diff --git a/‎.changeset/20822-f3-route-then-delete.md‎
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diff --git a/‎packages/drivers/driver-memory/src/memory-analytics-20661-lte-whole-day-first.test.ts‎
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diff --git a/‎packages/drivers/driver-memory/src/memory-analytics-shared-lowering-door.test.ts‎
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diff --git a/‎packages/drivers/driver-memory/src/memory-datetime-storage.test.ts‎
Lines changed: 23 additions & 9 deletions b/‎packages/drivers/driver-memory/src/memory-datetime-storage.test.ts‎
Lines changed: 23 additions & 9 deletions
@@ -0,0 +1,13 @@
+---
+'@objectstack/metadata': patch
+'@objectstack/objectql': patch
+'@objectstack/driver-memory': patch
+---
+
+fix: the whole-day bound on a bare `YYYY-MM-DD` upper bound is applied at the seams only — `DatabaseLoader.queryHistory` in driver mode becomes one, the engine seam lowers type-blind for an object with no field map, and `InMemoryDriver` drops its own copy (ADR-0053 D-D1 items 5 and 7, #20822)
+
+Clause-②: no
+
+- **`@objectstack/metadata` — `DatabaseLoader.queryHistory` in driver mode lowers its own filter.** With a raw `IDataDriver` (`MetadataManager.setDatabaseDriver`) the history filter reaches the driver without passing any seam. The loader now runs the shared `lowerFilterCondition` (`@objectstack/spec/data`) on it, typed by the history object it syncs: `until: 'YYYY-MM-DD'` reads `recorded_at < next day`, so every version recorded on that day is kept on every driver, and an instant `until` is kept as written. Engine mode is unchanged (the engine's own `where` seam lowers it). Before this, the whole day was kept only by each driver's own copy of the rule; with `@objectstack/driver-memory`'s copy deleted below, `until` = today would have gone from every version of the day to none.
+- **`@objectstack/objectql` — an object with no field map is lowered type-blind.** The engine's `where` seam (on `find`, `findOne`, `count`, `update`, `delete` and `aggregate`'s `where` / `aggregations[i].filter`) reads the object's declared field map and rewrites a declared `datetime` column only. For an object the registry does not hold there is no declaration to read, and the seam now applies the whole-day rules to every column (a bare-day `$lte` becomes `$lt` the next day, a `$between` splits), as ADR-0053 D-D1 item 7 rules for a seam that cannot read the declared type. It used to leave such an object to each driver's own copy. Visible on `SqlDriver`: a bare-day `$lte` on a non-`datetime` column of an unregistered object that holds ISO instant text now keeps the whole day; a `datetime` or `date` column answers as before. An object with a field map is unchanged.
+- **`@objectstack/driver-memory` — `InMemoryDriver` compiles the comparison it is handed.** Its four copies of the whole-day rule are deleted (the `$lte` and `$between` arms of the filter translator, the `<=` and `between` arms of the AST-node translator). A read through the engine hands it a `where` the engine's seam has already lowered, so on that path a declared `datetime` column keeps the whole named day, and a declared `date` column answers as before. A row-level security `using` filter is not lowered by the engine's seam: the security middleware ANDs it into the query's `where` after that seam has run, and only the RLS compile seam lowers it, rewriting just the columns its field guard declares `datetime`. Two answers converge on what `SqlDriver` already returns (ADR-0053 D-D1 item 7's scope): on a registered object, a bare-day `$lte` / `$between` on a declared `text` column holding ISO instant text, or on a column the object does not declare, is now compared as written, where this driver used to widen it to the whole day. One path narrows outside those two: an RLS `using` policy with a bare-day upper bound, on an object whose declared fields the security plugin cannot resolve, is compiled with no field guard, so the RLS compile seam reads no column as `datetime` and the bound reaches this driver as written, where this driver used to widen it to the whole day; that holds until #20822 group 2 makes the RLS compile seam type-blind when it has no guard. A direct `find()` that passed no seam gets the comparison it wrote (item 5); lower the filter with `lowerFilterCondition` first to keep the whole-day reading.
@@ -18,7 +18,7 @@
  */
 
 import { describe, it, expect } from 'vitest';
-import type { Cube, FilterCondition } from '@objectstack/spec/data';
+import { lowerFilterCondition, type Cube, type FilterCondition, type FilterLoweringOptions } from '@objectstack/spec/data';
 import { InMemoryDriver } from './memory-driver.js';
 import { MemoryAnalyticsService } from './memory-analytics.js';
 
@@ -44,13 +44,28 @@ const CUBE = {
 
 type Declaration = 'undeclared' | 'declared';
 
