ci: исполнять TS/Python parity на чистом runner (#548)

Issue: #548
User-Visible: no

.github/workflows/validate.yml

@@ -216,6 +216,7 @@ jobs:
       actions: read
     outputs:
       frontend: ${{ steps.classify.outputs.frontend }}
+      geometry_parity: ${{ steps.classify.outputs.geometry_parity }}
       backend: ${{ steps.classify.outputs.backend }}
       integration: ${{ steps.classify.outputs.integration }}
       perf_iso: ${{ steps.classify.outputs.perf_iso }} # #473 §5
@@ -370,11 +371,13 @@ jobs:
       smoke: ${{ steps.probe.outputs.smoke }}
       golden: ${{ steps.probe.outputs.golden }}
       performance_smoke: ${{ steps.probe.outputs.performance_smoke }}
+      geometry_parity: ${{ steps.probe.outputs.geometry_parity }}
       backend: ${{ steps.probe.outputs.backend }}
       smoke_key: ${{ steps.keys.outputs.smoke }}
       golden_key: ${{ steps.keys.outputs.golden }}
       performance_smoke_key: ${{ steps.keys.outputs.performance_smoke }}
       performance_smoke_set: ${{ steps.keys.outputs.performance_smoke_set }}
+      geometry_parity_key: ${{ steps.keys.outputs.geometry_parity }}
       backend_key: ${{ steps.keys.outputs.backend }}
       smoke_source_run: ${{ steps.p_smoke.outputs.source_run }}
       smoke_source_attempt: ${{ steps.p_smoke.outputs.source_attempt }}
@@ -385,6 +388,9 @@ jobs:
       performance_smoke_source_run: ${{ steps.p_perf.outputs.source_run }}
       performance_smoke_source_attempt: ${{ steps.p_perf.outputs.source_attempt }}
       performance_smoke_source_sha: ${{ steps.p_perf.outputs.source_sha }}
+      geometry_parity_source_run: ${{ steps.p_geometry_parity.outputs.source_run }}
+      geometry_parity_source_attempt: ${{ steps.p_geometry_parity.outputs.source_attempt }}
+      geometry_parity_source_sha: ${{ steps.p_geometry_parity.outputs.source_sha }}
       backend_source_run: ${{ steps.p_backend.outputs.source_run }}
       backend_source_attempt: ${{ steps.p_backend.outputs.source_attempt }}
       backend_source_sha: ${{ steps.p_backend.outputs.source_sha }}
@@ -398,7 +404,7 @@ jobs:
           PERF_ISO: ${{ needs.changes.outputs.perf_iso }}
           PERF_INTERACTION: ${{ needs.changes.outputs.perf_interaction }}
         run: |
-          for job in smoke golden performance_smoke backend; do
+          for job in smoke golden performance_smoke geometry_parity backend; do
             key=$(node scripts/gate-reuse.mjs --job="$job")
             echo "$job=$key" >> "$GITHUB_OUTPUT"
             echo "$job: $key"
@@ -451,6 +457,19 @@ jobs:
       - name: Очистить маркер performance_smoke перед следующим lookup
         if: always()
         run: rm -f .reuse-marker
+      - name: Маркер geometry_parity
+        id: m_geometry_parity
+        uses: actions/cache/restore@v6
+        with:
+          path: .reuse-marker
+          key: reuse-geometry_parity-${{ steps.keys.outputs.geometry_parity }}
+      - name: Доказательство источника geometry_parity
+        id: p_geometry_parity
+        if: steps.m_geometry_parity.outputs.cache-hit == 'true'
+        run: node scripts/ci-proof.mjs --marker=.reuse-marker
+      - name: Очистить маркер geometry_parity перед следующим lookup
+        if: always()
+        run: rm -f .reuse-marker
       - name: Маркер backend
         id: m_backend
         uses: actions/cache/restore@v6
@@ -470,6 +489,7 @@ jobs:
           SMOKE: ${{ steps.m_smoke.outputs.cache-hit }}
           GOLDEN: ${{ steps.m_golden.outputs.cache-hit }}
           PERF: ${{ steps.m_perf.outputs.cache-hit }}
+          GEOMETRY_PARITY: ${{ steps.m_geometry_parity.outputs.cache-hit }}
           BACKEND: ${{ steps.m_backend.outputs.cache-hit }}
         run: |
           # Пропуск обязан быть громким: молчаливый skip — тот самый тихий
@@ -488,6 +508,7 @@ jobs:
           waive smoke "$SMOKE"
           waive golden "$GOLDEN"
           waive performance_smoke "$PERF"
+          waive geometry_parity "$GEOMETRY_PARITY"
           waive backend "$BACKEND"
 
   hacs:
@@ -1048,6 +1069,40 @@ jobs:
           path: .reuse-marker
           key: reuse-performance_smoke-${{ needs.reuse.outputs.performance_smoke_key }}-${{ needs.reuse.outputs.performance_smoke_set }}
 
+  geometry_parity:
+    name: "Геометрия: TS/Python parity исполнена"
+    needs: [changes, reuse]
+    if: needs.changes.outputs.geometry_parity == 'true' && needs.reuse.outputs.geometry_parity != 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-node@v7
+        with:
+          node-version-file: .nvmrc
+          cache: npm
+      - uses: actions/setup-python@v7
+        with:
+          python-version-file: .python-version
+      - run: npm ci
+      - name: Компилировать узкое TS-зеркало П1–П4
+        run: |
+          npx --no-install tsc -p tsconfig.junction-parity.json
+          node scripts/fix-test-build.mjs
+      - name: Сравнить настоящие TS/Python validators (fail closed)
+        run: python tests_backend/junction_parity.py --build-dir=test-build/junction-parity
+      - name: Записать маркер успеха
+        run: |
+          printf '%s\n' "geometry_parity прогнана успешно" \
+            "SHA: ${{ github.sha }}" \
+            "прогон: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" \
+            "попытка: ${{ github.run_attempt }}" \
+            > .reuse-marker
+      - uses: actions/cache/save@v6
+        continue-on-error: true
+        with:
+          path: .reuse-marker
+          key: reuse-geometry_parity-${{ needs.reuse.outputs.geometry_parity_key }}
+
   backend:
     name: "Бэкенд: pytest в Home Assistant"
     needs: [changes, reuse]
@@ -1137,7 +1192,7 @@ jobs:
   proof:
     name: "Доказательство выполненных проверок"
     if: always()
-    needs: [preflight, changes, reuse, hacs, hassfest, changed_mutants, frontend, smoke, smoke_done, golden, performance_smoke, backend]
+    needs: [preflight, changes, reuse, hacs, hassfest, changed_mutants, frontend, smoke, smoke_done, golden, performance_smoke, geometry_parity, backend]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7

AGENTS.md

@@ -390,7 +390,8 @@ push (#479).** `smoke`, `golden` and `performance_smoke` in Validate are gated
 on the `heavy` output: true for a head commit carrying a `Release:` trailer, for
 `workflow_dispatch full=true` (which `nightly.yml` issues on `dev` every night)
 and for pull requests. A plain push to `dev` runs preflight, frontend (types,
-units, build, bundle sync, no-new-any), backend, hacs and hassfest. Screenshot
+units, build, bundle sync, no-new-any), the narrow TS/Python geometry parity
+guard when its inputs changed, backend, hacs and hassfest. Screenshot
 freshness in `check-docs` is likewise a warning on a plain push and an error on
 the candidate; `publish-prerelease.yml` and `release.yml` refuse a candidate
 without the `Release:` trailer, so a green Validate without the heavy jobs can
@@ -478,7 +479,8 @@ assertions go red and part stay green, which reads as a logic defect.
