diff --git a/rein_aharness/glas_execution.py b/rein_aharness/glas_execution.py
index 926b7b2..6afe366 100644
--- a/rein_aharness/glas_execution.py
+++ b/rein_aharness/glas_execution.py
@@ -14,6 +14,7 @@ from typing import Any
 from rein_aharness.ops_run_client import OpsRun, OpsRunConfig, resolve_ops_target
 
 GLAS_APPROACH = "glas-profile"
+GLAS_ACTOR = "agt"
 
 _SCALAR_REFS = (
     "correlation_id",
@@ -38,7 +39,10 @@ def _request_kwargs(run: OpsRun, config: OpsRunConfig, report_to_hub: bool) -> d
         "repo": str(resolve_ops_target(run, config)),
         "title": run.title or "(untitled)",
         "description": run.description or "",
-        "actor": config.worker_id,
+        # Activity Core's worker_id owns the queue lease; it is not a Glas
+        # actor type. Sand-boxer validates governed execution actors as
+        # adm|agt|atm, so this runtime enters the gateway as an agent.
+        "actor": GLAS_ACTOR,
         "project": "rein-aharness",
         "request_id": run.id,
         "report_to_hub": report_to_hub,
diff --git a/tests/test_glas_execution.py b/tests/test_glas_execution.py
index 3deec0a..76a5e78 100644
--- a/tests/test_glas_execution.py
+++ b/tests/test_glas_execution.py
@@ -7,7 +7,7 @@ from pathlib import Path
 
 import pytest
 
-from rein_aharness.glas_execution import GlasExecutionError, execute_profiled_run
+from rein_aharness.glas_execution import GLAS_ACTOR, GlasExecutionError, execute_profiled_run
 from rein_aharness.ops_run_client import OpsRun, OpsRunConfig
 
 
@@ -69,7 +69,7 @@ def test_profiled_run_builds_complete_execution_request(tmp_path: Path) -> None:
         "repo": str(repo.resolve()),
         "title": "Governed task",
         "description": "Do the bounded work",
-        "actor": "rein-aharness@test",
+        "actor": GLAS_ACTOR,
         "project": "rein-aharness",
         "request_id": "run-1",
         "correlation_id": "corr-1",
@@ -91,3 +91,39 @@ def test_profiled_run_rejects_invalid_gateway_result(tmp_path: Path) -> None:
             request_factory=lambda **kwargs: kwargs,
             gateway=lambda request: {"evidence": {}},
         )
+
+
+def test_profiled_actor_validates_against_real_glas_and_sandboxer(tmp_path: Path) -> None:
+    contract = pytest.importorskip("glas_harness.contract")
+    sandbox_models = pytest.importorskip("sandboxer.models")
+    repo = _repo(tmp_path)
+    captured = {}
+
+    def validating_gateway(request):
+        captured["request"] = request
+        captured["sandbox_request"] = sandbox_models.SandboxCreateRequest(
+            profile="profile.bwrap-local",
+            inputs={"repo": request.repo},
+            consumer=sandbox_models.Consumer(
+                actor=request.actor,
+                project=request.project,
+                run_id=request.request_id,
+            ),
+        )
+        return {
+            "ok": True,
+            "evidence": {"outcome": "succeeded"},
+            "tool_output": "",
+            "tool_error": None,
+        }
+
+    execute_profiled_run(
+        _run(repo),
+        OpsRunConfig(worker_id="rein-aharness@railiance01", repo_roots=(str(tmp_path),)),
+        request_factory=contract.ExecutionRequest,
+        gateway=validating_gateway,
+    )
+
+    assert captured["request"].actor == "agt"
+    assert captured["sandbox_request"].consumer.actor == sandbox_models.ActorType.AGT
+    assert captured["sandbox_request"].consumer.run_id == "run-1"
diff --git a/workplans/REIN-A-0004-glas-profiled-ops-runs.md b/workplans/REIN-A-0004-glas-profiled-ops-runs.md
index d432861..106adcc 100644
--- a/workplans/REIN-A-0004-glas-profiled-ops-runs.md
+++ b/workplans/REIN-A-0004-glas-profiled-ops-runs.md
@@ -4,12 +4,12 @@ type: workplan
 title: "Profile-driven ops-run execution through Glas"
 domain: infotech
 repo: rein-aharness
-status: blocked
+status: active
 owner: codex
 topic_slug: rein-aharness
 priority: high
 created: "2026-08-22"
-updated: "2026-08-22"
+updated: "2026-08-23"
 related:
   - ACTIVITY-WP-0032
   - ACT-ADR-006
@@ -90,7 +90,7 @@ redaction-by-allowlist, bounding, and unusable bodies.
 
 ```task
 id: REIN-A-0004-T04
-status: wait
+status: progress
 priority: high
 state_hub_task_id: "b19a4dab-d6d7-537a-8c8f-77217f0d9069"
 ```
@@ -124,3 +124,12 @@ backoff. Activity Core handoff `413a4041-cfb3-4d02-a41a-1d92b3de06af`
 contains the production traceback and requests migration application before a
 pilot is scheduled. T04 waits only on that upstream repair and the coordinated
 low-risk proof.
+
+**Resumed 2026-08-23:** Activity Core applied migration `0008` and the bounded
+pilot reached the Glas branch with its selector and refs intact. It refused at
+`sandbox_create` because `OpsRunConfig.worker_id` had been used as the Glas
+actor, conflating queue lease identity (`rein-aharness@railiance01`) with the
+governed actor type (`agt`). Activity Core handoff
+`c9a4ae44-f092-424f-9a4d-9b4cf58d65fd` confirms a direct `actor=agt`
+create/destroy preflight passed and requests the mapping correction plus real
+Glas/sand-boxer model validation before the final pilot.