diff --git a/.changeset/adr-0072-nav-target-refs.md b/.changeset/adr-0072-nav-target-refs.md
new file mode 100644
index 0000000000..412d28afb8
--- /dev/null
+++ b/.changeset/adr-0072-nav-target-refs.md
@@ -0,0 +1,28 @@
+---
+'@objectstack/lint': minor
+---
+
+Nav targets that are not object names (`page` / `report` / `dashboard`) are now checked at author time — closing a hole *inside* an existing check.
+
+`defineStack`'s `validateCrossReferences` already validates these three. But each arm is gated on the collection being non-empty:
+
+```ts
+if (nav.type === 'page' && typeof nav.pageName === 'string'
+    && pageNames.size > 0 && !pageNames.has(nav.pageName)) { … }
+```
+
+So a stack that declares **no `pages` at all** has its page-nav check silently switched off, and `{ type: 'page', pageName: 'anything' }` sails through. That is exactly the state a stack is in when the target was never written — the most likely way to reach this bug, not the least.
+
+Note the asymmetry the guard creates. The `object` arm of the same block has no size gate: it errors unless the item carries `requiresObject`, an **explicit** opt-in to "another package provides this". Objects have to say so out loud; pages, reports and dashboards got an implicit exemption that depends on an unrelated property of the stack.
+
+`validateNavTargetRefs` joins `REFERENCE_INTEGRITY_RULES` (16 → 17), so it runs on `validate`, `lint` and `compile` with no CLI rewiring. It reports **warning**, not error, and that ceiling is deliberate: `validate-object-references` can say ERROR for an unresolved *object* because it resolves against the curated `PLATFORM_PROVIDED_OBJECT_NAMES` registry and knows which cross-package names are real. No such registry exists for pages, reports or dashboards, so "unresolved" cannot honestly be distinguished from "provided by a package we cannot see". Fixing the guard by tightening the parse-time throw was the other option and was rejected: a throw has no escape hatch for a legitimately cross-package page, and ADR-0072 D1's rule is that one dead finding costs more than a missed one. When `defineStack`'s check *is* live it still hard-fails first; this rule is what speaks when that check has switched itself off, and it says so in the message.
+
+**Three nav types are deliberately NOT covered, each verified rather than assumed:**
+
+- **`action`** — already owned by `validate-action-name-refs`, which walks app navigation explicitly. Adding it here would double-report.
+- **`component`** — a verified NON-rule. An unregistered `componentRef` does *not* fail silently: `ComponentNavView` renders a named diagnostic ("Component not registered … Ensure the plugin that provides this surface is installed and has called `registerAppComponent()`"), and the registry exists precisely so plugin-provided surfaces may legitimately be absent. Flagging it would break valid plugin nav and prescribe a fix for something already reported better at runtime.
+- **`url`** — external by definition.
+
+Both NON-rules are pinned by tests, so "completing" the module by adding them fails there first.
+
+**Scope honesty:** all 35 authored nav page/report/dashboard targets in this repo resolve, so this closes a latent hole rather than a shipped bug. The rule was proven to go red and then green through the real `validateReferenceIntegrity` entry point on a known-bad stack, not only in unit tests — a green check that has never been made to fail is the recurring defect this campaign keeps finding in its own instruments.
diff --git a/packages/lint/src/index.ts b/packages/lint/src/index.ts
index 3edb952416..3bc31b9758 100644
--- a/packages/lint/src/index.ts
+++ b/packages/lint/src/index.ts
@@ -205,6 +205,13 @@ export {
 } from './validate-object-references.js';
 export type { ObjectRefFinding, ObjectRefSeverity } from './validate-object-references.js';
 
+// [ADR-0072] The non-object nav targets (page/report/dashboard). Restores the
+// coverage `defineStack`'s cross-reference block switches off when the stack
+// declares none of that collection. `action` and `component` are deliberately
+// NOT members — see the module doc for the verification behind each.
