diff --git a/results/PROVENANCE.md b/results/PROVENANCE.md
index ec5e9d8..2124e9c 100644
--- a/results/PROVENANCE.md
+++ b/results/PROVENANCE.md
@@ -1,6 +1,16 @@
 # Provenance — canonical campaign 2026-07-14
 
-- **Server build:** electric-sql/electric#4697 head `d5589289d` (perf/wal-checkpoint-syncfs), image `durable-streams:dev` digest `0e8bfe920065`.
+**Split build provenance.** The write/durability suites were re-run on the
+electric#4710 recovery-hardening build; the rest keep their #4697 values
+(#4710 changes no read/ursula/mixed-cal/mixed-writes code path).
+
+- **Write-path suites (`canonical-write`, `canonical-mixed-delivery`):**
+  electric-sql/electric#4710 head `abca3a5f7` (fix/recovery-hardening), image
+  `durable-streams:dev` digest `93803a261706`. Re-validation of the durability
+  hardening — no write regression vs #4697 (wal ±1%, memory flat).
+- **All other suites (`canonical-write-ursula`, `canonical-reads-*`,
+  `canonical-mixed-cal`, `canonical-mixed-writes`):** electric#4697 head
+  `d5589289d` (perf/wal-checkpoint-syncfs), image digest `0e8bfe920065`.
 - **Ursula:** upstream `ghcr.io/tonbo-io/ursula:v0.2.0`.
 - **Hardware:** canonical-write on `c4d-standard-64-lssd` raw-block (STATIC_CPU=1, GUARANTEED=1, splitlane3x3 manifest); ursula/reads/mixed on `c4d-standard-16-lssd` stock manifests. Clients `n2d-standard-32` Spot. europe-west4.
 - **Harness:** ds-bench bench/canonical-suites @ 2b0ada5.
diff --git a/results/REPORT.md b/results/REPORT.md
index 1c06e15..9691fad 100644
--- a/results/REPORT.md
+++ b/results/REPORT.md
@@ -4,20 +4,35 @@ First run of the canonical suite set, on the electric#4697 merged-state build
 (syncfs checkpoints, per-shard triggers, stream lanes; see WAL_TUNING.md).
 Provenance in `PROVENANCE.md`; per-suite grids in each subdirectory.
 
+> **Write-path re-validation for electric#4710 (2026-07-14).** The two
+> write/durability suites — `canonical-write` and `canonical-mixed-delivery` —
+> were re-run on the #4710 recovery-hardening build (fail-stop durability
+> barriers, always-sync sidecar, extra parent-dir fsyncs on the WAL path). Those
+> two sections below now carry **#4710** numbers; the read/ursula/mixed-cal/
+> mixed-writes suites are unchanged code paths under #4710 and keep their #4697
+> values. **Verdict: no write regression** (see the per-section deltas). Split
+> provenance recorded in `PROVENANCE.md`.
+
 ## 1. Write saturation (`canonical-write`, `canonical-write-ursula`)
 
-Peak append/s at saturation (256 B payloads):
+Peak append/s at saturation (256 B payloads). **durable-streams columns = #4710**;
+Δ vs the #4697 baseline in parentheses:
 
 | streams | wal-ideal | memory | ursula-mem | ursula-disk |
 |---|---|---|---|---|
 | 100  | — | — | 52.0k | 4.5k |
 | 1k   | — | — | 54.7k | 7.4k |
-| 10k  | 417.0k | 680.4k | 49.0k | 8.3k |
-| 100k | **382.3k** | **631.5k** | — | — |
+| 10k  | 413.0k (−1.0%) | 669.0k (−1.6%) | 49.0k | 8.3k |
+| 100k | **386.0k (+1.0%)** | **628.0k (−0.5%)** | — | — |
 
 - All four durable-streams cells are true plateaus (pinned rungs). **No
-  cardinality cliff: −8% (wal) / −7% (memory) from 10k→100k.** Regression gates
-  (wal@100k > 250k, memory@100k > 400k) passed with wide margin.
+  cardinality cliff: −6.5% (wal) / −6.1% (memory) from 10k→100k.** Regression
+  gates (wal@100k > 250k, memory@100k > 400k) passed with wide margin.
+- **#4710's durability barriers cost nothing measurable on the write path**:
+  wal is within ±1% of #4697 (100k even +1%), and memory is flat (it takes no
+  fsync barrier, so the hardening cannot touch it) — the two move exactly as the
+  code predicts. The ~5% dips seen mid-sweep were the 8-pod ladder rung; both wal
+  cells peak at the 4-pod rung (client/contention-bound, not server-bound).
 - wal-ideal = the WAL_TUNING.md configuration (3 stream lanes + 3 WAL lanes,
   1 GiB checkpoint budget, pinned cores). memory benefits from the same pinned
   cores (previous best 512k on shared cores).
@@ -43,19 +58,21 @@ conns, p99 2–3 ms. ursula matches at 10 streams but degrades at 100 streams
   49.9–50.0k at 0 / 1k / 10k / 100k readers while serving up to 4,986 replays/s
   at 303 MiB/s. **The premise holds: 100k concurrent catch-up readers cost the
   write path nothing.**
-- **Delivery under write load (2000 SSE subscribers):**
+- **Delivery under write load (2000 SSE subscribers) — #4710:**
 