 success` run for the candidate's SHA, not "the last green one"; a new push cancels
 an unfinished Validate for the same branch. Gate jobs, matching the actual
 `validate.yml` (#191): `docs`, `provenance`, `process-gate`, `hacs`, `hassfest`,
-`frontend`, `smoke`, `golden`, `performance_smoke`, `backend`. The `changes` job
+`frontend`, `smoke`, `golden`, `performance_smoke`, `geometry_parity`, `backend`.
+The `changes` job
 is a service path-filter, not a gate. `docs` is a real blocker: it checks the
 screenshots `sourceFingerprint` against current `src/**`, which is exactly what
 went red after the #113 merge. A stable release additionally waits for Full

PROCESS.md

@@ -633,6 +633,9 @@ npm run golden:verify                 # если менялся визуал
 node scripts/check-docs.mjs           # если менялся src/**
 node scripts/model-invariants.mjs --config <экспорт>   # если правилась геометрия или ссылки
 python -m pytest tests_backend -q     # py3.14 как в CI (npm run toolchain:check), если менялся бэкенд
+npx tsc -p tsconfig.junction-parity.json && node scripts/fix-test-build.mjs \
+  && python tests_backend/junction_parity.py --build-dir=test-build/junction-parity
+                                      # если менялось одно из зеркал junction limits
 ```
 
 **Новый код не добавляет `any`** (#342). В `src/**` уже 1034 вхождения явного

docs/ARCHITECTURE.md

@@ -2034,6 +2034,13 @@ not the feeling that "editor text should be lazy".
 - The backend CI job measures branch coverage (pure + HA harness combined),
   fails below `scripts/backend-coverage-baseline.txt` and refuses to run when
   the HA harness would silently skip.
+- The junction-limit mirror has a separate clean-runner `geometry_parity` job
+  (#548). It compiles only the transitive TypeScript graph rooted at
+  `src/junction-limits.ts`, loads the production Python module without Home
+  Assistant and compares both over `test/fixtures/junction-limits-parity.json`.
+  The job fails closed on missing build/runtime prerequisites, announces the
+  number of executed scenarios, and reuses a result only when both mirrors,
+  fixture, toolchain pins and harness inputs are byte-identical.
 - `const.ERROR_CODES` / `ERROR_CODE_FAMILIES` are THE stable error contract:
   the scanner test proves every emitted code (send_error literals, exception
   class attrs, literal and variable-passed MarkerControlError codes, f-string

docs/DEVELOPMENT.md

@@ -130,6 +130,11 @@ git config core.untrackedCache true
   `$env:PYTEST_DISABLE_PLUGIN_AUTOLOAD='1'`.
 - Full backend (including `test_ha_*.py`): `python -m pytest tests_backend/ -q`
   in CI or WSL/Linux only.
+- Junction-limit TS/Python parity (clean, no Home Assistant):
+  `npx tsc -p tsconfig.junction-parity.json && node scripts/fix-test-build.mjs &&
+  python tests_backend/junction_parity.py --build-dir=test-build/junction-parity`.
+  Its dedicated reusable Validate job owns this proof; missing compiled modules
+  fail setup instead of turning into a pytest skip.
 - IMPORTANT (audit lesson): the rollup typescript plugin reports a syntax error as a WARNING and still
   builds the bundle — a truncated file can "pass". That is why the build starts with `tsc --noEmit`,
   which fails on such errors. Always build with `npm run build`, never bare `rollup -c`.

scripts/check-inputs.mjs

@@ -324,6 +324,17 @@ export const CHECKS = {
     roots: [...BUILD_INPUTS, 'demo/performance/**', ...BROWSER_PROTOCOL, ...REUSE_PROTOCOL, ...WORKFLOW],
     reuse: true,
   },
+  geometry_parity: {
+    // #548: узкий clean-runner guard реальных TS/Python зеркал П1–П4.
+    // Полный frontend artifact и HA harness ему не нужны; каждый фактический
+    // вход перечислен здесь и участвует одновременно в selection и reuse key.
