Constrain provider vocabulary candidate promotion

tests/test_candidate_graph.py

@@ -517,6 +517,53 @@ def test_candidate_generator_does_not_promote_llm_provider_mentions_to_capabilit
     ] == []
 
 
+def test_candidate_generator_does_not_promote_owned_provider_vocabulary_to_capability():
+    repository = Repository(
+        id=1,
+        name="RepoScoping",
+        url="/tmp/repo-scoping",
+        description="Maps repositories into reviewable capability graphs.",
+        branch="main",
+        status="analyzed",
+    )
+    facts = [
+        fact(1, "documentation", "README", "README.md"),
+        fact(2, "interface", "python route decorator", "src/api.py", '@app.get("/repos")'),
+        fact(
+            3,
+            "llm_provider",
+            "OpenRouter",
+            "src/repo_registry/repo_scanning/scanner.py",
+            "openrouter",
+            {"source_role": "implementation_source", "utility_relationship": "owned"},
+        ),
+        fact(
+            4,
+            "provider_registry",
+            "LLM provider registry",
+            "src/repo_registry/repo_scanning/scanner.py",
+            metadata={
+                "source_role": "implementation_source",
+                "utility_relationship": "owned",
+            },
+        ),
+        fact(
+            5,
+            "credential_config",
+            "OpenRouter API key",
+            "src/repo_registry/repo_scanning/scanner.py",
+            "OPENROUTER_API_KEY",
+            {"source_role": "implementation_source", "utility_relationship": "configure"},
+        ),
+    ]
+
+    graph = CandidateGraphGenerator().generate(repository, facts)
+
+    capability_names = {capability.name for capability in graph[0].capabilities}
+    assert "Route LLM Requests Across Providers" not in capability_names
+    assert "Expose Repository Interface" in capability_names
+
+
 def test_candidate_generator_excludes_mention_only_providers_from_promoted_capability():
     repository = Repository(
         id=1,