CB-WP-0010-T02: GR-E03 gets a scenario

COMMON PROBLEM was the only scoring mode with no scenario — implemented
since CB-WP-0001, referenced by nothing, and would not have failed if
deleted. Five players, where the threshold is reachable at all: every
Problem claimed for a total of 10 against 9, and the winner is decided
by Blame rather than by claimed value — P4 claimed the highest Problem
and loses to P3 because two Blame tokens sit in front of them.

No defect was found on the first execution of that path, which is worth
saying plainly rather than implying the scenario was hard-won.

The assertions were mutation-checked three ways instead of trusted,
because a dot-path expectation that silently fails to resolve would
report PASS: a wrong personal score, a wrong mastery, and removing the
Blame from the fixture each turn it red.

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

facts.toml

@@ -6,7 +6,7 @@
 # `make facts-check` fails if this file disagrees with the
 # instruments, or if a tagged artifact disagrees with this file.
 
-generated = "2026-08-01"
+generated = "2026-08-02"
 pin = "fc76445"
 
 [am4a_loc]
@@ -64,8 +64,8 @@ fmt = "{:,}"
 by = "tools/rule-coverage.py"
 
 [gr_scenarios]
-value = 24
-text = "24"
+value = 25
+text = "25"
 fmt = "{:,}"
 by = "tools/rule-coverage.py"
 

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

@@ -0,0 +1,81 @@
+scenario: ground/gr-e03-common-problem
+description: >
+  COMMON PROBLEM scoring (GR-E03), the only scoring mode with no scenario
+  until CB-WP-0010 T02 — implemented since CB-WP-0001 and referenced by
+  nothing. Five players, where the threshold is actually reachable (10
+  available against 9). The group qualifies, personal scores are claimed
+  value −1 per Blame held, and the Blame is what decides the winner: P4
+  claimed the highest-value Problem and still loses to P3 because two
+  Blame tokens sit in front of them.
+covers: [GR-E03, GR-E01, GR-R09, GR-T02]
+seed: 42
+setup:
+  players: 5
+  preset: standard-5p
+  patch:
+    "round": 5
+    "mode": CommonProblem
+    # Every Problem claimed: 1+2+3+4 = 10, over the 5-6p threshold of 9.
+    "problems.1.claimed_by": 0
+    "problems.2.claimed_by": 1
+    "problems.3.claimed_by": 2
+    "problems.4.claimed_by": 3
+    "problems.2.face_up": true
+    "problems.3.face_up": true
+    "problems.4.face_up": true
+    # GR-T02: two Blame tokens in front of P4, −1 each.
+    "players.3.blame_from": [0, 1]
+commands:
+  - actor: P1
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P2
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P3
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P4
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P5
+    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: P3
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: P4
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: P5
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: SYSTEM
+    cmd: resolve
+  - actor: SYSTEM
+    cmd: end_round
+expect:
+  events:
+    - kind: GameEnded
+  state:
+    "outcome.total": 10
+    "outcome.threshold": 9
+    "outcome.group_success": true
+    # GR-E03: claimed value −1 per Blame held.
+    "outcome.personal.3": 2
+    "outcome.personal.2": 3
+    # P4 claimed 4 and still loses: the Blame is load-bearing here.
+    "outcome.winners": [2]
+    # GR-E03 has no Mastery rating; that is GR-E02's.
+    "outcome.mastery": null
+    "round": 5
+    "step": End
+  rejects: []

workplans/CB-WP-0010-consolidation.md

@@ -46,7 +46,7 @@ is what it has been doing for two passes.
 
 ```task
 id: CB-WP-0010-T02
-status: todo
+status: done
 priority: high
 state_hub_task_id: "89355b0a-9fc7-4d69-a27e-d3c94ff0730f"
 ```
@@ -63,6 +63,12 @@ is actually reachable (10 available against 9).
 **Finding a defect here is the likely outcome and is the point** — this
 is the first execution of that code path.
 
+**Done 2026-08-02.** `gr-e03-common-problem.yaml` passes, and **no
+defect was found** — GR-E03 scored correctly on its first execution.
+The assertions were mutation-checked three ways rather than trusted:
+a wrong personal score, a wrong `mastery`, and removing the Blame from
+the fixture each turn it red. Every scoring mode now has a scenario.
+
 ## Task: record CommitWindow's second failed use
 
 ```task