+    entries: ['tests_backend/junction_parity.py', 'src/junction-limits.ts',
+      'custom_components/houseplan/junction_limits.py', 'scripts/fix-test-build.mjs'],
+    roots: ['tests_backend/pure_imports.py', 'custom_components/houseplan/wall_segment_model.py',
+      'test/fixtures/junction-limits-parity.json', 'tsconfig.junction-parity.json', 'tsconfig.json',
+      'package.json', 'package-lock.json', '.nvmrc', '.python-version', ...REUSE_PROTOCOL, ...WORKFLOW],
+    reuse: true,
+  },
   backend: {
     // pytest tests_backend, unittest scripts/support-relay/tests, ruff/mypy, порог покрытия
     entries: ['tests_backend/**/*.py', 'scripts/support-relay/tests/**/*.py', 'scripts/dump-config-schema.py'],

scripts/ci-proof.mjs

@@ -36,6 +36,7 @@ const JOB_RULES = Object.freeze({
   ],
   golden: [{ exact: 'Golden-кадры против принятых эталонов', count: 1 }],
   performance_smoke: [{ exact: 'Перф-смок: бюджет времени кадра', count: 1 }],
+  geometry_parity: [{ exact: 'Геометрия: TS/Python parity исполнена', count: 1 }],
   backend: [{ exact: 'Бэкенд: pytest в Home Assistant', count: 1 }],
 });
 
@@ -66,6 +67,7 @@ export function requiredCheckIds({ request = {}, selection = {} } = {}) {
   if (asBool(selection.integration)) ids.push('integration');
   if (asBool(request.mutants)) ids.push('mutants');
   if (asBool(request.full)) ids.push('smoke', 'golden', 'performance_smoke');
+  if (asBool(selection.geometry_parity)) ids.push('geometry_parity');
   if (asBool(selection.backend)) ids.push('backend');
   return ids;
 }
@@ -90,6 +92,7 @@ export function buildCiProof({
   };
   const selection = {
     frontend: asBool(changes.frontend),
+    geometry_parity: asBool(changes.geometry_parity),
     backend: asBool(changes.backend),
     integration: asBool(changes.integration),
   };
@@ -124,6 +127,7 @@ export function buildCiProof({
     executedOrReused('golden');
     executedOrReused('performance_smoke');
   }
+  if (selection.geometry_parity) executedOrReused('geometry_parity');
   if (selection.backend) executedOrReused('backend');
   const requiredChecks = requiredCheckIds({ request, selection });
   return {

scripts/classify-changes.mjs

@@ -27,6 +27,7 @@ import { checksAffectedBy } from './check-inputs.mjs';
  */
 export const CHECK_OF_OUTPUT = {
   frontend: 'frontend',
+  geometry_parity: 'geometry_parity',
   backend: 'backend',
   integration: 'integration',
   mutants: 'changed_mutants',

scripts/gate-reuse.mjs

@@ -1,6 +1,7 @@
 // Ключ переиспользования результата тяжёлой job (issue #208).
 //
-// Тяжёлые job Validate — smoke, golden, performance_smoke, backend — прогонялись
+// Reusable job Validate — smoke, golden, performance_smoke, geometry_parity,
+// backend — прогонялись
 // на каждый push в dev, включая коммиты в документацию, workflows и процессные
 // скрипты, где бандл и оснастка побайтово те же. Ключ здесь отвечает на один
 // вопрос: «менялось ли хоть что-то, от чего результат этой job зависит».
@@ -17,8 +18,9 @@
 // пишет только успешный прогон с тем же ключом.
 //
 // Свойство, которое стоит знать: релизный кандидат (бета или стабильный релиз)
-// бампает версию — `package.json`/`CARD_VERSION` у браузерных job и
+// бампает версию — `package.json`/`CARD_VERSION` у браузерных job,
-// `custom_components/houseplan/manifest.json` у backend входят в manifest.
+// `package.json` у geometry_parity и `custom_components/houseplan/manifest.json`
+// у backend входят в manifest.
 // Значит ключ кандидата заведомо новый и полный набор гейтов прогоняется всегда.
 // Переиспользование физически не может ослабить релизный гейт.
 

scripts/mutation-gate.mjs

@@ -3202,6 +3202,19 @@ const MUTANT_DEFINITIONS = [
         + '`${point[0].toFixed(6)},${point[1].toFixed(6)}`;',
     }],
   },
+  {
+    id: 'junction-limit-ts-python-parity-drift',
+    guard: 'npx tsc -p tsconfig.junction-parity.json && node scripts/fix-test-build.mjs '
+      + '&& python3 tests_backend/junction_parity.py --build-dir=test-build/junction-parity',
+    because: 'the clean-runner parity job must turn red when either production mirror changes '
+      + 'one shared rule; otherwise a green run can again mean that no cross-runtime comparison '
+      + 'actually happened (#548 AC2)',
+    patches: [{
+      file: 'src/junction-limits.ts',
+      find: 'export const MIN_NODE_DISTANCE_CM = 5;',
+      replace: 'export const MIN_NODE_DISTANCE_CM = 4; // mutant: drift from Python mirror',
+    }],
+  },
   {
     id: 'junction-limit-branch-dropped',
     guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '

test/check-inputs.test.mjs

@@ -122,7 +122,7 @@ test('замыкание останавливается на копиях бан
 });
 
 test('каждая проверка объявлена, у тяжёлых job включён реюз, у остальных нет', () => {
-  assert.deepEqual(REUSE_JOBS, ['smoke', 'golden', 'performance_smoke', 'backend']);
+  assert.deepEqual(REUSE_JOBS, ['smoke', 'golden', 'performance_smoke', 'geometry_parity', 'backend']);
   for (const name of CHECK_NAMES) {
     assert.ok(MANIFEST[name].size > 0, `${name}: пустой manifest`);
     assert.ok(Array.isArray(CHECKS[name].entries) && Array.isArray(CHECKS[name].roots), name);
@@ -132,6 +132,16 @@ test('каждая проверка объявлена, у тяжёлых job в
 
 test('§8.1 представители: каждая категория каждой тяжёлой job — её вход', () => {
   const expect = {
+    geometry_parity: {
+      source: ['src/junction-limits.ts', 'src/space-geometry.ts',
+        'custom_components/houseplan/junction_limits.py', 'custom_components/houseplan/wall_segment_model.py'],
+      tests: ['tests_backend/junction_parity.py'],
+      fixtures: ['test/fixtures/junction-limits-parity.json'],
+      config: ['tsconfig.junction-parity.json', 'tsconfig.json'],
+      toolchain: ['package.json', 'package-lock.json', '.nvmrc', '.python-version',
+        '.github/workflows/validate.yml'],
