test(backend): split RuleTests.cs by aggregate, refresh DDD doc (WP-71)

RuleTests.cs held five aggregates' rules as nested classes in one file,
misaligned with Domain/<Aggregate>/ and with the Acceptance/Builders/
folder convention WP-70 started. Split into Domain/<Aggregate>RuleTests.cs
(pure move — same names, same bodies, same count) plus a new
ApplicationRuleTests.cs (the enum invariant moved out of the
WebApplicationFactory-booting ApplicationTests.cs, since it's a pure
Enum.GetNames check with no business needing a web host) and
OrgTemplateRuleTests.cs (RejectDraft had no direct unit test before,
only endpoint coverage).

libs/shared/docs/layers.mdx still taught the pre-WP-67 shape (six
contexts, no apps/libs split, enforcement via ESLint) — updated to the
real monorepo structure and to dependency-cruiser as the actual
enforcement mechanism. Adds specs for registration.policy.ts's
isStatusConsistent (untested; its backend mirror is) and both apps'
auth/domain/session.ts.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/behandelportal/src/app/auth/domain/session.spec.ts

@@ -0,0 +1,14 @@
+import { describe, it, expect } from 'vitest';
+import { isAuthenticated, Session } from './session';
+
+const session: Session = { bsn: '19012345601', naam: 'Test' };
+
+describe('isAuthenticated', () => {
+  it('narrows a present session to Session', () => {
+    expect(isAuthenticated(session)).toBe(true);
+  });
+
+  it('reports no session as not authenticated', () => {
+    expect(isAuthenticated(null)).toBe(false);
+  });
+});

apps/ssp/src/app/auth/domain/session.spec.ts

@@ -0,0 +1,14 @@
+import { describe, it, expect } from 'vitest';
+import { isAuthenticated, Session } from './session';
+
+const session: Session = { bsn: '19012345601', naam: 'Test' };
+
+describe('isAuthenticated', () => {
+  it('narrows a present session to Session', () => {
+    expect(isAuthenticated(session)).toBe(true);
+  });
+
+  it('reports no session as not authenticated', () => {
+    expect(isAuthenticated(null)).toBe(false);
+  });
+});

apps/ssp/src/app/herregistratie/ui/intake-wizard/intake-wizard.component.spec.ts

@@ -10,6 +10,14 @@ import { IntakeState } from '@herregistratie/domain/intake.machine';
 // wrapping is dropped, the inputs revert to bare white. The buitenland step with
 // buitenlandGewerkt='ja' has two groups (the question + the land/uren follow-up), so it
 // must render ≥2 fieldsets, each holding a form-group.
+//
+// SANCTIONED TestBed exception (CLAUDE.md "Testing": UI is normally exercised via Storybook,
+// not heavy component tests): this pins the *count and nesting* of rendered DOM nodes for a
+// specific machine state (2+ <fieldset> wrappers, each containing a .form-group), which is a
+// structural/visual regression, not an accessibility one — a Storybook a11y (axe) run checks
+// for accessibility violations on whatever markup is rendered, it does not assert that the
+// markup takes this particular shape, so it would not catch the grouping silently collapsing
+// back to bare inputs.
 const buitenlandJa: IntakeState = {
   tag: 'Answering',
   answers: { buitenlandGewerkt: 'ja' },

apps/ssp/src/app/registratie/domain/registration.policy.spec.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect } from 'vitest';
-import { Registration } from './registration';
-import { isHerregistratieEligible, statusColor } from './registration.policy';
+import { Registration, RegistrationStatus } from './registration';
+import { isHerregistratieEligible, isStatusConsistent, statusColor } from './registration.policy';
 
 const reg = (status: Registration['status']): Registration => ({
   bigNummer: '19012345601',
@@ -38,4 +38,26 @@ describe('registration.policy', () => {
     expect(statusColor('Doorgehaald')).toContain('rood');
     expect(statusColor('Geschorst')).toContain('oranje');
   });
+
+  it('a well-formed status is always consistent', () => {
+    expect(
+      isStatusConsistent(reg({ tag: 'Geregistreerd', herregistratieDatum: '2027-01-01' }).status),
+    ).toBe(true);
+    expect(
+      isStatusConsistent(
+        reg({ tag: 'Doorgehaald', doorgehaaldOp: '2024-05-01', reden: 'x' }).status,
+      ),
+    ).toBe(true);
+    expect(
+      isStatusConsistent(reg({ tag: 'Geschorst', geschorstTot: '2026-12-31', reden: 'x' }).status),
+    ).toBe(true);
+  });
+
+  it('a Geregistreerd status without its herregistratieDatum is inconsistent', () => {
+    // The union itself makes this unrepresentable through normal construction (every
+    // Geregistreerd literal must carry a herregistratieDatum) — only reachable here by
+    // bypassing the type system, the way malformed runtime/serialized data could.
+    const malformed = { tag: 'Geregistreerd' } as unknown as RegistrationStatus;
+    expect(isStatusConsistent(malformed)).toBe(false);
+  });
 });

