diff --git a/docs/HANDOFF.md b/docs/HANDOFF.md
index 70873e5..112d617 100644
--- a/docs/HANDOFF.md
+++ b/docs/HANDOFF.md
@@ -628,7 +628,7 @@ Regression-checked against the real `logs/I-gbkey.json` that caused this: the ol
 logic matches the quota pattern, the new logic yields SUCCESS and feeds the
 detector an empty blob.
 
-## Wave 8 — J-crashsafe: IN FLIGHT, launched 2026-09-12 17:50Z
+## Wave 8 — J-crashsafe: launched 2026-09-12 17:50Z — COMPLETE, see "accepted" below
 Prompt: `tasks/J-crashsafe.txt`. Session id in `logs/J-crashsafe.sid`. Lease
 `bookshelf-wave` held by `tasks/wave-guard.sh`, sentinel `logs/WAVE8-DONE`.
 
@@ -682,3 +682,57 @@ chain leaves the process hung instead of dying.
 **Not in scope, deliberately:** finding the original throwing line. Nobody knows what it
 was and the prompt says not to hunt for it. If the guard lands and the user ever sees
 "unexpected: SomeException" on the scan sheet, THAT is when we learn the answer.
+
+## Wave 8 — J-crashsafe: COMPLETE, verified by the orchestrator 2026-09-13
+Commit `3409726`. Worker finished 09-12 18:20Z: 1 attempt, 0 quota waits, 111 turns,
+$4.02. Its report was honest and every claim below re-checked.
+
+| Check | Result |
+|---|---|
+| `./tasks/gw assembleDebug --rerun-tasks` | exit 0 |
+| `./tasks/gw testDebugUnitTest` | exit 0 — **205 tests**, 2 skipped, 0 failures (was 190), from `TEST-*.xml` |
+| `./tasks/gw verifyPaparazziDebug` | exit 0 |
+| `grep "always 'false'"` on the rerun build | **0 hits** |
+| boundary check | clean — data/metadata, ui/scan, ui/settings, new `diagnostics/`, CrashReporter wiring in AppContainer + BookshelfApplication; no build files |
+
+Read, not just trusted: `CancellationException` is caught and rethrown AHEAD of the
+`Throwable` catch in both clients and in `ScanViewModel.runLookup` (the import is
+`kotlinx.coroutines.CancellationException`, the same type). Reasons carry
+`e.javaClass.simpleName` only. `RetryPolicy` does not retry UNEXPECTED.
+`CrashReporter.install()` calls `previous?.uncaughtException` in a `finally`, so the
+process still dies even if writing the report throws. The Diagnostics PNGs (empty and
+populated, light and dark) match the rest of settings. One nit: outlined mahogany
+buttons on the dark ground are low-contrast, but "Sign out" already looked like that.
+
+**Open, flagged by the worker, deliberately out of scope:** `performSave` /
+`performSaveManualEntry` make the same unguarded Room calls `runLookup` used to. A
+disk failure while SAVING can still crash the process. Same failure class; small
+follow-up if wanted.
+
+**The payoff is on the phone, not here.** If the original crash recurs, it now lands
+either as "unexpected: SomeException" on the scan sheet (caught) or as a stored trace
+under Settings → Diagnostics → Share (uncaught). Either one finally tells us the class.
+
+### HAZARD #10 — the wave-guard held the sprite hot for 17 hours
+The guard's loop was `while pgrep -f 'run-task\.sh|run-resume\.sh'`. The orchestrator
+launched the wave from ONE `bash -c '... setsid nohup ./tasks/run-task.sh ... &
+... wave-guard.sh ... & sleep 8; ...'`, and that shell (re-parented to PID 1) was
+still alive the next day. Its command line contains `run-task.sh`, so the guard saw
+"workers still running" from 18:20Z on 09-12 until 11:16Z on 09-13, renewing the lease
+every 15 min. This is HAZARD #6 again, inside the guard itself. Worse than hazard
+#8: #8 fails SAFE (the sprite sleeps); this fails EXPENSIVE, and silently, because the
+guard log says "workers still running" either way.
+
+Resolved by killing that one stale shell by PID. The guard then exited normally and
+wrote `WAVE8-DONE` and released the lease.
+
+**Fixed in `tasks/wave-guard.sh`** (safe: nothing was running). `workers_running()`
+now matches argv SHAPE: argv[0] is bash, argv[1] IS `run-task.sh`/`run-resume.sh`,
+and argv[2] is one of THIS wave's task names. A `bash -c` has argv[1] = `-c` and
+cannot match. Tested with no worker, with a decoy `bash -c` containing
+`./tasks/run-task.sh J-fake`, with a real-shaped detached worker (and with a
+non-matching task name), and after killing it. Only the real worker counts as running.
+
+**When checking a wave, compare the guard log with the worker's `.state`:** a
+`workers still running` renewal timestamped AFTER `.state` says SUCCESS means
+the guard is stuck. It is not a slow worker.
diff --git a/logs/I-gbkey.sid b/logs/I-gbkey.sid
new file mode 100644
index 0000000..8986fb9
--- /dev/null
+++ b/logs/I-gbkey.sid
@@ -0,0 +1 @@
+7f72ab05-2e62-49a0-858f-638646c68767
diff --git a/logs/WAVE7-DONE b/logs/WAVE7-DONE
new file mode 100644
index 0000000..2e8cbaa
--- /dev/null
+++ b/logs/WAVE7-DONE
@@ -0,0 +1,10 @@
+=== WAVE7-DONE written 2026-09-11T23:25:00+00:00 ===
+Workers finished. The orchestrator was NOT necessarily alive for this.
+
+--- I-gbkey ---
+[2026-09-11T23:23:43+00:00] I-gbkey: QUOTA hit (wait #1). sleeping 600s then probing again.
+cost=$1.5929609999999998 turns=51
+
+NEXT: orchestrator must independently verify before accepting:
+  cd ~/bookshelf && ./tasks/gw assembleDebug && ./tasks/gw testDebugUnitTest
+  git status --porcelain   # boundary check: who touched what
diff --git a/tasks/wave-guard.sh b/tasks/wave-guard.sh
index 4e393d3..9686b63 100755
--- a/tasks/wave-guard.sh
+++ b/tasks/wave-guard.sh
@@ -57,7 +57,20 @@ else
 fi
 last_renew=$(date +%s)
 
-while pgrep -f 'run-task\.sh|run-resume\.sh' >/dev/null; do
+# WAVE 8 POST-MORTEM — why this is not `pgrep -f 'run-task\.sh'`:
+# pgrep -f matches ANY command line containing that text. The orchestrator's own
+# launching `bash -c '... setsid nohup ./tasks/run-task.sh ...'` stayed alive after
+# the worker finished, so the guard saw "workers still running" for 17 hours and
+# held the sprite hot the whole time (HAZARD #6). Match on argv SHAPE instead: the
+# interpreter is bash, argv[1] IS the runner script, and argv[2] is one of THIS
+# wave's task names. A `bash -c` has argv[1] = "-c" and can never match.
+workers_running() {
+  ps -eo args= | awk -v tasks=" ${TASKS[*]} " '
+    $1 ~ /(^|\/)bash$/ && $2 ~ /(^|\/)run-(task|resume)\.sh$/ && index(tasks, " " $3 " ") { found=1 }
+    END { exit !found }'
+}
+
+while workers_running; do
   sleep "$POLL"
   now=$(date +%s)
   if [ $(( now - last_renew )) -ge "$RENEW" ]; then