+export { validateNavTargetRefs, NAV_TARGET_UNRESOLVED } from './validate-nav-target-refs.js';
+export type { NavTargetRefFinding, NavTargetRefSeverity } from './validate-nav-target-refs.js';
+
 export {
   validateSearchableFields,
   SEARCHABLE_FIELD_UNKNOWN,
diff --git a/packages/lint/src/reference-integrity-suite.test.ts b/packages/lint/src/reference-integrity-suite.test.ts
index 7ae1b17586..5e79bbe482 100644
--- a/packages/lint/src/reference-integrity-suite.test.ts
+++ b/packages/lint/src/reference-integrity-suite.test.ts
@@ -21,6 +21,7 @@ describe('reference-integrity suite — membership', () => {
       'validatePageFieldBindings',
       'validateChartBindings',
       'validateNavAccess',
+      'validateNavTargetRefs',
       'validateTranslationReferences',
       'validateFlowTemplatePaths',
       'validateAiSurfaceAffinity',
diff --git a/packages/lint/src/reference-integrity-suite.ts b/packages/lint/src/reference-integrity-suite.ts
index 2f77eb1c86..7fb13532ce 100644
--- a/packages/lint/src/reference-integrity-suite.ts
+++ b/packages/lint/src/reference-integrity-suite.ts
@@ -60,6 +60,7 @@ import { validateActionNameRefs } from './validate-action-name-refs.js';
 import { validatePageFieldBindings } from './validate-page-field-bindings.js';
 import { validateChartBindings } from './validate-chart-bindings.js';
 import { validateNavAccess } from './validate-nav-access.js';
+import { validateNavTargetRefs } from './validate-nav-target-refs.js';
 import { validateTranslationReferences } from './validate-translation-references.js';
 import { validateFlowTemplatePaths } from './validate-flow-template-paths.js';
 import { validateAiSurfaceAffinity } from './validate-ai-surface-affinity.js';
@@ -111,6 +112,13 @@ export const REFERENCE_INTEGRITY_RULES: readonly ReferenceIntegrityRule[] = [
   { name: 'validatePageFieldBindings', run: validatePageFieldBindings },
   { name: 'validateChartBindings', run: validateChartBindings },
   { name: 'validateNavAccess', run: validateNavAccess },
+  // Nav targets that are NOT object names — page/report/dashboard. Restores the
+  // coverage `defineStack`'s own cross-reference block switches off whenever the
+  // stack declares none of that collection (`pageNames.size > 0 && …`), which is
+  // exactly the state a stack is in when the target was never written.
+  // `action` is deliberately absent (validateActionNameRefs owns it) and so is
+  // `component` (an unregistered ref renders a named diagnostic, not silence).
+  { name: 'validateNavTargetRefs', run: validateNavTargetRefs },
   { name: 'validateTranslationReferences', run: validateTranslationReferences },
   { name: 'validateFlowTemplatePaths', run: validateFlowTemplatePaths },
   { name: 'validateAiSurfaceAffinity', run: validateAiSurfaceAffinity },
diff --git a/packages/lint/src/validate-nav-target-refs.test.ts b/packages/lint/src/validate-nav-target-refs.test.ts
new file mode 100644
index 0000000000..8b594470fd
--- /dev/null
+++ b/packages/lint/src/validate-nav-target-refs.test.ts
@@ -0,0 +1,139 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * Tests for the non-object nav-target rule (ADR-0072).
+ *
+ * Two of these are the load-bearing ones:
+ *
+ * 1. The **empty-collection** case. That is the whole reason this rule exists:
+ *    `defineStack`'s own check is gated on `pageNames.size > 0`, so a stack with
+ *    no `pages` has its page-nav validation switched off. If someone "optimises"
+ *    this rule by skipping stacks with no pages, that test goes red.
+ * 2. The **deliberate NON-members** (`component`, `action`). Each was verified,
+ *    not assumed — `component` renders a named "Component not registered"
+ *    diagnostic rather than failing silently, and `action` is already owned by
+ *    `validate-action-name-refs`. Flagging either would be a false prescription
+ *    or a duplicate report, and these tests are where that attempt fails first.
+ */
+
+import { describe, expect, it } from 'vitest';
+
+import { validateNavTargetRefs, NAV_TARGET_UNRESOLVED } from './validate-nav-target-refs.js';
+
+const app = (items: unknown[]) => ({ apps: [{ name: 'ops', navigation: items }] });
+
+describe('validateNavTargetRefs — the gap defineStack leaves', () => {
+  it('flags a page target when the stack declares NO pages (the size>0 hole)', () => {
+    const [f] = validateNavTargetRefs(app([{ id: 'n1', type: 'page', pageName: 'missing_page' }]));
+    expect(f.rule).toBe(NAV_TARGET_UNRESOLVED);
+    expect(f.severity).toBe('warning');
+    expect(f.path).toBe('apps[0].navigation[0].pageName');
+    expect(f.where).toBe('app "ops" · nav "n1"');
+    // The message must say WHY nothing else caught it, or the author has no
+    // way to know this rule is the only thing speaking.