 | writes/s | wal del/s (p99 ms) | memory del/s (p99 ms) |
 |---|---|---|
-| 4k  | 3.3k (138) | 3.3k (151) |
-| 16k | 15.9k (54) | 13.3k (5) |
-| 40k | 33.3k (86) | 33.2k (2) |
-| 66k | 54.9k (107) | 65.7k (8) |
-| max | 63.8k @ 85k writes (106) | **126.7k @ 127k writes (45)** |
-
-  **The 2026-07-02 memory-mode delivery collapse is GONE** on this build:
-  memory delivery tracks writes 1:1 all the way to 127k/s. wal delivery keeps
-  pace to ~40k writes/s and caps at ~64k del/s at full write saturation.
+| 4k  | 4.0k (147) | 3.3k (140) |
+| 16k | 15.9k (51) | 15.9k (51) |
+| 40k | 33.3k (86) | 39.8k (5) |
+| 66k | 65.7k (92) | 65.7k (7) |
+| max | 64.1k @ 84k writes (69) | **139.3k @ 140k writes (63)** |
+
+  **The 2026-07-02 memory-mode delivery collapse stays GONE** on #4710:
+  memory delivery tracks writes 1:1 all the way to 140k/s (baseline #4697 was
+  127k — the difference is run-to-run headroom, not a code change). wal delivery
+  keeps pace to ~66k writes/s and caps at ~64k del/s at full write saturation —
+  same shape as #4697, no regression from the added durability barriers.
 
