R-872 closed (proven at 05:00, two channels); R-887 night count 0; numbers 138 -> 137

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

documentation/backlog/CLOSED-ITEMS.md

@@ -32,6 +32,7 @@ The full text of every row below: `git show e866a66b56:documentation/backlog/OPE
 
 | Row | What | Closed | Evidence |
 |---|---|---|---|
+| **R-872** | **A box that is off every night never raised a missed-backup alarm.** (P2) — full text `git show 3aba200293:documentation/backlog/OPEN-ITEMS.md` | CLOSED 2026-10-07 — PROVEN LIVE (hub v0.134.0 + v0.140.0) | 05:00 run: `Deadline check: Tester-2 is DOWN — judged on the longer lines (dump 48h0m0s, whole-guest 72h0m0s): dump missed=1 backup missed=0`; the operator mailbox holds `[Felhom] Tester-2: expected_dbdump_missed` sent 05:00 (a second channel). `backup missed=0` is correct: the last whole-guest copy was 60.5 h old against the 72 h line. `audits/night-burndown-2026-10-06/r872-check.txt` |
 | **R-392** | **No architecture document covers the two-AI workflow.** (P4) — full text `git show 93b942f136:documentation/backlog/OPEN-ITEMS.md` | CLOSED 2026-10-06 night — WRITTEN | `documentation/architecture/12-agent-tooling.md`: the two roles and what each owns, where each kind of instruction lives, who may change an instruction file (decision 150), and why the boundaries sit where they do; it points at the doc-authoring skill and does not restate it. Routed from `.claude/rules/docs.md`. |
 | **R-377** | **`CONTEXT.md`'s standing rulings are 188 KB in one section with no sub-headings, and that is why nobody reads them.** (P4) | CLOSED 2026-10-06 night — DONE AS THE ROW SAID | 44 `### S-n (date)` sub-headings added above the rulings in `CONTEXT.md` § Standing rulings; no ruling's text edited, reordered or compressed (the diff is 88 added lines, 0 removed). Five ids are used twice in the log (S-11..S-15) — kept as written, the log is never edited. |