IN: one fixed finish, observed checkpoint, original/proposed remaining, reviewed adoption
VALID: available 150 = fixed finish 600 - checkpoint 450; proposed 150 saves 30
INVALID: impossible fit, negative remaining, or missing review => reject without adoption
OUT: automatic reallocation, timer mutation, live sync, user input, storage, network, analytics and real event claims
ROLLBACK: remove only V08 pages, fixtures, sitemap entries and focused checks