backend/tests/BigRegister.Tests/Domain/ApplicationRuleTests.cs

@@ -0,0 +1,17 @@
+using BigRegister.Domain.Applications;
+
+namespace BigRegister.Tests.Domain;
+
+public class ApplicationRuleTests
+{
+  // WP-63: the published lifecycle (ADR-0002) must name exactly these five tags, in this
+  // order — ToStatusDto's string literals must keep matching Enum.ToString(), and Ingediend/
+  // MeerInfoGevraagd (unreachable until WP-65 adds the behandelaar transition) stay defined.
+  [Fact]
+  public void AanvraagStatusTag_covers_the_published_lifecycle()
+  {
+    Assert.Equal(
+        new[] { "Ingediend", "InBehandeling", "MeerInfoGevraagd", "Goedgekeurd", "Afgewezen" },
+        Enum.GetNames<AanvraagStatusTag>());
+  }
+}

backend/tests/BigRegister.Tests/Domain/BeoordelingRuleTests.cs

@@ -0,0 +1,51 @@
+using BigRegister.Domain.Applications;
+using BigRegister.Domain.Beoordeling;
+using BigRegister.Tests.Builders;
+
+namespace BigRegister.Tests.Domain;
+
+public class BeoordelingRuleTests
+{
+  [Theory]
+  [InlineData(AanvraagStatusTag.Ingediend, true)]
+  [InlineData(AanvraagStatusTag.InBehandeling, true)]
+  [InlineData(AanvraagStatusTag.MeerInfoGevraagd, true)]
+  [InlineData(AanvraagStatusTag.Goedgekeurd, false)]
+  [InlineData(AanvraagStatusTag.Afgewezen, false)]
+  public void Only_open_statuses_are_decidable(AanvraagStatusTag tag, bool expected) =>
+      Assert.Equal(expected, BeoordelingRules.CanDecide(tag));
+
+  // WP-68 (F6): the toelichting rule, moved here from an inline endpoint check.
+  [Theory]
+  [InlineData(Besluit.Goedkeuren, false)]
+  [InlineData(Besluit.Afwijzen, true)]
+  [InlineData(Besluit.MeerInfoOpvragen, true)]
+  public void Only_a_non_approval_requires_a_toelichting(Besluit besluit, bool expected) =>
+      Assert.Equal(expected, BeoordelingRules.RequiresToelichting(besluit));
+
+  // WP-68 (T3): the transition table at the AGGREGATE level, not just against a bare tag —
+  // an Aanvraag whose BesluitStatus already records a terminal decision computes a terminal
+  // StatusAt, and CanDecide refuses a further besluit regardless of which one. Pins the
+  // domain statement "Afgewezen/Goedgekeurd → no further besluit" independent of the
+  // endpoint's own (integration-level) Already_decided_case_rejects_a_further_besluit.
+  // WP-70: built via Given, not a hand-rolled Aanvraag literal — Decided(Besluit.Afwijzen) with
+  // no toelichting simply couldn't compile as a fixture here.
+  [Theory]
+  [InlineData(Besluit.Goedkeuren)]
+  [InlineData(Besluit.Afwijzen)]
+  public void A_terminal_decision_refuses_any_further_besluit(Besluit recorded)
+  {
+    var now = DateTimeOffset.UtcNow;
+    var toelichting = recorded == Besluit.Goedkeuren ? null : "toelichting";
+    var aanvraag = Given.Concept(owner: "test").Submitted().Decided(recorded, toelichting).Build();
+    Assert.False(BeoordelingRules.CanDecide(aanvraag.StatusAt(now).Tag!.Value));
+  }
+
+  [Fact]
+  public void MeerInfoOpvragen_is_not_terminal_a_further_besluit_is_still_legal()
+  {
+    var now = DateTimeOffset.UtcNow;
+    var aanvraag = Given.Concept(owner: "test").Submitted().Decided(Besluit.MeerInfoOpvragen, "toelichting").Build();
+    Assert.True(BeoordelingRules.CanDecide(aanvraag.StatusAt(now).Tag!.Value));
+  }
+}

