@@ -310,8 +310,10 @@ describe('objectui#4970 — element:text.content / element:button.label declare
     // these arms honest rather than copied from the issue — #4970's own table
     // was measured at the 17.0.0-rc.6 pin, and the answer had to be re-taken
     // before the declarations moved.
-    expect(specAcceptedArms(ElementTextPropsSchema, 'content')).toEqual(['string', 'object']);
-    expect(specAcceptedArms(ElementButtonPropsSchema, 'label')).toEqual(['string', 'object']);
+    // Membership (#26238): the arms the declarations below must carry. An arm
+    // the spec adds is caught by the derived comparisons, not by a literal.
+    expect(specAcceptedArms(ElementTextPropsSchema, 'content')).toEqual(expect.arrayContaining(['string', 'object']));
+    expect(specAcceptedArms(ElementButtonPropsSchema, 'label')).toEqual(expect.arrayContaining(['string', 'object']));
   });
 
   it('`element:text.content` accepts the inline translation map', () => {
@@ -417,26 +419,20 @@ describe('objectui#5717 — element:text_input label / placeholder / description
     // Measured on the `@objectstack/spec` 17.1.0 pin — the same discipline the
     // #4970 block adopted, and the reason these arms are honest rather than
     // copied from the card that reported them.
-    expect(specAcceptedArms(ElementTextInputPropsSchema, 'label')).toEqual(['string', 'object']);
-    expect(specAcceptedArms(ElementTextInputPropsSchema, 'placeholder')).toEqual([
-      'string',
-      'object',
-    ]);
-    expect(specAcceptedArms(ElementTextInputPropsSchema, 'description')).toEqual([
-      'string',
-      'object',
-    ]);
+    // Membership (#26238), as in the #4970 block above.
+    for (const key of ['label', 'placeholder', 'description']) {
+      expect(specAcceptedArms(ElementTextInputPropsSchema, key), key).toEqual(expect.arrayContaining(['string', 'object']));
+    }
   });
 
   it('the sibling key whose contract has NO object arm is measured the same way', () => {
     // The separation asserted from the CONTRACT rather than from the
     // declaration, so "why is defaultValue different" is answered by evidence
     // in the same vocabulary. Without this line the per-key control below reads
     // as a convention; with it, it reads as the contract.
-    expect(specAcceptedArms(ElementTextInputPropsSchema, 'defaultValue')).toEqual([
-      'string',
-      'number',
-    ]);
+    const defaultValueArms = specAcceptedArms(ElementTextInputPropsSchema, 'defaultValue');
+    expect(defaultValueArms).toEqual(expect.arrayContaining(['string', 'number']));
+    expect(defaultValueArms).not.toContain('object');
   });
 
   it('`element:text_input.label` accepts the inline translation map', () => {
 
@@ -57,7 +57,7 @@ describe('objectui#3846 — the trust-tier label map answers to the spec enum',
   it('covers exactly the tiers PluginRuntimeSchema declares', () => {
     // The producer's own list, read from the schema rather than retyped.
     const declared = [...PluginRuntimeSchema.options].sort();
-    expect(declared).toEqual(['node', 'sandbox', 'worker']);
+    for (const tier of ['node', 'sandbox', 'worker']) expect(declared).toContain(tier);
     expect(Object.keys(RUNTIME_FALLBACK).sort()).toEqual(declared);
   });
 
 
@@ -123,10 +123,11 @@ const DECORATED_SERVED = {
 // ---------------------------------------------------------------------------
 
 describe('the instrument', () => {
-  it('is the spec that names the decorations, and it names exactly these two', () => {
+  it('is the spec that names the decorations, and it names these two', () => {
     // Stated before any claim about the fix. If this list grows, the pins below
-    // follow it without an edit — that is why they read it rather than spell it.
-    expect([...METADATA_READ_DECORATIONS]).toEqual(['_diagnostics', '_draft']);
+    // follow it without an edit — that is why they read it rather than spell it,
+    // and why this asserts membership rather than the whole list (#26238).
+    expect([...METADATA_READ_DECORATIONS]).toEqual(expect.arrayContaining(['_diagnostics', '_draft']));
   });
 
   it('refuses each decoration BY NAME — the defect, on the schema', () => {
 
@@ -101,6 +101,26 @@ const unrecognizedKeys = (result: { success: boolean; error?: unknown }): string
         .filter((i) => i.code === 'unrecognized_keys')
         .flatMap((i) => i.keys ?? []));
 
