Define a lightweight Remember memory review cadence

[bponghneng]

Goal

Add a practical cadence and checklist for periodically reviewing project memory.

Proposed Scope

• Add guidance for when to run $remember review / /remember review.
• Define review triggers such as after major PRs, project milestones, stale context, or monthly maintenance.
• Add a checklist for pruning obsolete entries, resolving todo items, refreshing context, and updating verification metadata.

Value

Keeps memory files accurate without making users maintain them continuously.

Acceptance Criteria

• Review cadence is documented in the Remember skill or approved procedural target.
• Checklist covers retain/remove/act outcomes.
• Claude and Codex versions remain parallel.