T10: gate review and first compression pass

All four gate criteria met. False Adaptation Rate 0/7 with 12 of 13 mechanical
mutations absorbed. 178 tests pass. TD-WP-0002 finished.

Fitness loop closed via F-0003: actor isolation was a property of scenarios
written to expose it, not of runs. Actors now carry an automatic private
marker and the runner examines all of them on every scenario, with two
permanent regressions behind it.

Compression - six abstractions removed, each declared and never used:
Verdict.SUSPICIOUS (a verdict no oracle could emit), Step.expect_refusal,
ActorIsolationError, World.seed, EvidencePack.latest, Trajectory.method.

F-0008: Temperature may be redundant. Crystallization was built without it
ever being consulted; measured stability of realization did the work, and is
observed rather than declared. Gated for removal alongside energy.py.

INTENT_CHANGED and REALIZATION_FAILED had never run. Both now have
purpose-built cases and a test that fails if a seventh outcome is added
without one.

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

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 1629012@bnt-lap001
Assistant-Session: 78d4fb13-8a1e-474b-87a3-9b9261c49a39

src/testdriver/runner.py

@@ -56,6 +56,24 @@ class Runner:
 
     # -- independence guards ---------------------------------------------
 
+    def _isolation_violations(self) -> list[str]:
+        """Does any actor hold another's canary?
+
+        Run on every scenario, not only on ones written to test isolation.
+        """
+        canaries = {actor.canary: actor.id for actor in self._world.cast}
+        violations: list[str] = []
+        for actor in self._world.cast:
+            for key in actor.known_keys():
+                value = actor.recall(key)
+                owner = canaries.get(value) if isinstance(value, str) else None
+                if owner is not None and owner != actor.id:
+                    violations.append(
+                        f"actor {actor.id!r} holds the private marker of {owner!r} "
+                        f"under key {key!r}"
+                    )
+        return violations
+
     def _assert_collector_independence(self, stratum: Stratum, collector: str) -> None:
         """S2 and S3 evidence may never be attributed to an actor.
 
@@ -111,6 +129,12 @@ class Runner:
             EnergyEvent(asset.id, run_id, EnergyEventType.EXECUTED).as_dict()
         )
 
+        isolation = self._isolation_violations()
+        self._record(
+            pack, Stratum.JUDGMENT, self._observer.name, "actor_isolation",
+            {"violations": isolation, "actors": sorted(self._world.cast.actors)}, None,
+        )
+
         judgments: list[Judgment] = []
         scenario_sound = True
         claims_by_step: dict[str, list] = {}
@@ -166,7 +190,6 @@ class Runner:
                     "action": step.action.name,
                     "surface_used": realization.surface_id,
                     "refused_by_sut": refused,
-                    "refusal_expected": step.expect_refusal,
                     "postcondition_met": postcondition_met,
                 },
                 step.id,
@@ -176,7 +199,7 @@ class Runner:
             # An action that was accepted but did not take effect did happen —
             # and that is a statement about the system, judged below, not a
             # reason to stop judging.
-            if refused and not step.expect_refusal:
+            if refused:
                 scenario_sound = False
 
             # --- invariants after every step -----------------------------