/**
 * `consoleObservability()` — default ObservabilityStrategy.
 *
 * Pattern: Strategy. Adapter for `globalThis.console`. Used when no
 *          vendor-specific strategy is configured (zero-config dev
 *          experience). Same role as `NoOpCacheStrategy` is for the
 *          cache layer.
 * Role:    Tier-1 fallback — print every event to the console with a
 *          one-line type+payload summary. Vendor-neutral, dependency-
 *          free, works in browser + Node + Deno + Bun.
 *
 * Use when:
 *   - Local development (`agent.enable.observability()` with no opts)
 *   - CI logs ("what events fired during this test?")
 *   - Tier-1 of compose chains (`compose([console(), datadog()])`)
 *
 * Don't use when: production. Console output is unstructured + can't
 * be queried; switch to a vendor strategy (Datadog, OTel, CloudWatch).
 */
import type { AgentfootprintEvent } from '../../events/registry.js';
import type { ObservabilityStrategy } from '../types.js';
export interface ConsoleObservabilityOptions {
    /**
     * Where to write. Defaults to `globalThis.console`. Override for
     * tests or to wrap with a custom sink (browser DevTools' grouped
     * console, a Node.js stream, etc.).
     */
    readonly logger?: {
        log(...args: unknown[]): void;
    };
    /**
     * Custom line formatter. Receives the typed event; returns the line.
     * Defaults to `[type] payload-as-JSON`. Override to colorize, filter
     * fields, or pretty-print.
     */
    readonly format?: (event: AgentfootprintEvent) => string;
}
/**
 * Factory. Returns a fresh ObservabilityStrategy each call so multiple
 * agents in the same process get independent instances.
 */
export declare function consoleObservability(opts?: ConsoleObservabilityOptions): ObservabilityStrategy;