+const TASK_FIELDS: Record<string, { type: string }> = { created_at: { type: 'datetime' }, made_on: { type: 'date' } };
+
+/**
+ * [#20822 · ADR-0053 D-D1 items 5, 7 and 9, as amended] The `find()` reading is
+ * what the engine's `where` seam hands this driver, since the driver keeps no
+ * whole-day copy of its own: `declared` reads the declared field map (the
+ * typed seam, `datetime` columns only); `undeclared` has no field map to read,
+ * so the seam lowers type-blind (item 7) — the same reading the cube face's
+ * own door gives both.
+ */
+const SEAM: Record<Declaration, FilterLoweringOptions> = {
+  declared: { isDatetimeColumn: (column) => TASK_FIELDS[column]?.type === 'datetime' },
+  undeclared: {},
+};
+
 async function setup(declaration: Declaration, rows: ReadonlyArray<Record<string, unknown>> = CARD_ROWS) {
   const driver = new InMemoryDriver({});
   await driver.connect();
   if (declaration === 'declared') {
     await driver.syncSchema('task', {
       name: 'task',
-      fields: { created_at: { type: 'datetime' }, made_on: { type: 'date' } },
+      fields: TASK_FIELDS,
     });
   }
   for (const row of rows) await driver.create('task', { ...row });
@@ -72,7 +87,7 @@ const whereOf = (sql: string) => /WHERE (.*?)(?: GROUP BY|$)/.exec(sql)?.[1];
 async function answer(declaration: Declaration, where: FilterCondition, rows?: ReadonlyArray<Record<string, unknown>>) {
   const { driver, service } = await setup(declaration, rows);
   return {
-    find: ids(await driver.find('task', { where })),
+    find: ids(await driver.find('task', { where: lowerFilterCondition(where, SEAM[declaration]) })),
     cube: ids((await service.query(cubeQuery(where))).rows),
     echo: whereOf((await service.generateSql(cubeQuery(where))).sql),
   };
@@ -143,7 +158,9 @@ describe('[#20661] the siblings on this face', () => {
       dimensions: ['id'],
       timeDimensions: [{ dimension: 'created_at', dateRange: ['2026-07-01', '2026-07-28'] }],
     } as any);
-    const found = ids(await driver.find('task', { where: { created_at: { $gte: '2026-07-01', $lte: '2026-07-28' } } }));
+    const found = ids(await driver.find('task', {
+      where: lowerFilterCondition({ created_at: { $gte: '2026-07-01', $lte: '2026-07-28' } }, SEAM.declared),
+    }));
     expect(ids(result.rows)).toEqual(found);
     expect(ids(result.rows)).toEqual(['r27', 'r28']);
   });
 
@@ -40,7 +40,13 @@
  */
 
 import { describe, it, expect } from 'vitest';
-import { FILTER_LOGIC_CASES, FILTER_LOGIC_ROWS, type Cube, type FilterCondition } from '@objectstack/spec/data';
+import {
+  FILTER_LOGIC_CASES,
+  FILTER_LOGIC_ROWS,
+  lowerFilterCondition,
+  type Cube,
+  type FilterCondition,
+} from '@objectstack/spec/data';
 import { InMemoryDriver } from './memory-driver.js';
 import { MemoryAnalyticsService } from './memory-analytics.js';
 
@@ -78,10 +84,13 @@ const DAY_ROWS = [
   { id: 'r29', created_at: '2026-07-29T10:00:00.000Z' },
 ];
 
+/** The declared field map `logic_row` syncs — what the engine's typed seam reads. */
+const LOGIC_ROW_FIELDS: Record<string, { type: string }> = { created_at: { type: 'datetime' } };
+
 async function setup(rows: ReadonlyArray<object>) {
   const driver = new InMemoryDriver({});
   await driver.connect();
-  await driver.syncSchema('logic_row', { name: 'logic_row', fields: { created_at: { type: 'datetime' } } });
+  await driver.syncSchema('logic_row', { name: 'logic_row', fields: LOGIC_ROW_FIELDS });
   for (const row of rows) await driver.create('logic_row', { ...(row as Record<string, unknown>) });
   const service = new MemoryAnalyticsService({ driver, cubes: [LOGIC_CUBE] });
   return { driver, service };
@@ -90,11 +99,21 @@ async function setup(rows: ReadonlyArray<object>) {
 const cubeQuery = (where?: FilterCondition) =>
   ({ cube: 'logic', measures: ['count'], dimensions: ['id'], ...(where === undefined ? {} : { where }) }) as any;
 
-/** The live query path, the cube's rows and the echo's WHERE, for one `where`. */
+/**
+ * The live query path, the cube's rows and the echo's WHERE, for one `where`.
+ *
+ * [#20822 · ADR-0053 D-D1 items 5, 7 and 9, as amended] The live query path is
+ * the engine's `where` seam and then this driver, which keeps no whole-day copy
+ * of its own: so `find()` is handed what that TYPED seam hands it — the filter
+ * through the shared lowering, reading {@link LOGIC_ROW_FIELDS}.
+ */
 async function answer(rows: ReadonlyArray<object>, where?: FilterCondition) {
   const { driver, service } = await setup(rows);
+  const seamed = lowerFilterCondition(where, {
+    isDatetimeColumn: (column) => LOGIC_ROW_FIELDS[column]?.type === 'datetime',
+  });
   return {
-    find: ids(await driver.find('logic_row', where === undefined ? {} : { where })),
+    find: ids(await driver.find('logic_row', seamed === undefined ? {} : { where: seamed })),
     cube: ids((await service.query(cubeQuery(where))).rows),
     echo: whereOf((await service.generateSql(cubeQuery(where))).sql),
   };
 