backend/tests/BigRegister.Tests/Domain/DiplomaRuleTests.cs

@@ -0,0 +1,42 @@
+using BigRegister.Domain.Diplomas;
+
+namespace BigRegister.Tests.Domain;
+
+public class DiplomaRuleTests
+{
+  private static Diploma Diploma(string opleiding, bool engelstalig) =>
+      new("x", "naam", "instelling", 2011, opleiding, engelstalig);
+
+  [Theory]
+  [InlineData("geneeskunde", "Arts")]
+  [InlineData("verpleegkunde", "Verpleegkundige")]
+  [InlineData("onbekend-programma", "Onbekend")]
+  public void Profession_is_derived_from_program(string opleiding, string expected) =>
+      Assert.Equal(expected, DiplomaRules.ProfessionFor(Diploma(opleiding, false)));
+
+  [Fact]
+  public void English_diploma_requires_dutch_proficiency()
+  {
+    var questions = DiplomaRules.QuestionsFor(Diploma("geneeskunde", engelstalig: true));
+    Assert.Single(questions);
+    Assert.Equal("nl-taalvaardigheid", questions[0].Id);
+  }
+
+  [Fact]
+  public void Dutch_diploma_has_no_policy_questions() =>
+      Assert.Empty(DiplomaRules.QuestionsFor(Diploma("geneeskunde", engelstalig: false)));
+
+  [Fact]
+  public void Manual_diploma_gets_maximal_set()
+  {
+    var questions = DiplomaRules.ManualQuestions();
+    Assert.Equal(3, questions.Count);
+    Assert.Equal(new[] { "nl-taalvaardigheid", "diploma-erkend", "toelichting" },
+        questions.Select(q => q.Id));
+  }
+
+  [Fact]
+  public void Manual_professions_match_known_programs() =>
+      Assert.Equal(new[] { "Arts", "Verpleegkundige", "Fysiotherapeut", "Apotheker", "Tandarts" },
+          DiplomaRules.ManualProfessions());
+}

backend/tests/BigRegister.Tests/Domain/DocumentRuleTests.cs

@@ -0,0 +1,58 @@
+using BigRegister.Domain.Documents;
+
+namespace BigRegister.Tests.Domain;
+
+public class DocumentRuleTests
+{
+  [Fact]
+  public void Rejects_unknown_category() =>
+      Assert.NotNull(DocumentRules.RejectUpload(null, "application/pdf", 1));
+
+  [Fact]
+  public void Rejects_disallowed_type()
+  {
+    var c = DocumentRules.Find("registratie", "diploma");
+    Assert.NotNull(DocumentRules.RejectUpload(c, "text/plain", 1));
+  }
+
+  [Fact]
+  public void Rejects_oversized_file()
+  {
+    var c = DocumentRules.Find("registratie", "diploma");
+    Assert.NotNull(DocumentRules.RejectUpload(c, "application/pdf", 11L * 1024 * 1024));
+  }
+
+  [Fact]
+  public void Accepts_valid_file()
+  {
+    var c = DocumentRules.Find("registratie", "diploma");
+    Assert.Null(DocumentRules.RejectUpload(c, "application/pdf", 5L * 1024 * 1024));
+  }
+
+  private static IReadOnlyList<string> Ids(string? herkomst, string? taalvaardigheid) =>
+      DocumentRules.CategoriesFor("registratie", herkomst, taalvaardigheid).Select(c => c.CategoryId).ToList();
+
+  [Fact]
+  public void First_load_has_no_diploma_upload() => // no diploma chosen yet
+      Assert.Equal(new[] { "identiteit" }, Ids(null, null));
+
+  [Fact]
+  public void Manual_diploma_needs_a_diploma_upload() =>
+      Assert.Equal(new[] { "diploma", "identiteit" }, Ids("handmatig", null));
+
+  [Fact]
+  public void Duo_diploma_skips_diploma_upload() =>
+      Assert.DoesNotContain("diploma", Ids("duo", null));
+
+  [Fact]
+  public void Confirmed_dutch_proficiency_requires_taalvaardigheid_proof() =>
+      Assert.Contains("taalvaardigheid", Ids("handmatig", "ja"));
+
+  [Fact]
+  public void Unconfirmed_proficiency_requires_no_taalvaardigheid_proof() =>
+      Assert.DoesNotContain("taalvaardigheid", Ids("handmatig", "nee"));
+
+  [Fact]
+  public void Find_resolves_taalvaardigheid_for_upload_validation() =>
+      Assert.NotNull(DocumentRules.Find("registratie", "taalvaardigheid"));
+}

