Write & POST July 11 standup to Slack (12:30-13:30 UTC window) — queue-for-N+2, template-enforces-N+2, substrate_leak_scrub

Cold-start standup for July 11 2026. Trigger 2026-07-11T12:30Z. Compose in memory/standups/2026-07-11.md then Slack send to Carson DM (D0B0980TR88). Apply COMPOSE_GUARD_DO_NOT_SEND substrate_leak_scrub before send (drop or move to result.substrate_notes any line matching /Cross-context|substrate|binding denied|retry_count|heartbeat recovery|poison[- ]?pill|lease[- ]?expired|webchat.?slack/i). Report kai_owned_active, non_dependabot_open (or fleet_authored_open if the metric-basis is stable), any Carson-blocking items, and AGENTS.md autonomous-PR-maintenance proposal status (DMed 2026-07-08 09:57Z, awaiting approve/modify/forbid). Runtime N+2 queue-for-N+2 rule remains: on complete, queue July 13 standup. IMPORTANT: aim delivery inside 12:30-13:30 window — not before 12:30 (July 8 shipped ~3 min early) and not after 13:30 (July 7 shipped 13 min late). If starting before window, hold composition until 12:30.