diff --git a/examples/semantic-vocabulary-drift-smoke.py b/examples/semantic-vocabulary-drift-smoke.py
index 5e3b06d189..2049a4e8cf 100755
--- a/examples/semantic-vocabulary-drift-smoke.py
+++ b/examples/semantic-vocabulary-drift-smoke.py
@@ -463,6 +463,21 @@ def _producer_literals(field: str, source: SourceFile) -> set[str]:
     return set().union(*(row.values for row in rows))
 
 
+def summarise_blockers(sites: list[str]) -> str:
+    """Count reported sites by blocker so the total is actionable, not opaque.
+
+    `argument_name_only` and `annotation_only` can never become evidence: the
+    first is a field-named keyword argument, the second a bare declaration.
+    Counting them with resolvable paths would make the total look reducible.
+    """
+
+    counts: dict[str, int] = {}
+    for site in sites:
+        label = site.rpartition('[')[2].rstrip(']') or 'other'
+        counts[label] = counts.get(label, 0) + 1
+    return ','.join(f"{label}={counts[label]}" for label in sorted(counts))
+
+
 def check_producers(registry: dict[str, Any], sources: list[SourceFile]) -> list[str]:
     unknown: list[str] = []
     for name, vocabulary in registry['vocabularies'].items():
@@ -710,6 +725,7 @@ def main() -> int:
     print("  " + " ".join(budgets))
     print("  " + twins)
     print(f"  unresolved_producer_sites={len(unknown_producers)} (not proven safe)")
+    print("  unresolved_producer_blockers=" + summarise_blockers(unknown_producers))
     uncovered = [name for name, v in registry['vocabularies'].items() if v['tier'] == 'kernel' and 'producers' not in v]
     print(f"  kernel_producer_coverage_pending={','.join(uncovered)}")
     if '--report' in sys.argv[1:]:
diff --git a/loopx/semantics/production.py b/loopx/semantics/production.py
index 14cc6faeba..0b12cbaa61 100644
--- a/loopx/semantics/production.py
+++ b/loopx/semantics/production.py
@@ -126,7 +126,8 @@ def _typescript_scan(
                 and isinstance(error.get('line'), int) and error['line'] > 0):
             raise ValueError(f"{error['path']}:{error['line']}: invalid TypeScript source; repair syntax before semantic scanning")
         raise ValueError('TypeScript production parser failed; run npm ci --ignore-scripts and check the Node runtime')
-    rows.extend(Production(r['site'], r['line'], r['form'], frozenset(r['values']), r['unresolved'])
+    rows.extend(Production(r['site'], r['line'], r['form'], frozenset(r['values']), r['unresolved'],
+                           'typescript_dynamic' if r['unresolved'] else None)
                 for r in json.loads(completed.stdout))
     return rows
 
@@ -191,7 +192,10 @@ def validate_production(
     undeclared = sorted({row.site for row in outputs if row.values and row.site not in declared})
     if undeclared:
         raise ValueError(f'{name}: undeclared producer sites: {undeclared}')
-    return sorted({f'{row.site}:{row.line}' for row in rows if row.unresolved})
+    # The label says why the unknown stayed unknown, so the count is actionable:
+    # `argument_name_only` and `annotation_only` can never become evidence.
+    return sorted({f'{row.site}:{row.line} [{row.blocker or "other"}]'
+                   for row in rows if row.unresolved})
 
 
 def probe_turn_result_input_domain(vocabulary: dict[str, Any]) -> list[Production]:
diff --git a/loopx/semantics/python_production.py b/loopx/semantics/python_production.py
index 8fb398cf31..3bcf1be656 100644
--- a/loopx/semantics/python_production.py
+++ b/loopx/semantics/python_production.py
@@ -21,6 +21,18 @@ class Production:
     form: str
     values: frozenset[str]
     unresolved: bool
+    blocker: str | None = None
+    """Why the unknown portion stayed unknown; ``None`` when fully resolved.
+
+    ``argument_name_only`` a field-named keyword argument, which never proves an
+    output role. ``unstable_local`` a parameter, reassignment or shadowed name.
+    ``call_result`` the value comes back from a call. ``dynamic_key`` a computed
+    or non-literal subscript. ``serialized_value`` a string where an enum object
+    was required. ``annotation_only`` a bare annotation that declares the field
+    without a value. ``attribute_read`` an attribute of an unresolved object.
+    ``typescript_dynamic`` the TypeScript scanner could not resolve the write.
+    ``other`` anything else; it keeps the site visible.
+    """
 
