docs: review document for #318

Issue: #318 User-Visible: no
fix: show entityless active controllers
2026-09-29 03:09:36 +00:00 · 2026-08-28 13:18:35 +00:00 · 2026-08-28 13:07:58 +00:00 · 2026-08-28 13:07:58 +00:00 · 2026-08-28 13:07:58 +00:00 · 2026-08-28 16:02:17 +03:00
511 changed files with 81181 additions and 31339 deletions
@@ -31,6 +31,16 @@ fi

 status=0

+# Локальный набор гейтов (#343). Выключен по умолчанию намеренно: 20-45 секунд на
+# каждый пуш, включая пуши одной строки документации, — цена, которую стоит
+# платить осознанно. Документация: docs/TESTING.md.
+if [ "${HP_PREPUSH_GATE:-}" = "1" ] && [ -f "$repo_root/scripts/pre-push-gate.mjs" ]; then
+  echo "pre-push-gate: HP_PREPUSH_GATE=1, прогоняю локальный набор" >&2
+  if ! node "$repo_root/scripts/pre-push-gate.mjs" >&2; then
+    status=1
+  fi
+fi
+
 while read -r local_ref local_sha remote_ref remote_sha; do
  # Deleting a remote branch pushes nothing to examine.
  if [ "$local_sha" = "$zero" ]; then
@@ -1,4 +1,4 @@
-name: Announce release
+name: Анонс релиза
 # Telegram notifications for t.me/ha_houseplan (owner request, 2026-08-07).
 # Stable releases are announced; prereleases are deliberately silent.
 # workflow_dispatch exists purely as a connectivity test button and therefore
@@ -36,6 +36,7 @@ permissions:
  contents: read
 jobs:
  telegram:
+    name: Оповещение в Telegram (только стабильные)
    if: ${{ github.event_name == 'workflow_dispatch' || (github.event_name == 'release' && github.event.release.prerelease == false) || (github.event_name == 'workflow_call' && inputs.prerelease == false) }}
    runs-on: ubuntu-latest
    steps:
@@ -9,7 +9,7 @@
 # локально через `npm run docs:accept -- --reviewed --from=<распакованный>`.
 # Та же конструкция, что у golden-эталонов, и по той же причине: картинки
 # попадают в репозиторий через явное решение, а не через бота.
-name: Docs screenshots
+name: Скриншоты документации

 on:
  workflow_dispatch:
@@ -24,6 +24,7 @@ permissions:

 jobs:
  capture:
+    name: Съёмка и сверка скриншот-индекса
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
@@ -47,6 +48,29 @@ jobs:
        run: npx playwright install chromium
      - name: Build the bundle the screenshots must come from
        run: npm run build
+      # oxipng без потерь снимает с набора ~19% (замер в #345 на pyoxipng 9.1.1;
+      # у 10.2.0 пресеты уровней перебалансированы, точная доля может отличаться,
+      # но кадры остаются пиксельно идентичными в любой версии — это перепаковка).
+      #
+      # Пин версии и контрольной суммы намеренно, а не `apt-get install oxipng`:
+      # пакет из образа раннера может пропасть или переехать, а падение шага
+      # съёмки стоит целого цикла приёмки. Тот же урок, что с azure-зеркалом
+      # Playwright (#175, #206).
+      - name: Установить oxipng
+        env:
+          OXIPNG_VERSION: 10.2.0
+          OXIPNG_SHA256: b33f84c73d42cb592bea5d84c431030b1e97784817693380dfcec7d9575f871e
+        run: |
+          set -euo pipefail
+          asset="oxipng-${OXIPNG_VERSION}-x86_64-unknown-linux-gnu.tar.gz"
+          curl -fsSL -o "$asset" \
+            "https://github.com/oxipng/oxipng/releases/download/v${OXIPNG_VERSION}/${asset}"
+          echo "${OXIPNG_SHA256}  ${asset}" | sha256sum -c -
+          mkdir -p "$HOME/.local/bin"
+          tar -xzf "$asset" --strip-components=1 -C "$HOME/.local/bin" \
+            "oxipng-${OXIPNG_VERSION}-x86_64-unknown-linux-gnu/oxipng"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+          "$HOME/.local/bin/oxipng" --version
      - name: Capture
        run: node demo/docs/capture.mjs
      # Вердикт до всякой приёмки. Само число изменившихся файлов ничего не
@@ -57,16 +81,30 @@ jobs:
      # разницу рендеринга.
      - name: Вердикт
        run: |
+          # Поле манифеста «до» — из закоммиченного состояния, «после» — из
+          # свежего. Читается одинаково для браузера и для упаковщика: оба
+          # переписывают все кадры сразу, и различить их причины обязан вердикт,
+          # а не человек по памяти (#345).
+          field() {
+            node -e "let s='';process.stdin.on('data',d=>s+=d).on('end',()=>{try{console.log(JSON.parse(s).$1||'')}catch{console.log('')}})"
+          }
          git status --porcelain docs/images
          changed=$(git diff --name-only docs/images | grep -c png || true)
-          before=$(git show HEAD:docs/images/screenshots.json | node -e \
-            "let s='';process.stdin.on('data',d=>s+=d).on('end',()=>{try{console.log(JSON.parse(s).chromium||'')}catch{console.log('')}})")
+          before=$(git show HEAD:docs/images/screenshots.json | field chromium)
          after=$(node -e "console.log(require('./docs/images/screenshots.json').chromium)")
+          packer_before=$(git show HEAD:docs/images/screenshots.json | field oxipng)
+          packer_after=$(node -e "console.log(require('./docs/images/screenshots.json').oxipng || '')")
          echo "--- изменившихся PNG: $changed"
          echo "--- Chromium: было «${before:-не записан}», стало «$after»"
-          if [ "$before" = "$after" ] && [ "$changed" -gt 0 ]; then
-            echo "ВЕРДИКТ: тот же браузер, а картинки изменились — изменился продукт."
-            echo "Смотрите на кадры: если изменение ожидаемое, принимайте."
+          echo "--- oxipng: было «${packer_before:-не записан}», стало «${packer_after:-нет}»"
+          if [ "$packer_before" != "$packer_after" ] && [ "$changed" -gt 0 ]; then
+            echo "ВЕРДИКТ: изменился упаковщик, поэтому переписаны все кадры сразу."
+            echo "Это перепаковка без потерь: пиксели те же, размер меньше на ~19%."
+            echo "Ожидаемо один раз — при включении oxipng либо при смене его версии."
+            echo "Проверить можно сравнением декодированных кадров, а не байтов."
+          elif [ "$before" = "$after" ] && [ "$changed" -gt 0 ]; then
+            echo "ВЕРДИКТ: тот же браузер и тот же упаковщик, а картинки изменились —"
+            echo "изменился продукт. Смотрите на кадры: если изменение ожидаемое, принимайте."
          elif [ "$before" != "$after" ]; then
            echo "ВЕРДИКТ: браузер другой, поэтому переписаны все кадры сразу."
            echo "Это ожидаемо один раз — при переходе на канонический прогон."
@@ -1,15 +1,21 @@
-name: Mutation gate
+name: Мутационный гейт

 # Реестр известных поломок (issue #85): каждый мутант ломает продуктовый код
 # известным способом, и объявленный тест ОБЯЗАН на этом покраснеть. Тест,
 # оставшийся зелёным на сломанном коде, ничего не защищает — он лишь выглядит
 # защитой, и это хуже его отсутствия.
 #
-# Прогон дорогой: пересборка бандла на каждого мутанта. Поэтому он не входит в
-# Validate и не идёт на каждый push. Его место — перед стабильным релизом
-# (PROCESS.md §8) и раз в неделю по расписанию, чтобы дрейф тестов не копился
-# до релиза. Дешёвая половина — «якоря патчей живы, guard-файлы существуют» —
-# идёт с обычными юнитами: test/mutation-gate.test.mjs.
+# Прогон дорогой, поэтому он не входит в Validate и не идёт на каждый push.
+# Его место — перед стабильным релизом (PROCESS.md §8) и раз в неделю по
+# расписанию, чтобы дрейф тестов не копился до релиза. Дешёвая половина —
+# «якоря патчей живы, guard-файлы существуют» — идёт с обычными юнитами:
+# test/mutation-gate.test.mjs.
+#
+# #332: бандл собирается только мутантам с браузерным гвардом (guardNeedsBundle),
+# компиляция тестов в worktree стартует с тёплого test-build (инкрементальный
+# tsc), а реестр режется на четыре чересполосных шарда — полный прогон
+# укладывается в десятки минут вместо часов. Локальный дифф-режим:
+# node scripts/mutation-gate.mjs --changed origin/dev..HEAD

 on:
  workflow_dispatch:
@@ -31,9 +37,14 @@ concurrency:

 jobs:
  mutants:
+    name: "Мутанты: каждый обязан красить тесты (шард ${{ matrix.shard }} из 4)"
    runs-on: ubuntu-latest
-    # Все мутанты × (сборка + свой guard) — это десятки минут, и это нормально:
-    # гейт предрелизный. Час — потолок против зависшего Chromium.
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2, 3, 4]
+    # Шард ~64 мутантов × свой guard; бандл собирают только браузерные гварды.
+    # Час — потолок против зависшего Chromium.
    timeout-minutes: 60
    steps:
      - uses: actions/checkout@v7
@@ -69,5 +80,8 @@ jobs:
      - name: Реестр применим к текущему коду
        run: node scripts/mutation-gate.mjs --check

+      - name: Тёплый test-build для инкрементальной компиляции мутантов
+        run: npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs
+
      - name: Каждый тест ловит свою поломку
-        run: node scripts/mutation-gate.mjs
+        run: node scripts/mutation-gate.mjs --shard=${{ matrix.shard }}/4
@@ -1,4 +1,4 @@
-name: Full Performance
+name: Полные бенчмарки производительности

 on:
  # Every main promotion is a stable-release candidate and must have an
@@ -24,10 +24,21 @@ concurrency:

 jobs:
  performance:
-    # Base and candidate stay sequential on one hosted runner. Splitting them
-    # across runners would turn machine variance into a false regression.
+    name: Бенчмарки рендера и геометрии
+    # Every profile keeps base and candidate sequential on one hosted runner.
+    # Independent profile pairs run in parallel: cross-profile timing is never
+    # compared, while serialising all five pairs cannot fit the job timeout.
    runs-on: ubuntu-latest
    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        profile:
+          - large-house
+          - isometric
+          - plan-snap
+          - blend
+          - overlay
    steps:
      - name: Check out candidate
        uses: actions/checkout@v7
@@ -149,38 +160,78 @@ jobs:
          npm --prefix candidate run build
          (cd candidate && node scripts/bundle-sync.mjs)
          npm --prefix baseline run build
-          (cd baseline && node scripts/bundle-sync.mjs)
-
-      - name: Capture base and candidate profiles
-        working-directory: candidate
-        run: |
-          npm run benchmark:large-house -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/baseline.json
-          npm run benchmark:large-house -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/candidate.json
-          npm run benchmark:large-house-isometric -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/isometric-baseline.json
-          npm run benchmark:large-house-isometric -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/isometric-candidate.json
-          npm run benchmark:large-house-plan-snap -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/plan-snap-baseline.json
-          npm run benchmark:large-house-plan-snap -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/plan-snap-candidate.json
-          npm run benchmark:glow -- --profile=large-light-blend-v1 --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/blend-baseline.json
-          npm run benchmark:glow -- --profile=large-light-blend-v1 --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/blend-candidate.json
-          npm run benchmark:glow -- --profile=large-house-glow-overlay-v1 --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/overlay-baseline.json
-          npm run benchmark:glow -- --profile=large-house-glow-overlay-v1 --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/overlay-candidate.json
-          if ! grep -q "glow_enabled" ../baseline/src/logic.ts; then
-            echo "Base predates independent Glow; bootstrap relative overlay baseline, keep absolute gate"
-            cp ../artifacts/performance/overlay-candidate.json ../artifacts/performance/overlay-baseline.json
+          if [ -f baseline/scripts/bundle-sync.mjs ]; then
+            (cd baseline && node scripts/bundle-sync.mjs)
+          else
+            echo "::notice::The comparison base predates bundle-sync.mjs; materializing its freshly built bundle with the legacy copy path."
+            mkdir -p baseline/custom_components/houseplan/frontend baseline/demo/srv/assets
+            cp baseline/dist/houseplan-card.js baseline/custom_components/houseplan/frontend/houseplan-card.js
+            cp baseline/dist/houseplan-card.js baseline/demo/srv/assets/houseplan-card.js
          fi

