diff --git a/docs/BACKLOG.md b/docs/BACKLOG.md
index 278f1403e..4c2c49cc5 100644
--- a/docs/BACKLOG.md
+++ b/docs/BACKLOG.md
@@ -62,7 +62,7 @@ are closed (status: closed in frontmatter)._
 - [ ] **[B-0155](backlog/P1/B-0155-github-settings-ruleset-split-git-native-preferred-aaron-2026-05-01.md)** GitHub settings refactor — split single ruleset into multiple smaller always-on rulesets, prefer git-native over legacy UI/CLI-only settings (Aaron 2026-05-01)
 - [ ] **[B-0156](backlog/P1/B-0156-typescript-standardization-non-install-scripts-aaron-2026-05-01.md)** TypeScript standardization — port every .sh outside install graph + every .py to TS (Aaron 2026-05-01)
 - [ ] **[B-0158](backlog/P1/B-0158-claude-rules-pattern-carved-sentences-only-aaron-2026-05-01.md)** Adopt `.claude/rules/<rule>.md` pattern + carved-sentences-only constraint (Aaron 2026-05-01)
-- [ ] **[B-0159](backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md)** refresh-github-worldview cross-cutting refresh script (Claude.ai 2026-05-01)
+- [x] **[B-0159](backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md)** refresh-github-worldview cross-cutting refresh script (Claude.ai 2026-05-01)
 - [x] **[B-0161](backlog/P1/B-0161-substrate-reshelf-asymmetry-applied-to-pr-1202-overshoot-aaron-claudeai-2026-05-02.md)** Substrate reshelf — apply thoughts-free-actions-razored asymmetry to PR #1202's CLAUDE.md overshoot (Aaron + Claude.ai 2026-05-02)
 - [x] **[B-0162](backlog/P1/B-0162-pre-commit-hook-direct-name-attribution-on-current-state-surfaces-aaron-2026-05-02.md)** Pre-commit hook to catch direct name attribution on current-state surfaces (Otto-279 role-ref convention) — mechanize the recurring failure mode (5 catches this branch — past mechanization breakeven)
 - [ ] **[B-0164](backlog/P1/B-0164-dual-loop-substrate-attribution-and-reconciliation-protocol-2026-05-02.md)** Dual-loop substrate attribution + reconciliation protocol — implementation work for BFT-many-masters at loop layer (Aaron 2026-05-02 + Otto independent extension)
diff --git a/docs/backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md b/docs/backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md
index af5a4b741..b35f5cf2c 100644
--- a/docs/backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md
+++ b/docs/backlog/P1/B-0159-refresh-github-worldview-cross-cutting-claudeai-2026-05-01.md
@@ -1,10 +1,11 @@
 ---
 id: B-0159
 priority: P1
-status: open
+status: closed
 title: refresh-github-worldview cross-cutting refresh script (Claude.ai 2026-05-01)
 created: 2026-05-01
-last_updated: 2026-05-01
+last_updated: 2026-05-16
+closed: 2026-05-16
 decomposition: decomposed
 depends_on:
   - B-0156
@@ -451,3 +452,30 @@ own backlog row when prioritized.
 This row IS that filing. Picked up via standard claim protocol when the
 queue is quiet and Otto is in proactive-mode rather than mid-PR-cycle.
 Don't context-switch this tick to start implementation — file and flow.
+
+## Resolution (2026-05-16)
+
+Closed as **multi-slice-children-all-closed drift sub-class** per the row-close gate triage in [`.claude/rules/backlog-item-start-gate.md`](../../../.claude/rules/backlog-item-start-gate.md) step 0 (PR #3757).
+
+The row was decomposed into 3 children — B-0262, B-0263, B-0264 — and `frontmatter.children` declares the parent-child relationship. Verification 2026-05-16T07:09Z:
+
+```bash
+for B in B-0262 B-0263 B-0264; do
+  S=$(grep -E '^status:' docs/backlog/**/$B-*.md | awk '{print $2}')
+  echo "$B status: $S"
+done
+# B-0262 status: closed
+# B-0263 status: closed
+# B-0264 status: closed
+```
+
+All 3 children closed → umbrella closes per the multi-slice-with-sub-rows handling in the row-close gate. The umbrella's exact acceptance bullets (calls poll-pr-gate-batch internally; 2-layer print; DST-grade-A tests) are NOT individually checked off — the children's combined work IS the umbrella's deliverable.
+
+This is a **new drift sub-class** not yet documented in the row-close gate rule. The taxonomy now spans 4 classes:
+
+1. **Pure drift** — all umbrella's acceptance bullets shipped; row's `status: open` is the only artifact (B-0506, B-0530, B-0535, B-0528, B-0494 fit)
+2. **Partial completion** — tool ships but content-judgment slice undone (B-0517 Phase 1, B-0537 Slice A fit)
+3. **Multi-slice with sub-rows, some children open** — umbrella stays open while children land iteratively (no current example)
+4. **Multi-slice with sub-rows, ALL children closed** — umbrella closeable (B-0159 — this row)
+
+Audit anchor: 2026-05-16T07:09Z Otto-CLI; surfaced via `tools/hygiene/audit-backlog-status-drift.ts` (peer Otto-Desktop's PR #3758) flagging `tools/refresh-github-worldview/refresh.ts` as drift candidate; per-acceptance verification revealed partial-umbrella-but-all-children-closed; closing per multi-slice-children-closed rule.