diff --git a/editions/catalog.yaml b/editions/catalog.yaml
index ca2faad..09eb771 100644
--- a/editions/catalog.yaml
+++ b/editions/catalog.yaml
@@ -3,7 +3,7 @@
 # clay-borg: pin by variant_id → path (+ optional git_pin).
 
 schema_version: 1
-updated: "2026-08-07"
+updated: "2026-08-08"
 default_variant: ground-darvo-r0
 
 packages:
@@ -24,9 +24,9 @@ packages:
     rules_delta: null
     changed_files: []
     utility_estimate: >
-      Ship-default content package. Modes differentiate; RPT-0003 shows
-      ATTACK/DARVO irrelevant under competent play — known gap, not a
-      reason to un-pin until a successor is accepted.
+      Ship-default. RPT-0003 + CB-EV-0031: under non-attacking competent
+      policies, peak Stress held never exceeds start 2 — ATTACK is the
+      sole inbound pressure. Keep pinned until a successor is accepted.
     decision: none
     git_pin: null
     clay_borg_notes: >
@@ -38,7 +38,7 @@ packages:
     kind: experiment
     base: ground-darvo-r0
     selectable: true
-    status: experimental
+    status: measured
     dataset_id: GROUND-DARVO-EXP-H1-0.1
     title: "H1 — problem pressure + high-stress ATTACK self-soothe"
     summary: >
@@ -47,19 +47,20 @@ packages:
       at Stress ≥4 gives that seat −1 Stress. Thresholds/deal unchanged.
     hypothesis_ref: history/260807-attack-darvo-stress-design.md
     workplan_ref: workplans/GROUND-WP-0006-h1-problem-stress-experiment.md
+    measurement_ref: reports/260808-clay-borg-h1-measured.md
     rules_delta: editions/experiments/h1-problem-stress/rules_delta.yaml
     changed_files:
       - Actions.csv
       - Rules_Text.csv
       - metadata.json
     utility_estimate: >
-      Unmeasured. Expected: non-zero DARVO arm rate; ATTACK sometimes
-      rational at Stress ≥4; always-ATTACK still bad. Update after
-      clay-borg attack-value / difficulty-style panel on this variant_id.
-    decision: none
+      Measured 2026-08-08 (CB-EV-0030/0031; instrument caveat applies).
+      Direction right, magnitude wrong: H1-A is a solve-rate tax that
+      competent seats absorb with GROUND (Stress ~3); H1-B never fires
+      for them. DARVO arms for unregulated seats; group wins collapse
+      to 0 at 3p+ under greedy SHARED GROUND. Do not promote as-is.
+    decision: reject-as-baseline
+    # Package stays selectable for regression compare; not a ship pin.
     git_pin: null
     clay_borg_notes: >
-      Inherit problem/solution/mode/token data from base ground-darvo-r0
-      unless overridden. MUST implement rules_delta.yaml H1-A and H1-B
-      in the kernel (or a variant feature flag). CSV text alone is not
-      executable in the current engine.
+      Kernel implements H1-A/H1-B. Keep for A/B against successors (H2…).
diff --git a/editions/experiments/h1-problem-stress/VARIANT.md b/editions/experiments/h1-problem-stress/VARIANT.md
index 47e89e3..f4b4b02 100644
--- a/editions/experiments/h1-problem-stress/VARIANT.md
+++ b/editions/experiments/h1-problem-stress/VARIANT.md
@@ -4,7 +4,8 @@
 |---|---|
 | **variant_id** | `h1-problem-stress` |
 | **base** | `ground-darvo-r0` |
-| **status** | experimental (not baseline) |
+| **status** | measured — reject as baseline (2026-08-08); keep for A/B |
+| **measurement** | [`../../../reports/260808-clay-borg-h1-measured.md`](../../../reports/260808-clay-borg-h1-measured.md) |
 | **catalog** | [`../../catalog.yaml`](../../catalog.yaml) |
 | **design note** | [`../../../history/260807-attack-darvo-stress-design.md`](../../../history/260807-attack-darvo-stress-design.md) |
 | **workplan** | [`../../../workplans/GROUND-WP-0006-h1-problem-stress-experiment.md`](../../../workplans/GROUND-WP-0006-h1-problem-stress-experiment.md) |
diff --git a/editions/ground-darvo-r0/PROVENANCE.md b/editions/ground-darvo-r0/PROVENANCE.md
index 71204d6..2a20d73 100644
--- a/editions/ground-darvo-r0/PROVENANCE.md
+++ b/editions/ground-darvo-r0/PROVENANCE.md
@@ -58,11 +58,11 @@ the adversarial review ([CB-REV-0001](../../reviews/CB-REV-0001-h1.md))
 reported it unverified and it was a real gap.
 
 ```
-sha256  eb21fa3237637790fef601fe6668a190a549715e9a78b7dfe47b40cd069b648e  ../catalog.yaml
+sha256  499f2df11612fc57123e9016cebe753fb33cea85cf6f68f5af5186327158605c  ../catalog.yaml
 sha256  f58e81f84ea2b0d16e39932261eb3f3d9890345cdf37ad6f0b3abc00636840be  ../experiments/h1-problem-stress/rules_delta.yaml
 sha256  7b1cc0149122b855e827bc930576ed165bf7dd8d62707e845a9e514ce3521f8e  ../experiments/h1-problem-stress/Actions.csv
 sha256  62785f5e7e245c60171624d15de2f40187a44fec54f93c7d9705cf52584b1078  ../experiments/h1-problem-stress/Rules_Text.csv
-sha256  002e3adf2d038579f2803975d8c6344e2b77ee9da9eaaa1b52c8bd1666bb5201  ../experiments/h1-problem-stress/VARIANT.md
+sha256  b2714210c142f1d6d5bed8f9a795019e51829c627f9599ac0ebfa04ef60a37a5  ../experiments/h1-problem-stress/VARIANT.md
 sha256  443199db94601cc889557e5e86823f374dbfdf875962fc84f95c01865605101c  ../experiments/h1-problem-stress/metadata.json
 ```