+/**
+ * Levenshtein distance, case-insensitive. The near-spelling claims below are
+ * stated over the accept set with this, rather than through a key count that
+ * every unrelated spec adoption moves (#26238).
+ */
+function editDistance(a: string, b: string): number {
+  const [x, y] = [a.toLowerCase(), b.toLowerCase()];
+  const row = Array.from({ length: y.length + 1 }, (_, j) => j);
+  for (let i = 1; i <= x.length; i++) {
+    let diagonal = row[0];
+    row[0] = i;
+    for (let j = 1; j <= y.length; j++) {
+      const above = row[j];
+      row[j] = Math.min(above + 1, row[j - 1] + 1, diagonal + (x[i - 1] === y[j - 1] ? 0 : 1));
+      diagonal = above;
+    }
+  }
+  return row[y.length];
+}
+
 /** A base document `ObjectSchema` accepts, for probing one key at a time. */
 const BASE = { name: 'account', label: 'Account', fields: { n: { type: 'text', label: 'N' } } };
 
@@ -137,37 +157,22 @@ describe('objectui#6238 · the schema oracle — both tombstone keys are refused
     // key-name gate could never have stated it. `enable` passes on the name and
     // fails on the value, which is why this is objectui#4687's resolution
     // (delete the declaration) rather than objectui#6041's (rename it).
-    // 43, not the 42 this pin carried against 17.2.0: `@objectstack/spec` 17.3.0
-    // ADOPTED `editMode` (measured — gained set exactly `['editMode']`, lost set
-    // empty). That adoption is unrelated to this file's subject and is pinned in
-    // `packages/types/src/__tests__/object-schema-metadata-spec-derivation.test.ts`;
-    // the count rides here only as the corpus guard for the membership claims
-    // below, so it is re-pointed, not weakened.
-    // 44 at `@objectstack/spec` 17.6.0, which adopted `imageField` (measured against
-    // a 17.5.0 control: gained set exactly `['imageField']`, lost set empty;
-    // objectui#11438). Re-pointed as the 17.3.0 adoption was, not weakened.
-    // 45 at `@objectstack/spec` 18.0.0-next.0, which adopted `attachedOnRead`
-    // (measured against a 17.7.0 control: gained set exactly `['attachedOnRead']`,
-    // lost set empty; objectui#12030). Re-pointed the same way.
-    // 46 on the objectstack `main` pin after 18.0.0-next.3, which adopted
-    // `defaultRowScope` (objectstack#24398; measured against the next.3 pin: the
-    // one top-level key `ObjectSchema` gains between the two commits, none lost;
-    // objectui#12971). Re-pointed the same way.
-    // 47 at `@objectstack/spec` 18.1.0, which adopted `membershipKeys`
-    // (objectstack#25513; measured against the 915e9404 pin: the spec's own
-    // `authorable-surface/data.json` gains exactly `data/Object:membershipKeys`
-    // between the two commits, none lost; objectui#13440). Re-pointed the same way.
-    // 48 on the objectstack `main` pin after objectstack#26005 (5e113b39), which adopted
-    // `sharing` (measured against its parent fbb75998: gained set exactly `['sharing']`,
-    // lost set empty; unchanged at 43b47156). Re-pointed the same way.
+    // The membership claims are asserted by name over the accept set; an exact
+    // key count used to stand in for them and was re-pointed six times by
+    // unrelated spec adoptions (42 → 48), so it is gone (#26238).
     const accept = new Set(Object.keys(ObjectSchema.shape as Record<string, unknown>));
-    expect(accept.size).toBe(48);
     expect(accept.has('enable')).toBe(true);
     expect(accept.has('enabled')).toBe(false);
     expect(accept.has('_deleted')).toBe(false);
     for (const key of ['disabled', 'active', 'isActive', 'deleted', 'isDeleted', 'softDeleted']) {
       expect(accept.has(key), `ObjectSchema unexpectedly accepts \`${key}\``).toBe(false);
     }
+    // No near-spelling of either tombstone key is accepted, except `enable`,
+    // whose VALUE is what refuses the rename (asserted next).
+    const nearSpellings = [...accept].filter(
+      (key) => key !== 'enable' && ['enabled', '_deleted'].some((retired) => editDistance(key, retired) <= 2),
+    );
+    expect(nearSpellings, 'ObjectSchema accepts a near-spelling of a tombstone key').toEqual([]);
 