backend/tests/BigRegister.Tests/Domain/OrgTemplateRuleTests.cs

@@ -0,0 +1,43 @@
+using BigRegister.Api.Contracts;
+using BigRegister.Domain.Letters;
+
+namespace BigRegister.Tests.Domain;
+
+public class OrgTemplateRuleTests
+{
+  private static OrgTemplateDto Draft(
+      string orgName = "BIG-register",
+      string signatureName = "J. Jansen",
+      MarginsDto? margins = null) =>
+      new(
+          SubOrgId: "registers", OrgName: orgName, ReturnAddress: "Postbus 1, Den Haag",
+          LogoDocumentId: null, FooterContact: "info@example.nl", FooterLegal: "KvK 12345678",
+          SignatureName: signatureName, SignatureRole: "Manager", SignatureClosing: "Met vriendelijke groet",
+          Margins: margins ?? new MarginsDto(20, 20, 20, 20));
+
+  [Fact]
+  public void Accepts_a_complete_draft_within_the_margin_bounds() =>
+      Assert.Null(OrgTemplateRules.RejectDraft(Draft()));
+
+  [Fact]
+  public void Rejects_a_missing_organisation_name() =>
+      Assert.NotNull(OrgTemplateRules.RejectDraft(Draft(orgName: "")));
+
+  [Fact]
+  public void Rejects_a_missing_signature_name() =>
+      Assert.NotNull(OrgTemplateRules.RejectDraft(Draft(signatureName: "   ")));
+
+  [Theory]
+  [InlineData(9, 20, 20, 20)]   // top just under the minimum
+  [InlineData(20, 51, 20, 20)]  // right just over the maximum
+  [InlineData(20, 20, 9, 20)]   // bottom under the minimum
+  [InlineData(20, 20, 20, 51)]  // left over the maximum
+  public void Rejects_a_margin_outside_the_allowed_range(int top, int right, int bottom, int left) =>
+      Assert.NotNull(OrgTemplateRules.RejectDraft(Draft(margins: new MarginsDto(top, right, bottom, left))));
+
+  [Theory]
+  [InlineData(10, 10, 10, 10)]  // the minimum, inclusive
+  [InlineData(50, 50, 50, 50)]  // the maximum, inclusive
+  public void Accepts_margins_on_the_boundary(int top, int right, int bottom, int left) =>
+      Assert.Null(OrgTemplateRules.RejectDraft(Draft(margins: new MarginsDto(top, right, bottom, left))));
+}

backend/tests/BigRegister.Tests/Domain/RegistrationRuleTests.cs

@@ -0,0 +1,57 @@
+using BigRegister.Domain.Registrations;
+
+namespace BigRegister.Tests.Domain;
+
+public class HerregistratieRuleTests
+{
+  private static Registration Active(DateOnly deadline) => new(
+      "19012345601", "Test", "Arts",
+      new DateOnly(2012, 9, 1), new DateOnly(1985, 3, 14),
+      new RegistrationStatus(StatusTag.Geregistreerd, HerregistratieDatum: deadline));
+
+  [Fact]
+  public void Eligible_within_window()
+  {
+    var (eligible, reason) = HerregistratieRule.Evaluate(
+        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2026, 6, 26));
+    Assert.True(eligible);
+    Assert.Contains("12 maanden", reason);
+  }
+
+  [Fact]
+  public void Not_eligible_before_window()
+  {
+    var (eligible, _) = HerregistratieRule.Evaluate(
+        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2025, 1, 1));
+    Assert.False(eligible);
+  }
+
+  [Fact]
+  public void Eligible_on_window_boundary()
+  {
+    // window opens exactly 12 months before the deadline
+    var (eligible, _) = HerregistratieRule.Evaluate(
+        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2026, 3, 1));
+    Assert.True(eligible);
+  }
+
+  [Fact]
+  public void Suspended_is_not_eligible()
+  {
+    var reg = Active(new DateOnly(2027, 3, 1)) with
+    {
+      Status = new RegistrationStatus(StatusTag.Geschorst, GeschorstTot: new DateOnly(2027, 1, 1), Reden: "x"),
+    };
+    var (eligible, _) = HerregistratieRule.Evaluate(reg, today: new DateOnly(2026, 6, 26));
+    Assert.False(eligible);
+  }
+
+  [Fact]
+  public void Status_consistency_invariant()
+  {
+    Assert.True(HerregistratieRule.IsStatusConsistent(
+        new RegistrationStatus(StatusTag.Geregistreerd, HerregistratieDatum: new DateOnly(2027, 3, 1))));
+    Assert.False(HerregistratieRule.IsStatusConsistent(
+        new RegistrationStatus(StatusTag.Geregistreerd)));
+  }
+}

