work_done
Stripped RULES-S.md from 718 to 100 lines. Removed all command detail, system-specific content, inline reference data. Added road sign pointers to KB for all displaced content. Pushed 11 KB entries (IDs 62-72) covering close_sequence, backup, sync, clean, check, history, fog/context, system_db_standard, endpoint_codes, governance_directory, outbound_pending. Added BUILD GATE as mandatory hard gate before any build. Confirmed REFRESH as mid-session standard over SYNC. Added actionable items check to OPEN/REFRESH steps.