Feature request: native absence assertion (`is absent` / `wait gone`)

[Procopis-QG]

There's currently no in-script way to assert that an element is not present. Every selector-taking primitive — including is hidden — fails with Selector did not match when the selector resolves to nothing, so is hidden can only distinguish "resolvable but hidden" from "visible", not "gone". (#1515 improved the error taxonomy around this for wait, but there's still no positive assertion for absence.)

On React Native this bites hard: RN typically unmounts hidden UI rather than hiding it, so "the modal closed", "the spinner went away", "the badge is no longer shown" are all non-existence checks — and none of them can be expressed inside a test/replay script today.

Our workaround

We lift these assertions out of the replay script and run them as separate is hidden probes between agent-device test segments, treating Selector did not match on the probe's exit as a pass (polled for the wait-style variant). It works, but it splits one logical script into several invocations and loses the single-run reporter timeline.

Suggested shapes

Either of these would remove the workaround:

• is absent <selector> — passes when the selector resolves to nothing (or only to a hidden element), fails when a matching element is visible.
• wait gone <selector> [timeoutMs] — polls until the selector no longer matches, symmetrical with the existing wait <selector>.

Happy to provide more detail on the RN unmount semantics or scripts that reproduce the gap.

[thymikee]

Confirmed as a valid command-surface gap. This stays needs-triage rather than ready-for-agent until a maintainer chooses the contract: whether absence means no selector match or no visible match, whether the canonical surface is an is predicate or a polling wait form, and how timeout/error reporting and replay recording should behave. The RN unmount example is sufficient motivation; no additional reporter evidence is needed right now.