Erasure

$progression->erase($member) removes:

• the gains whose subject is the member, and the gains the member's gestures brought to an object — the experience a character earned from their sessions —;
• the milestones they reached, and those their gestures reached for an object;
• their streak gestures, frozen units and states.

It returns an Erasure with the three counts. The journal of activity is erased by tilttek/activity; an object's experience earned from other members' gestures stays. tilttek/progression-bundle registers this erasure as a module of phil/privacy-bundle.