diff --git a/editors/vscode/syntaxes/bifrost-rql.tmLanguage.json b/editors/vscode/syntaxes/bifrost-rql.tmLanguage.json
index 79670bb..05c2cee 100644
--- a/editors/vscode/syntaxes/bifrost-rql.tmLanguage.json
+++ b/editors/vscode/syntaxes/bifrost-rql.tmLanguage.json
@@ -58,7 +58,7 @@
     },
     {
       "name": "support.function.wrapper.bifrost-rql",
-      "match": "\\b(?:absent[-_]member|correlate|require[-_]both|configuration[-_]key|dependency[-_]configuration|dependency[-_]evidence|configuration[-_]facts|filter|call-input|call[-_]shape|class[-_]set|call[-_]results|call[-_]argument[-_]groups|call[-_]arguments|call[-_]result[-_]contracts|callable[-_]signature|signature[-_]parameters|callable[-_]applicability|overload[-_]selection|jsx[-_]attribute[-_]value|field[-_]write[-_]value|local[-_]value|call-sites-from|call-sites-to|callees|callers|cfg-edge-source|cfg-edge-target|cfg-entry|cfg-exits|cfg-predecessor-edges|cfg-successor-edges|cfg_edge_source|cfg_edge_target|cfg_entry|cfg_exits|cfg_predecessor_edges|cfg_successor_edges|concurrent[-_]access[-_]conflicts|enclosing-decl|except|explain|file-of|importers-of|imports-of|inside-decl|inside_decl|inside|intersect|language|languages|limit|member-targets|member[-_]selection|members|generation[-_]sites|generates|generated[-_]by|dispatch[-_]outcome|dispatch[-_]targets|member[-_]family|family[-_]edges|declaration[-_]state[-_]of|implementation[-_]of|stubs[-_]of|export[-_]target|exports|export|binding[-_]of|binding[-_]occurrence|bindings[-_]in|bindings|binding|candidate[-_]hierarchy|candidate[-_]target|candidates[-_]of|edge[-_]target|edges[-_]from|edges[-_]of|state[-_]events[-_]of|control[-_]relations|guards[-_]of|flow[-_]relations[-_]of|flow[-_]source|flow[-_]target|result[-_]contract[-_](?:calls|uses|operation[-_]uses|failure[-_]uses)|rewrite[-_]paths[-_]of|not-inside|occurrences[-_]of|occurrences[-_]in|occurrence[-_]target|occurrences|occurrence|owner|points-to|scope[-_]ancestors|scope[-_]of|scopes|scope|paths|path|segments[-_]of|segment[-_]target|procedure-of|procedure_of|profile|receiver-targets|receiver[-_]outcome|receiver[-_]evidence|references-of|result-detail|rust[-_]pointer[-_]findings|subtypes|supertypes|taint|typestate|union|used-by|uses|value-flow|value_flow|where|witness)\\b"
+      "match": "(?<![A-Za-z0-9_:-])(?:anchor|absent[-_]member|correlate|require[-_]both|configuration[-_]key|dependency[-_]configuration|dependency[-_]evidence|configuration[-_]facts|filter|call-input|call[-_]shape|class[-_]set|call[-_]results|call[-_]argument[-_]groups|call[-_]arguments|call[-_]result[-_]contracts|callable[-_]signature|signature[-_]parameters|callable[-_]applicability|overload[-_]selection|jsx[-_]attribute[-_]value|field[-_]write[-_]value|local[-_]value|call-sites-from|call-sites-to|callees|callers|cfg-edge-source|cfg-edge-target|cfg-entry|cfg-exits|cfg-predecessor-edges|cfg-successor-edges|cfg_edge_source|cfg_edge_target|cfg_entry|cfg_exits|cfg_predecessor_edges|cfg_successor_edges|concurrent[-_]access[-_]conflicts|enclosing-decl|except|explain|file-of|importers-of|imports-of|inside-decl|inside_decl|inside|intersect|language|languages|limit|member-targets|member[-_]selection|members|generation[-_]sites|generates|generated[-_]by|dispatch[-_]outcome|dispatch[-_]targets|member[-_]family|family[-_]edges|declaration[-_]state[-_]of|implementation[-_]of|stubs[-_]of|export[-_]target|exports|export|binding[-_]of|binding[-_]occurrence|bindings[-_]in|bindings|binding|candidate[-_]hierarchy|candidate[-_]target|candidates[-_]of|edge[-_]target|edges[-_]from|edges[-_]of|state[-_]events[-_]of|control[-_]relations|guards[-_]of|flow[-_]relations[-_]of|flow[-_]source|flow[-_]target|result[-_]contract[-_](?:calls|uses|operation[-_]uses|failure[-_]uses)|rewrite[-_]paths[-_]of|not-inside|occurrences[-_]of|occurrences[-_]in|occurrence[-_]target|occurrences|occurrence|owner|points-to|scope[-_]ancestors|scope[-_]of|scopes|scope|paths|path|segments[-_]of|segment[-_]target|procedure-of|procedure_of|profile|receiver-targets|receiver[-_]outcome|receiver[-_]evidence|references-of|result-detail|rust[-_]pointer[-_]findings|subtypes|supertypes|taint|typestate|union|used-by|uses|value-flow|value_flow|where|witness)(?=$|[\\s()\\[\\]])"
     },
     {
       "name": "entity.name.type.kind.bifrost-rql",
diff --git a/editors/vscode/test/rql-grammar.test.ts b/editors/vscode/test/rql-grammar.test.ts
index 28bffff..3b73c11 100644
--- a/editors/vscode/test/rql-grammar.test.ts
+++ b/editors/vscode/test/rql-grammar.test.ts
@@ -233,6 +233,32 @@ void test("highlights local-value constraints and relation forms", async () => {
   assertScoped(tokens, "local_value", "support.function.wrapper.bifrost-rql");
 });
 
+void test("keeps wrapper boundaries exact for anchor and local-value forms", async () => {
+  const loaded = await grammar();
+  const positive = tokenizeGrammar(
+    loaded,
+    "(anchor (capture finding)) (local-value (identifier)) (local_value (identifier))"
+  );
+  assertScoped(positive, "anchor", "support.function.wrapper.bifrost-rql");
+  assertScoped(positive, "local-value", "support.function.wrapper.bifrost-rql");
+  assertScoped(positive, "local_value", "support.function.wrapper.bifrost-rql");
+
+  for (const nearMiss of [
+    "(anchor-extra (capture finding))",
+    "(not-anchor (capture finding))",
+    "(:anchor (capture finding))",
+    "(local-value-extra (identifier))",
+    "(foo-local-value (identifier))",
+    "(local_value_extra (identifier))"
+  ]) {
+    const tokens = tokenizeGrammar(loaded, nearMiss);
+    assert.ok(
+      tokens.every((token) => !token.scopes.includes("support.function.wrapper.bifrost-rql")),
+      `expected ${JSON.stringify(nearMiss)} to have no wrapper scope`
+    );
+  }
+});
+
 void test("highlights declaration-bounded containment", async () => {
   const tokens = tokenizeGrammar(await grammar(), "(inside-decl (loop) (call))");
   assertScoped(tokens, "inside-decl", "support.function.wrapper.bifrost-rql");