-      - name: Enforce relative and absolute performance budgets
+      - name: Capture base and candidate profile
        working-directory: candidate
+        env:
+          PROFILE: ${{ matrix.profile }}
        run: |
-          npm run benchmark:compare -- --baseline=../artifacts/performance/baseline.json --candidate=../artifacts/performance/candidate.json --output=../artifacts/performance/comparison.json
-          npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-isometric.json --baseline=../artifacts/performance/isometric-baseline.json --candidate=../artifacts/performance/isometric-candidate.json --output=../artifacts/performance/isometric-comparison.json
-          npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-plan-snap.json --baseline=../artifacts/performance/plan-snap-baseline.json --candidate=../artifacts/performance/plan-snap-candidate.json --output=../artifacts/performance/plan-snap-comparison.json
-          npm run benchmark:compare -- --budgets=demo/performance/budgets-large-light-blend.json --baseline=../artifacts/performance/blend-baseline.json --candidate=../artifacts/performance/blend-candidate.json --output=../artifacts/performance/blend-comparison.json
-          npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-glow-overlay.json --baseline=../artifacts/performance/overlay-baseline.json --candidate=../artifacts/performance/overlay-candidate.json --output=../artifacts/performance/overlay-comparison.json
+          mkdir -p ../artifacts/performance
+          case "$PROFILE" in
+            large-house)
+              npm run benchmark:large-house -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/baseline.json
+              npm run benchmark:large-house -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/candidate.json
+              ;;
+            isometric)
+              npm run benchmark:large-house-isometric -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/isometric-baseline.json
+              npm run benchmark:large-house-isometric -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/isometric-candidate.json
+              ;;
+            plan-snap)
+              npm run benchmark:large-house-plan-snap -- --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/plan-snap-baseline.json
+              npm run benchmark:large-house-plan-snap -- --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/plan-snap-candidate.json
+              ;;
+            blend)
+              npm run benchmark:glow -- --profile=large-light-blend-v1 --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/blend-baseline.json
+              npm run benchmark:glow -- --profile=large-light-blend-v1 --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/blend-candidate.json
+              ;;
+            overlay)
+              npm run benchmark:glow -- --profile=large-house-glow-overlay-v1 --target-root=../baseline --samples=7 --warmups=1 --output=../artifacts/performance/overlay-baseline.json
+              npm run benchmark:glow -- --profile=large-house-glow-overlay-v1 --target-root=. --samples=7 --warmups=1 --output=../artifacts/performance/overlay-candidate.json
+              if ! grep -q "glow_enabled" ../baseline/src/logic.ts; then
+                echo "Base predates independent Glow; bootstrap relative overlay baseline, keep absolute gate"
+                cp ../artifacts/performance/overlay-candidate.json ../artifacts/performance/overlay-baseline.json
+              fi
+              ;;
+            *)
+              echo "::error::Unknown performance profile: $PROFILE"
+              exit 1
+              ;;
+          esac

-      - name: Upload full performance reports
+      - name: Enforce relative and absolute performance budget
+        working-directory: candidate
+        env:
+          PROFILE: ${{ matrix.profile }}
+        run: |
+          case "$PROFILE" in
+            large-house)
+              npm run benchmark:compare -- --baseline=../artifacts/performance/baseline.json --candidate=../artifacts/performance/candidate.json --output=../artifacts/performance/comparison.json
+              ;;
+            isometric)
+              npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-isometric.json --baseline=../artifacts/performance/isometric-baseline.json --candidate=../artifacts/performance/isometric-candidate.json --output=../artifacts/performance/isometric-comparison.json
+              ;;
+            plan-snap)
+              npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-plan-snap.json --baseline=../artifacts/performance/plan-snap-baseline.json --candidate=../artifacts/performance/plan-snap-candidate.json --output=../artifacts/performance/plan-snap-comparison.json
+              ;;
+            blend)
+              npm run benchmark:compare -- --budgets=demo/performance/budgets-large-light-blend.json --baseline=../artifacts/performance/blend-baseline.json --candidate=../artifacts/performance/blend-candidate.json --output=../artifacts/performance/blend-comparison.json
+              ;;
+            overlay)
+              npm run benchmark:compare -- --budgets=demo/performance/budgets-large-house-glow-overlay.json --baseline=../artifacts/performance/overlay-baseline.json --candidate=../artifacts/performance/overlay-candidate.json --output=../artifacts/performance/overlay-comparison.json
+              ;;
+          esac
+
+      - name: Upload full performance report
        if: always()
        uses: actions/upload-artifact@v7
        with:
-          name: full-performance
+          name: full-performance-${{ matrix.profile }}
          path: artifacts/performance
@@ -1,4 +1,4 @@
-name: Process
+name: Ревью-конвейер

 # Событийный конвейер процесса (PROCESS.md). Смена статусной метки — это
 # сообщение: она порождает событие, событие запускает следующий шаг.
@@ -35,6 +35,7 @@ permissions:

 jobs:
  guard:
+    name: "Страж: ребейз на dev и предпосылки ревью"
    runs-on: ubuntu-latest
    outputs:
      stage: ${{ steps.decide.outputs.stage }}
@@ -162,6 +163,7 @@ jobs:
          echo "limit=$limit" >> "$GITHUB_OUTPUT"

  review:
+    name: "Ревью (Claude): вердикт в issue"
    needs: guard
    if: needs.guard.outputs.stage != ''
    runs-on: ubuntu-latest
@@ -287,6 +289,16 @@ jobs:
          echo "note=Ветка приведена к dev конвейером до ревью: поверх легло $behind коммит(ов) dev, $short_before -> $short_after. После ребейза это другой код (§7.2) — разбор полный, а не по дельте." >> "$GITHUB_OUTPUT"
          echo "ветка $BRANCH приведена к dev: $short_before -> $short_after"

+      # Материал ревью — конкретный SHA (#312). Вердикт применим только к
+      # нему: если во время ревью в ветку прилетит коммит, шаг слияния обязан
+      # это заметить и отказаться, а не молча увезти в dev непроверенный код.
+      - name: Зафиксировать SHA материала ревью
+        id: material
+        if: steps.rebase.outputs.conflict != 'true'
+        run: |
+          echo "sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
+          echo "материал ревью: $(git rev-parse --short HEAD)"
+
      # Конфликт возвращает задачу автору ДО ревью. Инвариант «после прогона
      # метка меняется всегда» при этом держится: возврат в S6-in-progress —
      # тоже смена метки, и автор не ждёт впустую.
@@ -315,6 +327,41 @@ jobs:
            --add-label S6-in-progress --remove-label S7-code-review
          echo "S7-code-review -> S6-in-progress (ревью не запускалось)"

+      # Ревьюер перегонял tsc, юниты и сборку заново в каждом раунде, хотя
+      # Validate на том же SHA уже зелёный (#343). Это не тщательность: бюджет
+      # ревью тратится на повторение CI вместо чтения кода.
+      #
+      # Доказательство здесь такое же строгое, как у reuse-маркеров (#208): не
+      # «недавно было зелено», а «completed success ровно на этом SHA». После
+      # ребейза SHA другой, прогона для него нет — и ревьюер честно гоняет сам.
+      - name: Зелёные гейты на этом SHA
+        id: validated
+        if: steps.rebase.outputs.conflict != 'true'
+        env:
+          GH_TOKEN: ${{ secrets.HP_PROCESS_TOKEN }}
+        run: |
+          sha=$(git rev-parse HEAD)
+          short=$(git rev-parse --short HEAD)
+          row=$(gh run list --repo "${{ github.repository }}" --workflow validate.yml \
+            --commit "$sha" --limit 5 \
+            --json status,conclusion,url \
+            --jq '[.[] | select(.status=="completed" and .conclusion=="success")][0] // empty')
+          {
+            echo 'note<<EOF_NOTE'
+            if [ -n "$row" ]; then
+              url=$(printf '%s' "$row" | node -e 'let s="";process.stdin.on("data",d=>s+=d).on("end",()=>process.stdout.write(JSON.parse(s).url||""))')
+              echo "**Дешёвые гейты на этом SHA уже подтверждены** (#343). Validate на \`$short\` завершился success: $url"
+              echo ""
+              echo "Значит \`npx tsc --noEmit\`, \`npm test\` и \`npm run build\` со сверкой копий бандла перегонять не нужно — сошлись на этом прогоне, назвав его ссылкой. Бюджет раунда тратится на чтение кода."
+              echo ""
+              echo "Что Validate НЕ покрывает и остаётся за тобой: смоки, выбранные по диффу; golden, если diff трогает рендер; инварианты модели на конкретной конфигурации; и любой гейт, который требуют AC задачи."
+            else
+              echo "**Зелёного Validate на этом SHA (\`$short\`) нет** — прогон не найден, не завершён либо не success. Дешёвые гейты прогоняешь сам и называешь результат."
+            fi
+            echo 'EOF_NOTE'
+          } >> "$GITHUB_OUTPUT"
+          if [ -n "$row" ]; then echo "Validate на $short: зелёный"; else echo "Validate на $short: зелёного нет"; fi
+
      # Зависимости ставятся ПОСЛЕ переключения на ветку задачи: lockfile мог
      # измениться именно в ней, и установка по копии из dev дала бы не то дерево.
      - name: Установить зависимости
@@ -441,8 +488,10 @@ jobs:
            правке — не тщательность, а потеря времени: полные наборы это
            предрелизный гейт (PROCESS.md §8), а не гейт ревью.