 
 def _module(path: str) -> str:
@@ -373,29 +385,35 @@ def index_value(node: ast.AST) -> str | int | None:
         def lookup(container: ast.AST | None, key: str | int | None) -> tuple[list[ast.AST], bool]:
             if isinstance(container, (ast.Tuple, ast.List)):
                 if type(key) is int:
-                    return ([container.elts[key]], False) if -len(container.elts) <= key < len(container.elts) else ([], True)
+                    return ([container.elts[key]], False) if -len(container.elts) <= key < len(container.elts) else ([], blocked('dynamic_key'))
                 if key is not None:
-                    return [], True
-                return list(container.elts), True
+                    return [], blocked('dynamic_key')
+                return list(container.elts), blocked('dynamic_key')
             if isinstance(container, ast.Dict):
                 keys = [index_value(k) if k is not None else None for k in container.keys]
                 if key is not None and all(k is not None for k in keys):
                     # Python dict construction keeps the last duplicate key.
                     found = [v for k, v in zip(keys, container.values, strict=True) if k == key]
-                    return ([found[-1]], False) if found else ([], True)
-                return list(container.values), True
-            return [], True
+                    return ([found[-1]], False) if found else ([], blocked('dynamic_key'))
+                return list(container.values), blocked('dynamic_key')
+            return [], blocked('unstable_local' if isinstance(container, ast.Name) else 'other')
+
+        blockers: list[str] = []
+
+        def blocked(label: str) -> bool:
+            blockers.append(label)
+            return True
 
         def resolve(node: ast.AST | None, seen: frozenset[str] = frozenset(), *, enum_only: bool = False) -> tuple[set[str], bool]:
             node, seen = bound(node, seen)
             if isinstance(node, ast.Constant):
                 if isinstance(node.value, str):
                     return ({node.value} if node.value and not enum_only else set()), False
-                return set(), node.value is not None
+                return set(), node.value is not None and blocked('other')
             if isinstance(node, ast.Subscript):
                 if isinstance(node.slice, ast.Slice) or (isinstance(node.slice, ast.Constant)
                         and type(node.slice.value) not in (str, int)):
-                    return set(), True
+                    return set(), blocked('dynamic_key')
                 container, visited = bound(node.value, seen)
                 choices, unknown = lookup(container, index_value(node.slice))
                 known: set[str] = set()
@@ -422,7 +440,14 @@ def resolve(node: ast.AST | None, seen: frozenset[str] = frozenset(), *, enum_on
                         return {members[member.attr]}, False
                 if node.attr == 'value' and isinstance(node.value, ast.Name):
                     return enum_object_value(node.value, seen)
-            return set(), True
+                return set(), blocked('attribute_read')
+            if isinstance(node, ast.Call):
+                return set(), blocked('call_result')
+            if isinstance(node, ast.Name):
+                return set(), blocked('unstable_local')
+            if node is None:
+                return set(), blocked('other')
+            return set(), blocked('other')
 
         def enum_object_value(node: ast.AST, seen: frozenset[str]) -> tuple[set[str], bool]:
             node, seen = bound(node, seen)
@@ -433,7 +458,7 @@ def enum_object_value(node: ast.AST, seen: frozenset[str]) -> tuple[set[str], bo
                 return resolve(node, seen, enum_only=True)
             # A serialized string (including Action.RUN.value) is not an enum
             # object with another .value attribute.
-            return set(), True
+            return set(), blocked('serialized_value')
 
         def returned(node: ast.AST | None, path: tuple[str | int, ...], seen: frozenset[str] = frozenset()) -> tuple[set[str], bool]:
             if not path:
@@ -444,10 +469,17 @@ def returned(node: ast.AST | None, path: tuple[str | int, ...], seen: frozenset[
             return set().union(*(v for v, _ in parts)), unknown or any(u for _, u in parts)
 
         def record(node: ast.AST | None, form: str, location: ast.AST) -> None:
+            blockers.clear()
             values, unknown = (returned(node, return_paths.get(scope, ())) if form == 'return' else resolve(node))
+            blocker = blockers[0] if blockers else None
+            if node is None and form == 'assignment':
+                # A bare annotation declares the field; there is no value to resolve.
+                blocker = 'annotation_only'
             if form == 'keyword_unproved':
-                unknown = True  # Argument name alone does not prove an output role.
-            result.append(Production(f'{source.path}::{scope}', location.lineno, form, frozenset(values), unknown))
+                # Argument name alone does not prove an output role.
+                unknown, blocker = True, 'argument_name_only'
+            result.append(Production(f'{source.path}::{scope}', location.lineno, form,
+                                     frozenset(values), unknown, blocker if unknown else None))
 
         for node in nodes:
             if isinstance(node, ast.Assign):
diff --git a/tests/architecture/test_semantic_production.py b/tests/architecture/test_semantic_production.py
index 68080a929a..dc80f88bd3 100644
--- a/tests/architecture/test_semantic_production.py
+++ b/tests/architecture/test_semantic_production.py
@@ -53,8 +53,8 @@ def vocabulary():
             'literal_scan': {'field': 'action'}}
 