@@ -19,7 +19,7 @@
  */
 
 import { describe, it, expect, beforeEach } from 'vitest';
-import { parseFilterAST } from '@objectstack/spec/data';
+import { lowerFilterCondition, parseFilterAST } from '@objectstack/spec/data';
 import { InMemoryDriver } from './memory-driver.js';
 
 const ids = (rows: any[]) => rows.map((r: any) => r.id).sort();
@@ -35,6 +35,20 @@ const TASK_SCHEMA = {
   },
 };
 
+/**
+ * [#20822 · ADR-0053 D-D1 items 5, 7 and 9, as amended] What a TYPED seam hands
+ * this driver: the filter through the shared lowering, reading
+ * {@link TASK_SCHEMA}'s declared `datetime` columns. The driver keeps no
+ * whole-day copy of its own any more, so a bare-day upper bound in these
+ * windows reaches it already lowered, as on every seam-fed path; the expected
+ * rows are unchanged.
+ */
+const seamed = <T,>(where: T): T =>
+  lowerFilterCondition(where, {
+    isDatetimeColumn: (column) =>
+      (TASK_SCHEMA.fields as Record<string, { type: string } | undefined>)[column]?.type === 'datetime',
+  });
+
 describe('InMemoryDriver Field.datetime storage (#4047)', () => {
   let driver: InMemoryDriver;
 
@@ -79,7 +93,7 @@ describe('InMemoryDriver Field.datetime storage (#4047)', () => {
   it('a date window reaches rows written in BOTH forms', async () => {
     await seedMixed();
     const found = await driver.find('task', {
-      where: { created_at: { $gte: '2026-04-29', $lte: '2026-07-28' } },
+      where: seamed({ created_at: { $gte: '2026-04-29', $lte: '2026-07-28' } }),
     } as any);
     expect(ids(found)).toEqual(['d_midnight', 'd_yesterday', 's_evening', 's_morning']);
   });
@@ -106,25 +120,25 @@ describe('InMemoryDriver Field.datetime storage (#4047)', () => {
     expect(ids(lt)).toEqual(['d_yesterday', 's_old']);
 
     const instant = await driver.find('task', {
-      where: { created_at: { $lte: '2026-07-28T12:00:00.000Z' } },
+      where: seamed({ created_at: { $lte: '2026-07-28T12:00:00.000Z' } }),
     } as any);
     expect(ids(instant)).toEqual(['d_midnight', 'd_yesterday', 's_morning', 's_old']);
   });
 
   it('$between and the array spelling take the same coercion', async () => {
     await seedMixed();
     const between = await driver.find('task', {
-      where: { created_at: { $between: ['2026-04-29', '2026-07-28'] } },
+      where: seamed({ created_at: { $between: ['2026-04-29', '2026-07-28'] } }),
     } as any);
     expect(ids(between)).toEqual(['d_midnight', 'd_yesterday', 's_evening', 's_morning']);
 
     // [#5158] The authored array form, lowered the declared way. The INFIX
     // join (`[condA, 'and', condB]`) has no lowering at all and is refused at
     // the door; the declared spelling of "both bounds" is the prefix group.
     const array = await driver.find('task', {
-      where: parseFilterAST(
+      where: seamed(parseFilterAST(
         ['and', ['created_at', '>=', '2026-04-29'], ['created_at', '<=', '2026-07-28']],
-      ) as any,
+      )) as any,
     } as any);
     expect(ids(array)).toEqual(['d_midnight', 'd_yesterday', 's_evening', 's_morning']);
   });
@@ -145,7 +159,7 @@ describe('InMemoryDriver Field.datetime storage (#4047)', () => {
     await seeded.syncSchema('task', TASK_SCHEMA);
 
     const found = await seeded.find('task', {
-      where: { created_at: { $gte: '2026-07-28', $lte: '2026-07-28' } },
+      where: seamed({ created_at: { $gte: '2026-07-28', $lte: '2026-07-28' } }),
     } as any);
     expect(ids(found)).toEqual(['i_date', 'i_iso']);
   });
@@ -162,7 +176,7 @@ describe('InMemoryDriver Field.datetime storage (#4047)', () => {
     // …and the converged value is reachable by a date window, which is the
     // point of converging it.
     const found = await driver.find('task', {
-      where: { due_at: { $gte: '2026-07-28', $lte: '2026-07-28' } },
+      where: seamed({ due_at: { $gte: '2026-07-28', $lte: '2026-07-28' } }),
     } as any);
     expect(ids(found)).toEqual(['u1']);
   });
@@ -187,7 +201,7 @@ describe('InMemoryDriver Field.datetime storage (#4047)', () => {
     expect(onObj!.created_on).toBe('2026-07-28');
 
     const found = await driver.find('task', {
-      where: { created_on: { $gte: '2026-04-29', $lte: '2026-07-28' } },
+      where: seamed({ created_on: { $gte: '2026-04-29', $lte: '2026-07-28' } }),
     } as any);
     expect(ids(found)).toEqual(['on_mid', 'on_obj']);
   });