 ## Known gaps & artifacts
 
diff --git a/results/canonical-mixed-delivery/aggregate.csv b/results/canonical-mixed-delivery/aggregate.csv
index 3f9ee30..1a3c081 100644
--- a/results/canonical-mixed-delivery/aggregate.csv
+++ b/results/canonical-mixed-delivery/aggregate.csv
@@ -1,11 +1,11 @@
 mode,stream_count,sweep,level,readers,subscribers,writer_rate,read_rate,write_ops_per_sec,write_p50,write_p99,read_ops_per_sec,read_mib_per_sec,read_p50,read_p99,events_per_sec,delivery_p50,delivery_p99,write_bp,write_err,read_bp,read_err,status,reason
-memory,2000,writer_rate,0,0,2000,0,0,127139.0,14.527,41.279,0.0,0.0,,,126729.93333333333,12.015,45.023,0,0,0,0,ok,complete
-memory,2000,writer_rate,2,0,2000,2,0,4066.6666666666665,1.682,129.407,0.0,0.0,,,3341.3333333333335,0.924,150.655,0,0,0,0,ok,complete
-memory,2000,writer_rate,8,0,2000,8,0,16047.333333333334,1.654,3.761,0.0,0.0,,,13305.3,0.954,5.063,0,0,0,0,ok,complete
-memory,2000,writer_rate,20,0,2000,20,0,39984.833333333336,1.822,3.033,0.0,0.0,,,33226.433333333334,1.09,2.333,0,0,0,0,ok,complete
-memory,2000,writer_rate,33,0,2000,33,0,65920.43333333333,2.101,93.759,0.0,0.0,,,65691.26666666666,1.214,8.367,0,0,0,0,ok,complete
-wal,2000,writer_rate,0,0,2000,0,0,85168.3,21.935,95.871,0.0,0.0,,,63848.26666666667,35.807,105.599,0,0,0,0,ok,complete
-wal,2000,writer_rate,2,0,2000,2,0,4066.6666666666665,1.67,121.151,0.0,0.0,,,3336.4666666666667,1.011,137.471,0,0,0,0,ok,complete
-wal,2000,writer_rate,8,0,2000,8,0,16048.966666666667,1.693,58.143,0.0,0.0,,,15944.433333333332,1.063,54.175,0,0,0,0,ok,complete
-wal,2000,writer_rate,20,0,2000,20,0,39977.566666666666,2.251,135.807,0.0,0.0,,,33261.933333333334,1.437,86.079,0,0,0,0,ok,complete
-wal,2000,writer_rate,33,0,2000,33,0,65915.2,10.119,262.399,0.0,0.0,,,54853.333333333336,10.063,107.071,0,0,0,0,ok,complete
+memory,2000,writer_rate,0,0,2000,0,0,139737.13333333333,9.423,47.615,0.0,0.0,,,139265.1,11.679,62.783,0,0,0,0,ok,complete
+memory,2000,writer_rate,2,0,2000,2,0,4066.6666666666665,1.705,122.943,0.0,0.0,,,3339.0,0.929,139.519,0,0,0,0,ok,complete
+memory,2000,writer_rate,8,0,2000,8,0,16051.533333333333,1.799,53.471,0.0,0.0,,,15946.133333333333,1.078,51.135,0,0,0,0,ok,complete
+memory,2000,writer_rate,20,0,2000,20,0,39976.4,1.925,37.727,0.0,0.0,,,39816.73333333333,1.111,4.515,0,0,0,0,ok,complete
+memory,2000,writer_rate,33,0,2000,33,0,65893.53333333334,2.189,63.167,0.0,0.0,,,65674.93333333333,1.242,6.623,0,0,0,0,ok,complete
+wal,2000,writer_rate,0,0,2000,0,0,84265.16666666667,22.399,70.463,0.0,0.0,,,64053.333333333336,36.735,68.991,0,0,0,0,ok,complete
+wal,2000,writer_rate,2,0,2000,2,0,4066.6666666666665,1.704,146.687,0.0,0.0,,,4000.0,1.015,147.327,0,0,0,0,ok,complete
+wal,2000,writer_rate,8,0,2000,8,0,16051.533333333333,1.799,53.471,0.0,0.0,,,15946.133333333333,1.078,51.135,0,0,0,0,ok,complete
+wal,2000,writer_rate,20,0,2000,20,0,39980.7,2.363,131.071,0.0,0.0,,,33258.73333333333,1.517,85.567,0,0,0,0,ok,complete
+wal,2000,writer_rate,33,0,2000,33,0,65920.33333333333,10.735,304.383,0.0,0.0,,,65681.7,10.279,91.519,0,0,0,0,ok,complete
diff --git a/results/canonical-mixed-delivery/aggregate.json b/results/canonical-mixed-delivery/aggregate.json
index bc6166c..309dd6d 100644
--- a/results/canonical-mixed-delivery/aggregate.json
+++ b/results/canonical-mixed-delivery/aggregate.json
@@ -8,16 +8,16 @@
     "subscribers": 2000,
     "writer_rate": 0,
     "read_rate": 0,
-    "write_ops_per_sec": 127139.0,
-    "write_p50": 14.527,
-    "write_p99": 41.279,
+    "write_ops_per_sec": 139737.13333333333,
+    "write_p50": 9.423,
+    "write_p99": 47.615,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 126729.93333333333,
-    "delivery_p50": 12.015,
-    "delivery_p99": 45.023,
+    "events_per_sec": 139265.1,
+    "delivery_p50": 11.679,
+    "delivery_p99": 62.783,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -35,15 +35,15 @@
     "writer_rate": 2,
     "read_rate": 0,
     "write_ops_per_sec": 4066.6666666666665,
-    "write_p50": 1.682,
-    "write_p99": 129.407,
+    "write_p50": 1.705,
+    "write_p99": 122.943,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 3341.3333333333335,
-    "delivery_p50": 0.924,
-    "delivery_p99": 150.655,
+    "events_per_sec": 3339.0,
+    "delivery_p50": 0.929,
+    "delivery_p99": 139.519,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -60,16 +60,16 @@
     "subscribers": 2000,
     "writer_rate": 8,
     "read_rate": 0,
-    "write_ops_per_sec": 16047.333333333334,
-    "write_p50": 1.654,
-    "write_p99": 3.761,
+    "write_ops_per_sec": 16051.533333333333,
+    "write_p50": 1.799,
+    "write_p99": 53.471,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 13305.3,
-    "delivery_p50": 0.954,
-    "delivery_p99": 5.063,
+    "events_per_sec": 15946.133333333333,
+    "delivery_p50": 1.078,
+    "delivery_p99": 51.135,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -86,16 +86,16 @@
     "subscribers": 2000,
     "writer_rate": 20,
     "read_rate": 0,
-    "write_ops_per_sec": 39984.833333333336,
-    "write_p50": 1.822,
-    "write_p99": 3.033,
+    "write_ops_per_sec": 39976.4,
+    "write_p50": 1.925,
+    "write_p99": 37.727,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 33226.433333333334,
-    "delivery_p50": 1.09,
-    "delivery_p99": 2.333,
+    "events_per_sec": 39816.73333333333,
+    "delivery_p50": 1.111,
+    "delivery_p99": 4.515,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -112,16 +112,16 @@
     "subscribers": 2000,
     "writer_rate": 33,
     "read_rate": 0,
-    "write_ops_per_sec": 65920.43333333333,
-    "write_p50": 2.101,
-    "write_p99": 93.759,
+    "write_ops_per_sec": 65893.53333333334,
+    "write_p50": 2.189,
+    "write_p99": 63.167,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 65691.26666666666,
-    "delivery_p50": 1.214,
-    "delivery_p99": 8.367,
+    "events_per_sec": 65674.93333333333,
+    "delivery_p50": 1.242,
+    "delivery_p99": 6.623,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -138,16 +138,16 @@
     "subscribers": 2000,
     "writer_rate": 0,
     "read_rate": 0,
-    "write_ops_per_sec": 85168.3,
-    "write_p50": 21.935,
-    "write_p99": 95.871,
+    "write_ops_per_sec": 84265.16666666667,
+    "write_p50": 22.399,
+    "write_p99": 70.463,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 63848.26666666667,
-    "delivery_p50": 35.807,
-    "delivery_p99": 105.599,
+    "events_per_sec": 64053.333333333336,
+    "delivery_p50": 36.735,
+    "delivery_p99": 68.991,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -165,15 +165,15 @@
     "writer_rate": 2,
     "read_rate": 0,
     "write_ops_per_sec": 4066.6666666666665,
-    "write_p50": 1.67,
-    "write_p99": 121.151,
+    "write_p50": 1.704,
+    "write_p99": 146.687,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 3336.4666666666667,
-    "delivery_p50": 1.011,
-    "delivery_p99": 137.471,
+    "events_per_sec": 4000.0,
+    "delivery_p50": 1.015,
+    "delivery_p99": 147.327,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -190,16 +190,16 @@
     "subscribers": 2000,
