CB-WP-0038: variant selection, H1 implemented, and H1 measured

ground-game packages hypotheses as selectable rules variants — a catalog,
a rules_delta.yaml, and prose — and their note is explicit that CSV text
alone is not executable here. So the kernel gains a Variant in game state:
in the state, therefore in the hash, therefore in the recording, because a
scenario replayed under a different variant would diverge silently.

Baseline is bit-for-bit what it was, asserted across seat counts and
seeds. A variant system that perturbs the baseline invalidates every
measurement this repo has.

H1-A and H1-B implemented from rules_delta.yaml and mutation-proven on
their own defects: "unclaimed" misread as face-up-and-unsolved, and the
attacker's Stress read after the attack's effects. Their `unchanged:` list
is asserted rather than trusted — that list is their claim about their own
experiment.

Measured, and three of their four criteria fail. DARVO arm rate is still
0 under greedy; ATTACK selection does not rise and falls for the rank-75
policy; group success collapses from 165/190/200 to 0 at 3/4/6 seats.
The mechanism is not the assumed one: greedy answers the pressure by
regulating, Stress plateaus at 3, so it never reaches the gate at 4 or the
arm at 5 — H1-A acts as a solve-rate tax and H1-B is unreachable under
competent play.

A harness defect was caught before the claim: sweep discarded refused
games silently and never reported its count, so "nobody won" and "nothing
played" printed identically. Reporting H1 as unwinnable on that basis
would have been the ADR-0018 family aimed at another repo's design. All
200 games ran in every cell; the zeros are real.

Chaos d8 = 8 — the window's first override, redrew L against a structural
L, so it changed nothing. Window 3 recorded in ChaosRollHistory.

NOT REVIEWED: tier L owes a separate-agent adversarial review, and no H1
result may reach ground-game until it has run.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

editions/catalog.yaml

@@ -0,0 +1,65 @@
+# Selectable GROUND edition / rules packages.
+# Schema docs: CATALOG.md
+# clay-borg: pin by variant_id → path (+ optional git_pin).
+
+schema_version: 1
+updated: "2026-08-07"
+default_variant: ground-darvo-r0
+
+packages:
+  - variant_id: ground-darvo-r0
+    path: editions/ground-darvo-r0
+    kind: baseline
+    base: null
+    selectable: true
+    status: baseline
+    dataset_id: GROUND-DARVO-CORE-0.1
+    title: "GROUND DARVO Edition — core r0"
+    summary: >
+      Playtest baseline. Surface + hidden 1..k deal; available 6/9/12;
+      thresholds 5/7/9. Stress ledger has no problem pressure; ATTACK
+      does not self-soothe.
+    hypothesis_ref: null
+    workplan_ref: null
+    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.
+    decision: none
+    git_pin: null
+    clay_borg_notes: >
+      Vendor CSVs as today (Problems, Actions, Solutions, Modes, Tokens).
+      Kernel implements printed r0 rules.
+
+  - variant_id: h1-problem-stress
+    path: editions/experiments/h1-problem-stress
+    kind: experiment
+    base: ground-darvo-r0
+    selectable: true
+    status: experimental
+    dataset_id: GROUND-DARVO-EXP-H1-0.1
+    title: "H1 — problem pressure + high-stress ATTACK self-soothe"
+    summary: >
+      Two deltas only: (A) +1 Stress each player at Round End if any
+      Problem remains unclaimed; (B) uncancelled ACT_ATTACK by a seat
+      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
+    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
+    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.