-            Всегда, они дешёвые, и в повторном раунде тоже: код изменился,
-            а стоят они минуты:
+            ${{ steps.validated.outputs.note }}
+
+            Если зелёного прогона на этом SHA нет — прогоняешь сам, они дешёвые,
+            и в повторном раунде тоже: код изменился, а стоят они минуты:
              `npx tsc --noEmit`, `npm test`, `npm run build` со сверкой трёх
              копий бандла. Плюс `node scripts/check-docs.mjs`, если diff трогает
              `src/**`: отпечаток скриншотов документации считается по всему
@@ -701,14 +750,42 @@ jobs:
          GH_TOKEN: ${{ secrets.HP_PROCESS_TOKEN }}
          BRANCH: ${{ steps.branch.outputs.name }}
          NUM: ${{ github.event.issue.number }}
+          MATERIAL_SHA: ${{ steps.material.outputs.sha }}
        run: |
          if [ -z "$BRANCH" ]; then
            echo "::error::ветки задачи нет — сливать нечего"
            echo "merged=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi
-          git fetch -q origin dev
-          git checkout -q -B merge-into-dev "origin/$BRANCH"
+          git fetch -q origin dev "$BRANCH"
+          # #312: сливается только проверенный код. Допустимые вершины ветки:
+          # сам SHA материала либо он же плюс ровно один коммит публикации
+          # документа ревью (дифф только docs/reviews/). Любой другой коммит —
+          # ветка уехала после ревью, вердикт к ней не применим: возврат в
+          # S6-in-progress через merged=false, как при конфликте.
+          actual=$(git rev-parse "origin/$BRANCH")
+          reviewed="$MATERIAL_SHA"
+          fresh=false
+          if [ "$actual" = "$reviewed" ]; then
+            fresh=true
+          elif [ "$(git rev-parse "$actual^" 2>/dev/null)" = "$reviewed" ] \
+            && [ -z "$(git diff --name-only "$reviewed" "$actual" -- . ':!docs/reviews')" ]; then
+            fresh=true
+          fi
+          if [ "$fresh" != true ]; then
+            echo "merged=false" >> "$GITHUB_OUTPUT"
+            echo "::warning::ветка $BRANCH уехала после проверенного SHA $reviewed (сейчас $actual) — слияние отменено (#312)"
+            cat > /tmp/stale-verdict.md <<EOF
+          **Слияние отменено: ветка изменилась после проверенного материала (#312).**
+
+          Ревью выполнялось на \\`$(git rev-parse --short "$reviewed")\\`, а вершина ветки сейчас \\`$(git rev-parse --short "$actual")\\` — в ней есть коммиты, которых вердикт не покрывает. Зелёный вердикт остаётся в силе только для проверенного SHA.
+
+          Задача переведена в \\`S6-in-progress\\`. Дальше: убедиться, что вершина ветки — именно то, что должно ехать в dev, и вернуть метку \\`S7-code-review\\` — новый заход ревью проверит актуальный код.
+          EOF
+            gh issue comment "$NUM" --repo "${{ github.repository }}" --body-file /tmp/stale-verdict.md
+            exit 0
+          fi
+          git checkout -q -B merge-into-dev "$actual"
          if ! git -c user.name="claude[bot]" \
                   -c user.email="209825114+claude[bot]@users.noreply.github.com" \
                   rebase origin/dev; then
@@ -1,4 +1,4 @@
-name: Publish prerelease
+name: Публикация пре-релиза (ручная)
 run-name: Publish ${{ inputs.tag }}

 on:
@@ -19,6 +19,7 @@ concurrency:

 jobs:
  gate:
+    name: "Гейт: зелёная Проверка и релизный контракт"
    runs-on: ubuntu-latest
    outputs:
      sha: ${{ steps.candidate.outputs.sha }}
@@ -61,6 +62,7 @@ jobs:
        run: node scripts/release-gate.mjs "$SHA"

  publish:
+    name: Публикация тега и релиза
    needs: gate
    runs-on: ubuntu-latest
    outputs:
@@ -80,17 +82,13 @@ jobs:
          set -euo pipefail
          npm ci
          npm run build
-          cmp dist/houseplan-card.js custom_components/houseplan/frontend/houseplan-card.js
+          node scripts/bundle-tree.mjs dist custom_components/houseplan/frontend
+          npm run bundle:budget
          VERSION=${TAG#v}
-          grep -Fq "$VERSION" dist/houseplan-card.js
+          grep -RFq "$VERSION" dist
          (cd custom_components/houseplan && zip -qr ../../houseplan.zip .)
-          unzip -l houseplan.zip | grep -q "manifest.json"
-          ZIP_VERSION=$(unzip -p houseplan.zip manifest.json | node -e \
-            "let s='';process.stdin.on('data',d=>s+=d).on('end',()=>process.stdout.write(JSON.parse(s).version))")
-          test "$ZIP_VERSION" = "$VERSION" || {
-            echo "::error::houseplan.zip manifest version $ZIP_VERSION != $VERSION"
-            exit 1
-          }
+          node scripts/verify-houseplan-zip.mjs houseplan.zip \
+            custom_components/houseplan/frontend "$VERSION"
          test -s dist/houseplan-card.js
          test -s houseplan.zip
      - name: Create or verify the annotated tag
@@ -198,6 +196,7 @@ jobs:
  # A manual step after a successful release is the worst kind: by the time it is
  # due, the work already looks finished, which is exactly why it gets forgotten.
  close-merged:
+    name: Закрытие вошедших issue
    needs: [gate, publish]
    if: ${{ needs.publish.outputs.newly_published == 'true' }}
    runs-on: ubuntu-latest
@@ -245,6 +244,7 @@ jobs:
          }

  announce:
+    name: Комментарий о публикации
    needs: [gate, publish]
    if: ${{ needs.publish.outputs.newly_published == 'true' }}
    uses: ./.github/workflows/announce.yml
@@ -1,4 +1,4 @@
-name: Attach HACS zip to release
+name: HACS-zip к релизу
 # hacs.json declares zip_release + filename=houseplan.zip, so every release
 # (prereleases included) must carry the asset — HACS installs from it and
 # GitHub's public download counter becomes a free per-version install metric
@@ -19,6 +19,7 @@ permissions:
  contents: write
 jobs:
  zip:
+    name: Собрать houseplan.zip и приложить к релизу
    runs-on: ubuntu-latest
    steps:
      - name: Resolve tag
@@ -33,7 +34,7 @@ jobs:
      - name: Build houseplan.zip (contents of custom_components/houseplan at zip root)
        run: cd custom_components/houseplan && zip -qr ../../houseplan.zip .
      - name: Sanity check
-        run: unzip -l houseplan.zip | grep -q "manifest.json"
+        run: node scripts/verify-houseplan-zip.mjs houseplan.zip custom_components/houseplan/frontend
      - name: Upload asset
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -1,4 +1,4 @@
-name: Release
+name: "Релиз: ассеты после зелёной проверки"
 on:
  release:
    types: [published]
@@ -14,6 +14,7 @@ jobs:
  # Needs a push with a token that has the `workflow` scope (the ordinary
  # Personal Access Token used for `git push` refuses workflow file updates).
  gate:
+    name: "Гейт: зелёная Проверка точного SHA тега"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
@@ -42,8 +43,9 @@ jobs:
        run: |
          set -euo pipefail
          SHA=$(git rev-parse HEAD)
-          node scripts/release-gate.mjs "$SHA" --workflow=performance.yml --label="Full Performance"
+          node scripts/release-gate.mjs "$SHA" --workflow=performance.yml --label="Полные бенчмарки производительности"
  build:
+    name: Сборка бандла и загрузка ассетов
    needs: gate
    runs-on: ubuntu-latest
    steps:
@@ -65,12 +67,14 @@ jobs:
        with:
          name: continuity-screencast
          path: artifacts/continuity-screencast
-      - run: cp dist/houseplan-card.js custom_components/houseplan/frontend/
+      - name: Verify the complete committed frontend tree
+        run: node scripts/bundle-tree.mjs dist custom_components/houseplan/frontend
      - name: Attach card to release
        uses: softprops/action-gh-release@v3
        with:
          files: dist/houseplan-card.js
  hacs-discovery:
+    name: HACS-видимость пре-релиза (порядок бет)
    # HACS 2.0.x takes the first prerelease in GitHub's response instead of
    # sorting SemVer. A valid asset can therefore be invisible to beta users
    # (beta.10 appeared after beta.9). Keep the release asset, but
@@ -1,4 +1,4 @@
-name: Validate
+name: Проверка (CI)

 on:
  push:
@@ -21,25 +21,42 @@ concurrency:
  cancel-in-progress: true

 jobs:
-  docs:
+  # Четыре секундных скрипта жили четырьмя job, каждая со своим checkout и
+  # setup-node ради нескольких секунд работы (#336). Здесь они шаги одной job.
+  #
+  # Независимость при этом сохранена намеренно: у каждого шага
+  # `continue-on-error`, поэтому упавший провенанс не прячет результат
+  # процессного гейта, а вердикт в конце падает, если упал хоть один. Прежняя
+  # запись «job независимый: краснеет сам и не роняет остальные» продолжает
+  # действовать — на уровне шагов, с той же гранулярностью в логе.
+  preflight:
+    name: "Предполётные проверки: документация, провенанс, процесс"
    runs-on: ubuntu-latest
    steps:
+      # `blob:none` при полной истории (#345): этой job нужны сообщения
+      # коммитов, трейлеры и ИМЕНА изменённых файлов, а не содержимое старых
+      # ревизий. Полный клон стоит 215 МБ против 26 МБ, и 32% этого веса —
+      # скриншоты документации, переснятые 196 раз.
+      #
+      # Коммиты и деревья скачиваются целиком, поэтому диапазоны и `merge-base`
+      # работают как раньше. Единственная догрузка по требованию здесь —
+      # `git show origin/main:.github/workflows/process.yml`: один блоб.
      - uses: actions/checkout@v7
+        with: { fetch-depth: 0, filter: 'blob:none' }
      - uses: actions/setup-node@v7
        with: { node-version: 22 }
-      - name: Validate public documentation
+
+      - name: "Документация: гайды, ченджлоги, скриншот-индекс"
+        id: docs
+        continue-on-error: true
        run: node scripts/check-docs.mjs --external

-  # Конвейер читает `process.yml` из ветки по умолчанию, поэтому файл обязан
-  # совпадать в `main` и `dev`. До этой проверки совпадение держалось на
-  # дисциплине: каждая правка требовала двух пушей и ручной сверки.
-  process-workflow-sync:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v7
-        with:
-          fetch-depth: 0
-      - name: process.yml идентичен в main и dev
+      # Конвейер читает `process.yml` из ветки по умолчанию, поэтому файл обязан
+      # совпадать в `main` и `dev`. До этой проверки совпадение держалось на
+      # дисциплине: каждая правка требовала двух пушей и ручной сверки.
+      - name: "Процесс: process.yml идентичен в main и dev"
+        id: workflow_sync
+        continue-on-error: true
        run: |
          git fetch --quiet origin main dev
          if diff <(git show origin/main:.github/workflows/process.yml) \
@@ -52,14 +69,9 @@ jobs:
            exit 1
          fi

-  provenance:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v7
-        with: { fetch-depth: 0 }
-      - uses: actions/setup-node@v7
-        with: { node-version: 22 }
-      - name: Validate commit trailers and hook mode
+      - name: "Провенанс коммитов: трейлеры и эталоны"
+        id: provenance
+        continue-on-error: true
        env:
          EVENT_NAME: ${{ github.event_name }}
          BEFORE_SHA: ${{ github.event.before }}
@@ -70,19 +82,14 @@ jobs:
          git fetch -q origin "refs/heads/$DEVELOPMENT_BRANCH:refs/remotes/origin/$DEVELOPMENT_BRANCH"
          node scripts/validate-commit-provenance.mjs --check-hook-mode --github-range

