Checkin tester

documented

Check in a tester to mark them as active.

POST /api/v2/betas/{beta_id}/testers/{tester_id}/checkin.jsonBetasno implementation yet0 runs

SKILL.md — what a human or an agent should know before calling this action: gotchas, limits, scopes, pagination.

Nothing written yet. Know a gotcha? Write the first note.