/**
 * Structured `[PREFIX] scope: message` logger, grep-friendly for `wrangler tail`.
 *
 * Convention:
 *   [START]    entering a scope (route, cron, external call)
 *   [SUCCESS]  scope returned without error
 *   [FAIL]     scope threw or returned an error result
 *   [FINISH]   scope exited without a semantic outcome (`[SUCCESS]` and
 *              `[FAIL]` are mutually exclusive; `[FINISH]` is the umbrella
 *              you emit in `finally` when both terminal states are noisy)
 *   [INFO]     mid-scope breadcrumbs
 *
 * All emit through `console.log` (Cloudflare Workers pipes stdout to tail).
 * `[FAIL]` also stashes the caller-supplied error via `console.error` for
 * source-map-friendly stack traces in the dashboard.
 */
type Extra = Record<string, unknown> | undefined;
export declare const log: {
    start(scope: string, message?: string, extra?: Extra): void;
    success(scope: string, message?: string, extra?: Extra): void;
    fail(scope: string, message?: string, error?: unknown, extra?: Extra): void;
    finish(scope: string, message?: string, extra?: Extra): void;
    info(scope: string, message?: string, extra?: Extra): void;
};
export type Log = typeof log;
export {};
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