-  # Догоняющая проверка процесса (PROCESS.md §10.3). Хуки ловят нарушение на
-  # машине автора, но их можно обойти `--no-verify`, а коммиты идут прямо в dev
-  # без PR — GitHub на своей стороне не блокирует ничего. Это последнее место,
-  # где нарушение правила №1 ловится машиной. Job независимый: краснеет сам и
-  # не роняет остальные, откат — удалить его отсюда, скрипт остаётся рабочим.
-  process-gate:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v7
-        with: { fetch-depth: 0 }
-      - uses: actions/setup-node@v7
-        with: { node-version: 22 }
-      - name: Process gate
+      # Догоняющая проверка процесса (PROCESS.md §10.3). Хуки ловят нарушение на
+      # машине автора, но их можно обойти `--no-verify`, а коммиты идут прямо в
+      # dev без PR — GitHub на своей стороне не блокирует ничего. Это последнее
+      # место, где нарушение правила №1 ловится машиной. Откат — удалить шаг,
+      # скрипт остаётся рабочим.
+      - name: "Процессный гейт: диапазон, трейлеры, статусы issue"
+        id: process_gate
+        continue-on-error: true
        env:
          EVENT_NAME: ${{ github.event_name }}
          BEFORE_SHA: ${{ github.event.before }}
@@ -96,6 +103,33 @@ jobs:
          git fetch -q origin "refs/heads/$DEVELOPMENT_BRANCH:refs/remotes/origin/$DEVELOPMENT_BRANCH"
          node scripts/process-gate.mjs --github-range --issues

+      # Вердикт обязан быть громким и перечислять всё упавшее сразу: иначе
+      # слияние job стоило бы автору лишнего круга «починил одно — узнал о
+      # втором».
+      - name: Вердикт предполётных проверок
+        env:
+          DOCS: ${{ steps.docs.outcome }}
+          WORKFLOW_SYNC: ${{ steps.workflow_sync.outcome }}
+          PROVENANCE: ${{ steps.provenance.outcome }}
+          PROCESS_GATE: ${{ steps.process_gate.outcome }}
+        run: |
+          fail=0
+          check() {
+            if [ "$2" = "success" ]; then
+              echo "ok   $1"
+            else
+              echo "FAIL $1 ($2)"
+              echo "- **$1**: $2" >> "$GITHUB_STEP_SUMMARY"
+              fail=1
+            fi
+          }
+          echo "### Предполётные проверки" >> "$GITHUB_STEP_SUMMARY"
+          check "документация" "$DOCS"
+          check "process.yml в main и dev" "$WORKFLOW_SYNC"
+          check "провенанс коммитов" "$PROVENANCE"
+          check "процессный гейт" "$PROCESS_GATE"
+          exit $fail
+
  # Классификация изменённых путей: тяжёлые job идут только там, где менялось
  # относящееся к ним. НА DEV ФИЛЬТРОВ НЕТ: гейт беты принимает «зелёный Validate
  # на точном SHA», и если объём прогона зависит от diff, «зелёный» перестаёт
@@ -104,14 +138,17 @@ jobs:
  # экономят на ветках задач, где Validate — ранний сигнал: настоящую приёмку
  # там делает код-ревью, которое гоняет гейты само (#127).
  changes:
+    name: Классификация изменённых файлов
    runs-on: ubuntu-latest
    outputs:
      frontend: ${{ steps.classify.outputs.frontend }}
      backend: ${{ steps.classify.outputs.backend }}
      integration: ${{ steps.classify.outputs.integration }}
    steps:
+      # `git diff --name-only` содержимого файлов не читает вовсе, поэтому
+      # блобы истории этой job не нужны ни на одном шаге (#345).
      - uses: actions/checkout@v7
-        with: { fetch-depth: 0 }
+        with: { fetch-depth: 0, filter: 'blob:none' }
      - id: classify
        env:
          EVENT_NAME: ${{ github.event_name }}
@@ -128,10 +165,28 @@ jobs:
          zero=$(printf '%040d' 0)
          base="$BEFORE_SHA"
          if [ "$EVENT_NAME" = "pull_request" ]; then base="$BASE_SHA"; fi
+          # #347: непустой before, которого больше не существует, — это
+          # force-push (ребейз/аменд переписал историю ветки). Диапазон в
+          # этом случае НЕ угадывается: merge-base после переписанной истории
+          # уже выдавал «изменились только два doc-файла» при реальном диффе
+          # в custom_components/**, и тяжёлые job тихо скипались, а общий
+          # статус рана оставался success — ровно класс тихого пропуска
+          # #171/#207. Force-push редок, полный прогон дешевле ложного
+          # «зелёного».
+          if [ -n "$base" ] && [ "$base" != "$zero" ] \
+             && ! git cat-file -e "$base" 2>/dev/null; then
+            echo "force-push: before=$base переписан — полный прогон без классификации"
+            {
+              echo "### Классификация изменённых файлов"
+              echo "\`before\` (=$base) переписан force-push'ем: диапазон недоказуем,"
+              echo "все тяжёлые job запускаются без фильтра путей (#347)."
+            } >> "$GITHUB_STEP_SUMMARY"
+            printf 'frontend=true\nbackend=true\nintegration=true\n' >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
          # Новая ветка: before нулевой, диапазон считается от merge-base с dev,
          # иначе классифицировалась бы вся история.
-          if [ -z "$base" ] || [ "$base" = "$zero" ] \
-             || ! git cat-file -e "$base" 2>/dev/null; then
+          if [ -z "$base" ] || [ "$base" = "$zero" ]; then
            git fetch -q origin dev
            base=$(git merge-base origin/dev "$HEAD_SHA" || echo "$HEAD_SHA~1")
          fi
@@ -158,6 +213,7 @@ jobs:
  # CARD_VERSION и package.json входят в фингерпринт, поэтому ключи кандидата
  # заведомо новые и полный набор гейтов перед бетой и релизом идёт всегда.
  reuse:
+    name: "Переиспользование: это дерево уже проверено"
    runs-on: ubuntu-latest
    outputs:
      smoke: ${{ steps.probe.outputs.smoke }}
@@ -237,6 +293,7 @@ jobs:
          waive backend "$BACKEND"

  hacs:
+    name: "HACS: валидация репозитория"
    needs: changes
    if: needs.changes.outputs.integration == 'true'
    runs-on: ubuntu-latest
@@ -248,6 +305,7 @@ jobs:
          category: integration

  hassfest:
+    name: "Hassfest: манифест интеграции"
    needs: changes
    if: needs.changes.outputs.integration == 'true'
    runs-on: ubuntu-latest
@@ -257,11 +315,15 @@ jobs:
        uses: home-assistant/actions/hassfest@master

  frontend:
+    name: "Фронтенд: типы, юниты, мутанты, синхрон бандла"
    needs: changes
    if: needs.changes.outputs.frontend == 'true'
    runs-on: ubuntu-latest
    steps:
+      # Полная история без блобов (#342): гейт «новый код не добавляет any»
+      # diff-aware, ему нужен диапазон, а содержимое старых ревизий — нет.
      - uses: actions/checkout@v7
+        with: { fetch-depth: 0, filter: 'blob:none' }
      - uses: actions/setup-node@v7
        with:
          node-version: 22
@@ -269,15 +331,69 @@ jobs:
      - run: npm ci
      - name: Typecheck
        run: npm run typecheck
+      # Долг типизации снимается при извлечении подсистем (#34), а не разовой
+      # заменой: в src/** его 1034 вхождения в 49 файлах. Гейт держит приращение
+      # на нуле — судит только добавленные строки (#342).
+      - name: "Новый код не добавляет any"
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          BEFORE_SHA: ${{ github.event.before }}
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.sha }}
+          REF: ${{ github.ref }}
+        run: |
+          set -euo pipefail
+          git fetch -q origin dev
+          zero=$(printf '%040d' 0)
+          base="$BEFORE_SHA"
+          if [ "$EVENT_NAME" = "pull_request" ]; then base="$BASE_SHA"; fi
+          # Пуш прямо в dev: диапазон — то, что этот пуш добавил. Новая ветка или
+          # перезаписанная история: точки отсчёта нет, берём merge-base с dev.
+          if [ "$REF" != "refs/heads/dev" ] || [ -z "$base" ] || [ "$base" = "$zero" ] \
+             || ! git cat-file -e "$base" 2>/dev/null; then
+            base=$(git merge-base origin/dev "$HEAD_SHA" || echo "")
+          fi
+          if [ -z "$base" ]; then
+            echo "не нашёл базу диапазона — гейт пропущен, это увидит следующий пуш"
+            exit 0
+          fi
+          node scripts/no-new-any.mjs --base "$base" --head "$HEAD_SHA"
      - name: Unit tests
        run: npm test
      - name: Build
        run: npm run build
-      # Копия стенда больше не коммитится (#255): сверяются две обязательные.
-      - name: Card bundle snapshots in sync
-        run: cmp dist/houseplan-card.js custom_components/houseplan/frontend/houseplan-card.js
+      # Entry, manifest and every content-hashed chunk are one artifact (#337).
+      - name: Card bundle trees in sync
+        run: |
+          node scripts/bundle-tree.mjs dist custom_components/houseplan/frontend
+          npm run bundle:budget
+      # Бандл собирается один раз и уезжает артефактом (#336). Прежде каждая из
+      # пяти браузерных job собирала его заново: `bundle:sync` — это `tsc
+      # --noEmit` плюс rollup, около минуты на job.
+      #
+      # Подмену артефакта ловить не нужно отдельной проверкой: `assertFreshDemoBundle`
+      # сверяет вшитый в бандл отпечаток с `sourceFingerprint` выкачанного
+      # дерева, и каждая браузерная job делает это перед первым кадром.
+      - name: Выложить бандл для браузерных job
+        uses: actions/upload-artifact@v7
+        with:
+          name: card-bundle
+          path: dist/
+          retention-days: 1
+          if-no-files-found: error
+      # Несколько браузерных контрактов импортируют чистые функции из
+      # скомпилированного тестового дерева. Оно создаётся `npm test`, но не
+      # входит в production-бандл и потому едет отдельным артефактом (#336).
+      - name: Выложить тестовые модули для смоков
+        uses: actions/upload-artifact@v7
+        with:
+          name: card-test-build
+          path: test-build/
+          retention-days: 1
+          if-no-files-found: error

