diff --git a/sso-mfa/k8s/keycape/bind-env-adapter.md b/sso-mfa/k8s/keycape/bind-env-adapter.md
index 3af06e2..39b899d 100644
--- a/sso-mfa/k8s/keycape/bind-env-adapter.md
+++ b/sso-mfa/k8s/keycape/bind-env-adapter.md
@@ -15,7 +15,10 @@ bound to anything else (including a literal), is refused.
 - `read`/`write` are injected capabilities; `write` is compare-and-swap on the
   observed `resourceVersion`. No kubectl, credential or secret value is used.
 - `build(...)` returns a closed Warden v1 `Adapter` (T13 pattern). It pins the
-  owner source digest over `bind-env-adapter.py` + `keycape-client.py`, the
+  owner source digest over the full local import closure (`bind-env-adapter.py`,
+  `keycape-client.py`, `portal-client-rollout.py`, `openbao-client-config.py`,
+  `register-user-engine-portal.py` — closure checked by
+  `test_adapter_source_closure.py`), the
   descriptor digest (`Pins.adapter`), case source and acceptance digests, and the
   admitted invocation (step `bind-env`, actor `human`, lane `key-cape-oidc-login`,
   created object `keycape-env-binding`, not retry-safe, `parent-session` scope).
diff --git a/sso-mfa/k8s/keycape/bind-env-adapter.py b/sso-mfa/k8s/keycape/bind-env-adapter.py
index 2e61140..817fd0f 100644
--- a/sso-mfa/k8s/keycape/bind-env-adapter.py
+++ b/sso-mfa/k8s/keycape/bind-env-adapter.py
@@ -24,7 +24,11 @@ from warden.case_receipt_state import Outcome, Refused
 
 ROOT = Path(__file__).resolve().parent
 REFERENCE = 'net-kingdom/keycape-bind-env@v1'
-SOURCE_FILES = ('bind-env-adapter.py', 'keycape-client.py')
+# keycape-client.py loads portal-client-rollout.py at import, which loads
+# openbao-client-config.py and register-user-engine-portal.py; all of them run.
+SOURCE_FILES = ('bind-env-adapter.py', 'keycape-client.py',
+                'portal-client-rollout.py', 'openbao-client-config.py',
+                'register-user-engine-portal.py')
 CREATED = 'keycape-env-binding'
 _spec = importlib.util.spec_from_file_location('bind_env_owner_helper', ROOT / 'keycape-client.py')
 helper = importlib.util.module_from_spec(_spec)
@@ -74,7 +78,7 @@ def plan(deployment, binding):
 
 
 def source_digest():
-    """Pin adapter plus its local helper import closure, in filename order."""
+    """Pin adapter plus the complete local helper import closure, in filename order."""
     composition = {'files': {name: digest((ROOT / name).read_bytes()) for name in SOURCE_FILES}}
     return digest(json.dumps(composition, sort_keys=True, separators=(',', ':')).encode())
 