+    expect(f.message).toContain('NO pages at all');
+    expect(f.message).toContain('size > 0');
+  });
+
+  it('flags a page target when pages exist but the name is wrong', () => {
+    const findings = validateNavTargetRefs({
+      ...app([{ id: 'n1', type: 'page', pageName: 'typo' }]),
+      pages: [{ name: 'real_page' }],
+    });
+    expect(findings).toHaveLength(1);
+    expect(findings[0].message).not.toContain('NO pages at all');
+  });
+
+  it('is silent when the target resolves', () => {
+    expect(validateNavTargetRefs({
+      ...app([{ id: 'n1', type: 'page', pageName: 'real_page' }]),
+      pages: [{ name: 'real_page' }],
+    })).toEqual([]);
+  });
+
+  it.each([
+    ['report', 'reportName', 'reports'],
+    ['dashboard', 'dashboardName', 'dashboards'],
+  ])('covers %s targets too', (type, prop, collection) => {
+    expect(validateNavTargetRefs(app([{ id: 'x', type, [prop]: 'nope' }]))).toHaveLength(1);
+    expect(validateNavTargetRefs({
+      ...app([{ id: 'x', type, [prop]: 'ok' }]),
+      [collection]: [{ name: 'ok' }],
+    })).toEqual([]);
+  });
+
+  it('walks nested children — an `object` item carries them too, not just a group', () => {
+    const findings = validateNavTargetRefs(app([
+      { id: 'grp', type: 'object', objectName: 'task', children: [
+        { id: 'deep', type: 'page', pageName: 'missing' },
+      ] },
+    ]));
+    expect(findings).toHaveLength(1);
+    expect(findings[0].path).toBe('apps[0].navigation[0].children[0].pageName');
+  });
+
+  it('walks the `areas[]` container, not just `navigation`', () => {
+    const findings = validateNavTargetRefs({
+      apps: [{ name: 'ops', areas: [{ name: 'a', items: [{ id: 'n', type: 'page', pageName: 'missing' }] }] }],
+    });
+    expect(findings).toHaveLength(1);
+    expect(findings[0].path).toBe('apps[0].areas[0].items[0].pageName');
+  });
+
+  it('skips interpolated targets — they resolve at render time (ADR-0072 D1)', () => {
+    expect(validateNavTargetRefs(app([
+      { id: 'n', type: 'page', pageName: '${ctx.page}' },
+      { id: 'm', type: 'page', pageName: '{dynamic}' },
+    ]))).toEqual([]);
+  });
+});
+
+describe('the deliberate NON-members — each verified, not assumed', () => {
+  it('does NOT flag `component` — an unregistered ref is reported loudly at runtime', () => {
+    // ComponentNavView renders "Component not registered … Ensure the plugin
+    // that provides this surface is installed and has called
+    // registerAppComponent()". The registry exists so plugin surfaces MAY be
+    // absent; flagging this would break valid plugin nav and duplicate a
+    // better runtime message.
+    expect(validateNavTargetRefs(app([
+      { id: 'n', type: 'component', componentRef: 'nobody:nothing' },
+    ]))).toEqual([]);
+  });
+
+  it('does NOT flag `action` — validate-action-name-refs already walks app nav', () => {
+    expect(validateNavTargetRefs(app([
+      { id: 'n', type: 'action', actionDef: { actionName: 'ghost_action' } },
+    ]))).toEqual([]);
+  });
+
+  it('does NOT flag `url` — external by definition', () => {
+    expect(validateNavTargetRefs(app([
+      { id: 'n', type: 'url', url: 'https://example.com' },
+    ]))).toEqual([]);
+  });
+});
+
+describe('robustness', () => {
+  it('never throws on junk or partial stacks', () => {
+    for (const junk of [
+      undefined, null, 42, 'x', [], {},
+      { apps: 'nope' }, { apps: [null, 7] },
+      { apps: [{ name: 'a', navigation: 'nope' }] },
+      { apps: [{ navigation: [null, 3, { type: 'page' }] }] },
+      { apps: [{ name: 'a', areas: 'nope' }] },
+      app([{ type: 'page' }]), // no pageName at all
+    ]) {
+      expect(() => validateNavTargetRefs(junk)).not.toThrow();
+    }
+  });
+
+  it('emits nothing for a stack with no apps', () => {
+    expect(validateNavTargetRefs({ pages: [{ name: 'p' }] })).toEqual([]);
+  });
+
+  it('every finding carries a usable hint', () => {
+    for (const f of validateNavTargetRefs(app([{ id: 'n', type: 'page', pageName: 'x' }]))) {
+      expect(f.hint.length).toBeGreaterThan(20);
+    }
+  });
+});
diff --git a/packages/lint/src/validate-nav-target-refs.ts b/packages/lint/src/validate-nav-target-refs.ts
new file mode 100644
index 0000000000..9daec0b113
--- /dev/null
+++ b/packages/lint/src/validate-nav-target-refs.ts
@@ -0,0 +1,175 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * [ADR-0072 — reference resolvability] App-navigation targets that are not
+ * object names: `page`, `report`, `dashboard`.