  smoke:
+    name: Смоки в браузере (шард ${{ matrix.shard }} из 3)
    # Gated on `frontend` so a typecheck failure does not burn browser minutes.
    needs: [frontend, reuse]
    if: needs.reuse.outputs.smoke != 'true'
@@ -310,8 +426,21 @@ jobs:
      - name: Install pinned Chromium
        if: steps.pw.outputs.cache-hit != 'true'
        run: npx playwright install chromium
-      - name: Build a fresh bundle for the smokes
-        run: npm run bundle:sync
+      # Бандл приходит артефактом из job `frontend` (#336): та же сборка, но
+      # один раз на прогон. Свежесть проверяет сам продукт — `assertFreshDemoBundle`
+      # сверяет вшитый отпечаток с исходниками этого дерева.
+      - name: Забрать собранный бандл
+        uses: actions/download-artifact@v7
+        with:
+          name: card-bundle
+          path: dist
+      - name: Забрать тестовые модули
+        uses: actions/download-artifact@v7
+        with:
+          name: card-test-build
+          path: test-build
+      - name: Разложить бандл по копиям
+        run: node scripts/bundle-sync.mjs
      - name: Smoke suite (шард ${{ matrix.shard }} из 3)
        env:
          SHARD: ${{ matrix.shard }}
@@ -350,6 +479,7 @@ jobs:
  # Маркер переиспользования пишется ОДИН раз и только когда прошли все шарды:
  # частично прогнанная матрица не имеет права выглядеть как выполненная работа.
  smoke_done:
+    name: "Смоки: все шарды зелёные"
    needs: [smoke, reuse]
    if: needs.reuse.outputs.smoke != 'true'
    runs-on: ubuntu-latest
@@ -370,6 +500,7 @@ jobs:
          key: reuse-smoke-${{ needs.reuse.outputs.smoke_key }}

  golden:
+    name: Golden-кадры против принятых эталонов
    # Deterministic visual correctness stays in every prerelease gate: it is
    # inexpensive and catches a different class of regressions than timings.
    needs: [frontend, reuse]
@@ -396,8 +527,16 @@ jobs:
      - name: Install pinned Chromium
        if: steps.pw.outputs.cache-hit != 'true'
        run: npx playwright install chromium
-      - name: Build the exact source under review
-        run: npm run bundle:sync
+      # Бандл приходит артефактом из job `frontend` (#336): та же сборка, но
+      # один раз на прогон. Свежесть проверяет сам продукт — `assertFreshDemoBundle`
+      # сверяет вшитый отпечаток с исходниками этого дерева.
+      - name: Забрать собранный бандл
+        uses: actions/download-artifact@v7
+        with:
+          name: card-bundle
+          path: dist
+      - name: Разложить бандл по копиям
+        run: node scripts/bundle-sync.mjs
      - name: Capture or verify golden matrix
        id: golden
        run: |
@@ -432,6 +571,7 @@ jobs:
          key: reuse-golden-${{ needs.reuse.outputs.golden_key }}

  performance_smoke:
+    name: "Перф-смок: бюджет времени кадра"
    # Candidate-only catastrophic-regression guard for ordinary pushes and
    # prereleases. The expensive same-runner comparison lives in performance.yml.
    needs: [frontend, reuse]
@@ -462,14 +602,26 @@ jobs:
      - name: Install pinned Chromium
        if: steps.pw.outputs.cache-hit != 'true'
        run: npx playwright install chromium
-      - name: Build the exact candidate source
-        run: npm run bundle:sync
+      # Бандл приходит артефактом из job `frontend` (#336): та же сборка, но
+      # один раз на прогон. Свежесть проверяет сам продукт — `assertFreshDemoBundle`
+      # сверяет вшитый отпечаток с исходниками этого дерева.
+      - name: Забрать собранный бандл
+        uses: actions/download-artifact@v7
+        with:
+          name: card-bundle
+          path: dist
+      - name: Разложить бандл по копиям
+        run: node scripts/bundle-sync.mjs
      - name: Capture the heaviest Glow state
        run: |
          npm run benchmark:glow -- --profile=large-house-glow-overlay-v1 --variants=60 --samples=3 --warmups=1 --output=artifacts/performance-smoke/candidate.json
      - name: Enforce absolute smoke ceilings
        run: |
          npm run benchmark:compare -- --absolute-only --budgets=demo/performance/budgets-glow-smoke.json --candidate=artifacts/performance-smoke/candidate.json --output=artifacts/performance-smoke/comparison.json
+      # #330 AC7: перф-контракт ограничений стыков — быстрый (без браузера),
+      # ловит возврат квадратичных путей в оба зеркала прямо на пуше.
+      - name: Бюджеты ограничений стыков (#330)
+        run: npm run benchmark:junction-limits
      - name: Upload performance smoke report
        if: always()
        uses: actions/upload-artifact@v7
@@ -494,6 +646,7 @@ jobs:
          key: reuse-performance_smoke-${{ needs.reuse.outputs.performance_smoke_key }}

  backend:
+    name: "Бэкенд: pytest в Home Assistant"
    needs: [changes, reuse]
    if: needs.changes.outputs.backend == 'true' && needs.reuse.outputs.backend != 'true'
    runs-on: ubuntu-latest
@@ -12,3 +12,5 @@ artifacts/
 # она только росла — 364 версии по 1.16 МБ за семь недель (#255). Обязательных
 # копий две: `dist/` (артефакт сборки) и `custom_components/` (её ставит HACS).
 demo/srv/assets/houseplan-card.js
+demo/srv/assets/houseplan-assets.json
+demo/srv/assets/houseplan-assets/
@@ -2,7 +2,8 @@

 House Plan is one HACS package with two parts plus a demo harness:

- **Lovelace card** (`src/`, TypeScript + Lit) — the primary product, bundled to `dist/houseplan-card.js`.
+- **Lovelace card** (`src/`, TypeScript + Lit) — the primary product, bundled to
+  the entry, manifest and hashed chunks under `dist/`.
 - **Storage integration** (`custom_components/houseplan/`, Python) — the Home Assistant backend.
 - **Demo harness** (`demo/`) — a self-contained Playwright page (`demo/srv/demo.html`) that renders the card against a fake `hass`, used for screenshots and the `smoke_*.mjs` end-to-end suite.

@@ -40,10 +41,16 @@ task records: problem, scope, acceptance criteria and discussion.
 of a status and `rejected` on a closed issue. Exactly one `S*` label per open
 issue. Labels are the whole of it: GitHub Projects is no longer used.

-Two shortcuts exist for small work. `small` — the light track: the spec lives in
-the issue body and its review is a comment. `trivial` — the short track: no spec
-stage at all, `S2-analysis` straight to `S5-ready`, with the AC written into the
-issue body first. `trivial` requires a bug confined to one surface with no new UX
+**The light track is the default, not a shortcut** (owner's decision 2026-08-27,
+issue #338). `small` — the spec lives in the issue body and its review is a
+comment. Analysis names the `small` criterion the task *fails* when it takes the
+full track; "ordinary track" without a named criterion is not a justification.
+The threshold itself did not move — only which side carries the proof. The full
+track stays what it was for geometry, config migrations and public contracts,
+where a criterion is broken plainly and saying which one is easy.
+
+`trivial` — the short track: no spec stage at all, `S2-analysis` straight to
+`S5-ready`, with the AC written into the issue body first. `trivial` requires a bug confined to one surface with no new UX
 contract, no migration, no i18n, no perf or touch impact, at most three checkable
 AC, **and expected behaviour already on record** — nothing left to decide. Code
 review is never skipped on either track; it is what stands in for testing.
@@ -87,7 +94,7 @@ Start with the spec?" is the correct answer, not a smaller patch.
 | **A — product** | `src/**`, `custom_components/houseplan/**/*.py`, `manifest.json`, `hacs.json`, i18n, `custom_components/**/translations/**` | yes |
 | **B — gates and tooling** | `test/**`, `tests_backend/**`, `demo/**`, `scripts/**`, `.github/workflows/**`, `rollup.config.mjs`, `tsconfig*.json` | yes; may reuse the issue it covers |
 | **C — documentation** | `docs/**`, `README*`, `CHANGELOG*`, `AGENTS.md` | not if it is part of its issue's DoD |
-| **D — generated** | `dist/**`, `custom_components/houseplan/frontend/**`, `demo/golden/baselines/**` | never changes on its own. The stand copy `demo/srv/assets/houseplan-card.js` is no longer committed (#255): build it with `npm run bundle:sync` |
+| **D — generated** | `dist/**`, `custom_components/houseplan/frontend/**`, `demo/golden/baselines/**` | never changes on its own. The stand copy `demo/srv/assets/**` is no longer committed (#255): build the complete tree with `npm run bundle:sync` |

 The table above is a summary; `PROCESS.md` §1 is the authority and now covers the
 configuration files this one omits — `package.json`, `package-lock.json`,
@@ -274,7 +281,9 @@ the owner splits the task, rejects it, or arbitrates.

 On the light track (`small`: complexity ≤3, one surface, no config migration, no
 new UX contract, no perf or touch impact — all at once) the spec lives in the issue
-body and the spec review is a comment. Code review is never skipped.
+body and the spec review is a comment. Code review is never skipped. This track is
+the default: taking the full one means naming the criterion above that the task
+does not meet.

 ## Specs

@@ -317,12 +326,12 @@ npm run inventory        # the only correct way to get test counts

 Never copy test counts into documents by hand; they go stale in days.

-After building, keep all three bundle snapshots in sync — CI compares them
-byte-for-byte:
+After building, keep the complete manifest-driven bundle trees in sync — CI
+verifies every listed file byte-for-byte:

 ```
-cp dist/houseplan-card.js custom_components/houseplan/frontend/houseplan-card.js
 npm run bundle:sync   # dist → custom_components + demo/srv/assets (#255)
+npm run bundle:budget # initial View graph <= 256000 B gzip (#337)
 ```

 During the implementation cycle the fast gates always run. Since 2026-08-14 the
@@ -9,6 +9,44 @@ User-visible changes go into **both** changelogs in the same commit:
 `docs/CHANGELOG.md` (English) and `docs/CHANGELOG.ru.md` (Russian). Entries
 older than v1.42.0 exist only in the English file — no need to backfill them.

+## Translations
+
+A shipped UI language has three matching parts:
+
+1. `src/i18n/<code>.json` for the card;
+2. `custom_components/houseplan/translations/<code>.json` for the Home Assistant
+   integration;
+3. one registry entry (code, native label and eager dictionary or lazy loader)
+   in `src/i18n/registry.ts`.
+
+Use the canonical Home Assistant/BCP 47 language tag as `<code>` (for example,
+`fr` or `pt-BR`) and use that exact spelling for both JSON filenames. Lookup is
+case-insensitive and also accepts `_` from legacy locale sources.
+
+The registry drives language resolution, the visual-editor selector and parity
+tests. The tests reject missing or extra locale files; frontend dictionaries
+also fail on mismatched keys, empty values and changed placeholders.
+Placeholders such as `{name}` and `{n}` are a contract: do not translate, add
+or remove them.
+
+English and Russian are synchronous fallback/legacy locales. German is the
+reference lazy third-locale implementation: its module carries the same build
+fingerprint as the entry bundle, has one content-hashed retry URL and is listed
+under `lazyLocaleFiles` in `houseplan-assets.json`. New sizeable locales should
+follow that path unless a measured initial-bundle budget explicitly justifies
+an eager import. Extend the runtime, manifest, file/key/placeholder parity and
+regional-locale tests together; never bypass the registry by importing a locale
+directly in a component.
+
+The current `subst()` helper does not implement plural rules. Phrase strings so
+their grammar does not depend on the numeric value (for example, use a neutral
+label followed by `{n}` rather than an English singular/plural pair).
+
+Adding a UI locale does not automatically create another full documentation
+set; maintain the existing English and Russian documentation according to the
+project's normal rules. Right-to-left layout is a separate product project,
+because the plan canvas and editors cannot be mirrored by translations alone.
+
 ## Where to ask