     const asBoolean = ObjectSchema.safeParse({ ...BASE, enable: false });
     expect(asBoolean.success).toBe(false);
 
@@ -19,9 +19,8 @@
  * shapes: `toObjectPayload` builds it and `saveObject` PUTs it whole to
  * `PUT /api/v1/meta/object/:name`.
  *
- * Measured against the installed `@objectstack/spec` (ESM build), whose
- * `ObjectSchema` accept set is 43 keys at 17.3.0 (42 at 17.2.0, when this file
- * was written; the one gained key is `editMode`, unrelated to the three below):
+ * Measured against the installed `@objectstack/spec` (ESM build), at 17.2.0
+ * when this file was written:
  *
  *   ObjectSchema.safeParse({ ...base, group: 'Sales' })  => unrecognized_keys ["group"]
  *   ObjectSchema.safeParse({ ...base, sortOrder: 3 })    => unrecognized_keys ["sortOrder"]
@@ -57,6 +56,26 @@ import { ObjectStackAdapter } from '@object-ui/data-objectstack';
 import type { ObjectDefinition } from '@object-ui/types';
 import { MetadataService } from './MetadataService';
 
+/**
+ * Levenshtein distance, case-insensitive. The no-near-spelling claim below is
+ * stated over the accept set with this, rather than through a key count that
+ * every unrelated spec adoption moves (#26238).
+ */
+function editDistance(a: string, b: string): number {
+  const [x, y] = [a.toLowerCase(), b.toLowerCase()];
+  const row = Array.from({ length: y.length + 1 }, (_, j) => j);
+  for (let i = 1; i <= x.length; i++) {
+    let diagonal = row[0];
+    row[0] = i;
+    for (let j = 1; j <= y.length; j++) {
+      const above = row[j];
+      row[j] = Math.min(above + 1, row[j - 1] + 1, diagonal + (x[i - 1] === y[j - 1] ? 0 : 1));
+      diagonal = above;
+    }
+  }
+  return row[y.length];
+}
+
 /** The bodies of every PUT the SDK issued, exactly as they went over the wire. */
 function makeCapturingAdapter() {
   const puts: Array<Record<string, unknown>> = [];
@@ -153,36 +172,23 @@ describe('the instrument', () => {
   });
 
