MC-5012

Dependent follow-up for the Iris/Life Manager attention redesign. Dependency: - Start after MC-5011 append-only Telegram send ledger is done and verified. Context: - MC-5003 baseline found morning-briefing is a regular direct emitter (~1/day). - MC-5004 reduced Life scan/digest noise but intentionally left morning briefing as a follow-up. - The attention plan says morning briefing should become exception-based: concise by default, interrupt only for true same-day risk or explicit approval need. Goal: Downgrade morning briefing from broad proactive reporting to exception-based briefing while preserving critical alerts and useful daily context. Scope: - Review the current morning-briefing task prompt and delivery behavior. - Make the smallest reversible prompt/config change so the briefing surfaces only urgent/same-day/high-value items prominently and batches/omits routine low-risk material. - Use the MC-5011 send ledger evidence if available to compare before/after volume. - Do not add new side-effect commands or approval flows. - Update the Iris attention plan with evidence, changed behavior, rollback notes, and next slice. Acceptance: - Morning briefing has an explicit exception-based policy. - Output is concise and recommendation-led: at most 3 visible decision/risk items and exactly one recommended next action when there is anything to do. - Critical/time-sensitive items still bypass quieting criteria. - Non-sending dry-run or prompt validation demonstrates the expected shape. - Relevant syntax/tests pass. - Comment verification and whether Phase B can proceed. Expected check-in: after MC-5011 closes + 90 minutes.