+      protocol: ['scripts/fix-test-build.mjs', 'scripts/gate-reuse.mjs', 'scripts/check-inputs.mjs'],
+    },
     backend: {
       source: ['custom_components/houseplan/websocket_api.py', 'scripts/support-relay/relay.py',
         'scripts/support-relay/hp_relay/app.py', 'scripts/sh3d-convert/convert.mjs', 'scripts/dump-config-schema.py'],
@@ -216,6 +226,10 @@ test('§8.1 обратная проба (AC6): UI — не вход backend, bac
   for (const job of ['smoke', 'golden', 'performance_smoke']) {
     assert.ok(![...MANIFEST[job]].some((f) => f.startsWith('tests_backend/')), `${job} читает tests_backend`);
   }
+  for (const file of ['src/houseplan-card.ts', 'src/houseplan-editor-runtime.ts',
+    'custom_components/houseplan/websocket_api.py']) {
+    assert.ok(!MANIFEST.geometry_parity.has(file), `geometry_parity зависит от ${file}`);
+  }
 });
 
 test('§5.5 лист покрытия: ни одного неизвестного исполняемого файла, ни одной лишней записи NOT_AN_INPUT', () => {

test/ci-proof.test.mjs

@@ -20,6 +20,7 @@ const names = {
   smokeDone: 'Смоки: все шарды зелёные',
   golden: 'Golden-кадры против принятых эталонов',
   performance: 'Перф-смок: бюджет времени кадра',
+  geometryParity: 'Геометрия: TS/Python parity исполнена',
   backend: 'Бэкенд: pytest в Home Assistant',
 };
 
@@ -33,7 +34,7 @@ const smokeJobs = () => Array.from({ length: 3 }, (_, index) => (
 
 export function proofFixture({
   id = 10, attempt = 2, full = true, mutants = true,
-  frontend = true, backend = true, integration = true, conclusion = 'success',
+  frontend = true, geometryParity = true, backend = true, integration = true, conclusion = 'success',
 } = {}) {
   const needs = {
     preflight: { result: 'success' },
@@ -41,7 +42,8 @@ export function proofFixture({
       result: 'success',
       outputs: {
         heavy: String(full), mutants_requested: String(mutants),
-        frontend: String(frontend), backend: String(backend), integration: String(integration),
+        frontend: String(frontend), geometry_parity: String(geometryParity),
+        backend: String(backend), integration: String(integration),
       },
     },
     reuse: { result: 'success', outputs: {} },
@@ -53,6 +55,7 @@ export function proofFixture({
     smoke_done: { result: full ? 'success' : 'skipped' },
     golden: { result: full ? 'success' : 'skipped' },
     performance_smoke: { result: full ? 'success' : 'skipped' },
+    geometry_parity: { result: geometryParity ? 'success' : 'skipped' },
     backend: { result: backend ? 'success' : 'skipped' },
   };
   const proof = buildCiProof({
@@ -64,6 +67,7 @@ export function proofFixture({
   if (integration) jobs.push(success(names.hacs), success(names.hassfest));
   if (mutants) jobs.push(...mutantJobs());
   if (full) jobs.push(...smokeJobs(), success(names.smokeDone), success(names.golden), success(names.performance));
+  if (geometryParity) jobs.push(success(names.geometryParity));
   if (backend) jobs.push(success(names.backend));
   const run = {
     databaseId: id, attempt, status: 'completed', conclusion,
@@ -80,7 +84,7 @@ test('#541: proof records candidate identity, request and exact required check s
   });
   assert.deepEqual(fixture.proof.requiredChecks, [
     'preflight', 'changes', 'reuse', 'frontend', 'integration', 'mutants',
-    'smoke', 'golden', 'performance_smoke', 'backend',
+    'smoke', 'golden', 'performance_smoke', 'geometry_parity', 'backend',
   ]);
   assert.deepEqual(fixture.proof.requiredChecks, requiredCheckIds(fixture.proof));
 });

test/classify-changes.test.mjs

@@ -68,6 +68,20 @@ test('#492 §1.2: relay, converter, schema и pyproject запускают backe
   }
 });
 
+test('#548: parity выбирается по обоим зеркалам, fixture и toolchain, но не по чужому UI', () => {
+  for (const file of ['src/junction-limits.ts', 'src/space-geometry.ts',
+    'custom_components/houseplan/junction_limits.py',
+    'custom_components/houseplan/wall_segment_model.py',
+    'tests_backend/junction_parity.py', 'test/fixtures/junction-limits-parity.json',
+    'tsconfig.junction-parity.json', 'package-lock.json', '.nvmrc', '.python-version']) {
+    const out = classify([file]);
+    assert.equal(out.geometry_parity, 'true', file);
+    assert.deepEqual(out.unknown, [], file);
+  }
+  assert.equal(classify(['src/houseplan-card.ts']).geometry_parity, 'false');
+  assert.equal(classify(['custom_components/houseplan/websocket_api.py']).geometry_parity, 'false');
+});
+
 test('#492 AC6: правка UI не классифицируется как backend', () => {
   const out = classify(['src/houseplan-card.ts', 'src/houseplan-editor-runtime.ts']);
   assert.equal(out.backend, 'false');

test/fixtures/junction-limits-parity.json

@@ -0,0 +1,115 @@
+{
+  "schema_version": 1,
+  "cell_cm": 5,
+  "cases": [
+    {
+      "name": "angle-14",
+      "segments": [
+        { "ray_degrees": 0, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 14, "length_cm": 100, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "angle-15",
+      "segments": [
+        { "ray_degrees": 0, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 15, "length_cm": 100, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "valence-7",
+      "segments": [
+        { "ray_degrees": 0, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 51, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 102, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 153, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 204, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 255, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 306, "length_cm": 100, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "length-19",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [19, 0] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "length-run",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [10, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [10, 0] }, "b": { "cm": [20, 0] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "length-thickness",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [25, 0] }, "thickness_cm": 30 }