backend/tests/BigRegister.Tests/Domain/SubmissionRuleTests.cs

@@ -0,0 +1,30 @@
+using BigRegister.Domain.Submissions;
+
+namespace BigRegister.Tests.Domain;
+
+public class SubmissionRuleTests
+{
+  [Fact]
+  public void Manual_diploma_is_rejected() =>
+      Assert.NotNull(SubmissionRules.RejectRegistratie("handmatig"));
+
+  [Fact]
+  public void Duo_diploma_is_accepted() =>
+      Assert.Null(SubmissionRules.RejectRegistratie("duo"));
+
+  [Fact]
+  public void Zero_hours_is_rejected() =>
+      Assert.NotNull(SubmissionRules.RejectZeroUren(0));
+
+  [Fact]
+  public void Worked_hours_are_accepted() =>
+      Assert.Null(SubmissionRules.RejectZeroUren(40));
+
+  [Theory]
+  [InlineData("0612345678", null)]              // valid mobile
+  [InlineData("070 123 45 67", null)]           // valid landline, formatting stripped
+  [InlineData("nope", "Voer een geldig telefoonnummer in, bijv. 0612345678.")]
+  [InlineData("12345", "Voer een geldig telefoonnummer in, bijv. 0612345678.")]
+  public void Phone_change_is_validated(string telefoon, string? expected) =>
+      Assert.Equal(expected, SubmissionRules.RejectPhoneChange(telefoon));
+}