+ *
+ * ## The hole this closes is inside an EXISTING check, not a missing one
+ *
+ * `defineStack`'s `validateCrossReferences` already validates these three
+ * (`stack.zod.ts`, the "Validate app navigation → object/dashboard/page/report
+ * references" block). But each of the three is guarded on the collection being
+ * non-empty:
+ *
+ * ```ts
+ * if (nav.type === 'page' && typeof nav.pageName === 'string'
+ *     && pageNames.size > 0 && !pageNames.has(nav.pageName)) { … }
+ * ```
+ *
+ * So a stack that declares **no `pages` at all** has its page-nav check
+ * silently switched off, and `{ type: 'page', pageName: 'anything' }` sails
+ * through. That is precisely the state a stack is in when the target was never
+ * written — the most likely way to get here, not the least.
+ *
+ * Note the asymmetry the guard creates. The `object` arm of the same block has
+ * no size gate: it errors unless the item carries `requiresObject`, an
+ * EXPLICIT opt-in to "another package provides this". Objects therefore say so
+ * out loud; pages, reports and dashboards get an implicit exemption that
+ * depends on an unrelated property of the stack.
+ *
+ * This rule restores the coverage with the ADR-0072 severity posture rather
+ * than by tightening the parse-time throw — a throw has no escape hatch for a
+ * legitimately cross-package page, and ADR-0072 D1's rule is that one dead
+ * finding costs more than a missed one.
+ *
+ * ## Severity: warning, and why it is not error
+ *
+ * `validate-object-references` can say ERROR for an unresolved *object*
+ * because it resolves against a curated `PLATFORM_PROVIDED_OBJECT_NAMES`
+ * registry — it knows which cross-package names are real. No such registry
+ * exists for pages, reports or dashboards, so "unresolved" genuinely cannot be
+ * distinguished from "provided by a package we cannot see from here".
+ * Advisory is the honest ceiling. When `defineStack`'s own check is live (the
+ * collection is non-empty) it still hard-fails first; this rule is what speaks
+ * when that check has switched itself off.
+ *
+ * ## Deliberately NOT covered — each verified, not assumed
+ *
+ * - **`action`** (`actionDef.actionName`) — already owned by
+ *   `validate-action-name-refs`, which walks app navigation explicitly. Adding
+ *   it here would double-report the same finding.
+ * - **`component`** (`componentRef`) — verified a NON-rule. An unregistered ref
+ *   does NOT fail silently: `ComponentNavView` renders a named diagnostic
+ *   ("Component not registered … Ensure the plugin that provides this surface
+ *   is installed and has called `registerAppComponent()`"), and the registry
+ *   exists precisely so plugin-provided surfaces may legitimately be absent.
+ *   Flagging it would break valid plugin nav and prescribe a fix for something
+ *   already reported better at runtime.
+ * - **`url`** — external by definition; nothing to resolve against.
+ */
+
+import type { ReferenceIntegrityFinding } from './reference-integrity-suite.js';
+
+export type NavTargetRefSeverity = 'error' | 'warning';
+export type NavTargetRefFinding = ReferenceIntegrityFinding;
+
+/** Emitted when a nav item targets a page/report/dashboard the stack cannot resolve. */
+export const NAV_TARGET_UNRESOLVED = 'nav-target-unresolved';
+
+type AnyRec = Record<string, unknown>;
+
+const isRec = (v: unknown): v is AnyRec => !!v && typeof v === 'object' && !Array.isArray(v);
+
+function asArray(v: unknown): AnyRec[] {
+  if (Array.isArray(v)) return v.filter(isRec);
+  if (isRec(v)) return Object.entries(v).map(([name, def]) => (isRec(def) ? { name, ...def } : { name }));
+  return [];
+}
+
+function strName(v: unknown): string | undefined {
+  return typeof v === 'string' && v.length > 0 ? v : undefined;
+}
+
+/**
+ * An interpolated target resolves at render time — the same conservative
+ * exemption `validate-object-references` and `validate-dashboard-action-refs`
+ * use to keep false positives near zero (ADR-0072 D1).
