@@ -0,0 +1,10 @@
+---
+'@objectstack/driver-sql': patch
+---
+
+refactor(driver-sql): the comparand bind test reads the list operators from the spec
+
+Clause-②: no
+Metadata-protocol: none
+
+The SQL driver bind-tests each member of a `$in`, `$nin` or `$between` list as a comparand in its own right. It now asks `isListComparandOperator` from `@objectstack/spec/data` which operators take a list, instead of keeping its own copy of `$in` / `$nin` / `$between`. The set is the same, so no filter compiles or is refused differently. A later change to the spec's list operators now reaches this driver without a second edit.
@@ -0,0 +1,10 @@
+---
+'@objectstack/plugin-security': patch
+---
+
+refactor(plugin-security): the RLS stored-form check reads the list operators from the spec
+
+Clause-②: no
+Metadata-protocol: none
+
+The RLS check puts a value comparand into its column's storage form, and a `$in`, `$nin` or `$between` list member by member. It now asks `isListComparandOperator` from `@objectstack/spec/data` which operators take a list, instead of keeping its own copy of `$in` / `$nin` / `$between`. The set is the same, so no policy filter is judged differently. A later change to the spec's list operators now reaches this check without a second edit.
@@ -72,6 +72,11 @@ import {
   isAcceptedFilterComparand,
   ACCEPTED_FILTER_COMPARAND_TYPES_SENTENCE,
 } from '@objectstack/spec/data';
+// [#29611] The operator split's list half (`$in` / `$nin` / `$between`): the
+// operators whose comparand is a LIST, so each member is bind-tested on its own
+// (see {@link assertCompilableComparand}). Asked of the spec, the one source the
+// comparand faces read, so this driver keeps no copy to drift from it.
+import { isListComparandOperator } from '@objectstack/spec/data';
 // [#7536] `$like`/`$ilike`'s pattern language, defined once in the spec: the
 // dangling-escape gate every face refuses on, and the LIKE→GLOB translation the
 // SQLite dialects need because GLOB is the only case-exact pattern operator
@@ -2487,7 +2492,7 @@ const CROSS_FIELD_COMPARISON_OPERATORS: ReadonlySet<string> = new Set([
  * their own `whereIn` / `whereBetween` arms. Only their MEMBERS are inspected —
  * for `$field` (#5041) and, since #5234, for bindability — never their arity:
  * the existing descriptive `$between` refusal stays the one that answers a
- * malformed range. See {@link LIST_COMPARAND_OPERATORS}.
+ * malformed range. See {@link isListComparandOperator}.
  */
 const SCALAR_COMPARAND_OPERATORS: ReadonlySet<string> = new Set([
   '$eq', '$ne', '$gt', '$gte', '$lt', '$lte',
@@ -2569,17 +2574,6 @@ const TEXT_OPERATORS: ReadonlySet<string> = new Set([
   ...LIKE_PATTERN_OPERATORS,
 ]);
 
-/**
- * [#5234] Operators for which an ARRAY is the legitimate comparand, so it is
- * each MEMBER that must be individually compilable.
- *
- * Scoping the member scan to these three is what keeps a scalar operator that
- * received an array answering with its own message ("requires a single
- * comparable value") instead of reporting the first bad member of a list it
- * should never have been given.
- */
-const LIST_COMPARAND_OPERATORS: ReadonlySet<string> = new Set(['$in', '$nin', '$between']);
-
 /**
  * [#5234] Does this value have a faithful rendering as the text of a LIKE
  * pattern?
@@ -2687,10 +2681,13 @@ function assertCompilableComparand(
       if (nowAnchorOf(member) !== null) throw nowAnchorPositionError(field, op, member, index);
       // [#5234] Every member of a list operator's array is a comparand in its
       // own right and gets the same bind test the whole comparand gets. Scoped
-      // to the operators for which an array is legitimate, so a scalar operator
-      // handed an array keeps answering with its own message below.
+      // to the operators for which an array is legitimate (the spec's list
+      // half, {@link isListComparandOperator}), so a scalar operator handed an
+      // array keeps answering with its own message ("requires a single
+      // comparable value") instead of reporting the first bad member of a list
+      // it should never have been given.
       // [#20039] The member when it is an object, else the list that holds it.
-      if (LIST_COMPARAND_OPERATORS.has(op) && !isBindableComparand(member)) {
+      if (isListComparandOperator(op) && !isBindableComparand(member)) {
         throw unbindableListMemberError(field, op, member, index, refusalSubtree(member, value));
       }
     }
 
@@ -163,6 +163,7 @@ import {
   INSTANT_TYPES,
   STRUCTURED_JSON_TYPES,
   filterSubtreeProvenanceOf,
+  isListComparandOperator,
   isMultiValueField,
   markFilterSubtreeProvenance,
 } from '@objectstack/spec/data';
@@ -179,15 +180,14 @@ const NO_MULTI_VALUE_COLUMNS: DeclaredMultiValueColumns = new Set();
 /**
  * The operators whose comparand is a VALUE of the column, compared with the
  * stored value. The drivers put these comparands into the column's storage
- * form; every other operator's operand is left as written.
+ * form; every other operator's operand is left as written. Which of them take
+ * a LIST of values is the spec's answer ({@link isListComparandOperator}), not
+ * a copy kept here.
  */
 const VALUE_COMPARISON_OPERATORS: ReadonlySet<string> = new Set([
   '$eq', '$ne', '$gt', '$gte', '$lt', '$lte', '$in', '$nin', '$between',
 ]);
 
-/** The value-comparison operators whose comparand is a LIST of values. */
-const LIST_COMPARAND_OPERATORS: ReadonlySet<string> = new Set(['$in', '$nin', '$between']);
-
 /** The storage rule a declared type takes, or `undefined` for a non-temporal type. */
 function temporalKindOfDeclaredType(type: string): TemporalComparandKind | undefined {
   if (CALENDAR_DATE_TYPES.has(type)) return 'date';
@@ -412,7 +412,7 @@ function storedComparand(value: unknown, kind: TemporalComparandKind): unknown {
 
 /** A value-comparison operand in its column's storage form, a list member by member. */
 function storedOperand(op: string, value: unknown, kind: TemporalComparandKind): unknown {
-  if (!LIST_COMPARAND_OPERATORS.has(op) || !Array.isArray(value)) return storedComparand(value, kind);
+  if (!isListComparandOperator(op) || !Array.isArray(value)) return storedComparand(value, kind);
   let copy: unknown[] | undefined;
   value.forEach((member, index) => {
     const stored = storedComparand(member, kind);