/**
 * Counts `[graph-write] reject` lines across the ledger MCP tee logs modified
 * within the trailing 24 hours.
 *
 * Uses file mtime rather than parsing per-line timestamps: the tee log carries
 * no timestamp of its own, and a file untouched for a day cannot hold a reject
 * from the last one. Best-effort — an unreadable log directory yields 0 rather
 * than throwing, because a census that dies on a missing directory tells the
 * operator nothing at all.
 */
export declare function countWriteRejects24h(logDir: string, now: number): number;
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