blobs 404 (the event log keeps the pointer + metadata,
 * so the UI still shows *what* it was). Both `put` and `get` refresh recency, so
 * a blob you're actively viewing stays resident.
 */
export declare class LruBlobStore {
    private readonly maxBytes;
    private readonly map;
    private totalBytes;
    constructor(maxBytes?: number);
    /** Store `bytes`, returning a stable content id. Idempotent for equal bytes. */
    put(bytes: Uint8Array, mediaType: string): string;
    get(id: string): Blob | undefined;
    private touch;
    private evict;
}
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