diff --git a/docs/re/BACKLOG.md b/docs/re/BACKLOG.md
index a1bd0738..7a913f16 100644
--- a/docs/re/BACKLOG.md
+++ b/docs/re/BACKLOG.md
@@ -574,6 +574,18 @@ search cannot find a *schedule*.
   already knew this** — several iterations reconstructed it the hard way;
   `grep -rl TextIndex crates/` would have saved the detour. ❔ Minor: `ixud.rs`
   says UTF-16BE, `localization.rs` says LE — one comment is wrong.
+* ✅🔴 **(2026-08-24) REMAINING OB hunt: method works, run unfinished**
+  ([`remaining-ob-hunt.md`](remaining-ob-hunt.md)). Correlate heap words against
+  *named* kill events instead of scanning for a value: **one `e010` event cut ~8 M
+  words to 1056**. 🔴 But the probe saved candidates only at the END and the turn
+  timeout discarded them — **the exact mistake already recorded in
+  `guest-stalls.md` four iterations earlier**. 🔴 And the follow-up attach logged
+  535 s of zero losses with **no stall witness**, so it cannot say whether the
+  guest was quiet or frozen. Both fixed (save per event + `SYLPH_OB_RESUME=1`
+  resume; witness carried over). **Pattern worth acting on: each new probe starts
+  from scratch and re-earns the same lessons — a shared probe harness would stick
+  where written-down lessons have not.** Needs 2–3 `e010` events, i.e. the same
+  combat limit.
   🔴 `SYLPH_HZ=3` refuted as a lever: it gave the LOWEST frame rate (8/s) with the
   most kills, so pilot polling is not the throttle.
 * ~~🚧 BLOCKER: t=210/240 unreachable in one turn~~ — **superseded, see above**;