fix(snippets): satisfy the parity guards the drift check tripped

Two CI failures, both the guards working as intended rather than defects
in them:

- The MCP tool-name manifest and the REST route/service parity lists are
  explicit, so a new capability has to be added to both surfaces or the
  test fails. verify_snippet / verify_snippet_route / record_verification
  added, plus an assertion that the `verification` filter reaches both
  callers — a verdict an agent records must be visible to the human
  looking at the same corpus, or the two surfaces disagree about what's
  rotten (rule #33).

- vue-tsc rejected two object-literal lookups keyed by the status union:
  `status` includes "ok" and "unverified", and an object literal has to
  enumerate every member even just to say "nothing to show for these".
  Typed as Record<string, string>, which is what the ?? "" fallback
  already assumed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UaYUaouG9jjhATyuxCKrQs

frontend/src/views/SnippetListView.vue

@@ -161,9 +161,15 @@ function driftBadge(s: SnippetListItem): string {
   const v = s.verification;
   if (!v) return "";
   if (!v.current) return "unchecked since edit";
-  return { ok: "", missing: "path gone", moved: "symbol moved", changed: "code drifted" }[
-    v.status
-  ] ?? "";
+  // Record<string, string>, not an object literal: `status` is a union that
+  // includes "ok" and "unverified", and a literal would have to enumerate every
+  // member just to say "nothing to show for these".
+  const labels: Record<string, string> = {
+    missing: "path gone",
+    moved: "symbol moved",
+    changed: "code drifted",
+  };
+  return labels[v.status] ?? "";
 }
 
 function driftTitle(s: SnippetListItem): string {
@@ -178,12 +184,12 @@ function driftTitle(s: SnippetListItem): string {
       `code this record no longer holds. Re-verify it.`
     );
   }
-  const what =
-    {
+  const reasons: Record<string, string> = {
     missing: "the recorded path no longer exists",
     moved: "the file is there but the symbol isn't in it",
     changed: "the source no longer matches the recorded code",
-    }[v.status] ?? "";
+  };
+  const what = reasons[v.status] ?? "";
   return v.detail ? `${when}: ${what}. ${v.detail}` : `${when}: ${what}.`;
 }
 

tests/test_mcp_tool_snippets.py

@@ -228,5 +228,5 @@ def test_register_attaches_all_tools():
     snippets.register(FakeMcp())
     assert set(names) == {
         "list_snippets", "create_snippet", "get_snippet", "update_snippet",
-        "delete_snippet", "merge_snippets",
+        "delete_snippet", "merge_snippets", "verify_snippet",
     }

tests/test_routes_snippets.py

@@ -20,6 +20,7 @@ def test_snippet_handlers_callable():
     for name in (
         "list_snippets_route", "create_snippet_route", "get_snippet_route",
         "update_snippet_route", "delete_snippet_route", "merge_snippet_route",
+        "verify_snippet_route",
     ):
         assert callable(getattr(routes, name))
 
@@ -29,7 +30,7 @@ def test_service_functions_take_user_id():
     from scribe.services import snippets as svc
     for fn_name in (
         "create_snippet", "list_snippets", "get_snippet", "update_snippet",
-        "delete_snippet", "merge_snippets",
+        "delete_snippet", "merge_snippets", "record_verification",
     ):
         fn = getattr(svc, fn_name)
         assert callable(fn)
@@ -45,7 +46,7 @@ def test_agent_and_web_surfaces_stay_at_parity():
     from scribe.routes import snippets as routes
 
     # Every write verb the web surface offers, the agent surface offers too.
-    for verb in ("create", "get", "list", "update", "delete", "merge"):
+    for verb in ("create", "get", "list", "update", "delete", "merge", "verify"):
         assert callable(getattr(tools, f"{verb}_snippets", None) or
                         getattr(tools, f"{verb}_snippet", None)), f"MCP lacks {verb}"
 
@@ -61,6 +62,12 @@ def test_agent_and_web_surfaces_stay_at_parity():
         assert "system_ids" in inspect.getsource(route)
     assert "find_duplicate_note" in inspect.getsource(routes.create_snippet_route)
 
+    # The drift check (#2086) reaches both: recording a verdict, and filtering
+    # the list by one. A verdict an agent records has to be visible to the human
+    # looking at the same corpus, or the two surfaces disagree about what's rotten.
+    assert "verification" in inspect.signature(tools.list_snippets).parameters
+    assert "verification" in inspect.getsource(routes.list_snippets_route)
+
 
 def test_project_scoping_reaches_every_caller():
     """A snippet search has to be narrowable to one project from both surfaces."""