/**
 * TC39 Signals Polyfill for XMachines Play Architecture
 *
 * Provides fine-grained reactive state primitives based on the TC39 Signals proposal (Stage 1).
 * This package isolates the TC39 polyfill to protect the codebase from Stage 1 API changes.
 *
 * **Architectural Context:** Implements **Signal-Only Reactivity (INV-05)** by providing
 * the reactive primitives that enable Actor-to-Infrastructure communication without
 * subscriptions or event emitters. All state propagation in Play Architecture uses
 * TC39 Signals for automatic dependency tracking and glitch-free updates.
 *
 * @packageDocumentation
 * @module @xmachines/play-signals
 *
 * @example
 * Basic Signal usage
 * ```typescript
 * import { Signal } from "@xmachines/play-signals";
 *
 * // Create state signal
 * const count = new Signal.State(0);
 *
 * // Create computed signal
 * const doubled = new Signal.Computed(() => count.get() * 2);
 *
 * // Observe changes
 * const watcher = new Signal.subtle.Watcher(() => {
 *   console.log('Count:', count.get(), 'Doubled:', doubled.get());
 * });
 * watcher.watch(count);
 *
 * count.set(5); // Logs: Count: 5 Doubled: 10
 * ```
 *
 * @see [Play RFC](../../docs/rfc/play.md) - Invariant INV-05
 * @see {@link https://github.com/tc39/proposal-signals | TC39 Signals Proposal}
 *
 * @remarks
 * **Stage 1 Status:** TC39 Signals is currently Stage 1 in the TC39 process. This package
 * uses the official `signal-polyfill` reference implementation to isolate the codebase
 * from potential API changes as the proposal evolves. All signal imports should go through
 * this package to maintain isolation.
 *
 * **Why Isolation:** By re-exporting the polyfill through this dedicated package, we can
 * update the polyfill version or adapt to API changes in one place without touching
 * consuming packages. This architectural decision protects against Stage 1 API churn.
 */
export { Signal } from "signal-polyfill";
export { watchSignal } from "./watch-signal.js";
export type { SignalState, SignalComputed, SignalWatcher, SignalOptions, ComputedOptions, WatcherNotify, } from "./types.js";
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