+      ]
+    },
+    {
+      "name": "distance-4",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [0, 4] }, "b": { "cm": [300, 4] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "tee",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [150, 0] }, "b": { "cm": [150, 300] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "angle-15-exact",
+      "segments": [
+        { "ray_degrees": 0, "length_cm": 100, "thickness_cm": 15 },
+        { "ray_degrees": 15, "length_cm": 100, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "length-20-exact",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [20, 0] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "filler-run",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [349, 0] }, "thickness_cm": 30 },
+        { "a": { "cm": [349, 0] }, "b": { "cm": [354, 0] }, "thickness_cm": 30 },
+        { "a": { "cm": [354, 0] }, "b": { "cm": [554, 0] }, "thickness_cm": 20 }
+      ]
+    },
+    {
+      "name": "distance-5-exact",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [0, 5] }, "b": { "cm": [300, 5] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "debris-node",
+      "segments": [
+        { "a": { "units": [-1e-8, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [0, 0] }, "b": { "cm": [0, 300] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "duplicate-wall",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [0, 0] }, "b": { "cm": [300, 0] }, "thickness_cm": 15 }
+      ]
+    },
+    {
+      "name": "collinear-fork",
+      "segments": [
+        { "a": { "cm": [0, 0] }, "b": { "cm": [100, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [100, 0] }, "b": { "cm": [160, 0] }, "thickness_cm": 15 },
+        { "a": { "cm": [100, 0] }, "b": { "cm": [220, 0], "units_offset": [0, 1e-9] }, "thickness_cm": 15 }
+      ]
+    }
+  ]
+}

test/gate-reuse.test.mjs

@@ -27,13 +27,19 @@ const makeTree = () => {
   put('package-lock.json', '{"lockfileVersion":3}\n');
   put('rollup.config.mjs', 'export default {};\n');
   put('tsconfig.json', '{}\n');
+  put('tsconfig.junction-parity.json', '{}\n');
+  put('.nvmrc', '22\n');
+  put('.python-version', '3.14\n');
   put('.github/workflows/validate.yml', 'name: Validate\n');
   put('scripts/source-fingerprint.mjs', '// pinned by the real repo copy\n');
   put('scripts/gate-reuse.mjs', '// reuse protocol\n');
   put('scripts/check-inputs.mjs', '// manifest\n');
+  put('scripts/fix-test-build.mjs', '// esm import fixer\n');
   put('src/card.ts', "export const CARD_VERSION = '1.0.0';\n");
   put('src/plan-optimizer.ts', 'export const PLAN_MODEL_VERSION = 1;\n');
   put('src/logic.ts', 'export const logic = 1;\n');
+  put('src/junction-limits.ts', "import './space-geometry';\nexport const MIN = 5;\n");
+  put('src/space-geometry.ts', 'export const GRID_STEP_N = 1 / 240;\n');
   put('demo/serve.mjs', "import './bundle-freshness.mjs';\n");
   put('demo/bundle-freshness.mjs', 'export const fresh = 1;\n');
   put('demo/srv/demo.html', '<div id="host"></div>\n');
@@ -51,7 +57,12 @@ const makeTree = () => {
   put('demo/performance/compare.mjs', 'export const cmp = 1;\n');
   put('demo/performance/budgets-glow-smoke.json', '{"hardMaxMs":1}\n');
   put('tests_backend/test_pure.py', 'from custom_components.houseplan.store import VERSION\n\ndef test_x():\n    assert True\n');
+  put('tests_backend/junction_parity.py', 'from pure_imports import load_pure\n');
+  put('tests_backend/pure_imports.py', 'def load_pure():\n    pass\n');
   put('tests_backend/requirements.txt', 'pytest\n');
+  put('test/fixtures/junction-limits-parity.json', '{"schema_version":1}\n');
+  put('custom_components/houseplan/junction_limits.py', 'from .wall_segment_model import VERSION\n');
+  put('custom_components/houseplan/wall_segment_model.py', 'VERSION = 1\n');
   put('custom_components/houseplan/store.py', 'VERSION = 1\n');
   put('custom_components/houseplan/manifest.json', '{"domain":"houseplan","version":"1.0.0"}\n');
   put('custom_components/houseplan/frontend/houseplan-card.js', 'built bundle\n');
@@ -71,7 +82,7 @@ const keys = (dir) => Object.fromEntries(JOBS.map((job) => [job, reuseKey(dir, j
 test('every heavy job has non-empty inputs and its own key', () => {
   const { dir } = makeTree();
   try {
-    assert.deepEqual(JOBS, ['smoke', 'golden', 'performance_smoke', 'backend']);
+    assert.deepEqual(JOBS, ['smoke', 'golden', 'performance_smoke', 'geometry_parity', 'backend']);
     const k = keys(dir);
     for (const job of JOBS) assert.ok(harnessFiles(dir, job).length > 0, job);
     assert.equal(new Set(Object.values(k)).size, JOBS.length, 'ключи job обязаны различаться');
@@ -152,6 +163,7 @@ test('harness edits are isolated to their own job (#208)', () => {
     only(['golden'])(() => put('demo/golden/baselines/one.png',
       Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x00, 0x02])));
     only(['performance_smoke'])(() => put('demo/performance/compare.mjs', 'export const cmp = 2;\n'));
+    only(['geometry_parity'])(() => put('test/fixtures/junction-limits-parity.json', '{"schema_version":1,"changed":true}\n'));
     only(['backend'])(() => put('custom_components/houseplan/store.py', 'VERSION = 2\n'));
     // Протокол браузерного харнеса общий для трёх job (#492 §5.1 protocol).
     only(['smoke', 'golden', 'performance_smoke'])(() => put('demo/serve.mjs', "import './bundle-freshness.mjs';\n// harness\n"));

test/validate-workflow.test.mjs

@@ -91,7 +91,7 @@ test('джобы с полной историей качают её без бл
     // job `changes`, поэтому имя job ищется только с начала строки.