   it('has no near-spelling for any of them — unlike objectui#6041, nothing here is a rename', () => {
-    // 43 at `@objectstack/spec` 17.3.0, which adopted `editMode` (measured —
-    // gained set exactly `['editMode']`, lost set empty). The count is this
-    // file's corpus guard, not its subject; every claim it guards is below and
-    // unchanged.
-    // 44 at `@objectstack/spec` 17.6.0, which adopted `imageField` (measured against
-    // a 17.5.0 control: gained set exactly `['imageField']`, lost set empty;
-    // objectui#11438). Re-pointed as the 17.3.0 adoption was, not weakened.
-    // 45 at `@objectstack/spec` 18.0.0-next.0, which adopted `attachedOnRead`
-    // (measured against a 17.7.0 control: gained set exactly `['attachedOnRead']`,
-    // lost set empty; objectui#12030). Re-pointed the same way.
-    // 46 on the objectstack `main` pin after 18.0.0-next.3, which adopted
-    // `defaultRowScope` (objectstack#24398; measured against the next.3 pin: the
-    // one top-level key `ObjectSchema` gains between the two commits, none lost;
-    // objectui#12971). Re-pointed the same way.
-    // 47 at `@objectstack/spec` 18.1.0, which adopted `membershipKeys`
-    // (objectstack#25513; measured against the 915e9404 pin: the spec's own
-    // `authorable-surface/data.json` gains exactly `data/Object:membershipKeys`
-    // between the two commits, none lost; objectui#13440). Re-pointed the same way.
-    // 48 on the objectstack `main` pin after objectstack#26005 (5e113b39), which adopted
-    // `sharing` (measured against its parent fbb75998: gained set exactly `['sharing']`,
-    // lost set empty; unchanged at 43b47156). Re-pointed the same way.
+    // The claims are asserted by name over the accept set; an exact key count
+    // used to stand in for them and was re-pointed six times by unrelated spec
+    // adoptions (42 → 48), so it is gone (#26238).
     const accept = new Set(Object.keys(ObjectSchema.shape as Record<string, unknown>));
-    expect(accept.size).toBe(48);
     // `fieldGroups` is the only grouping key on the object, and it groups the
     // FIELDS INSIDE one object — it is not a category for objects themselves,
     // so `group` has no mapping target here.
     expect(accept.has('fieldGroups')).toBe(true);
     for (const key of ['group', 'sortOrder', 'relationships', 'order', 'category', 'sortField']) {
       expect(accept.has(key), `ObjectSchema unexpectedly accepts \`${key}\``).toBe(false);
     }
+    // Nothing in the accept set is within two edits of a resolved key, so none
+    // of the three was a misspelling of a key the schema does declare.
+    const nearSpellings = [...accept].filter((key) =>
+      ['group', 'sortOrder', 'relationships'].some((resolved) => editDistance(key, resolved) <= 2),
+    );
+    expect(nearSpellings, 'ObjectSchema accepts a near-spelling of a resolved key').toEqual([]);
   });
 });
 
 
@@ -30,8 +30,11 @@ describe('resolveFormViewLayout carries the authored modalSize (objectui#12803)'
     });
   });
 
-  it('the cases above are the whole spec enum', () => {
-    expect(FormViewSchema.shape.modalSize.unwrap().options).toEqual(['sm', 'default', 'lg', 'xl', 'full']);
+  it('every case above is a size the spec enum allows', () => {
+    // Membership, not the whole enum: a size the spec adds later is copied by
+    // the same pass-through and needs no edit here (#26238).
+    const allowed: readonly string[] = FormViewSchema.shape.modalSize.unwrap().options;
+    for (const size of ['sm', 'default', 'lg', 'xl', 'full']) expect(allowed).toContain(size);
   });
 
   it('copies modalSize beside sections, and from the legacy formViews.default', () => {
 
@@ -216,19 +216,15 @@ describe('the emitted lane key is the one `@objectstack/spec` declares (objectui
     expect(unrecognized(complete({ groupBy: 'stage' }))).toContain('groupBy');
   });
 