 Not sure whether something is a bug, or just want to discuss an idea before
@@ -28,7 +66,7 @@ issue, but they do not replace it or maintain a separate checklist.
 ## Five-minute setup

 ```bash
-git clone https://github.com/Matysh/houseplan-card && cd houseplan-card
+git clone --filter=blob:none https://github.com/Matysh/houseplan-card && cd houseplan-card
 npm ci                    # frontend toolchain
 npm run typecheck         # tsc --noEmit (strict)
 npm test                  # node:test — pure logic, i18n parity, tap-action security
@@ -37,6 +75,24 @@ pip install pytest voluptuous && python -m pytest tests_backend -q   # pure back
 npm install                # also installs .githooks through the prepare script
 ```

+### Why `--filter=blob:none` (#345)
+
+A full clone is **215 MB of `.git`**; a blobless one is **26 MB** — measured, not
+estimated. Both carry all 1611 commits and all 182 tags, so ranges, `merge-base`
+and `git diff` across history work identically; `git diff origin/dev~3..origin/dev`
+in a blobless clone takes about a second and grows `.git` by one megabyte.
+
+The difference is that historical *file contents* are fetched only if something
+actually asks for them. That matters here because 32% of the pack is documentation
+screenshots — ten PNGs re-captured 196 times — and another sizeable share is the
+committed bundle, one 1.16 MB file per product change. Almost nobody ever reads an
+old revision of either.
+
+Drop the flag if you work offline with history, or need `git log -p` over the whole
+tree repeatedly. Do **not** replace it with `--depth=1`: a shallow clone is about
+the same size but has no `merge-base`, so the process gate, `smoke-select` and
+every `origin/dev..HEAD` range stop working.
+
 The HA-harness backend tests (`tests_backend/test_ha_*.py`) need Python ≥3.13 and
 `pytest-homeassistant-custom-component home-assistant-frontend`; CI runs them on
 every push — locally they are skipped when `homeassistant` is not importable.
@@ -45,8 +101,8 @@ every push — locally they are skipped when `homeassistant` is not importable.

 - **Docs in the same commit**: CHANGELOG entry for user-visible changes;
  `docs/STATUS.md` for state changes; `docs/DEVELOPMENT.md` for new gotchas.
- Every UI string goes through `src/i18n/<lang>.json` (tests enforce en/ru key parity).
-  Adding a language = adding one JSON file + registering it in `src/i18n.ts`.
+- Every UI string goes through `src/i18n/<lang>.json`; follow the
+  [Translations](#translations) flow for registry and backend parity.
 - The built card must be committed in sync: `cp dist/houseplan-card.js
  custom_components/houseplan/frontend/` (CI compares them byte-for-byte).
 - Tap actions have a security model (locks/alarms never toggle from the plan) —
@@ -101,7 +101,9 @@ S1-new → S2-analysis → S3-spec → S4-spec-review ⟲ → S5-ready →
  5. приоритет **P1/P2/P3**;
  6. тип: баг / фича / техдолг;
  7. затронутые поверхности (модули, диалоги, бэкенд, i18n);
-  8. трек: обычный / `small` / `trivial` по критериям §5 и §5.1.
+  8. трек — **по умолчанию `small`** (§5). Если задача идёт полным треком,
+     называется критерий §5, который она не проходит: «обычный трек» без
+     названного критерия обоснованием не является.
 - **Оценки и приоритет ставятся метками сразу, согласие не запрашивается.**
  Комментарий аналитики — уведомление, а не запрос: **молчание владельца —
  согласие**, несогласие он выражает правкой меток или комментарием, и это не
@@ -194,6 +196,12 @@ S1-new → S2-analysis → S3-spec → S4-spec-review ⟲ → S5-ready →
 - **High блокируют.** Medium **в скоупе задачи** чинится в текущем issue:
  без High это жёлтый вердикт и возврат автору, фикс проходит повторный цикл.
  Medium **вне скоупа** — отдельный issue (#202).
+- **Вердикт привязан к SHA (#312).** Все числа и факты отчёта сверяются с
+  `git rev-parse HEAD` непосредственно перед подведением итогов, а не с SHA,
+  зафиксированным в начале разбора: во время ревью в ветку может прилететь
+  fix-up. Серверный стопор — шаг слияния конвейера сверяет вершину ветки с
+  SHA материала ревью (допустим только собственный doc-коммит публикации
+  поверх) и при расхождении отменяет слияние с возвратом в `S6-in-progress`.
 - **Выход:** очередь на пре-релиз либо возврат в «В разработке», не более
  4 циклов (§4). Второй и последующие циклы разбираются по дельте (§2.10).

@@ -281,7 +289,9 @@ S1-new → S2-analysis → S3-spec → S4-spec-review ⟲ → S5-ready →
   правка. Блокирующая находка отправляет текущий issue в «Заблокировано».
 10. **Каждый коммит класса A и B несёт трейлер `Issue: #NN`**, ветка называется
    `issue/NN-slug`, а `User-Visible: yes` требует правок в **обоих** changelog в
-    том же коммите.
+    том же коммите. После `cherry-pick -x` служебная строка `(cherry picked
+    from ...)` должна оставаться выше финального блока трейлеров: перед push
+    проверяем порядок через `git show -s --format=full HEAD`.
 11. **Документация — в том же коммите, что поведение.** Отдельным «допишу потом»
    коммитом документация не бывает.
 12. **Сгенерированное не коммитится само по себе.** Только релизный промоушен или
@@ -340,9 +350,26 @@ S1-new → S2-analysis → S3-spec → S4-spec-review ⟲ → S5-ready →

 ---

-## 5. Лёгкий трек (метка `small`)
+## 5. Лёгкий трек (метка `small`) — путь по умолчанию

-**Критерии — все одновременно:**
+Умолчание изменено решением владельца 2026-08-27, issue #338. Прежде полный трек
+был бесплатен, а выбор лёгкого требовал обоснования. Фактическая цена: **2.9
+ревью-документа на задачу** в среднем и до шести на одну issue (#329, #316,
+#290) — при том что Medium-находки всё равно чинятся в той же задаче, без
+отдельного цикла.
+
+**Порог не изменился.** Критерии ниже те же и по-прежнему обязательны все
+одновременно. Изменилась сторона доказательства: теперь обосновывается не выбор
+лёгкого трека, а отказ от него — в `S2-analysis` называется критерий, который
+задача не проходит. Полный трек остаётся тем, чем был, для геометрии, миграций
+конфига и публичных контрактов: там критерии нарушаются сами, и назвать
+нарушенный несложно.
+
+Инверсия умолчания не отменяет ничего из §5 ниже и ничего из §4: бюджет четырёх
+циклов, арбитраж владельца, обязательность ТЗ на полном треке и правило «ревью
+до мержа» остаются как были. Меняется только стоимость пути по умолчанию.
+
+**Критерии — все одновременно; нарушенный называется явно:**

