CB-WP-0021 T01/T02/T05: the engine plays its own data — AM-7 blocks

ADR-0011 decided it: vendor the CSV with a checked digest, read it with
a ~50-line reader, and let the hashes move.

The declaration's constraint was measured against the WRONG BUDGET. It
said a CSV crate costs 21,613 against AM-4a's 3,798 of headroom, '5.7x
over, settled by measurement'. But setup and problem_priorities are
cfg(scenarios) and are not in the shipped runtime at all, so AM-4a never
sees them. Against AM-4b, csv costs 17,651 against 19,742 -- it FITS,
with 2,091 to spare. It is refused anyway, on proportion: 89% of the
budget's remaining capacity to read 20 rows. The revisit condition is
stated (nested quoting, embedded newlines, multiple dialects).

GR-S01 now deals Surface + hidden 1..=k as ruled, with edition values and
suits. Measured: 6/9/12 available against thresholds 5/7/9 -- the game is
winnable at every seat count, which is what the maintainer could not do.
gd0001 is INVERTED, not deleted, and now also asserts the 6/9/12 so a
deal that is reachable for the wrong reason still fails.

Blast radius was scenario expectations, exactly as the ADR predicted: no
scenario pinned a hash and no bundle is committed. Six scenarios and two
unit tests updated, each with a note. gr-e01-threshold-unreachable-2p is
RENAMED to -reachable- and rewritten as the non-provisional import check
ground-game asked for by name. gr-e03's setup was restructured, not just
renumbered: with values 2,2,2 its personal-edge test would have tied
three ways and asserted nothing.

BLOCKING: AM-7 fails at median 0.845 against its 0.9 floor. Isolated
across three runs -- 3 problems + stand-in 0.97, 3 problems + edition
0.909, 4 problems + edition 0.845. State is BOUNDED (proven: identical
after 5k and 100k events), so this is not the unbounded-growth defect
AM-7 exists to catch; it is a bigger working set streaming a long log.
Whether AM-7's floor is still right for a larger aggregate is a spec
question and lowering it requires an ADR, so it is not being tuned here.

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

scenarios/ground/gr-a02-solve.yaml

@@ -11,8 +11,8 @@ setup:
   preset: standard-3p
   patch:
     "lead": 0
-    "players.0.hand": [{ suit: Clarify }]
-    "players.1.hand": [{ suit: Clarify }]
+    "players.0.hand": [{ suit: Repair }]
+    "players.1.hand": [{ suit: Repair }]
 commands:
   - actor: P1
     cmd: select_action
@@ -39,5 +39,5 @@ expect:
     "problems.1.claimed_by": 0
     "players.0.hand": []
     # GR-A02: P2 resolved second, so its Solution is not spent.
-    "players.1.hand": [{ suit: Clarify }]
+    "players.1.hand": [{ suit: Repair }]
   rejects: []

scenarios/ground/gr-e01-threshold-reachable-2p.yaml

@@ -0,0 +1,66 @@
+scenario: ground/gr-e01-threshold-reachable-2p
+description: >
+  GR-E01's threshold against the EDITION's Problem values, at the
+  2-player boundary — the tightest band. Rewritten from
+  `gr-e01-threshold-unreachable-2p` on ground-game's ruling of
+  2026-08-04, which called the old gap "not a design gap" and asked for
+  "a non-provisional import/fixture check: for every seat band,
+  sum(point_value of dealt Problems) >= threshold".
+
+  The old scenario recorded a real defect: the engine dealt Surface +
+  (N-1) hidden, worth 3/6/10 against thresholds of 5/7/9, and a
+  maintainer could not win a 3-player game. GR-S01 was then ruled as
+  Surface + hidden 1..=k, giving 6/9/12. It is renamed rather than
+  deleted, because the record of why the numbers changed is worth more
+  than a clean directory.
+
+  At 2p the deal is Surface(Repair,2) + hidden 1(Clarify,2) +
+  hidden 2(Boundary,2) = 6 against a threshold of 5. Reachable, and
+  ground-game kept it unforgiving on purpose: any TWO Problems sum to 4,
+  so success needs a full clear.
+covers: [GR-E01, GR-E02, GR-O01]
+provisional: false
+seed: 42
+setup:
+  players: 2
+  preset: standard-2p
+  patch:
+    "round": 5
+    "mode": SharedGround
+    # A full clear: all three dealt Problems claimed. Anything less than
+    # all three cannot reach 5, which is the point of the band.
+    "problems.1.claimed_by": 0
+    "problems.2.claimed_by": 1
+    "problems.2.face_up": true
+    "problems.3.claimed_by": 0
+    "problems.3.face_up": true
+commands:
+  - actor: P1
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P2
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: SYSTEM
+    cmd: reveal
+  - actor: P1
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: P2
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: SYSTEM
+    cmd: resolve
+  - actor: SYSTEM
+    cmd: end_round
+expect:
+  events:
+    - kind: GameEnded
+  state:
+    # 2 + 2 + 2 = 6, the maximum a 2-player game can score, against 5.
+    "outcome.total": 6
+    "outcome.threshold": 5
+    "outcome.group_success": true
+    "round": 5
+    "step": End
+  rejects: []

