diff --git a/crates/cb-game-runtime/src/scenario.rs b/crates/cb-game-runtime/src/scenario.rs
index 1a6aa08..ed47391 100644
--- a/crates/cb-game-runtime/src/scenario.rs
+++ b/crates/cb-game-runtime/src/scenario.rs
@@ -21,6 +21,16 @@ pub struct ScenarioFile {
     /// scenario, not the kernel.
     #[serde(default)]
     pub provisional: bool,
+    /// Who must rule on the U-item this scenario encodes. Required when
+    /// `provisional` is true: a provisional default with no owner can
+    /// shape the kernel indefinitely while looking handled
+    /// (CB-WP-0003 T08).
+    #[serde(default)]
+    pub provisional_owner: String,
+    /// ISO date the provisional default was raised, so its age is
+    /// reportable by `make coverage`.
+    #[serde(default)]
+    pub provisional_raised: String,
     pub seed: u64,
     pub setup: Setup,
     pub commands: Vec<CommandStep>,
diff --git a/scenarios/ground/gr-a04-bond-support.yaml b/scenarios/ground/gr-a04-bond-support.yaml
index d70d957..f315220 100644
--- a/scenarios/ground/gr-a04-bond-support.yaml
+++ b/scenarios/ground/gr-a04-bond-support.yaml
@@ -5,6 +5,8 @@ description: >
   Bond, because GR-L02 requires the target's consent.
 covers: [GR-A04, GR-F04, GR-L02, GR-L05]
 provisional: true
+provisional_owner: ground-game
+provisional_raised: 2026-07-31
 seed: 42
 setup:
   players: 3
diff --git a/scenarios/ground/gr-d01-darvo-trigger.yaml b/scenarios/ground/gr-d01-darvo-trigger.yaml
index 19ed4ab..fe99a86 100644
--- a/scenarios/ground/gr-d01-darvo-trigger.yaml
+++ b/scenarios/ground/gr-d01-darvo-trigger.yaml
@@ -5,6 +5,8 @@ description: >
   application (GR-F01 under the U2 default).
 covers: [GR-D01, GR-R08, GR-F01]
 provisional: true
+provisional_owner: ground-game
+provisional_raised: 2026-07-31
 seed: 42
 setup:
   players: 3
diff --git a/scenarios/ground/gr-d05-darvo-reverse.yaml b/scenarios/ground/gr-d05-darvo-reverse.yaml
index 77efb18..f1e6d89 100644
--- a/scenarios/ground/gr-d05-darvo-reverse.yaml
+++ b/scenarios/ground/gr-d05-darvo-reverse.yaml
@@ -5,6 +5,8 @@ description: >
   owner takes −2 Stress and the sequence ends (GR-D05, GR-D07).
 covers: [GR-D05, GR-D07, GR-T01]
 provisional: true
+provisional_owner: ground-game
+provisional_raised: 2026-07-31
 seed: 42
 setup:
   players: 3
diff --git a/scenarios/ground/gr-e02-shared-ground.yaml b/scenarios/ground/gr-e02-shared-ground.yaml
index 8182ef2..04e9aa7 100644
--- a/scenarios/ground/gr-e02-shared-ground.yaml
+++ b/scenarios/ground/gr-e02-shared-ground.yaml
@@ -5,6 +5,8 @@ description: >
   rating reduced by each Blame token and each Denied Problem.
 covers: [GR-R09, GR-E01, GR-E02, GR-P03]
 provisional: true
+provisional_owner: ground-game
+provisional_raised: 2026-07-31
 seed: 42
 setup:
   players: 3
diff --git a/scenarios/ground/gr-e04-coalitions.yaml b/scenarios/ground/gr-e04-coalitions.yaml
index d9771ec..dd9f16d 100644
--- a/scenarios/ground/gr-e04-coalitions.yaml
+++ b/scenarios/ground/gr-e04-coalitions.yaml
@@ -5,6 +5,8 @@ description: >
   one. Personal scores subtract Blame (GR-E03, GR-T02).
 covers: [GR-E03, GR-E04, GR-O03]
 provisional: true
+provisional_owner: ground-game
+provisional_raised: 2026-07-31
 seed: 42
 setup:
   players: 3
diff --git a/specs/GroundRules.md b/specs/GroundRules.md
index 78a1284..620b120 100644
--- a/specs/GroundRules.md
+++ b/specs/GroundRules.md
@@ -210,6 +210,15 @@ terms.
 