     const start = workflow.indexOf(`\n  ${job}:\n`);
     assert.ok(start > 0, `нет job ${job}`);
-    const chunk = workflow.slice(start, start + 1400);
+    const chunk = workflow.slice(start, start + 1800);
     assert.match(chunk, /fetch-depth: 0, filter: 'blob:none'/,
       `${job} обязана качать историю без блобов`);
   }
@@ -193,7 +193,7 @@ test('перф-смок добавляет профиль ровно при св
   assert.ok(!changes.includes("printf 'frontend=true"), 'ручной список выходов в fallback-е запрещён');
 
   const start = workflow.indexOf('\n  performance_smoke:\n');
-  const job = workflow.slice(start, workflow.indexOf('\n  backend:\n', start));
+  const job = workflow.slice(start, workflow.indexOf('\n  geometry_parity:\n', start));
   assert.match(job, /needs: \[changes, frontend, reuse\]/);
   const iso = job.slice(job.indexOf('Изометрический профиль по диффу'), job.indexOf('Профиль взаимодействия по диффу'));
   assert.match(iso, /if: needs\.changes\.outputs\.perf_iso == 'true'/);
@@ -208,6 +208,34 @@ test('перф-смок добавляет профиль ровно при св
   assert.ok(!/\n\s+if:/.test(glow), 'glow-профили гоняются всегда');
 });
 
+test('#548: TS/Python parity — отдельная clean-runner job без тихого skip', () => {
+  const workflow = read('validate.yml');
+  const start = workflow.indexOf('\n  geometry_parity:\n');
+  const job = workflow.slice(start, workflow.indexOf('\n  backend:\n', start));
+  assert.ok(start > 0, 'нет job geometry_parity');
+  assert.match(job, /needs: \[changes, reuse\]/);
+  assert.match(job, /if: needs\.changes\.outputs\.geometry_parity == 'true'/);
+  assert.match(job, /node-version-file: \.nvmrc/);
+  assert.match(job, /python-version-file: \.python-version/);
+  assert.match(job, /npx --no-install tsc -p tsconfig\.junction-parity\.json/);
+  assert.match(job, /python tests_backend\/junction_parity\.py --build-dir=test-build\/junction-parity/);
+  assert.match(job, /reuse-geometry_parity-\$\{\{ needs\.reuse\.outputs\.geometry_parity_key \}\}/);
+  assert.ok(!/pytest\.skip|continue-on-error:[^\n]*\n[^]*junction_parity\.py/.test(job),
+    'паритет не может становиться зелёным через skip/continue-on-error');
+
+  const changes = workflow.slice(workflow.indexOf('\n  changes:\n'), workflow.indexOf('\n  reuse:\n'));
+  assert.match(changes, /geometry_parity: \$\{\{ steps\.classify\.outputs\.geometry_parity \}\}/);
+  const reuse = workflow.slice(workflow.indexOf('\n  reuse:\n'), workflow.indexOf('\n  hacs:\n'));
+  assert.match(reuse, /geometry_parity_key: \$\{\{ steps\.keys\.outputs\.geometry_parity \}\}/);
+  assert.match(reuse, /waive geometry_parity "\$GEOMETRY_PARITY"/);
+
+  const oldPytestHome = readFileSync(
+    new URL('../tests_backend/test_junction_limits.py', import.meta.url), 'utf8',
+  );
+  assert.doesNotMatch(oldPytestHome, /pytest\.skip\([^\n]*test-build/,
+    'старый optional parity pytest не должен возвращаться рядом с обязательной job');
+});
+
 test('ключ reuse перф-смока различает наборы профилей (#473 AC5)', () => {
   const workflow = read('validate.yml');
   const reuse = workflow.slice(workflow.indexOf('\n  reuse:\n'), workflow.indexOf('\n  hacs:\n'));
@@ -468,7 +496,7 @@ test('#541: Validate всегда публикует proof точной попы
   assert.match(proof, /if: always\(\)/, 'proof создаётся и на красном прогоне');
   for (const dependency of [
     'preflight', 'changes', 'reuse', 'hacs', 'hassfest', 'changed_mutants',
-    'frontend', 'smoke', 'smoke_done', 'golden', 'performance_smoke', 'backend',
+    'frontend', 'smoke', 'smoke_done', 'golden', 'performance_smoke', 'geometry_parity', 'backend',
   ]) assert.match(proof, new RegExp(`needs: \\[[^\\n]*\\b${dependency}\\b`), dependency);
   assert.match(proof, /CANDIDATE_SHA: \$\{\{ github\.sha \}\}/);
   assert.match(proof, /CANDIDATE_TREE: \$\{\{ steps\.candidate\.outputs\.tree \}\}/);
@@ -480,12 +508,12 @@ test('#541: Validate всегда публикует proof точной попы
   assert.match(proof, /name: ci-proof-\$\{\{ github\.run_id \}\}-\$\{\{ github\.run_attempt \}\}/);
 
   const reuse = workflow.slice(workflow.indexOf('\n  reuse:\n'), workflow.indexOf('\n  hacs:\n'));
-  for (const id of ['smoke', 'golden', 'performance_smoke', 'backend']) {
+  for (const id of ['smoke', 'golden', 'performance_smoke', 'geometry_parity', 'backend']) {
     assert.match(reuse, new RegExp(`${id}_source_run:`), `${id}: source run output`);
     assert.match(reuse, new RegExp(`${id}_source_attempt:`), `${id}: source attempt output`);
     assert.match(reuse, new RegExp(`${id}_source_sha:`), `${id}: source SHA output`);
   }
-  assert.equal((reuse.match(/node scripts\/ci-proof\.mjs --marker=\.reuse-marker/g) || []).length, 4);
+  assert.equal((reuse.match(/node scripts\/ci-proof\.mjs --marker=\.reuse-marker/g) || []).length, 5);
   assert.equal(reuse.includes('lookup-only: true'), false,
     'marker contents must be restored and verified, not reduced to a cache-hit bit');
 });

tests_backend/junction_parity.py

@@ -0,0 +1,176 @@
+"""Fail-closed TypeScript/Python parity harness for wall-junction limits (#548).
+
+This module deliberately has no pytest or Home Assistant dependency.  The
+dedicated Validate job compiles the real TypeScript module, loads the real pure
+Python validator and compares both against one checked-in fixture.  Missing
+runtime/build prerequisites are setup errors, never a skipped test.
+"""
+from __future__ import annotations
+
+import argparse
+import json
+import math
+import os
+import subprocess
+from pathlib import Path
+from typing import Any
+
+from pure_imports import HOUSEPLAN_ROOT, REPO, load_pure
+
+DEFAULT_FIXTURE = REPO / "test" / "fixtures" / "junction-limits-parity.json"
+DEFAULT_BUILD_DIR = REPO / "test-build" / "junction-parity"
+
+_NODE_SCRIPT = r"""
+const junction = await import(process.env.HP_JUNCTION_MODULE);
+const geometry = await import(process.env.HP_GEOMETRY_MODULE);
+let raw = '';
+process.stdin.setEncoding('utf8');
+process.stdin.on('data', (chunk) => { raw += chunk; });
+process.stdin.on('end', () => {
+  const spaces = JSON.parse(raw);
+  const out = {};
+  for (const [name, space] of Object.entries(spaces)) {
+    const segments = space.wall_segments;
+    const violations = [
+      ...junction.checkNodes(segments),
+      ...junction.checkSegmentLengths(segments, space.cell_cm, geometry.GRID_STEP_N),
+      ...junction.checkNodeDistances(segments, space.cell_cm, geometry.GRID_STEP_N),
+    ];
+    out[name] = [...new Set(violations.map((item) => item.rule))].sort();
+  }
+  process.stdout.write(JSON.stringify(out));
+});
+"""
+
+
+def load_backend_validator():
+    """Load the production Python mirror without importing Home Assistant."""