 - сложность и риск ≤ 3;
 - одна поверхность (один диалог, один модуль, один эндпоинт);
@@ -540,12 +567,23 @@ npm run build && cmp dist/houseplan-card.js custom_components/houseplan/frontend
              # копия стенда собирается `npm run bundle:sync`, в репозитории её нет (#255)
 node scripts/smoke-select.mjs --base origin/dev --head HEAD   # какие смоки относятся к диффу
 node demo/smoke_<целевые>.mjs
+node scripts/no-new-any.mjs --base origin/dev --head HEAD     # новый код не добавляет any
 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     # py3.13, если менялся бэкенд
 ```

+**Новый код не добавляет `any`** (#342). В `src/**` уже 1034 вхождения явного
+`any` в 49 файлах; перетипизировать это одним заходом — месяц риска ради нуля
+пользовательской ценности, поэтому долг снимается при плановом извлечении
+подсистем (#34), а не разовой заменой. Гейт `scripts/no-new-any.mjs` судит
+**только добавленные строки**: существующий долг на нетронутой строке законен,
+правка строки со старым `any` — новая ответственность. Исключение объявляется на
+той же строке, `// any-ok: <конкретная причина>`; голый маркер и причины вида
+«todo» не проходят. Текст разбирается парсером TypeScript, поэтому слово «any» в
+комментарии, строке или идентификаторе ложных срабатываний не даёт.
+
 **Объём гейтов на код-ревью соразмерен задаче** (issue #127). Всегда:
 `typecheck`, `npm test`, `npm run build` со сверкой трёх копий бандла, а при
 любом diff'е по `src/**` — ещё и `node scripts/check-docs.mjs`. По
@@ -1,6 +1,6 @@
 # 🏠 House Plan — a live home map for Home Assistant

-[![HACS Custom](https://img.shields.io/badge/HACS-Custom-41BDF5.svg)](https://github.com/hacs/integration)
+[![HACS Default](https://img.shields.io/badge/HACS-Default-41BDF5.svg)](https://github.com/hacs/integration)
 [![GitHub release](https://img.shields.io/github/v/release/Matysh/houseplan-card)](https://github.com/Matysh/houseplan-card/releases)
 [![CI](https://github.com/Matysh/houseplan-card/actions/workflows/validate.yml/badge.svg)](https://github.com/Matysh/houseplan-card/actions)
 [![Live demo](https://img.shields.io/badge/demo-try_it_live-00c853?logo=homeassistant&logoColor=white)](https://demo.houseplan.tech)
@@ -88,10 +88,11 @@ The [Background editor contract](docs/DECOR-EDITOR.md) and

 [![Open the repository in HACS](https://my.home-assistant.io/badges/hacs_repository.svg)](https://my.home-assistant.io/redirect/hacs_repository/?owner=Matysh&repository=houseplan-card&category=integration)

-1. In HACS open **⋮ → Custom repositories**.
-2. Add `https://github.com/Matysh/houseplan-card` as an **Integration**.
-3. Install House Plan and restart Home Assistant.
-4. Open **Settings → Devices & services → Add integration → House Plan**.
+House Plan is in the HACS default catalog — no custom repository needed.
+
+1. In HACS search for **House Plan** and install it.
+2. Restart Home Assistant.
+3. Open **Settings → Devices & services → Add integration → House Plan**.

 The card is registered automatically. If you manage Lovelace resources
 manually, use the URL served by the integration:
@@ -107,8 +108,10 @@ serve that path as a JavaScript module.

 ### Manual installation

-Copy `custom_components/houseplan` to `config/custom_components`, restart Home
-Assistant, and add the House Plan integration.
+Copy the complete `custom_components/houseplan` release folder to
+`config/custom_components`, restart Home Assistant, and add the House Plan
+integration. Do not copy only `houseplan-card.js`: the card also uses an
+internal manifest and content-hashed modules from the same release.

 ### Add the card

@@ -1,6 +1,6 @@
 # 🏠 House Plan — живой план дома для Home Assistant

-[![HACS Custom](https://img.shields.io/badge/HACS-Custom-41BDF5.svg)](https://github.com/hacs/integration)
+[![HACS Default](https://img.shields.io/badge/HACS-Default-41BDF5.svg)](https://github.com/hacs/integration)
 [![GitHub release](https://img.shields.io/github/v/release/Matysh/houseplan-card)](https://github.com/Matysh/houseplan-card/releases)
 [![CI](https://github.com/Matysh/houseplan-card/actions/workflows/validate.yml/badge.svg)](https://github.com/Matysh/houseplan-card/actions)
 [![Live demo](https://img.shields.io/badge/демо-попробовать-00c853?logo=homeassistant&logoColor=white)](https://demo.houseplan.tech)
@@ -91,10 +91,12 @@ Assistant — и устройства появятся на плане авто

 [![Открыть репозиторий в HACS](https://my.home-assistant.io/badges/hacs_repository.svg)](https://my.home-assistant.io/redirect/hacs_repository/?owner=Matysh&repository=houseplan-card&category=integration)

-1. В HACS откройте **⋮ → Пользовательские репозитории**.
-2. Добавьте `https://github.com/Matysh/houseplan-card` с типом **Интеграция**.
-3. Установите House Plan и перезапустите Home Assistant.
-4. Откройте **Настройки → Устройства и службы → Добавить интеграцию → House Plan**.
+House Plan входит в основной каталог HACS — пользовательский репозиторий
+добавлять не нужно.
+
+1. Найдите **House Plan** в поиске HACS и установите.
+2. Перезапустите Home Assistant.
+3. Откройте **Настройки → Устройства и службы → Добавить интеграцию → House Plan**.

 Карточка регистрируется автоматически. Если ресурсы Lovelace управляются вручную,
 добавьте именно URL, который публикует интеграция:
@@ -110,8 +112,10 @@ resources:

 ### Вручную

-Скопируйте `custom_components/houseplan` в `config/custom_components`,
-перезапустите Home Assistant и добавьте интеграцию House Plan.
+Скопируйте всю папку `custom_components/houseplan` из релиза в
+`config/custom_components`, перезапустите Home Assistant и добавьте интеграцию
+House Plan. Одного `houseplan-card.js` недостаточно: карточке также нужны
+внутренний манифест и хешированные модули из того же релиза.

 ### Добавление карточки

@@ -39,10 +39,12 @@ async def async_setup(hass: HomeAssistant, config) -> bool:
    hass.data.setdefault(DOMAIN, {})
    hp_ws.async_register(hass)
    from .http_api import HouseplanContentView, HouseplanImportPreviewView, HouseplanUploadView
+    from .frontend_assets import HouseplanFrontendAssetView

    hass.http.register_view(HouseplanUploadView())
    hass.http.register_view(HouseplanContentView())
    hass.http.register_view(HouseplanImportPreviewView())
+    hass.http.register_view(HouseplanFrontendAssetView())
    return True


@@ -98,7 +100,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: HouseplanConfigEntry) ->
                static_paths.append(StaticPathConfig(FRONTEND_URL, str(card_path), cache_headers=False))
            # NOTE (audit B1): plans and marker files are NO LONGER static.
            # They are served by HouseplanContentView, which requires auth.
-            # Only the card bundle stays public — Lovelace resources must be.
+            # Only the entry and manifest-gated JS chunks stay public —
+            # Lovelace modules must be loadable without an auth header.
            if static_paths:
                await hass.http.async_register_static_paths(static_paths)
        except ImportError:  # very old HA versions
@@ -236,12 +239,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: HouseplanConfigEntry) ->
        hass.bus.async_fire("houseplan_config_updated", {"rev": optimize_revs[0]})
        hass.bus.async_fire("houseplan_layout_updated", {"rev": optimize_revs[1]})
        if recovered_import:
-            await recorder.async_refresh()
            current = (await data.config_store.async_load() or {}).get("config") or {}
-            live_ids = {str(marker.get("id")) for marker in current.get("markers") or []}
-            for marker_id in list(recorder.book.data):
-                if marker_id not in live_ids:
-                    await recorder.async_delete(marker_id)
+            await recorder.async_purge_orphans(current)
+            await recorder.async_refresh()

    await async_check_plan_files(hass, entry)

@@ -7,6 +7,7 @@ STORAGE_VIRTUAL_LIGHTS_KEY = f"{DOMAIN}.virtual_lights"
 STORAGE_VERSION = 1
 STORAGE_MINOR_VERSION = 2
 FRONTEND_URL = "/houseplan_files/houseplan-card.js"
+FRONTEND_ASSETS_URL = "/houseplan_files/houseplan-assets"
 PLANS_URL = "/houseplan_files/plans"
 PLANS_DIR = "houseplan/plans"  # relative to the HA configuration directory
 FILES_URL = "/houseplan_files/files"
@@ -46,12 +47,12 @@ PLAN_ORPHAN_TTL_S = 3600
 SCHEDULED_GRACE_S = 30 * 24 * 3600
 FILES_DIR = "houseplan/files"
 CONF_ADMIN_ONLY = "admin_only"
-VERSION = "1.67.0-rc.3"
+VERSION = "1.69.0-beta.1"

 # Portable backup format.  This is deliberately independent from the Home
 # Assistant Store version above: storage migrations and files exported by a
 # user have different compatibility lifecycles.
-PLAN_MODEL_VERSION = 7
+PLAN_MODEL_VERSION = 9
 EXPORT_VERSION = 1
 MAX_EXPORT_BYTES = 8 * 1024 * 1024
 IMPORT_PREVIEW_TTL_S = 10 * 60
@@ -136,6 +136,10 @@ def canonicalize_config_geometry(config: Any) -> Any:
            _lattice_point(wall.get("a"))
            _lattice_point(wall.get("b"))

+        for segment in _records(space.get("wall_segments")):
+            _lattice_point(segment.get("a"))
+            _lattice_point(segment.get("b"))
+
        for opening in _records(space.get("openings")):
            _lattice_fields(opening, ("x", "y"))
            _scalar_fields(opening, ("angle", "length"))
@@ -0,0 +1,113 @@
+{
+  "schema": 1,
+  "fingerprint": "0c61742c98d55aec077478fcee7b8acf52e2ac1b70e2ed23532483b845ca884f",
+  "entry": "houseplan-card.js",
+  "initialViewFiles": [
+    "houseplan-assets/houseplan-card-BU843YpJ.js",
+    "houseplan-card.js"
+  ],
+  "initialViewGzipBytes": 256091,
+  "lazyFiles": [
+    "houseplan-assets/de-SftP4Auy.js",
+    "houseplan-assets/editor-DuOmG3Hn.js",
+    "houseplan-assets/houseplan-editor-runtime-pSbu_R5t.js",
+    "houseplan-assets/houseplan-onboarding-runtime-DXJhYLas.js",
+    "houseplan-assets/space-deletion-DIa5HjfJ.js"
+  ],
+  "lazyGzipBytes": 160351,
+  "lazyEditorFiles": [
+    "houseplan-assets/editor-DuOmG3Hn.js",
+    "houseplan-assets/houseplan-editor-runtime-pSbu_R5t.js",
+    "houseplan-assets/space-deletion-DIa5HjfJ.js"
+  ],
+  "lazyEditorGzipBytes": 131833,
+  "lazyOnboardingFiles": [
+    "houseplan-assets/houseplan-onboarding-runtime-DXJhYLas.js",
+    "houseplan-assets/space-deletion-DIa5HjfJ.js"
+  ],
+  "lazyOnboardingGzipBytes": 7198,
+  "lazyLocaleFiles": [
+    "houseplan-assets/de-SftP4Auy.js"
+  ],
+  "lazyLocaleGzipBytes": 21873,
+  "files": [
+    {
+      "path": "houseplan-assets/de-SftP4Auy.js",
+      "sha256": "3bee20ff5a52b6c6726cf857545bc3e1061a1249a515df5660491fd662218c94",
+      "rawBytes": 71477,
+      "gzipBytes": 21873,
+      "isEntry": false,
+      "imports": [],
+      "dynamicImports": []
+    },
+    {
+      "path": "houseplan-assets/editor-DuOmG3Hn.js",
+      "sha256": "d90a38e511769dc68d69081375ffb5067b196d429ab59fc4de06068baeafcac8",
+      "rawBytes": 3831,
+      "gzipBytes": 1584,
+      "isEntry": false,
+      "imports": [
+        "houseplan-assets/houseplan-card-BU843YpJ.js"
+      ],
+      "dynamicImports": []
+    },
+    {
+      "path": "houseplan-assets/houseplan-card-BU843YpJ.js",
+      "sha256": "1937126237e02356adad8b8c34b4adb29892bc183d6bcaa17e2542404907c811",
+      "rawBytes": 910424,
+      "gzipBytes": 255907,
+      "isEntry": false,
+      "imports": [],
+      "dynamicImports": [
+        "houseplan-assets/de-SftP4Auy.js",
+        "houseplan-assets/editor-DuOmG3Hn.js",
+        "houseplan-assets/houseplan-editor-runtime-pSbu_R5t.js",
+        "houseplan-assets/houseplan-onboarding-runtime-DXJhYLas.js"