backend/tests/BigRegister.Tests/RuleTests.cs

@@ -1,230 +0,0 @@
-using BigRegister.Domain.Applications;
-using BigRegister.Domain.Beoordeling;
-using BigRegister.Domain.Diplomas;
-using BigRegister.Domain.Documents;
-using BigRegister.Domain.Registrations;
-using BigRegister.Domain.Submissions;
-using BigRegister.Tests.Builders;
-
-namespace BigRegister.Tests;
-
-public class DocumentRuleTests
-{
-  [Fact]
-  public void Rejects_unknown_category() =>
-      Assert.NotNull(DocumentRules.RejectUpload(null, "application/pdf", 1));
-
-  [Fact]
-  public void Rejects_disallowed_type()
-  {
-    var c = DocumentRules.Find("registratie", "diploma");
-    Assert.NotNull(DocumentRules.RejectUpload(c, "text/plain", 1));
-  }
-
-  [Fact]
-  public void Rejects_oversized_file()
-  {
-    var c = DocumentRules.Find("registratie", "diploma");
-    Assert.NotNull(DocumentRules.RejectUpload(c, "application/pdf", 11L * 1024 * 1024));
-  }
-
-  [Fact]
-  public void Accepts_valid_file()
-  {
-    var c = DocumentRules.Find("registratie", "diploma");
-    Assert.Null(DocumentRules.RejectUpload(c, "application/pdf", 5L * 1024 * 1024));
-  }
-
-  private static IReadOnlyList<string> Ids(string? herkomst, string? taalvaardigheid) =>
-      DocumentRules.CategoriesFor("registratie", herkomst, taalvaardigheid).Select(c => c.CategoryId).ToList();
-
-  [Fact]
-  public void First_load_has_no_diploma_upload() => // no diploma chosen yet
-      Assert.Equal(new[] { "identiteit" }, Ids(null, null));
-
-  [Fact]
-  public void Manual_diploma_needs_a_diploma_upload() =>
-      Assert.Equal(new[] { "diploma", "identiteit" }, Ids("handmatig", null));
-
-  [Fact]
-  public void Duo_diploma_skips_diploma_upload() =>
-      Assert.DoesNotContain("diploma", Ids("duo", null));
-
-  [Fact]
-  public void Confirmed_dutch_proficiency_requires_taalvaardigheid_proof() =>
-      Assert.Contains("taalvaardigheid", Ids("handmatig", "ja"));
-
-  [Fact]
-  public void Unconfirmed_proficiency_requires_no_taalvaardigheid_proof() =>
-      Assert.DoesNotContain("taalvaardigheid", Ids("handmatig", "nee"));
-
-  [Fact]
-  public void Find_resolves_taalvaardigheid_for_upload_validation() =>
-      Assert.NotNull(DocumentRules.Find("registratie", "taalvaardigheid"));
-}
-
-public class HerregistratieRuleTests
-{
-  private static Registration Active(DateOnly deadline) => new(
-      "19012345601", "Test", "Arts",
-      new DateOnly(2012, 9, 1), new DateOnly(1985, 3, 14),
-      new RegistrationStatus(StatusTag.Geregistreerd, HerregistratieDatum: deadline));
-
-  [Fact]
-  public void Eligible_within_window()
-  {
-    var (eligible, reason) = HerregistratieRule.Evaluate(
-        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2026, 6, 26));
-    Assert.True(eligible);
-    Assert.Contains("12 maanden", reason);
-  }
-
-  [Fact]
-  public void Not_eligible_before_window()
-  {
-    var (eligible, _) = HerregistratieRule.Evaluate(
-        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2025, 1, 1));
-    Assert.False(eligible);
-  }
-
-  [Fact]
-  public void Eligible_on_window_boundary()
-  {
-    // window opens exactly 12 months before the deadline
-    var (eligible, _) = HerregistratieRule.Evaluate(
-        Active(new DateOnly(2027, 3, 1)), today: new DateOnly(2026, 3, 1));
-    Assert.True(eligible);
-  }
-
-  [Fact]
-  public void Suspended_is_not_eligible()
-  {
-    var reg = Active(new DateOnly(2027, 3, 1)) with
-    {
-      Status = new RegistrationStatus(StatusTag.Geschorst, GeschorstTot: new DateOnly(2027, 1, 1), Reden: "x"),
-    };
-    var (eligible, _) = HerregistratieRule.Evaluate(reg, today: new DateOnly(2026, 6, 26));
-    Assert.False(eligible);
-  }
-
-  [Fact]
-  public void Status_consistency_invariant()
-  {
-    Assert.True(HerregistratieRule.IsStatusConsistent(
-        new RegistrationStatus(StatusTag.Geregistreerd, HerregistratieDatum: new DateOnly(2027, 3, 1))));
-    Assert.False(HerregistratieRule.IsStatusConsistent(
-        new RegistrationStatus(StatusTag.Geregistreerd)));
-  }
-}
-
-public class DiplomaRuleTests
-{
-  private static Diploma Diploma(string opleiding, bool engelstalig) =>
-      new("x", "naam", "instelling", 2011, opleiding, engelstalig);
-
-  [Theory]
-  [InlineData("geneeskunde", "Arts")]
-  [InlineData("verpleegkunde", "Verpleegkundige")]
-  [InlineData("onbekend-programma", "Onbekend")]