+ */
+const isInterpolated = (s: string): boolean => s.includes('${') || s.includes('{');
+
+/** nav `type` → [target property, stack collection, human noun]. */
+const NAV_TARGETS: ReadonlyArray<readonly [string, string, string, string]> = [
+  ['page', 'pageName', 'pages', 'page'],
+  ['report', 'reportName', 'reports', 'report'],
+  ['dashboard', 'dashboardName', 'dashboards', 'dashboard'],
+];
+
+function namesOf(collection: unknown): Set<string> {
+  const out = new Set<string>();
+  for (const entry of asArray(collection)) {
+    const n = strName(entry.name);
+    if (n) out.add(n);
+  }
+  return out;
+}
+
+export function validateNavTargetRefs(stack: unknown): NavTargetRefFinding[] {
+  const findings: NavTargetRefFinding[] = [];
+  if (!isRec(stack)) return findings;
+
+  const apps = asArray(stack.apps);
+  if (apps.length === 0) return findings;
+
+  const declared = new Map<string, Set<string>>();
+  for (const [, , collection] of NAV_TARGETS) {
+    declared.set(collection, namesOf((stack as AnyRec)[collection]));
+  }
+
+  for (const [ai, app] of apps.entries()) {
+    const appName = strName(app.name) ?? `#${ai}`;
+
+    const walk = (items: unknown, basePath: string): void => {
+      if (!Array.isArray(items)) return;
+      for (const [ni, raw] of items.entries()) {
+        if (!isRec(raw)) continue;
+        const nav = raw;
+        const navPath = `${basePath}[${ni}]`;
+
+        for (const [type, prop, collection, noun] of NAV_TARGETS) {
+          if (nav.type !== type) continue;
+          const target = strName(nav[prop]);
+          if (!target || isInterpolated(target)) continue;
+          const known = declared.get(collection)!;
+          if (known.has(target)) continue;
+
+          const emptyCollection = known.size === 0;
+          findings.push({
+            severity: 'warning',
+            rule: NAV_TARGET_UNRESOLVED,
+            where: `app "${appName}" · nav "${strName(nav.id) ?? strName(nav.label) ?? `#${ni}`}"`,
+            path: `${navPath}.${prop}`,
+            message:
+              `Navigation targets ${noun} '${target}', which this stack does not declare in `
+              + `\`${collection}\`. `
+              + (emptyCollection
+                ? `The stack declares NO ${collection} at all, so \`defineStack\`'s own `
+                  + `cross-reference check skipped this entry entirely (it is gated on `
+                  + `\`${collection === 'pages' ? 'pageNames' : collection === 'reports' ? 'reportNames' : 'dashboardNames'}.size > 0\`) — `
+                  + `nothing else will report it. `
+                : '')
+              + `The entry renders in the sidebar and resolves to nothing when clicked. If another `
+              + `package provides this ${noun}, this is expected and advisory only.`,
+            hint:
+              `Declare the ${noun} in \`${collection}\`, correct the name, or remove the nav entry `
+              + `if the ${noun} is gone.`,
+          });
+        }
+
+        // Recurse: an `object` nav item carries `children` too, not just a
+        // `group` — the same reason `stack.zod.ts` does not gate its recursion
+        // on the item type.
+        if (Array.isArray(nav.children)) walk(nav.children, `${navPath}.children`);
+      }
+    };
+
+    walk(app.navigation, `apps[${ai}].navigation`);
+    // `areas[]` is the other nav container; it was once skipped wholesale in
+    // `stack.zod.ts`, so an areas-based app got no nav validation at all.
+    for (const [ari, area] of asArray(app.areas).entries()) {
+      walk(area.items, `apps[${ai}].areas[${ari}].items`);
+      walk(area.navigation, `apps[${ai}].areas[${ari}].navigation`);
+    }
+  }
+
+  return findings;
+}