/**
 * Builds a tool-call usage report from today's JSONL log file(s).
 *
 * Scans `<configDir>/logs/<today>*.jsonl` for entries with
 * `category === "tool_call"`, groups them by tool name, and produces a
 * Telegram-friendly plain-text report with bar charts, categories, deltas
 * vs. the previous invocation, and a Top-5 ranking.
 *
 * State (previous counts) is persisted to `<configDir>/.toolcall_state.json`
 * so each invocation can show change trends.
 */
/**
 * Build a tool-call usage report for today only.
 * Reads all of today's log files from `<configDir>/logs/` — both the main
 * `YYYY-MM-DD.jsonl`, rotated `YYYY-MM-DD-N.jsonl`, and compressed
 * `YYYY-MM-DD.jsonl.gz` files.
 * Capped at {@link MAX_LOG_FILES_PER_DAY} files as a safety guard.
 */
export declare function buildToolUsageReport(): Promise<string>;
//# sourceMappingURL=tool-usage.d.ts.map