     "writer_rate": 8,
     "read_rate": 0,
-    "write_ops_per_sec": 16048.966666666667,
-    "write_p50": 1.693,
-    "write_p99": 58.143,
+    "write_ops_per_sec": 16051.533333333333,
+    "write_p50": 1.799,
+    "write_p99": 53.471,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 15944.433333333332,
-    "delivery_p50": 1.063,
-    "delivery_p99": 54.175,
+    "events_per_sec": 15946.133333333333,
+    "delivery_p50": 1.078,
+    "delivery_p99": 51.135,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -216,16 +216,16 @@
     "subscribers": 2000,
     "writer_rate": 20,
     "read_rate": 0,
-    "write_ops_per_sec": 39977.566666666666,
-    "write_p50": 2.251,
-    "write_p99": 135.807,
+    "write_ops_per_sec": 39980.7,
+    "write_p50": 2.363,
+    "write_p99": 131.071,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 33261.933333333334,
-    "delivery_p50": 1.437,
-    "delivery_p99": 86.079,
+    "events_per_sec": 33258.73333333333,
+    "delivery_p50": 1.517,
+    "delivery_p99": 85.567,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
@@ -242,16 +242,16 @@
     "subscribers": 2000,
     "writer_rate": 33,
     "read_rate": 0,
-    "write_ops_per_sec": 65915.2,
-    "write_p50": 10.119,
-    "write_p99": 262.399,
+    "write_ops_per_sec": 65920.33333333333,
+    "write_p50": 10.735,
+    "write_p99": 304.383,
     "read_ops_per_sec": 0.0,
     "read_mib_per_sec": 0.0,
     "read_p50": null,
     "read_p99": null,
-    "events_per_sec": 54853.333333333336,
-    "delivery_p50": 10.063,
-    "delivery_p99": 107.071,
+    "events_per_sec": 65681.7,
+    "delivery_p50": 10.279,
+    "delivery_p99": 91.519,
     "write_bp": 0,
     "write_err": 0,
     "read_bp": 0,
diff --git a/results/canonical-mixed-delivery/memory/cells.json b/results/canonical-mixed-delivery/memory/cells.json
index 0f33627..c36b143 100644
--- a/results/canonical-mixed-delivery/memory/cells.json
+++ b/results/canonical-mixed-delivery/memory/cells.json
@@ -7,24 +7,24 @@
       "levels": {
         "2": {
           "write_ops_per_sec": 4066.6666666666665,
-          "write_p50": 1.682,
-          "write_p99": 129.407,
+          "write_p50": 1.705,
+          "write_p99": 122.943,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 3341.3333333333335,
-          "delivery_p50": 0.924,
-          "delivery_p99": 150.655,
+          "events_per_sec": 3339.0,
+          "delivery_p50": 0.929,
+          "delivery_p99": 139.519,
           "write_ok": 122000,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 100240,
-          "control_events_received": 102240,
-          "elapsed_secs": 35.314730835,
+          "events_received": 100170,
+          "control_events_received": 102170,
+          "elapsed_secs": 35.265945261,
           "drive_secs": 30.0,
           "level": 2,
           "readers": 0,
@@ -35,25 +35,25 @@
           "reason": "complete"
         },
         "8": {
-          "write_ops_per_sec": 16047.333333333334,
-          "write_p50": 1.654,
-          "write_p99": 3.761,
+          "write_ops_per_sec": 16051.533333333333,
+          "write_p50": 1.799,
+          "write_p99": 53.471,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 13305.3,
-          "delivery_p50": 0.954,
-          "delivery_p99": 5.063,
-          "write_ok": 481420,
+          "events_per_sec": 15946.133333333333,
+          "delivery_p50": 1.078,
+          "delivery_p99": 51.135,
+          "write_ok": 481546,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 399159,
-          "control_events_received": 401159,
-          "elapsed_secs": 35.198380154,
+          "events_received": 478384,
+          "control_events_received": 480384,
+          "elapsed_secs": 30.248419928,
           "drive_secs": 30.0,
           "level": 8,
           "readers": 0,
@@ -64,25 +64,25 @@
           "reason": "complete"
         },
         "20": {
-          "write_ops_per_sec": 39984.833333333336,
-          "write_p50": 1.822,
-          "write_p99": 3.033,
+          "write_ops_per_sec": 39976.4,
+          "write_p50": 1.925,
+          "write_p99": 37.727,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 33226.433333333334,
-          "delivery_p50": 1.09,
-          "delivery_p99": 2.333,
-          "write_ok": 1199545,
+          "events_per_sec": 39816.73333333333,
+          "delivery_p50": 1.111,
+          "delivery_p99": 4.515,
+          "write_ok": 1199292,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 996793,
-          "control_events_received": 998793,
-          "elapsed_secs": 35.333831543,
+          "events_received": 1194502,
+          "control_events_received": 1196502,
+          "elapsed_secs": 30.227035602,
           "drive_secs": 30.0,
           "level": 20,
           "readers": 0,
@@ -93,25 +93,25 @@
           "reason": "complete"
         },
         "33": {
-          "write_ops_per_sec": 65920.43333333333,
-          "write_p50": 2.101,
-          "write_p99": 93.759,
+          "write_ops_per_sec": 65893.53333333334,
+          "write_p50": 2.189,
+          "write_p99": 63.167,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 65691.26666666666,
-          "delivery_p50": 1.214,
-          "delivery_p99": 8.367,
-          "write_ok": 1977613,
+          "events_per_sec": 65674.93333333333,
+          "delivery_p50": 1.242,
+          "delivery_p99": 6.623,
+          "write_ok": 1976806,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 1970738,
-          "control_events_received": 1972738,
-          "elapsed_secs": 30.25392982,
+          "events_received": 1970248,
+          "control_events_received": 1972248,
+          "elapsed_secs": 30.228949969,
           "drive_secs": 30.0,
           "level": 33,
           "readers": 0,
@@ -122,25 +122,25 @@
           "reason": "complete"
         },
         "0": {
-          "write_ops_per_sec": 127139.0,
-          "write_p50": 14.527,
-          "write_p99": 41.279,
+          "write_ops_per_sec": 139737.13333333333,
+          "write_p50": 9.423,
+          "write_p99": 47.615,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 126729.93333333333,
-          "delivery_p50": 12.015,
-          "delivery_p99": 45.023,
-          "write_ok": 3814170,
+          "events_per_sec": 139265.1,
+          "delivery_p50": 11.679,
+          "delivery_p99": 62.783,
+          "write_ok": 4192114,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 3801898,
-          "control_events_received": 3803898,
-          "elapsed_secs": 30.436254117,
+          "events_received": 4177953,
+          "control_events_received": 4179953,
+          "elapsed_secs": 30.269934784,
           "drive_secs": 30.0,
           "level": 0,
           "readers": 0,
diff --git a/results/canonical-mixed-delivery/report.md b/results/canonical-mixed-delivery/report.md
index 471e9f5..29a94f6 100644
--- a/results/canonical-mixed-delivery/report.md
+++ b/results/canonical-mixed-delivery/report.md
@@ -6,21 +6,21 @@ Sweep axis: **writer_rate**. Latency cells are p50/p99 ms. ‡ = backpressure (5
 