-  it('declares exactly the four keys this file reasons about', () => {
+  it('declares the lane key and neither retired spelling — the premise of the arms above', () => {
     // A tripwire on the premise itself: if a future spec bump declares
-    // `groupBy` (or drops `groupByField`), the arms above stop meaning what
-    // they say and this reddens first. It fired at the 17.5.0 bump
-    // (objectui#11073) for a key that is NOT a lane spelling: 17.5.0 declares
-    // `titleField` (the card-title binding, falling back to the record display
-    // name). Re-read: every arm above is about the lane key and still holds, so
-    // the pin moves from three keys to four and nothing else does.
-    expect(Object.keys((KanbanConfigSchema as any).shape).sort()).toEqual([
-      'columns',
-      'groupByField',
-      'summarizeField',
-      'titleField',
-    ]);
+    // `groupBy` or `groupField` (or drops `groupByField`), the arms above stop
+    // meaning what they say and this reddens first. Asserted by name: the
+    // exact key list it used to pin fired at 17.5.0 for `titleField`, a key
+    // that is not a lane spelling at all (#26238).
+    const keys = Object.keys((KanbanConfigSchema as any).shape);
+    expect(keys).toContain('groupByField');
+    expect(keys).not.toContain('groupField');
+    expect(keys).not.toContain('groupBy');
   });
 });
@@ -62,7 +62,13 @@ describe('KIND_TO_RECORD_LOOKUP is derived from APPROVER_VALUE_SOURCES (objectui
     // the boundary to be re-drawn deliberately.
     for (const kind of EXPECTED_KINDS) {
       const source = APPROVER_VALUE_SOURCES[kind as keyof typeof APPROVER_VALUE_SOURCES] as Record<string, unknown>;
-      expect(Object.keys(source).sort()).toEqual(['object', 'source', 'valueField']);
+      const specKeys = Object.keys(source);
+      for (const key of ['object', 'source', 'valueField']) expect(specKeys).toContain(key);
+      // By name, not as the spec's whole key list (#26238): none of the keys
+      // this package owns for presentation is published by the spec.
+      const presentation = Object.keys(KIND_TO_RECORD_LOOKUP[kind]!).filter((k) => k !== 'object' && k !== 'valueField');
+      expect(presentation).toContain('displayField');
+      for (const key of presentation) expect(specKeys, `the spec now publishes \`${key}\``).not.toContain(key);
       expect(KIND_TO_RECORD_LOOKUP[kind]!.displayField).toBeTruthy();
     }
   });
 
@@ -45,7 +45,8 @@ describe('PACKAGE_SOURCES is the closed set the spec declares (objectui#12790)',
 
   it('equals the `source` options on both stage branches of the served row', () => {
     const branches = InstalledPackageAtEitherStageSchema.options;
-    expect(branches).toHaveLength(2);
+    // Non-vacuity floor for the loop; the branch count is the spec's (#26238).
+    expect(branches.length).toBeGreaterThan(0);
     for (const branch of branches) {
       expect(sorted(branch.shape.source.options)).toEqual(sorted(PACKAGE_SOURCES));
     }
 
@@ -108,6 +108,7 @@ describe('ActionPreview placement frames', () => {
     // re-added the member would leave the pins above passing while the designer
     // silently stopped previewing a location the product does declare.
     expect(ACTION_LOCATIONS as readonly string[]).not.toContain('global_nav');
-    expect(ACTION_LOCATIONS.length).toBe(6);
+    // Control: the vocabulary is a reading, not an empty list (#26238).
+    expect(ACTION_LOCATIONS.length).toBeGreaterThan(0);
   });
 });
Original file line number	Diff line number	Diff line change
`@@ -45,7 +45,8 @@ describe('PACKAGE_SOURCES is the closed set the spec declares (objectui#12790)',`
`45`	`45`
`46`	`46`	it('equals the `source` options on both stage branches of the served row', () => {
`47`	`47`	`const branches = InstalledPackageAtEitherStageSchema.options;`
`48`		`- expect(branches).toHaveLength(2);`
	`48`	`+ // Non-vacuity floor for the loop; the branch count is the spec's (#26238).`
	`49`	`+ expect(branches.length).toBeGreaterThan(0);`
`49`	`50`	`for (const branch of branches) {`
`50`	`51`	`expect(sorted(branch.shape.source.options)).toEqual(sorted(PACKAGE_SOURCES));`
`51`	`52`	`}`