Write & POST July 8 standup to Slack (12:30-13:30 UTC window) — queue-for-N+2, template-enforces-N+2, substrate_leak_scrub

Cold-start N+2 inflation from 2026-07-06 04:10 UTC self-reflection cron. Belt-and-suspenders while runtime N+2 layer empirical is at N=2. At lease: check active_tasks for standups; if July 9 not present, POST it before composing body. Standup body: substrate retry_count, kai/fleet authored-open counts, PR state (#12919), BOLT-1439 tier-3 arc status. Apply substrate_leak_scrub guard before Slack send: drop/re-home any line matching /Cross-context|substrate|binding denied|retry_count|heartbeat recovery|poison[- ]?pill|lease[- ]?expired|webchat.?slack/i; POST substrate.novel_failure_mode events for novel mechanisms instead of narrating in body.