 | rate/writer | write ops/s | write ms | read ops/s | read MiB/s | read ms | deliv rec/s | deliv ms | status |
 |---|---|---|---|---|---|---|---|---|
-| 2 | 4067 | 1.7/121.2 | 0 | 0.0 | — | 3336 | 1.0/137.5 | ok |
-| 8 | 16049 | 1.7/58.1 | 0 | 0.0 | — | 15944 | 1.1/54.2 | ok |
-| 20 | 39978 | 2.3/135.8 | 0 | 0.0 | — | 33262 | 1.4/86.1 | ok |
-| 33 | 65915 | 10.1/262.4 | 0 | 0.0 | — | 54853 | 10.1/107.1 | ok |
-| max | 85168 | 21.9/95.9 | 0 | 0.0 | — | 63848 | 35.8/105.6 | ok |
+| 2 | 4067 | 1.7/146.7 | 0 | 0.0 | — | 4000 | 1.0/147.3 | ok |
+| 8 | 16052 | 1.8/53.5 | 0 | 0.0 | — | 15946 | 1.1/51.1 | ok |
+| 20 | 39981 | 2.4/131.1 | 0 | 0.0 | — | 33259 | 1.5/85.6 | ok |
+| 33 | 65920 | 10.7/304.4 | 0 | 0.0 | — | 65682 | 10.3/91.5 | ok |
+| max | 84265 | 22.4/70.5 | 0 | 0.0 | — | 64053 | 36.7/69.0 | ok |
 
