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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
155 lines
6.3 KiB
Markdown
155 lines
6.3 KiB
Markdown
---
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id: CB-WP-0038
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kind: product
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title: "Variant selection, and H1"
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status: done
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state_hub_workstream_id: "0976d470-7ec4-446d-827e-3a79c95ae63d"
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---
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# Purpose
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```
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structural tier L (a new capability port: the kernel gains a selectable
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rules variant, so what the engine plays is no longer
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a constant)
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chaos d8 = 8 → OVERRIDE, redraw = L
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declared tier L
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```
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**Declaration 10 of chaos window 3**, and **the window's first 8**.
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The redraw returned the structural tier, so **the override changed
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nothing** — recorded in [`ChaosRollHistory.md`](../specs/ChaosRollHistory.md)
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because a roll that changes nothing is exactly the observation ADR-0017's
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retirement condition needs.
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> **Tier L owes a separate-agent adversarial review** (InnerLoop Step 2),
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> and it has **not** been done. The maintainer asked for implementation
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> directly, so the code proceeds — but **no H1 result may go to
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> `ground-game` until that review has run.** Measurement that reaches the
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> game's owner is exactly what the review exists to check.
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## What ground-game built, and what it asks of us
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`ground-game` has packaged hypothesis **H1** as a *selectable rules
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variant*, not a patch:
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- `editions/catalog.yaml` — `variant_id → path`, `default_variant: ground-darvo-r0`
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- `editions/experiments/h1-problem-stress/` — `VARIANT.md` (prose),
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`rules_delta.yaml` (machine-readable), overridden `Actions.csv` and
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`Rules_Text.csv`
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- design note `history/260807-attack-darvo-stress-design.md` with success
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criteria
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Their note is explicit about our side:
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> *"clay-borg **hardcodes** much of the rules kernel and **vendors**
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> selected CSVs. H1-A/B are **rules-kernel changes**, not Problem table
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> changes. CSV text alone is not executable in the current engine."*
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**They are right, and F25 is the same observation from our side.**
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## The two deltas
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| id | phase | rule |
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|---|---|---|
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| **H1-A** | round end | if **any** Problem in play is unclaimed (face-up unsolved, hidden, **or Denied**), **each player +1 Stress** — *before* the clamp that arms DARVO |
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| **H1-B** | attack resolution | an Attack that resolves **and is not cancelled**, by an attacker whose Stress was **≥ 4 before that Attack's effects**, gives the attacker **−1 Stress**, after target and relation effects, then clamp |
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**H1-B applies to the DARVO extra Attack too**, because it shares the
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resolution path.
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## Task: selection
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```task
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id: CB-WP-0038-T01
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status: done
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priority: high
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state_hub_task_id: "20d9c7ca-187e-44f8-96ee-7f32f948c092"
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```
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A variant is chosen, not compiled in.
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**Controls:**
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- **the variant is part of game state and reaches the recording.** A
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scenario replayed under the wrong variant would diverge silently, and
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the recording is the artifact everything else rests on;
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- **baseline is the default**, and every existing scenario replays
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byte-identically — this is the load-bearing control, because a variant
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system that perturbs the baseline invalidates every measurement we have;
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- the catalog is **vendored with a digest**, like every other borrowed
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file.
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**Done 2026-08-08.** `Variant` in `GroundState`, `#[serde(default)]` so
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every scenario written before variants existed loads as baseline — which
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is what it was. Set beside `mode`, before the hash, so a recording replays
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under the variant it was played under. `--variant` on `cb-play`.
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**`baseline_is_bit_for_bit_what_it_was`** compares state hashes across
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2/3/6 seats and eight seeds. Selecting the baseline explicitly must equal
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not selecting anything, or every measurement this repo has is invalid.
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## Task: the deltas in the kernel
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```task
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id: CB-WP-0038-T02
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status: done
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priority: high
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state_hub_task_id: "19c893b7-443f-48e4-b85a-61686df98343"
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```
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**Controls:**
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- **each delta fails on its own**, by mutation;
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- **`rules_delta.yaml`'s `unchanged:` list is asserted, not trusted** —
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deal and thresholds, SOLVE legality, Support, GROUND modes, the DARVO
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stage table, starting Stress 2, two relation slots. That list is
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ground-game's claim about their own experiment, and it is checkable;
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- **"unclaimed" includes Denied and hidden**, which is the clause a
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careless reading drops.
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**Done 2026-08-08.** Both mutation-proven on their own defect:
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| mutation | what went red |
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|---|---|
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| "unclaimed" read as *face-up and unsolved* | *"every player takes the pressure, not just some"* |
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| attacker Stress read after the attack's effects, and soothing a cancelled Attack | *"a cancelled Attack still soothed the attacker"* |
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**H1-A lands before the DARVO arm check**, per the delta's own ordering;
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applying it after would leave the pressure unable to arm anything for a
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round, which is the opposite of the hypothesis.
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**`h1_changes_nothing_it_said_it_would_not`** asserts ground-game's
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`unchanged:` list across all five seat counts — deal, thresholds, starting
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Stress 2, relation slots, mode, deck. That list is their claim about their
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own experiment, and taking it on faith is the habit CB-WP-0037 ended.
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## Task: re-run the panel
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```task
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id: CB-WP-0038-T03
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status: done
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priority: high
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state_hub_task_id: "03566bc7-2000-4a39-b8f8-c02de0a12c5a"
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```
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Their §3.2 criteria, on the same harness as RPT-0003.
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**Controls:**
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- **baseline and H1 measured by the same instrument in the same run**, or
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the comparison is between two harnesses rather than two rule sets;
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- **a single policy's numbers are not a fact about the game**
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(RetrospectiveAnalysis §4.1) — the panel is plural or there is no result;
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- **report what fails to move.** H1 under-delivering is a result their
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§6 has a branch for, and reporting only the confirming half is how a
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measurement becomes advocacy.
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**Done 2026-08-08, and the result is largely negative.** See
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[CB-EV-0030](../evidence/CB-EV-0030-h1-measured.md).
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**A harness defect was caught first, and it mattered.** The first run
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showed `won`, `atk` and `darvo` all exactly `0` at 3+ seats under H1 —
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which is the signature of games being *discarded*, not lost, because
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`sweep` had `let Ok(g) = play(..) else { continue }` and never reported
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its game count. **Reporting "H1 makes the game unwinnable" when the truth
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might have been "our harness threw every H1 game away" would have been the
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ADR-0018 family aimed at another repo's design decision.** Instrumented:
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all 200 games ran in every cell. The zeros are real.
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