diff --git a/session-logs/2026-06/2026-06-21-howard-gururmm-features-audit-submodule-fix.md b/session-logs/2026-06/2026-06-21-howard-gururmm-features-audit-submodule-fix.md
index 93a3c167..9649fb4d 100644
--- a/session-logs/2026-06/2026-06-21-howard-gururmm-features-audit-submodule-fix.md
+++ b/session-logs/2026-06/2026-06-21-howard-gururmm-features-audit-submodule-fix.md
@@ -86,3 +86,36 @@ No new credentials created. Used (all already vaulted):
 - guru-rmm `origin/main` = `ed8cad3`; the already-shipped info-disclosure fix = `58c1a96`; the stale gitlink the submodule was pinned at = `2e469f1`.
 - Discord DMs to Mike: prod-promote confirmation (msg 1518332316114489505), PR lineup (msg 1518361486509215955).
 - Memory added: `.claude/memory/rmm-dashboard-beta-before-main.md`.
+
+---
+
+## Update: 17:39 PT — concurrent-session fallout + BUG-018 rework to Mike's spec
+
+### Summary
+Discovered a concurrent Claude session (GURU-5070/claude-main, Mike's machine) was working the same guru-rmm tree — branch refs/HEAD kept moving under me. Mike then sent coord decisions: BUG-018 is mine to do as a fast **202 + background purge** (it's row volume, not indexes); BUG-019 he approved + merges himself; pfSense Option A + Tier-1 2a/2b are his/settled. Acted on the guru-rmm fallout only (the rest is GURU-5070's). Created a 6-item TaskList and worked it to done, isolating all work in `git worktree`s + push-by-SHA to dodge the shared-tree races.
+
+Reworked BUG-018 (PR #41) to the 202+bg design, renumbered SPEC-021's migration 060→063 to clear a collision with BUG-019's 060, opened PR #44 for the earlier audit-cleanup branch, and flagged a Gitea-SSH/build-pipeline refusal. Mike replied: BUG-019 built clean (v0.6.67 beta, marker `8b5e0dc`), Gitea SSH was only transiently down (build completed before the refusal), and he pushed a `gururmm-build` skill + `docs/BUILD.md` + build memories (picked up by this sync). Remaining PRs + the stateful-alert-lifecycle shape-spec are handed to another session.
+
+### Key decisions
+- BUG-018 → Mike's **202 + background purge**: mark `status='deleting'` synchronously (fast UPDATE, also the existence check), spawn a background tokio task for the cascade purge, return 202; fleet listings/stats exclude `'deleting'` so the row leaves the UI immediately. Kept the bulk endpoint + FK indexes (mig 061 — speeds the bg purge).
+- Migration order finalized: **060 BUG-019, 061 BUG-018, 062 MSP360, 063 SPEC-021** (renumbered SPEC-021 since Mike merges BUG-019's 060).
+- Always isolate submodule work in a `git worktree` when concurrent sessions may share the tree; commit + push by explicit SHA, never trust the shared branch ref. (Logged as friction.)
+- Stateful-alert-lifecycle shape-spec paused mid-Phase-2 (awaiting priority + out-of-scope) — now handed to another session per Howard.
+
+### Problems encountered
+- Concurrent session moved HEAD/branch refs + mixed both sessions' uncommitted changes into the shared tree; resolved by committing in a worktree off origin/main and push-by-SHA, leaving the other session's files untouched.
+- Build-host `git fetch` over Gitea SSH (`git@172.16.3.20:2222`) refused 3x during validation; validated instead via internal HTTP (`http://...@172.16.3.20:3000`). Mike confirmed it was transient.
+
+### Configuration changes (this update)
+- guru-rmm `fix/bug-018-agent-delete-indexes` (`de9b089`): server/src/api/agents.rs (202 + mark-deleting + bg purge, bulk too), server/src/db/agents.rs (`mark_agents_deleting`, `'deleting'` filter on list/stats queries), dashboard/src/api/client.ts + pages/Agents.tsx (202 flow, `deleted`->`accepted`).
+- guru-rmm `feat/spec-021-and-bug-020-tray-teardown` (`9171f84`): renamed migration `060_logged_in_user_domain.sql` -> `063_`; updated the SPEC-021 note + roadmap reference.
+- Coord: claimed + released lock `gururmm/bug-018-agent-delete`; messaged GURU-5070 (3 msgs).
+
+### Pending (handed to another session per Howard)
+- PRs awaiting Mike's merge: #40 (SPEC-021/BUG-020, mig 063), #41 (BUG-018 202+bg, mig 061), #42 (MSP360, mig 062), #43 (eventlog HIGH), #44 (audit cleanup). Merge migrations in order 060→063.
+- Stateful-alert-lifecycle shape-spec (paused at Phase 2).
+
+### Reference (this update)
+- Branch tips: BUG-018 `de9b089`, SPEC-021 `9171f84`. BUG-019 built `v0.6.67`, marker `8b5e0dc`.
+- New from Mike (via sync): `gururmm-build` skill, guru-rmm `docs/BUILD.md`, memory `feedback_gururmm_build_verification`; fabb3421 app DELETED (use Exchange Operator b43e7342 for client mail, 1873b1b0 for /mailbox).
+- Coord msgs to GURU-5070: 7a4747b8 (claim), 0c2ae45e (done + SSH flag). Discord DM 1518411100927033464 (build-outage flag).