 ## memory — 2000 streams
 
 | rate/writer | write ops/s | write ms | read ops/s | read MiB/s | read ms | deliv rec/s | deliv ms | status |
 |---|---|---|---|---|---|---|---|---|
-| 2 | 4067 | 1.7/129.4 | 0 | 0.0 | — | 3341 | 0.9/150.7 | ok |
-| 8 | 16047 | 1.7/3.8 | 0 | 0.0 | — | 13305 | 1.0/5.1 | ok |
-| 20 | 39985 | 1.8/3.0 | 0 | 0.0 | — | 33226 | 1.1/2.3 | ok |
-| 33 | 65920 | 2.1/93.8 | 0 | 0.0 | — | 65691 | 1.2/8.4 | ok |
-| max | 127139 | 14.5/41.3 | 0 | 0.0 | — | 126730 | 12.0/45.0 | ok |
+| 2 | 4067 | 1.7/122.9 | 0 | 0.0 | — | 3339 | 0.9/139.5 | ok |
+| 8 | 16052 | 1.8/53.5 | 0 | 0.0 | — | 15946 | 1.1/51.1 | ok |
+| 20 | 39976 | 1.9/37.7 | 0 | 0.0 | — | 39817 | 1.1/4.5 | ok |
+| 33 | 65894 | 2.2/63.2 | 0 | 0.0 | — | 65675 | 1.2/6.6 | ok |
+| max | 139737 | 9.4/47.6 | 0 | 0.0 | — | 139265 | 11.7/62.8 | ok |
 
