Experiments
Migrate Running Experiments
Register the currently-running legacy experiments as running rows (synchronous, commits immediately) and kick off the historical ab_assignment backfill from ab_arms in the BACKGROUND — the backfill is a heavy bulk INSERT that would blow the HTTP timeout, so it runs unbound by the request. Both halves are idempotent; poll GET /sync-check for backfill progress (checked grows as it lands).
post/api/experiments/migrate-running
Headers
x-admin-tokenstring nullable
Response
Successful Response
{"stackTrail":"paths:/api/experiments/migrate-running:post:responses:200:content:application/json:schema","oasType":"schema","type":"unknown"}