scenarios/ground/gr-e01-threshold-unreachable-2p.yaml

@@ -1,53 +0,0 @@
-scenario: ground/gr-e01-threshold-unreachable-2p
-description: >
-  GR-E01's threshold against the standard preset's Problem values, at the
-  2-player boundary. Both Problems are claimed — the best case available
-  — and the total is 3 against a threshold of 5. With the placeholder
-  fixture (value = priority) group success is unreachable at 2, 3 and 4
-  players; only 5–6p can reach its 9. Recorded here so the gap has a
-  failing-in-fact scenario rather than a paragraph, and marked provisional
-  because the fixture is explicitly a stand-in for scenario Problem data.
-covers: [GR-E01, GR-E02, GR-O01]
-provisional: true
-provisional_owner: ground-game
-provisional_raised: 2026-08-01
-seed: 42
-setup:
-  players: 2
-  preset: standard-2p
-  patch:
-    "round": 5
-    "mode": SharedGround
-    "problems.1.claimed_by": 0
-    "problems.2.claimed_by": 1
-    "problems.2.face_up": true
-commands:
-  - actor: P1
-    cmd: select_action
-    args: { action: GROUND }
-  - actor: P2
-    cmd: select_action
-    args: { action: GROUND }
-  - actor: SYSTEM
-    cmd: reveal
-  - actor: P1
-    cmd: choose_ground_mode
-    args: { mode: GR }
-  - actor: P2
-    cmd: choose_ground_mode
-    args: { mode: GR }
-  - actor: SYSTEM
-    cmd: resolve
-  - actor: SYSTEM
-    cmd: end_round
-expect:
-  events:
-    - kind: GameEnded
-  state:
-    # 1 + 2 = 3, the maximum any 2-player game of this preset can score.
-    "outcome.total": 3
-    "outcome.threshold": 5
-    "outcome.group_success": false
-    "round": 5
-    "step": End
-  rejects: []

scenarios/ground/gr-e03-common-problem.yaml

@@ -15,11 +15,15 @@ setup:
   patch:
     "round": 5
     "mode": CommonProblem
-    # Every Problem claimed: 1+2+3+4 = 10, over the 5-6p threshold of 9.
+    # Four of the five dealt Problems claimed: 2+2+3+2 = 9, exactly the
+    # 5-6p threshold. P3 takes the 3-value Problem so the personal edge
+    # this scenario exists to test has a unique winner — with the edition
+    # values (2,2,2,3,3) an even spread would tie three ways and the test
+    # would assert nothing about GR-E03.
     "problems.1.claimed_by": 0
     "problems.2.claimed_by": 1
-    "problems.3.claimed_by": 2
-    "problems.4.claimed_by": 3
+    "problems.4.claimed_by": 2
+    "problems.3.claimed_by": 3
     "problems.2.face_up": true
     "problems.3.face_up": true
     "problems.4.face_up": true
@@ -66,11 +70,11 @@ expect:
   events:
     - kind: GameEnded
   state:
-    "outcome.total": 10
+    "outcome.total": 9
     "outcome.threshold": 9
     "outcome.group_success": true
     # GR-E03: claimed value −1 per Blame held.
-    "outcome.personal.3": 2
+    "outcome.personal.3": 0
     "outcome.personal.2": 3
     # P4 claimed 4 and still loses: the Blame is load-bearing here.
     "outcome.winners": [2]

scenarios/ground/gr-e04-coalitions.yaml

@@ -15,7 +15,8 @@ setup:
     "lead": 0
     "round": 5
     "mode": BondedCoalitions
-    # Values 1+2+3 = 6 claimed; 3p threshold is 7, so no group success.
+    # Edition values 2+2+2 = 6 claimed; 3p threshold is 7, so still no
+    # group success — the band this scenario needs is unchanged.
     "problems.1.claimed_by": 0
     "problems.2.claimed_by": 1
     "problems.3.claimed_by": 2
@@ -45,12 +46,12 @@ expect:
     "outcome.total": 6
     "outcome.group_success": false
     # P1 claimed value 1 less one Blame; P2 value 2; P3 value 3.
-    "outcome.personal.0": 0
+    "outcome.personal.0": 1
     "outcome.personal.1": 2
-    "outcome.personal.2": 3
+    "outcome.personal.2": 2
     # GR-E04: P1+P2 are Bonded; the Rivalry leaves P3 solo.
     "outcome.coalitions.0.members": [0, 1]
-    "outcome.coalitions.0.score": 2
+    "outcome.coalitions.0.score": 3
     "outcome.coalitions.1.members": [2]
-    "outcome.coalitions.1.score": 3
+    "outcome.coalitions.1.score": 2
   rejects: []

scenarios/ground/gr-f02-no-gate.yaml

@@ -12,8 +12,8 @@ setup:
     "lead": 0
     "players.0.stress": 3
     "players.1.stress": 4
-    "players.0.hand": [{ suit: Clarify }]
-    "players.1.hand": [{ suit: Clarify }]
+    "players.0.hand": [{ suit: Repair }]
+    "players.1.hand": [{ suit: Repair }]
 commands:
   # GR-F02: Stress 3 is below the gate, so SOLVE is available.
   - actor: P1

scenarios/ground/gr-p05-solve-legality.yaml

@@ -22,7 +22,7 @@ setup:
   patch:
     "lead": 1
     "players.0.hand": [{ suit: Change }]
-    "players.1.hand": [{ suit: Clarify }]
+    "players.1.hand": [{ suit: Repair }]
 commands:
   # 0 — P1 holds no Clarify: refused.
   - actor: P1