 
-def row(value, *, site=SITE, unresolved=False):
-    return Production(site, 1, 'return', frozenset([value]) if value else frozenset(), unresolved)
+def row(value, *, site=SITE, unresolved=False, blocker=None):
+    return Production(site, 1, 'return', frozenset([value]) if value else frozenset(), unresolved, blocker)
 
 
 def test_owner_values_never_satisfy_production_liveness():
@@ -74,9 +74,12 @@ def test_registering_an_unrelated_function_does_not_cover_a_writer():
 
 def test_dynamic_path_remains_visible_and_cannot_supply_missing_value():
     with pytest.raises(ValueError, match='no observed producer'):
-        validate_production('action', vocabulary(), [row('run'), row(None, unresolved=True)])
-    unknown = validate_production('action', vocabulary(), [row('run'), row('wait'), row(None, unresolved=True)])
-    assert unknown == [SITE + ':1']
+        validate_production('action', vocabulary(), [row('run'), row(None, unresolved=True, blocker='call_result')])
+    unknown = validate_production('action', vocabulary(),
+                                  [row('run'), row('wait'), row(None, unresolved=True, blocker='call_result')])
+    # The reported entry names the site and why it stayed unknown. Passing the
+    # blocker explicitly keeps a lost label from passing as the `other` fallback.
+    assert unknown == [f'{SITE}:1 [call_result]']
 
 
 def test_compatibility_values_must_have_no_observed_production():
@@ -288,3 +291,23 @@ def test_input_witness_runs_only_for_the_anchored_site():
     rows = collect_production(ROOT, anchored, [])
     assert {r.form for r in rows} == {'input_witness'}
     assert set().union(*(r.values for r in rows)) == set(values)
+
+
+def test_reported_sites_carry_a_blocker_label_and_summarise():
+    import runpy
+
+    from loopx.semantics.inventory import load_sources
+
+    smoke = runpy.run_path(str(ROOT / 'examples/semantic-vocabulary-drift-smoke.py'),
+                           run_name='not_main')
+    registry = smoke['load_registry']()
+    sites = smoke['check_producers'](registry, load_sources(ROOT))
+    assert sites, 'the repository still has unresolved producer sites to describe'
+    assert all(site.endswith(']') and ' [' in site for site in sites)
+    summary = smoke['summarise_blockers'](sites)
+    counted = sum(int(part.split('=')[1]) for part in summary.split(','))
+    assert counted == len(sites)
+    # These two can never become evidence, so they must stay separable from the
+    # paths a future slice could still resolve.
+    assert 'argument_name_only=' in summary
+    assert 'annotation_only=' in summary
diff --git a/tests/architecture/test_semantic_python_production.py b/tests/architecture/test_semantic_python_production.py
index 532deacfa5..faf6299705 100644
--- a/tests/architecture/test_semantic_python_production.py
+++ b/tests/architecture/test_semantic_python_production.py
@@ -317,3 +317,40 @@ def test_second_reexport_hop_and_untracked_module_stay_unknown():
     assert known(rows) == set() and all(r.unresolved for r in rows)
     rows = scan('from .compat import Action\ndef emit():\n return Action.RUN.value\n', returns=['emit'], modules={})
     assert known(rows) == set() and all(r.unresolved for r in rows)
+
+
+def blockers(rows):
+    return {r.blocker for r in rows if r.unresolved}
+
+
+@pytest.mark.parametrize('text, expected', [
+    # a field-named keyword argument never proves an output role
+    ('from .owner import Action\ndef emit(p):\n return Packet(action=p)\n', 'argument_name_only'),
+    # a bare annotation declares the field; there is no value to resolve
+    ('class Packet:\n action: str\n', 'annotation_only'),
+    # a parameter cannot borrow owner values
+    ('def emit(action):\n p = {"action": action}\n return p\n', 'unstable_local'),
+    # the value comes back from a call
+    ('def emit():\n return {"action": compute()}\n', 'call_result'),
+    # a computed subscript is not a literal key
+    ('def emit(key, table):\n return {"action": table[key]}\n', 'unstable_local'),
+])
+def test_unresolved_rows_say_why_they_stayed_unknown(text, expected):
+    rows = scan(text)
+    assert expected in blockers(rows), (expected, [(r.form, r.blocker) for r in rows])
+
+
+def test_resolved_rows_carry_no_blocker():
+    rows = scan('from .owner import Action\ndef emit():\n return {"action": Action.RUN.value}\n')
+    assert rows and all(r.blocker is None for r in rows if not r.unresolved)
+
+
+def test_every_unresolved_row_is_labelled():
+    """An unlabelled unknown would be invisible in the report breakdown."""
+
+    rows = scan('from .owner import Action\ndef emit(p, table, key):\n'
+                ' a = {"action": p}\n'
+                ' b = {"action": table[key]}\n'
+                ' c = Packet(action=compute())\n'
+                ' return [a, b, c]\n')
+    assert all(r.blocker for r in rows if r.unresolved)