🚦Signal ControlManually resolve / reject / reset reusable async signals; static methods create pre-resolved or pre-rejected signals.
⏱️Timeout & ConstraintsBuilt-in wait timeout and until constraint functions to control exactly when a signal may resolve.
🛑Abort IntegrationNative AbortController integration; abortAt controls whether to abort on resolve / reject / reset.
🔁Multiplex & Fallbackmultiplex reuses instances by hash for deduplication; defaultValue provides an error fallback.