/**
 * Options for {@link inferEnvironmentName}.
 * Tests pass a custom `scope` to simulate worker / window globals.
 */
export type InferEnvironmentNameOptions = {
    scope?: unknown;
};
/**
 * Infer a writer/environment identifier from the current execution context.
 *
 * Safe to invoke in any JS runtime — never throws. Falls back to `unknown::<suffix>`
 * when the runtime can't be classified.
 *
 * Format is always three colon-separated segments: `<scope>:<name>:<suffix>`.
 * - `scope` — `tab | dedicated-worker | shared-worker | service-worker | cf-worker | node | unknown`.
 * - `name` — `location.origin` for tabs, `self.name` for browser workers, `process.pid`
 *   for node, empty for cf-workers / service workers / anonymous workers.
 *   Note that `name` may itself contain `:` (e.g. `http://localhost:5173`); when parsing,
 *   take the first segment as scope and the last as suffix, and treat everything in
 *   between as the name.
 * - `suffix` — 6-char random; stable per-tab via `sessionStorage`, fresh per worker / process instance.
 */
export declare const inferEnvironmentName: (options?: InferEnvironmentNameOptions) => string;
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