-  public void Profession_is_derived_from_program(string opleiding, string expected) =>
-      Assert.Equal(expected, DiplomaRules.ProfessionFor(Diploma(opleiding, false)));
-
-  [Fact]
-  public void English_diploma_requires_dutch_proficiency()
-  {
-    var questions = DiplomaRules.QuestionsFor(Diploma("geneeskunde", engelstalig: true));
-    Assert.Single(questions);
-    Assert.Equal("nl-taalvaardigheid", questions[0].Id);
-  }
-
-  [Fact]
-  public void Dutch_diploma_has_no_policy_questions() =>
-      Assert.Empty(DiplomaRules.QuestionsFor(Diploma("geneeskunde", engelstalig: false)));
-
-  [Fact]
-  public void Manual_diploma_gets_maximal_set()
-  {
-    var questions = DiplomaRules.ManualQuestions();
-    Assert.Equal(3, questions.Count);
-    Assert.Equal(new[] { "nl-taalvaardigheid", "diploma-erkend", "toelichting" },
-        questions.Select(q => q.Id));
-  }
-
-  [Fact]
-  public void Manual_professions_match_known_programs() =>
-      Assert.Equal(new[] { "Arts", "Verpleegkundige", "Fysiotherapeut", "Apotheker", "Tandarts" },
-          DiplomaRules.ManualProfessions());
-}
-
-public class SubmissionRuleTests
-{
-  [Fact]
-  public void Manual_diploma_is_rejected() =>
-      Assert.NotNull(SubmissionRules.RejectRegistratie("handmatig"));
-
-  [Fact]
-  public void Duo_diploma_is_accepted() =>
-      Assert.Null(SubmissionRules.RejectRegistratie("duo"));
-
-  [Fact]
-  public void Zero_hours_is_rejected() =>
-      Assert.NotNull(SubmissionRules.RejectZeroUren(0));
-
-  [Fact]
-  public void Worked_hours_are_accepted() =>
-      Assert.Null(SubmissionRules.RejectZeroUren(40));
-
-  [Theory]
-  [InlineData("0612345678", null)]              // valid mobile
-  [InlineData("070 123 45 67", null)]           // valid landline, formatting stripped
-  [InlineData("nope", "Voer een geldig telefoonnummer in, bijv. 0612345678.")]
-  [InlineData("12345", "Voer een geldig telefoonnummer in, bijv. 0612345678.")]
-  public void Phone_change_is_validated(string telefoon, string? expected) =>
-      Assert.Equal(expected, SubmissionRules.RejectPhoneChange(telefoon));
-}
-
-public class BeoordelingRuleTests
-{
-  [Theory]
-  [InlineData(AanvraagStatusTag.Ingediend, true)]
-  [InlineData(AanvraagStatusTag.InBehandeling, true)]
-  [InlineData(AanvraagStatusTag.MeerInfoGevraagd, true)]
-  [InlineData(AanvraagStatusTag.Goedgekeurd, false)]
-  [InlineData(AanvraagStatusTag.Afgewezen, false)]
-  public void Only_open_statuses_are_decidable(AanvraagStatusTag tag, bool expected) =>
-      Assert.Equal(expected, BeoordelingRules.CanDecide(tag));
-
-  // WP-68 (F6): the toelichting rule, moved here from an inline endpoint check.
-  [Theory]
-  [InlineData(Besluit.Goedkeuren, false)]
-  [InlineData(Besluit.Afwijzen, true)]
-  [InlineData(Besluit.MeerInfoOpvragen, true)]
-  public void Only_a_non_approval_requires_a_toelichting(Besluit besluit, bool expected) =>
-      Assert.Equal(expected, BeoordelingRules.RequiresToelichting(besluit));
-
-  // WP-68 (T3): the transition table at the AGGREGATE level, not just against a bare tag —
-  // an Aanvraag whose BesluitStatus already records a terminal decision computes a terminal
-  // StatusAt, and CanDecide refuses a further besluit regardless of which one. Pins the
-  // domain statement "Afgewezen/Goedgekeurd → no further besluit" independent of the
-  // endpoint's own (integration-level) Already_decided_case_rejects_a_further_besluit.
-  // WP-70: built via Given, not a hand-rolled Aanvraag literal — Decided(Besluit.Afwijzen) with
-  // no toelichting simply couldn't compile as a fixture here.
-  [Theory]
-  [InlineData(Besluit.Goedkeuren)]
-  [InlineData(Besluit.Afwijzen)]
-  public void A_terminal_decision_refuses_any_further_besluit(Besluit recorded)
-  {
-    var now = DateTimeOffset.UtcNow;
-    var toelichting = recorded == Besluit.Goedkeuren ? null : "toelichting";
-    var aanvraag = Given.Concept(owner: "test").Submitted().Decided(recorded, toelichting).Build();
-    Assert.False(BeoordelingRules.CanDecide(aanvraag.StatusAt(now).Tag!.Value));
-  }
-
-  [Fact]
-  public void MeerInfoOpvragen_is_not_terminal_a_further_besluit_is_still_legal()
-  {
-    var now = DateTimeOffset.UtcNow;
-    var aanvraag = Given.Concept(owner: "test").Submitted().Decided(Besluit.MeerInfoOpvragen, "toelichting").Build();
-    Assert.True(BeoordelingRules.CanDecide(aanvraag.StatusAt(now).Tag!.Value));
-  }
-}