+    return load_pure(
+        "custom_components.houseplan.junction_limits",
+        HOUSEPLAN_ROOT / "junction_limits.py",
+    )
+
+
+def _point(value: dict[str, Any], *, cell_cm: float, validator: Any) -> list[float]:
+    if "cm" in value and set(value).issubset({"cm", "units_offset"}):
+        point = value["cm"]
+        offset = value.get("units_offset", [0, 0])
+        return [validator.cm_to_units(float(point[0]), cell_cm) + float(offset[0]),
+                validator.cm_to_units(float(point[1]), cell_cm) + float(offset[1])]
+    if set(value) == {"units"}:
+        point = value["units"]
+        return [float(point[0]), float(point[1])]
+    raise ValueError(f"point must contain cm (optionally units_offset) or exactly units, got: {value!r}")
+
+
+def load_spaces(fixture_path: Path = DEFAULT_FIXTURE, *, validator: Any | None = None) -> dict[str, Any]:
+    """Expand the human-sized shared fixture into the production space shape."""
+    backend = validator or load_backend_validator()
+    data = json.loads(fixture_path.read_text(encoding="utf-8"))
+    if data.get("schema_version") != 1:
+        raise ValueError(f"unsupported parity fixture schema: {data.get('schema_version')!r}")
+    cell_cm = float(data["cell_cm"])
+    spaces: dict[str, Any] = {}
+    for case in data["cases"]:
+        name = str(case["name"])
+        if name in spaces:
+            raise ValueError(f"duplicate parity case: {name}")
+        segments = []
+        for index, source in enumerate(case["segments"]):
+            thickness = float(source["thickness_cm"])
+            if "ray_degrees" in source:
+                radians = math.radians(float(source["ray_degrees"]))
+                length = backend.cm_to_units(float(source.get("length_cm", 100)), cell_cm)
+                a = [0.0, 0.0]
+                b = [math.cos(radians) * length, math.sin(radians) * length]
+            else:
+                a = _point(source["a"], cell_cm=cell_cm, validator=backend)
+                b = _point(source["b"], cell_cm=cell_cm, validator=backend)
+            segments.append({"id": f"w{index}", "a": a, "b": b, "cm": thickness})
+        spaces[name] = {
+            "id": name,
+            "cell_cm": cell_cm,
+            "rooms": [],
+            "wall_segments": segments,
+            "partitions": [],
+            "room_drafts": [],
+            "openings": [],
+        }
+    if not spaces:
+        raise ValueError("parity fixture contains no cases")
+    return spaces
+
+
+def backend_rules(spaces: dict[str, Any], *, validator: Any) -> dict[str, list[str]]:
+    return {
+        name: sorted({violation[0] for violation in validator.space_violations(space)})
+        for name, space in spaces.items()
+    }
+
+
+def frontend_rules(spaces: dict[str, Any], *, build_dir: Path) -> dict[str, list[str]]:
+    junction_module = build_dir / "junction-limits.js"
+    geometry_module = build_dir / "space-geometry.js"
+    missing = [str(path) for path in (junction_module, geometry_module) if not path.is_file()]
+    if missing:
+        raise FileNotFoundError(
+            "geometry parity prerequisites are missing: " + ", ".join(missing)
+            + "; run `npx tsc -p tsconfig.junction-parity.json && node scripts/fix-test-build.mjs`"
+        )
+    env = os.environ.copy()
+    env["HP_JUNCTION_MODULE"] = junction_module.resolve().as_uri()
+    env["HP_GEOMETRY_MODULE"] = geometry_module.resolve().as_uri()
+    try:
+        result = subprocess.run(
+            ["node", "--input-type=module", "--eval", _NODE_SCRIPT],
+            cwd=REPO,
+            input=json.dumps(spaces),
+            capture_output=True,
+            text=True,
+            check=False,
+            env=env,
+        )
+    except FileNotFoundError as error:
+        raise RuntimeError("geometry parity requires Node.js, but `node` was not found") from error
+    if result.returncode != 0:
+        raise RuntimeError(
+            f"TypeScript geometry parity runner failed with exit {result.returncode}:\n{result.stderr}"
+        )
+    return json.loads(result.stdout)
+
+
+def run_parity(
+    *,
+    build_dir: Path = DEFAULT_BUILD_DIR,
+    fixture_path: Path = DEFAULT_FIXTURE,
+) -> int:
+    """Compare all shared scenarios and return their count on success."""
+    validator = load_backend_validator()
+    spaces = load_spaces(fixture_path, validator=validator)
+    python_result = backend_rules(spaces, validator=validator)
+    typescript_result = frontend_rules(spaces, build_dir=build_dir)
+    if typescript_result != python_result:
+        differences = {
+            name: {"typescript": typescript_result.get(name), "python": python_result.get(name)}
+            for name in spaces
+            if typescript_result.get(name) != python_result.get(name)
+        }
+        raise AssertionError(
+            "TypeScript/Python geometry parity diverged:\n"
+            + json.dumps(differences, indent=2, ensure_ascii=False)
+        )
+    return len(spaces)
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--build-dir", type=Path, default=DEFAULT_BUILD_DIR)
+    parser.add_argument("--fixture", type=Path, default=DEFAULT_FIXTURE)
+    args = parser.parse_args(argv)
+    count = run_parity(build_dir=args.build_dir, fixture_path=args.fixture)
+    print(f"geometry parity: {count} scenarios executed; TS/Python verdicts identical")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

tests_backend/test_junction_limits.py

@@ -1,19 +1,16 @@
 """Issue #329: the backend mirror of the wall-junction limits.