diff --git a/sso-mfa/k8s/keycape/test_adapter_source_closure.py b/sso-mfa/k8s/keycape/test_adapter_source_closure.py
new file mode 100644
index 0000000..d44ac8b
--- /dev/null
+++ b/sso-mfa/k8s/keycape/test_adapter_source_closure.py
@@ -0,0 +1,82 @@
+"""Every adapter's source_digest must cover every local file it executes.
+
+Each *-adapter.py is imported in a fresh interpreter with
+importlib.util.spec_from_file_location instrumented; the local .py files
+actually loaded (sys.modules __file__ under the repo plus every
+spec_from_file_location target) must be a subset of its SOURCE_FILES.
+"""
+import json
+import os
+from pathlib import Path
+import subprocess
+import sys
+import unittest
+
+ROOT = Path(__file__).resolve().parent
+REPO = ROOT.parents[2]
+
+PROBE = r'''
+import importlib.util, json, sys
+from pathlib import Path
+root, repo, adapter = Path(sys.argv[1]), Path(sys.argv[2]), sys.argv[3]
+seen = set()
+_orig = importlib.util.spec_from_file_location
+def _spy(name, location=None, *a, **k):
+    if location is not None:
+        seen.add(str(Path(location).resolve()))
+    return _orig(name, location, *a, **k)
+importlib.util.spec_from_file_location = _spy
+spec = _orig('adapter_under_probe', root / adapter)
+mod = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(mod)
+for m in list(sys.modules.values()):
+    f = getattr(m, '__file__', None)
+    if f:
+        seen.add(str(Path(f).resolve()))
+local = sorted(p for p in seen
+               if p.endswith('.py') and Path(p).is_relative_to(repo)
+               and '.venv' not in Path(p).parts and 'site-packages' not in Path(p).parts)
+local.append(str((root / adapter).resolve()))
+pinned = []
+for entry in mod.SOURCE_FILES:
+    pinned.append(str((repo / entry[0] / entry[1]).resolve()) if isinstance(entry, tuple)
+                  else str((root / entry).resolve()))
+print(json.dumps({'loaded': sorted(set(local)), 'pinned': sorted(pinned)}))
+'''
+
+# Adapters outside this fix's scope that fail the check (reported, not fixed).
+KNOWN_FAILING = set()
+
+
+def probe(adapter):
+    out = subprocess.run([sys.executable, '-c', PROBE, str(ROOT), str(REPO), adapter],
+                         capture_output=True, text=True, env=dict(os.environ), cwd=ROOT)
+    if out.returncode:
+        raise AssertionError(f'{adapter} probe failed: {out.stderr[-2000:]}')
+    return json.loads(out.stdout.strip().splitlines()[-1])
+
+
+def unpinned(adapter):
+    r = probe(adapter)
+    return sorted(set(r['loaded']) - set(r['pinned']))
+
+
+class AdapterSourceClosure(unittest.TestCase):
+    pass
+
+
+def _make(adapter):
+    def test(self):
+        missing = unpinned(adapter)
+        self.assertEqual(missing, [], f'{adapter} loads files its source_digest does not pin')
+    if adapter in KNOWN_FAILING:
+        test = unittest.expectedFailure(test)
+    return test
+
+
+for _p in sorted(ROOT.glob('*-adapter.py')):
+    setattr(AdapterSourceClosure, 'test_' + _p.stem.replace('-', '_'), _make(_p.name))
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/sso-mfa/k8s/keycape/test_bind_env_adapter.py b/sso-mfa/k8s/keycape/test_bind_env_adapter.py
index fe35626..b80af14 100644
--- a/sso-mfa/k8s/keycape/test_bind_env_adapter.py
+++ b/sso-mfa/k8s/keycape/test_bind_env_adapter.py
@@ -157,6 +157,21 @@ class BindEnvTests(unittest.TestCase):
         self.assertEqual(s.writes, [])
         self.assertEqual(len(self.revocations), 2)
 
+    def test_source_digest_covers_executed_helper_closure(self):
+        # NK48-R2-F3: keycape-client.py executes portal-client-rollout.py,
+        # which executes openbao-client-config.py and register-user-engine-portal.py.
+        import shutil, tempfile
+        before = a.source_digest()
+        for name in ('portal-client-rollout.py', 'openbao-client-config.py',
+                     'register-user-engine-portal.py'):
+            with tempfile.TemporaryDirectory() as tmp:
+                for f in a.ROOT.glob('*.py'):
+                    shutil.copy(f, Path(tmp) / f.name)
+                with open(Path(tmp) / name, 'a') as fh:
+                    fh.write('\n# drift\n')
+                with patch.object(a, 'ROOT', Path(tmp)):
+                    self.assertNotEqual(a.source_digest(), before, name)
+
     def test_tampered_or_unauthenticated_evidence_never_authorizes_undo(self):
         s = Store(deployment())
         ad = self.adapter(s)