 ## Findings
 
diff --git a/results/canonical-mixed-delivery/wal/cells.json b/results/canonical-mixed-delivery/wal/cells.json
index aeec4a7..9eb8a2a 100644
--- a/results/canonical-mixed-delivery/wal/cells.json
+++ b/results/canonical-mixed-delivery/wal/cells.json
@@ -7,24 +7,24 @@
       "levels": {
         "2": {
           "write_ops_per_sec": 4066.6666666666665,
-          "write_p50": 1.67,
-          "write_p99": 121.151,
+          "write_p50": 1.704,
+          "write_p99": 146.687,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 3336.4666666666667,
-          "delivery_p50": 1.011,
-          "delivery_p99": 137.471,
+          "events_per_sec": 4000.0,
+          "delivery_p50": 1.015,
+          "delivery_p99": 147.327,
           "write_ok": 122000,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 100094,
-          "control_events_received": 102094,
-          "elapsed_secs": 35.276377325,
+          "events_received": 120000,
+          "control_events_received": 122000,
+          "elapsed_secs": 30.347085596,
           "drive_secs": 30.0,
           "level": 2,
           "readers": 0,
@@ -35,25 +35,25 @@
           "reason": "complete"
         },
         "8": {
-          "write_ops_per_sec": 16048.966666666667,
-          "write_p50": 1.693,
-          "write_p99": 58.143,
+          "write_ops_per_sec": 16051.533333333333,
+          "write_p50": 1.799,
+          "write_p99": 53.471,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 15944.433333333332,
-          "delivery_p50": 1.063,
-          "delivery_p99": 54.175,
-          "write_ok": 481469,
+          "events_per_sec": 15946.133333333333,
+          "delivery_p50": 1.078,
+          "delivery_p99": 51.135,
+          "write_ok": 481546,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 478333,
-          "control_events_received": 480333,
-          "elapsed_secs": 30.420944699,
+          "events_received": 478384,
+          "control_events_received": 480384,
+          "elapsed_secs": 30.248419928,
           "drive_secs": 30.0,
           "level": 8,
           "readers": 0,
@@ -64,25 +64,25 @@
           "reason": "complete"
         },
         "20": {
-          "write_ops_per_sec": 39977.566666666666,
-          "write_p50": 2.251,
-          "write_p99": 135.807,
+          "write_ops_per_sec": 39980.7,
+          "write_p50": 2.363,
+          "write_p99": 131.071,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 33261.933333333334,
-          "delivery_p50": 1.437,
-          "delivery_p99": 86.079,
-          "write_ok": 1199327,
+          "events_per_sec": 33258.73333333333,
+          "delivery_p50": 1.517,
+          "delivery_p99": 85.567,
+          "write_ok": 1199421,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 997858,
-          "control_events_received": 999858,
-          "elapsed_secs": 35.153495591,
+          "events_received": 997762,
+          "control_events_received": 999762,
+          "elapsed_secs": 35.139238977,
           "drive_secs": 30.0,
           "level": 20,
           "readers": 0,
@@ -93,25 +93,25 @@
           "reason": "complete"
         },
         "33": {
-          "write_ops_per_sec": 65915.2,
-          "write_p50": 10.119,
-          "write_p99": 262.399,
+          "write_ops_per_sec": 65920.33333333333,
+          "write_p50": 10.735,
+          "write_p99": 304.383,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 54853.333333333336,
-          "delivery_p50": 10.063,
-          "delivery_p99": 107.071,
-          "write_ok": 1977456,
+          "events_per_sec": 65681.7,
+          "delivery_p50": 10.279,
+          "delivery_p99": 91.519,
+          "write_ok": 1977610,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 1645600,
-          "control_events_received": 1647600,
-          "elapsed_secs": 35.307107715,
+          "events_received": 1970451,
+          "control_events_received": 1972451,
+          "elapsed_secs": 30.229286462,
           "drive_secs": 30.0,
           "level": 33,
           "readers": 0,
@@ -122,25 +122,25 @@
           "reason": "complete"
         },
         "0": {
-          "write_ops_per_sec": 85168.3,
-          "write_p50": 21.935,
-          "write_p99": 95.871,
+          "write_ops_per_sec": 84265.16666666667,
+          "write_p50": 22.399,
+          "write_p99": 70.463,
           "read_ops_per_sec": 0.0,
           "read_mib_per_sec": 0.0,
           "read_p50": null,
           "read_p99": null,
-          "events_per_sec": 63848.26666666667,
-          "delivery_p50": 35.807,
-          "delivery_p99": 105.599,
-          "write_ok": 2555049,
+          "events_per_sec": 64053.333333333336,
+          "delivery_p50": 36.735,
+          "delivery_p99": 68.991,
+          "write_ok": 2527955,
           "write_bp": 0,
           "write_err": 0,
           "read_ok": 0,
           "read_bp": 0,
           "read_err": 0,
-          "events_received": 1915448,
-          "control_events_received": 1917448,
-          "elapsed_secs": 35.193152446,
+          "events_received": 1921600,
+          "control_events_received": 1923600,
+          "elapsed_secs": 35.127652508,
           "drive_secs": 30.0,
           "level": 0,
           "readers": 0,
diff --git a/results/canonical-write/aggregate.csv b/results/canonical-write/aggregate.csv
index 0cc48fe..4c4a70a 100644
--- a/results/canonical-write/aggregate.csv
+++ b/results/canonical-write/aggregate.csv
@@ -1,5 +1,5 @@
 mode,stream_count,pods,throughput,p50,p99,knee_pods,knee_throughput,knee_p50,knee_p99,pod_mem_mb,pod_mem_p50_mb,saturated,status,reason
-memory,10000,8,680429.25,,,4,655795.45,1.418,3.621,298,206,False,ok,ladder_exhausted
-wal-ideal,10000,8,416986.55000000005,,,4,416986.55000000005,2.369,4.235,323,221,False,ok,ladder_exhausted
-memory,100000,8,631519.5,,,4,631519.5,1.433,3.643,714,630,False,ok,ladder_exhausted
-wal-ideal,100000,8,382296.4,,,4,382296.4,2.501,4.563,777,658,False,ok,ladder_exhausted
+memory,10000,8,669353.4,,,4,527493.35,1.78,4.471,300,216,False,ok,ladder_exhausted
+wal-ideal,10000,8,413018.9,,,4,413018.9,2.289,5.223,1572,221,False,ok,ladder_exhausted
+memory,100000,8,628237.9,,,4,531573.6,1.634,5.011,725,637,False,ok,ladder_exhausted
+wal-ideal,100000,8,385827.5,,,4,385827.5,2.457,4.651,775,650,False,ok,ladder_exhausted
diff --git a/results/canonical-write/aggregate.json b/results/canonical-write/aggregate.json
index f1139f1..92ee905 100644
--- a/results/canonical-write/aggregate.json
+++ b/results/canonical-write/aggregate.json
@@ -3,30 +3,30 @@
     "mode": "memory",
     "stream_count": 10000,
     "pods": 8,
-    "throughput": 680429.25,
+    "throughput": 669353.4,
     "p50": null,
     "p99": null,
     "knee_pods": 4,
-    "knee_throughput": 655795.45,
-    "knee_p50": 1.418,
-    "knee_p99": 3.621,
-    "pod_mem_mb": 298,
-    "pod_mem_p50_mb": 206,
+    "knee_throughput": 527493.35,
+    "knee_p50": 1.78,
+    "knee_p99": 4.471,
+    "pod_mem_mb": 300,
+    "pod_mem_p50_mb": 216,
     "saturated": false,
     "status": "ok",
     "reason": "ladder_exhausted",
     "walk": [
       [
         4,
-        655795.45,
-        1.418,
-        3.621
+        527493.35,
+        1.78,
+        4.471
       ],
       [
         8,
-        680429.25,
-        2.753,
-        6.475
+        669353.4,
+        2.801,
+        7.087
       ]
     ]
   },
@@ -34,14 +34,14 @@
     "mode": "wal-ideal",
     "stream_count": 10000,
     "pods": 8,
-    "throughput": 416986.55000000005,
+    "throughput": 413018.9,
     "p50": null,
     "p99": null,
     "knee_pods": 4,
-    "knee_throughput": 416986.55000000005,
-    "knee_p50": 2.369,
-    "knee_p99": 4.235,
-    "pod_mem_mb": 323,
+    "knee_throughput": 413018.9,
+    "knee_p50": 2.289,
+    "knee_p99": 5.223,
+    "pod_mem_mb": 1572,
     "pod_mem_p50_mb": 221,
     "saturated": false,
     "status": "ok",
@@ -49,15 +49,15 @@
     "walk": [
       [
         4,
-        416986.55000000005,
-        2.369,
-        4.235
+        413018.9,
+        2.289,
+        5.223
       ],
       [
         8,
-        399101.1500000001,
-        4.999,
-        8.231
+        398629.65,
+        5.015,
+        8.287
       ]
     ]
   },
@@ -65,30 +65,30 @@
     "mode": "memory",
     "stream_count": 100000,
     "pods": 8,
-    "throughput": 631519.5,
+    "throughput": 628237.9,
     "p50": null,
     "p99": null,
     "knee_pods": 4,
-    "knee_throughput": 631519.5,
-    "knee_p50": 1.433,
-    "knee_p99": 3.643,
-    "pod_mem_mb": 714,
-    "pod_mem_p50_mb": 630,
+    "knee_throughput": 531573.6,
+    "knee_p50": 1.634,
+    "knee_p99": 5.011,
+    "pod_mem_mb": 725,
+    "pod_mem_p50_mb": 637,
     "saturated": false,
     "status": "ok",
     "reason": "ladder_exhausted",
     "walk": [
       [
         4,
-        631519.5,
-        1.433,
-        3.643
+        531573.6,
+        1.634,
+        5.011
       ],
       [
         8,
-        621656.3,
-        2.865,
-        7.031
+        628237.9,
+        2.997,
+        6.863
       ]
     ]
   },
@@ -96,30 +96,30 @@
     "mode": "wal-ideal",
     "stream_count": 100000,
     "pods": 8,
-    "throughput": 382296.4,
+    "throughput": 385827.5,
     "p50": null,
     "p99": null,
     "knee_pods": 4,
-    "knee_throughput": 382296.4,
-    "knee_p50": 2.501,
-    "knee_p99": 4.563,
-    "pod_mem_mb": 777,
-    "pod_mem_p50_mb": 658,
+    "knee_throughput": 385827.5,
+    "knee_p50": 2.457,
+    "knee_p99": 4.651,
+    "pod_mem_mb": 775,
+    "pod_mem_p50_mb": 650,
     "saturated": false,
     "status": "ok",
     "reason": "ladder_exhausted",
     "walk": [
       [
         4,
-        382296.4,
-        2.501,
-        4.563
+        385827.5,
+        2.457,
+        4.651
       ],
       [
         8,
-        364593.49999999994,
-        5.307,
-        8.647
+        363791.00000000006,
+        5.315,
+        8.831
       ]
     ]
   }
diff --git a/results/canonical-write/memory/cells.json b/results/canonical-write/memory/cells.json
index 84f128f..7530e78 100644
--- a/results/canonical-write/memory/cells.json
+++ b/results/canonical-write/memory/cells.json
@@ -6,26 +6,26 @@
       "walk": [
         [
           4,
-          655795.45,
-          1.418,
-          3.621
+          527493.35,
+          1.78,
+          4.471
         ],
         [
           8,
-          680429.25,
-          2.753,
-          6.475
+          669353.4,
+          2.801,
+          7.087
         ]
       ],
       "pinned_pods": 8,
-      "throughput": 680429.25,
+      "throughput": 669353.4,
       "p50": null,
       "p99": null,
-      "pod_mem_mb": 298,
+      "pod_mem_mb": 300,
       "saturated": false,
       "status": "ok",
       "reason": "ladder_exhausted",
-      "pod_mem_p50_mb": 206
+      "pod_mem_p50_mb": 216
     },
     "100000": {
       "stream_count": 100000,
@@ -33,26 +33,26 @@
       "walk": [
         [
           4,
-          631519.5,
-          1.433,
-          3.643
+          531573.6,
+          1.634,
+          5.011
         ],
         [
           8,
-          621656.3,
-          2.865,
-          7.031
+          628237.9,
+          2.997,
+          6.863
         ]
       ],
       "pinned_pods": 8,
-      "throughput": 621656.3,
+      "throughput": 628237.9,
       "p50": null,
       "p99": null,
-      "pod_mem_mb": 714,
+      "pod_mem_mb": 725,
       "saturated": false,
       "status": "ok",
       "reason": "ladder_exhausted",
-      "pod_mem_p50_mb": 630
+      "pod_mem_p50_mb": 637
     }
   }
 }
\ No newline at end of file
diff --git a/results/canonical-write/report.md b/results/canonical-write/report.md
index ea1f3f8..549bf7e 100644
--- a/results/canonical-write/report.md
+++ b/results/canonical-write/report.md
@@ -4,8 +4,8 @@
 