 
 Loaded by path, like the other pure backend tests, so Home Assistant is not
-needed. The parity test at the bottom is the important one: it feeds the same
+needed. Cross-runtime parity is owned by the fail-closed
-fixtures to the TypeScript checks and to this module and demands the same
+``tests_backend/junction_parity.py`` executable and its dedicated Validate job
-verdict, because two implementations of one rule are worth nothing if they can
+(#548); keeping it here as an optional pytest test was the silent-skip defect.
-disagree.
 """
 import json
 import os
-import subprocess
+from pathlib import Path
 
 import pytest
 
-from pathlib import Path
-
 from pure_imports import load_pure
 
 _ROOT = os.path.dirname(os.path.dirname(__file__))
@@ -203,74 +200,6 @@ def test_a_write_that_adds_a_violation_is_refused_with_a_stable_code():
     assert excinfo.value.space_id == "s"
 
 
-def test_parity_with_the_frontend_checks():
-    """The same fixtures must get the same verdict on both sides."""
-    fixtures = {
-        "angle-14": [(*ray(0), 15), (*ray(14), 15)],
-        "angle-15": [(*ray(0), 15), (*ray(15), 15)],
-        "valence-7": [(*ray(degree), 15)
-                      for degree in (0, 51, 102, 153, 204, 255, 306)],
-        "length-19": [([0.0, 0.0], [cm(19), 0.0], 15)],
-        "length-run": [([0.0, 0.0], [cm(10), 0.0], 15),
-                       ([cm(10), 0.0], [cm(20), 0.0], 15)],
-        "length-thickness": [([0.0, 0.0], [cm(25), 0.0], 30)],
-        "distance-4": [([0.0, 0.0], [cm(300), 0.0], 15),
-                       ([0.0, cm(4)], [cm(300), cm(4)], 15)],
-        "tee": [([0.0, 0.0], [cm(300), 0.0], 15),
-                ([cm(150), 0.0], [cm(150), cm(300)], 15)],
-        # #330 M2: границы из плана тестов §7 — их вердикт обязан совпадать
-        # у зеркал и не зависеть от пути §4.6 (as-is или через миграцию).
-        "angle-15-exact": [(*ray(0), 15), (*ray(15.0), 15)],
-        "length-20-exact": [([0.0, 0.0], [cm(20), 0.0], 15)],
-        "filler-run": [([0.0, 0.0], [cm(349), 0.0], 30),
-                       ([cm(349), 0.0], [cm(354), 0.0], 30),
-                       ([cm(354), 0.0], [cm(554), 0.0], 20)],
-        "distance-5-exact": [([0.0, 0.0], [cm(300), 0.0], 15),
-                             ([0.0, cm(5)], [cm(300), cm(5)], 15)],
-        # #331: пограничные классы точности — вердикт зеркал обязан совпасть.
-        "debris-node": [([-1e-8, 0.0], [cm(300), 0.0], 15),
-                        ([0.0, 0.0], [0.0, cm(300)], 15)],
-        "duplicate-wall": [([0.0, 0.0], [cm(300), 0.0], 15),
-                           ([0.0, 0.0], [cm(300), 0.0], 15)],
-        "collinear-fork": [([0.0, 0.0], [cm(100), 0.0], 15),
-                           ([cm(100), 0.0], [cm(160), 0.0], 15),
-                           ([cm(100), 0.0], [cm(220), 1e-9], 15)],
-    }
-    payload = {name: space(segments, space_id=name)
-               for name, segments in fixtures.items()}
-    mine = {name: rules(sp) for name, sp in payload.items()}
-
-    script = """
-import { checkNodes, checkSegmentLengths, checkNodeDistances } from './test-build/junction-limits.js';
-import { GRID_STEP_N } from './test-build/space-geometry.js';
-let raw = '';
-process.stdin.on('data', (chunk) => { raw += chunk; });
-process.stdin.on('end', () => {
-  const spaces = JSON.parse(raw);
-  const out = {};
-  for (const [name, space] of Object.entries(spaces)) {
-    const segments = space.wall_segments;
-    const violations = [
-      ...checkNodes(segments),
-      ...checkSegmentLengths(segments, space.cell_cm, GRID_STEP_N),
-      ...checkNodeDistances(segments, space.cell_cm, GRID_STEP_N),
-    ];
-    out[name] = [...new Set(violations.map((item) => item.rule))].sort();
-  }
-  process.stdout.write(JSON.stringify(out));
-});
-"""
-    if not os.path.isdir(os.path.join(_ROOT, "test-build")):
-        pytest.skip("test-build/ is not compiled; run npx tsc -p tsconfig.test.json")
-    result = subprocess.run(
-        ["node", "--input-type=module", "--eval", script],
-        cwd=_ROOT, input=json.dumps(payload), capture_output=True, text=True,
-        check=False,
-    )
-    assert result.returncode == 0, result.stderr
-    assert json.loads(result.stdout) == mine
-
-
 # --- #330: производительность без смены вердиктов ---
 
 def test_330_current_version_document_is_judged_as_is():

tests_backend/test_junction_parity.py

@@ -0,0 +1,20 @@
+"""Infrastructure contract of the fail-closed junction parity harness (#548)."""
+from pathlib import Path
+
+import pytest
+
+from junction_parity import DEFAULT_FIXTURE, frontend_rules, load_backend_validator, load_spaces
+
+
+def test_shared_fixture_is_nonempty_and_loads_every_named_scenario():
+    spaces = load_spaces(DEFAULT_FIXTURE)
+    assert len(spaces) == 15
+    assert "angle-14" in spaces
+    assert "distance-5-exact" in spaces
+    assert "debris-node" in spaces
+
+
+def test_missing_typescript_build_is_a_setup_failure_not_a_skip(tmp_path: Path):
+    spaces = load_spaces(DEFAULT_FIXTURE, validator=load_backend_validator())
+    with pytest.raises(FileNotFoundError, match="prerequisites are missing"):
+        frontend_rules(spaces, build_dir=tmp_path / "missing-build")

tsconfig.junction-parity.json

@@ -0,0 +1,13 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "esnext",
+    "outDir": "test-build/junction-parity",
+    "noEmit": false,
+    "declaration": false,
+    "incremental": false
+  },
+  "include": [
+    "src/junction-limits.ts"
+  ]
+}