libs/shared/docs/layers.mdx

@@ -8,30 +8,47 @@ This project is **domain-driven**: the code is organised first by **bounded cont
 (a business capability with its own language) and then by **layer** inside each context,
 with dependencies pointing inward. The Storybook sidebar is laid out to **be** that
 architecture, not just document it: **Foundations** (this curriculum) → **Design System**
-(reusable, domain-free) → **Domein** (the six DDD contexts). If a component lives under a context's `ui/`, it's in Domein; everything else
-in `shared/ui`/`shared/layout` is Design System. See [Atomic design](?path=/docs/foundations-atomic-design--docs)
+(reusable, domain-free) → **Domein** (the app-local DDD contexts). If a component lives
+under a context's `ui/`, it's in Domein; everything else in `libs/shared/ui`/`layout`
+(or `libs/beheer/ui`) is Design System. See [Atomic design](?path=/docs/foundations-atomic-design--docs)
 for the Atoms → Molecules → Organisms → Templates ladder inside Design System.
 
-## Six contexts, one direction
+## Two apps, two shared libraries
+
+This is a **monorepo**: two Angular projects share one backend and one shared library.
 
 ```
-src/app/<context>/<layer>/
+apps/<app>/src/app/<context>/<layer>/   — app-local bounded context
+libs/<lib>/src/<layer>/                 — cross-app library
 ```
 
-Contexts: `shared` (the base layer — depends on nothing), `auth`, `registratie`,
-`herregistratie`, `brief` (letter-composition teaching slice), `showcase` (teaching page,
-sanctioned to read every context — nothing imports it).
+- `apps/ssp` — the Zorgverlener self-service portal. Contexts: `auth`, `registratie`,
+  `herregistratie`, `brief` (letter-composition teaching slice), `showcase` (teaching
+  page, sanctioned to read every context in its own app — nothing imports it).
+- `apps/behandelportal` — the Behandelaar backoffice (ADR-0002). Contexts: `auth`,
+  `behandeling`.
+- `libs/shared` — the design system + kernel + generated API client. No business logic.
+  The base layer: depends on nothing app- or context-specific.
+- `libs/beheer` — the admin/stamdata context, used identically by both apps.
 
-**Dependencies only point inward and in one declared direction between contexts:**
+`auth` is deliberately **not** shared even though today it's near-identical in both
+apps — ADR-0002 models Zorgverlener/Medewerker as different `Principal` variants with
+different login flows, so the two copies are expected to diverge.
+
+**Dependencies only point inward, in one declared direction between contexts:**
 
 ```
-herregistratie → registratie → shared
-auth           → shared
-brief          → shared
+herregistratie → registratie → libs/shared|beheer     (ssp)
+auth           → libs/shared|beheer                    (ssp)
+brief          → libs/shared|beheer                    (ssp)
+behandeling    → libs/shared|beheer                    (behandelportal)
+auth           → libs/shared|beheer                    (behandelportal)
 ```
 
-Never the other way — `registratie` may not import `herregistratie`, and no context but
-`shared` is imported by everyone.
+Never the other way — `registratie` may not import `herregistratie`, no context but
+`libs/shared`/`libs/beheer` is imported by everyone, an app may not import the other
+app's source, and `libs/shared` may not depend on `libs/beheer` (shared stays the base,
+beheer a peer leaf).
 
 ## Five layers, one direction
 
@@ -48,13 +65,20 @@ reach data through an application store or command.
 
 ## This is enforced, not just written down
 
-`eslint.config.mjs` fails the build on every rule above:
+`npm run dep:check` (dependency-cruiser) fails the build on every rule above. One shared
+rule _factory_ (`.dependency-cruiser.base.js`) is instantiated once per app — each app is
+cruised separately against its own `tsconfig.json`, since `apps/ssp` and
+`apps/behandelportal` each declare `@auth/*` pointing at a different physical directory
+and a single merged tsconfig can't resolve both at once:
 
-- `domain/` importing `@angular/*` at all (any context).
-- `shared/` importing a feature context (`@auth/*`, `@registratie/*`, `@herregistratie/*`,
-  `@brief/*`) — the base layer depends on nothing.
+- `domain/` importing `@angular/*` at all (any context, either app).
+- `libs/shared` importing an app feature context, or `libs/beheer` — the base layer
+  depends on nothing.
+- `libs/beheer` importing an app feature context.
+- an app importing the other app's source directly.
 - `registratie/` importing `@herregistratie/*`/`@brief/*`, `auth/`/`brief/` importing a
-  sibling context — the cross-context direction above.
+  sibling context — the cross-context direction above, one `.dependency-cruiser.<app>.js`
+  per app.
 - `contracts/**` importing **anything** — not Angular, not an alias, not even a relative
   path (ADR-0001's wire seam has to stay a pure DTO shape).
 - `ui/**`/`layout/**` importing `*/infrastructure/*` — the anti-corruption boundary
@@ -63,10 +87,15 @@ reach data through an application store or command.
 - The generated `ApiClient` imported as a value outside an `infrastructure/` adapter
   (type-only DTO imports are exempt — they grant no network access).
 
-Two components get a documented exemption from the "nothing reaches across" rule:
-`shared/ui/debug-state` (reads every root store, for the dev-only state panel) and
-`showcase/` (reads every context, for side-by-side teaching pages). Both exemptions live
-next to the rule they break, in `eslint.config.mjs`, so they can't rot silently.
+`showcase` gets a documented exemption from the "nothing reaches across" rule
+(`showcase: null` in `.dependency-cruiser.ssp.js`) — it reads every context in its own
+app, for side-by-side teaching pages. The dev-only state panel (`apps/ssp/src/app/shell/debug-state`)
+reads every root store too, but needs no such exemption: it lives outside any enumerated
+context, so the per-context scoping rule never applies to it in the first place.
+
+`npm run lint` (`eslint.config.mjs`) is a separate gate — mainly the `any`-free rule —
+and no longer carries the import-boundary rules above (moved to dependency-cruiser,
+WP-38/WP-67, so they don't have to be hand-copied per context).
 
 ## The English/Dutch seam