 | streams | wal-ideal | memory |
 |---|---|---|
-| 10000 | 417k† | 680k† |
-| 100000 | 382k† | 632k† |
+| 10000 | 413k† | 669k† |
+| 100000 | 386k† | 628k† |
 
 † = not saturated (ladder exhausted) — treat as a lower bound.
 
@@ -13,8 +13,8 @@
 
 | streams | wal-ideal | memory |
 |---|---|---|
-| 10000 | 323 / 221 | 298 / 206 |
-| 100000 | 777 / 658 | 714 / 630 |
+| 10000 | 1572 / 221 | 300 / 216 |
+| 100000 | 775 / 650 | 725 / 637 |
 
 _Pod working set = cgroup `memory.current − inactive_file` (anon + active page cache), sampled each second at the pinned rung. **peak** = high-water (catches bursts like an in-RAM Raft log filling); **p50** = median (what the server steadily holds resident). peak ≈ p50 ⇒ steadily resident; peak ≫ p50 ⇒ transient spikes._
 
@@ -22,17 +22,17 @@ _Pod working set = cgroup `memory.current − inactive_file` (anon + active page
 
 | streams | wal-ideal @≤80% load | wal-ideal @saturation | memory @≤80% load | memory @saturation |
 |---|---|---|---|---|
-| 10000 | 2.4 / 4.2 (417k @4p) | — | 1.4 / 3.6 (656k @4p) | — |
-| 100000 | 2.5 / 4.6 (382k @4p) | — | 1.4 / 3.6 (632k @4p) | — |
+| 10000 | 2.3 / 5.2 (413k @4p) | — | 1.8 / 4.5 (527k @4p) | — |
+| 100000 | 2.5 / 4.7 (386k @4p) | — | 1.6 / 5.0 (532k @4p) | — |
 
 _@≤80% load = the largest ladder rung at ≤80% of peak throughput — the server's service latency with headroom. @saturation = the pinned plateau rung, where a closed-loop fleet measures its own queueing (≈ in-flight ÷ ceiling by Little's law), NOT the server's per-request cost. Compare against the unloaded single-request baseline (~1 ms for wal) before reading anything into large saturation values._
 
 ## Saturation walks (pods → ops/s, p50 ms)
 
-- **memory 10000**: 4:656k@1.4ms → 8:680k@2.8ms  (pinned 8, ladder_exhausted)
-- **wal-ideal 10000**: 4:417k@2.4ms → 8:399k@5.0ms  (pinned 8, ladder_exhausted)
-- **memory 100000**: 4:632k@1.4ms → 8:622k@2.9ms  (pinned 8, ladder_exhausted)
-- **wal-ideal 100000**: 4:382k@2.5ms → 8:365k@5.3ms  (pinned 8, ladder_exhausted)
+- **memory 10000**: 4:527k@1.8ms → 8:669k@2.8ms  (pinned 8, ladder_exhausted)
+- **wal-ideal 10000**: 4:413k@2.3ms → 8:399k@5.0ms  (pinned 8, ladder_exhausted)
+- **memory 100000**: 4:532k@1.6ms → 8:628k@3.0ms  (pinned 8, ladder_exhausted)
+- **wal-ideal 100000**: 4:386k@2.5ms → 8:364k@5.3ms  (pinned 8, ladder_exhausted)
 
 ## Findings
 
diff --git a/results/canonical-write/wal-ideal/cells.json b/results/canonical-write/wal-ideal/cells.json
index b0ccc66..1465a9f 100644
--- a/results/canonical-write/wal-ideal/cells.json
+++ b/results/canonical-write/wal-ideal/cells.json
@@ -6,22 +6,22 @@
       "walk": [
         [
           4,
-          416986.55000000005,
-          2.369,
-          4.235
+          413018.9,
+          2.289,
+          5.223
         ],
         [
           8,
-          399101.1500000001,
-          4.999,
-          8.231
+          398629.65,
+          5.015,
+          8.287
         ]
       ],
       "pinned_pods": 8,
-      "throughput": 399101.1500000001,
+      "throughput": 398629.65,
       "p50": null,
       "p99": null,
-      "pod_mem_mb": 323,
+      "pod_mem_mb": 1572,
       "saturated": false,
       "status": "ok",
       "reason": "ladder_exhausted",
@@ -33,26 +33,26 @@
       "walk": [
         [
           4,
-          382296.4,
-          2.501,
-          4.563
+          385827.5,
+          2.457,
+          4.651
         ],
         [
           8,
-          364593.49999999994,
-          5.307,
-          8.647
+          363791.00000000006,
+          5.315,
+          8.831
         ]
       ],
       "pinned_pods": 8,
-      "throughput": 364593.49999999994,
+      "throughput": 363791.00000000006,
       "p50": null,
       "p99": null,
-      "pod_mem_mb": 777,
+      "pod_mem_mb": 775,
       "saturated": false,
       "status": "ok",
       "reason": "ladder_exhausted",
-      "pod_mem_p50_mb": 658
+      "pod_mem_p50_mb": 650
     }
   }
 }
\ No newline at end of file