Makes a UI PR autonomously verifiable: `author` writes an intent spec into the PR body; `run` checks it on the preview (or a local stack with `--env local`) with evidence, an adversarial pass, and telemetry-verify; `verify` (the default) does both, then posts the proof with uploaded screenshots and recordings to the PR's one verify comment; `--post-findings` feeds `review-loop --ui`. Config: `.agents/aw/`. Web only; triggers on "write a preview spec", "verify this PR's preview", "try to break this PR's preview", "/ui-verify".