 ## Underdetermined in dataset 0.1 — PROVISIONAL defaults (flag to ground-game)
 
+**Owner: ground-game. Raised: 2026-07-31.** Every U-item carries an owner
+and a raise date so its age is visible; `make coverage` reports both and
+warns past 30 days. CI **warns rather than breaks** — the ruling belongs
+to ground-game and the kernel cannot make it for them — but every evidence
+file that depends on one must list it (CB-WP-0003 T08).
+
+A ruling flips the *scenario*, not the kernel: the default is encoded in a
+scenario tagged `provisional: true`, so a correction is a data change.
+
 Formalization exposed points the dataset does not decide. Simulation uses
 the stated default; each is tagged in scenarios that depend on it and must
 be confirmed or corrected by ground-game.
diff --git a/tools/rule-coverage.py b/tools/rule-coverage.py
index 73ef5ae..109f9ed 100755
--- a/tools/rule-coverage.py
+++ b/tools/rule-coverage.py
@@ -27,6 +27,10 @@ import sys
 RULE_RE = r"\*\*(GR-[A-Z]+\d+)"
 COVERS_RE = r"covers: \[(.*?)\]"
 AGGREGATE = "games/ground/src/lib.rs"
+# CB-WP-0003 T08: a provisional default with no expiry can shape the kernel
+# indefinitely while looking handled. CI warns; it does not break the build,
+# because the ruling is a ground-game decision we cannot make for them.
+PROVISIONAL_WARN_DAYS = 30
 ID_RE = r"GR-[A-Z]+\d+"
 
 
@@ -39,6 +43,21 @@ def parse_code_ids(text):
     return set(re.findall(ID_RE, text))
 
 
+def provisional_items(paths):
+    """(path, owner, raised) for every scenario encoding a U-item default."""
+    out = []
+    for path in paths:
+        text = open(path).read()
+        if not re.search(r"^provisional:\s*true", text, re.M):
+            continue
+        owner = re.search(r"^provisional_owner:\s*(\S+)", text, re.M)
+        raised = re.search(r"^provisional_raised:\s*(\S+)", text, re.M)
+        out.append((path,
+                    owner.group(1) if owner else None,
+                    raised.group(1) if raised else None))
+    return out
+
+
 def parse_covers(text):
     match = re.search(COVERS_RE, text, re.S)
     if not match:
@@ -71,6 +90,12 @@ def self_test():
           == {"GR-R06", "GR-A12"})
     check("code-id matcher finds none in unmarked source",
           parse_code_ids("fn f() { let x = 1; }") == set())
+    # T08: every provisional scenario must carry an owner and a date.
+    import glob as _g
+    prov = provisional_items(sorted(_g.glob("scenarios/ground/*.yaml")))
+    check("every provisional item has an owner and a raised date",
+          bool(prov) and all(o and r for _, o, r in prov),
+          f"{len(prov)} provisional item(s)")
 
     print("rule-coverage self-test (positive control)")
     ok = True
@@ -128,6 +153,34 @@ def main():
         print("  ERROR — rule id in code that the spec does not define:",
               " ".join(phantom), file=sys.stderr)
         return 1
+    # T08: provisional items are reported with an owner and an age.
+    prov = provisional_items(paths)
+    if prov:
+        import datetime
+        today = datetime.date.today()
+        print(f"\nprovisional U-item defaults: {len(prov)}")
+        unowned, stale = [], []
+        for path, owner, raised in prov:
+            age = "?"
+            if raised:
+                try:
+                    age = (today - datetime.date.fromisoformat(raised)).days
+                except ValueError:
+                    age = "?"
+            name = path.split("/")[-1]
+            print(f"  {name:<34} owner={owner or 'NONE':<12} age={age}d")
+            if not owner:
+                unowned.append(name)
+            if isinstance(age, int) and age > PROVISIONAL_WARN_DAYS:
+                stale.append(f"{name} ({age}d)")
+        if unowned:
+            print("  WARN — provisional with no owner:", " ".join(unowned))
+        if stale:
+            print(f"  WARN — provisional for over {PROVISIONAL_WARN_DAYS} days:",
+                  " ".join(stale))
+        print("  NOTE: evidence files must list these; a ruling flips the "
+              "scenario, not the kernel")
+
     if missing:
         print("  uncovered:", " ".join(missing))
     if invented:
diff --git a/workplans/CB-WP-0003-loop-hardening.md b/workplans/CB-WP-0003-loop-hardening.md
index 33bdc57..fef7c1b 100644
--- a/workplans/CB-WP-0003-loop-hardening.md
+++ b/workplans/CB-WP-0003-loop-hardening.md
@@ -286,7 +286,7 @@ self-report of which one it was.
 
 ```task
 id: CB-WP-0003-T08
-status: todo
+status: done
 priority: low
 state_hub_task_id: "c2ee91ee-e551-48a7-b1a9-477c34c0690c"
 ```