Memory placement is chosen from measured precision, within $20 of Coral

Where memory is injected (the system prompt or the volatile tail channel) is decided AFTER the lab’s grounded-answer round measures precision and the provider’s cached tokens for both placements; the pros and cons come back to the user with the numbers (UR-03). That round may spend up to $20 of Coral (a hard cap: stop and report at the cap); the key reaches the process from the environment only (D-09).