+      ]
+    },
+    {
+      "path": "houseplan-assets/houseplan-editor-runtime-pSbu_R5t.js",
+      "sha256": "51fdd8f9766569a3b1af3b04d91dea81e6b555d9784bf5be53c6f82a42fbe51e",
+      "rawBytes": 504959,
+      "gzipBytes": 129696,
+      "isEntry": false,
+      "imports": [
+        "houseplan-assets/houseplan-card-BU843YpJ.js",
+        "houseplan-assets/space-deletion-DIa5HjfJ.js"
+      ],
+      "dynamicImports": []
+    },
+    {
+      "path": "houseplan-assets/houseplan-onboarding-runtime-DXJhYLas.js",
+      "sha256": "19299e14098c6e413ca410d7b2c3715d57c945fdb690991f92fa2dc769d9c84d",
+      "rawBytes": 26356,
+      "gzipBytes": 6645,
+      "isEntry": false,
+      "imports": [
+        "houseplan-assets/houseplan-card-BU843YpJ.js",
+        "houseplan-assets/space-deletion-DIa5HjfJ.js"
+      ],
+      "dynamicImports": []
+    },
+    {
+      "path": "houseplan-assets/space-deletion-DIa5HjfJ.js",
+      "sha256": "93f68c225dc00086ea86ac8a97ddfdf49b99ff17a8221f3cc3796f92d5e9f3cb",
+      "rawBytes": 911,
+      "gzipBytes": 553,
+      "isEntry": false,
+      "imports": [],
+      "dynamicImports": []
+    },
+    {
+      "path": "houseplan-card.js",
+      "sha256": "823dc598d07959ff800a942ca1b705bd54b94dd4def67d66668f2a5552cc271f",
+      "rawBytes": 190,
+      "gzipBytes": 184,
+      "isEntry": true,
+      "imports": [
+        "houseplan-assets/houseplan-card-BU843YpJ.js"
+      ],
+      "dynamicImports": []
+    }
+  ]
+}
@@ -0,0 +1,14 @@
+globalThis.__HOUSEPLAN_BUILD_FINGERPRINT__="0c61742c98d55aec077478fcee7b8acf52e2ac1b70e2ed23532483b845ca884f";import{c as e,l as o,t,d2 as s,A as a,d3 as i,d4 as l,d5 as n,E as r,b as c}from"./houseplan-card-BU843YpJ.js";class h extends e{constructor(){super(...arguments),this._spaces=null,this._spacesLoading=!1,this._spacesAuthoritative=!1}setConfig(e){this._config=e}async _loadSpaces(){if(!this._spaces&&!this._spacesLoading&&this.hass){this._spacesLoading=!0;try{const e=await this.hass.callWS({type:"houseplan/config/get"});this._spaces=(e?.config?.spaces||[]).map(e=>({value:e.id,label:e.title||e.id})),this._spacesAuthoritative=!0}catch{this._spaces=[],this._spacesAuthoritative=!1}finally{this._spacesLoading=!1}}}get _lang(){return o(this.hass,this._config?.language)}get _floorToken(){const e=this._config?.floor;return"number"==typeof e?`__houseplan_yaml_floor_index__:${String(e)}`:null}get _formData(){const e={...this._config},o=this._floorToken;return o?e.floor=o:Object.prototype.hasOwnProperty.call(e,"floor")||(e.floor=""),e}get _schema(){const e=this._spaces||[],o=this._lang,a=[{value:"",label:t(o,"editor.floor_none")}],i=this._floorToken;i&&a.push({value:i,label:t(o,"editor.floor_index",{index:String(this._config?.floor)})});const l="string"==typeof this._config?.floor?this._config.floor:"";l&&!e.some(e=>e.value===l)&&a.push({value:l,label:l}),a.push(...e);const n="string"==typeof this._config?.default_floor?this._config.default_floor:"",r=[...e];return n&&!e.some(e=>e.value===n)&&r.unshift({value:n,label:n}),[{name:"title",selector:{text:{}}},{name:"floor",selector:{select:{mode:"dropdown",options:a}}},e.length?{name:"default_floor",selector:{select:{mode:"dropdown",options:r}}}:{name:"default_floor",selector:{text:{}}},{name:"language",selector:{select:{mode:"dropdown",options:s(t(o,"editor.lang_auto"),this._config?.language)}}},{name:"icon_size",selector:{number:{min:1,max:6,step:.1,mode:"box"}}},{name:"show_temperature",selector:{boolean:{}}},{name:"live_states",selector:{boolean:{}}},{name:"show_signal",selector:{boolean:{}}},{name:"kiosk",selector:{boolean:{}}},{name:"cycle",selector:{number:{min:0,max:3600,step:5,mode:"box"}}}]}render(){if(!this.hass||!this._config)return a;const e=i(this,l,o(this.hass,this._config.language));if("cold"===e)return n();if("warm"===e)return r;this._loadSpaces();const s=this._lang,h={title:t(s,"editor.title"),floor:t(s,"editor.floor"),default_floor:t(s,"editor.default_floor"),language:t(s,"editor.language"),icon_size:t(s,"editor.icon_size"),show_temperature:t(s,"editor.show_temperature"),live_states:t(s,"editor.live_states"),show_signal:t(s,"editor.show_signal"),kiosk:t(s,"editor.kiosk"),cycle:t(s,"editor.cycle")},f=this._schema,_=function(e,o,t){if(!t||null===o)return null;const s="string"==typeof e?.default_floor?e.default_floor:"";return!s||o.some(e=>e.value===s)?null:s}(this._config,this._spaces,this._spacesAuthoritative),d=e=>c`<ha-form
+        .hass=${this.hass}
+        .data=${this._formData}
+        .schema=${e}
+        .computeLabel=${e=>h[e.name]||e.name}
+        @value-changed=${this._valueChanged}
+      ></ha-form>`;return c`
+      ${d(f.slice(0,3))}
+      ${_?c`<div class="default-floor-error" role="alert"
+        style="color:var(--error-color,#db4437);margin:-4px 0 12px;overflow-wrap:anywhere">
+        ${t(s,"editor.default_floor_missing",{id:_})}
+      </div>`:a}
+      ${d(f.slice(3))}
+    `}_valueChanged(e){const o={...this._config,...e.detail.value};""===o.floor?delete o.floor:o.floor===this._floorToken&&(o.floor=this._config?.floor);const t=new Event("config-changed",{bubbles:!0,composed:!0});t.detail={config:o},this.dispatchEvent(t)}}h.properties={hass:{attribute:!1},_config:{state:!0},_spaces:{state:!0}},customElements.get("houseplan-card-editor")||customElements.define("houseplan-card-editor",h);
@@ -0,0 +1 @@
+function e(e,o){return{id:e,title:o,plan_url:null,view_box:[0,0,1,1],rooms:[],wall_segments:[]}}function o(e="file"){const o="draw"===e;return{source:e,showBorders:o,showNames:o,displayTouched:!1}}function r(e,o){if(e.displayTouched)return{...e,source:o};const r="draw"===o;return{...e,source:o,showBorders:r,showNames:r}}function s(e,o,r){return{...e,[o]:r,displayTouched:!0}}function t(e,o,r){const s=(e?.spaces||[]).find(e=>e?.id===r),t=new Set((s?.rooms||[]).map(e=>String(e?.id||"")).filter(Boolean)),n=[...new Set((e?.markers||[]).filter(e=>!0!==e?.removed&&"string"==typeof e?.id).filter(e=>e.space===r||"string"==typeof e.room_id&&t.has(e.room_id)||o?.[e.id]?.s===r).map(e=>e.id))].sort((e,o)=>e.localeCompare(o));return{markerIds:n,count:n.length}}globalThis.__HOUSEPLAN_BUILD_FINGERPRINT__="0c61742c98d55aec077478fcee7b8acf52e2ac1b70e2ed23532483b845ca884f";export{t as a,e as c,o as i,r as s,s as t};
@@ -0,0 +1,37 @@
+"""Pure manifest/path resolver for generated frontend assets."""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+_MANIFEST = "houseplan-assets.json"
+_ASSET_DIR = "houseplan-assets"
+
+
+def resolve_frontend_asset(frontend_root: Path, filename: object) -> Path | None:
+    """Resolve one generated JS asset only when the current manifest lists it."""
+    if not isinstance(filename, str) or not filename or filename != Path(filename).name:
+        return None
+    if "/" in filename or "\\" in filename or filename in {".", ".."}:
+        return None
+    if not filename.endswith(".js"):
+        return None
+    try:
+        manifest = json.loads((frontend_root / _MANIFEST).read_text(encoding="utf-8"))
+    except (OSError, ValueError, TypeError):
+        return None
+    if not isinstance(manifest, dict) or manifest.get("schema") != 1:
+        return None
+    expected = f"{_ASSET_DIR}/{filename}"
+    listed = {
+        item.get("path")
+        for item in manifest.get("files", [])
+        if isinstance(item, dict)
+    }
+    if expected not in listed:
+        return None
+    asset_root = (frontend_root / _ASSET_DIR).resolve()
+    candidate = (asset_root / filename).resolve()
+    if candidate.parent != asset_root or not candidate.is_file():
+        return None
+    return candidate
@@ -0,0 +1,36 @@
+"""Public, manifest-gated JavaScript chunks for the Lovelace card."""
+from __future__ import annotations
+
+from pathlib import Path
+
+from aiohttp import web
+from homeassistant.components.http import HomeAssistantView
+try:
+    from homeassistant.components.http import KEY_HASS
+except ImportError:  # pragma: no cover - old HA compatibility
+    KEY_HASS = "hass"  # type: ignore[assignment]
+
+from .const import FRONTEND_ASSETS_URL
+from .frontend_asset_manifest import resolve_frontend_asset
+
+_FRONTEND_ROOT = Path(__file__).parent / "frontend"
+
+
+class HouseplanFrontendAssetView(HomeAssistantView):
+    """Serve only generated chunks named by the current build manifest."""
+
+    url = f"{FRONTEND_ASSETS_URL}/{{filename}}"
+    name = "api:houseplan:frontend-asset"
+    requires_auth = False
+
+    async def get(self, request: web.Request, filename: str) -> web.StreamResponse:
+        hass = request.app[KEY_HASS]
+        path = await hass.async_add_executor_job(
+            resolve_frontend_asset, _FRONTEND_ROOT, filename
+        )
+        if path is None:
+            raise web.HTTPNotFound()
+        return web.FileResponse(
+            path,
+            headers={"Cache-Control": "no-cache", "X-Content-Type-Options": "nosniff"},
+        )
@@ -36,6 +36,10 @@ from .const import (
    VERSION,
 )
 from .store import HouseplanData
+from .wall_segment_model import (
+    WallSegmentMigrationError,
+    commit_wall_segment_model,
+)
 from .validation import (
    CONFIG_SCHEMA,
    LAYOUT_SCHEMA,
@@ -64,7 +68,8 @@ _LIVE_TEXT_ENTITY = re.compile(r"^[a-z0-9_]+\.[a-z0-9_]+$")
 _LIVE_TEXT_ATTRIBUTE = re.compile(r"^[a-zA-Z0-9_.-]+$")
 _PLAN_ONLY_DASH = "—"
 _IMPORT_ID_NAMESPACES = {
-    "space", "room", "marker", "partition", "opening", "decor", "draft", "column",
+    "space", "room", "marker", "partition", "wall", "opening", "decor", "draft",
+    "draft_segment", "column",
 }
 _MAX_IMPORT_LINEAGE_DEPTH = 16
 _REPORT_EXAMPLE_LIMIT = 24
@@ -72,6 +77,7 @@ _REPORT_EXAMPLE_LIMIT = 24
 _SPACE_PLAN_FIELDS = (
    "id", "title", "cell_cm", "plan_url", "plan_aspect", "plan_x", "plan_y",
    "plan_scale", "plan_scale_x", "plan_scale_y", "plan_angle", "view_box",
+    "zero_wall_style",
 )
 _SPACE_DISPLAY_FIELDS = (
    "show_borders", "show_names", "room_color", "bg_color", "room_opacity",
@@ -80,7 +86,7 @@ _SPACE_DISPLAY_FIELDS = (
    "label_lqi", "label_light", "card_font_scale", "north_deg", "bg_mode",
    "sun_rays",
 )
-_ROOM_PLAN_FIELDS = ("id", "name", "open_to", "x", "y", "w", "h", "poly")
+_ROOM_PLAN_FIELDS = ("id", "name", "open_to", "x", "y", "w", "h", "poly", "wall_ids")
 _ROOM_DISPLAY_FIELDS = (
    "fill_mode", "custom_fill", "glow", "name_scale", "label_scale",
 )
@@ -249,6 +255,7 @@ def _project_plan_only_space(space: dict[str, Any]) -> dict[str, Any]:
    ]
    collections: tuple[tuple[str, tuple[str, ...]], ...] = (
        ("walls", ("key", "cm", "a", "b")),
+        ("wall_segments", ("id", "a", "b", "cm")),
        ("room_drafts", ("id", "points", "segments")),
        ("partitions", ("id", "a", "b", "cm")),
        ("wall_columns", ("id", "shape", "center", "cm", "angle")),
@@ -262,7 +269,7 @@ def _project_plan_only_space(space: dict[str, Any]) -> dict[str, Any]:
            selected = _pick_fields(item, fields)
            if name == "room_drafts" and "segments" in selected:
                selected["segments"] = [
-                    _pick_fields(segment, ("cm",))
+                    _pick_fields(segment, ("id", "cm"))
                    for segment in selected.get("segments") or []
                ]
            values.append(selected)
@@ -584,7 +591,14 @@ def parse_document(raw: bytes) -> dict[str, Any]:
    if not isinstance(payload, dict):
        raise ImportFailure("invalid_format", "Missing payload")
    try:
-        config = CONFIG_SCHEMA(_json_copy(payload.get("config")))
+        config_candidate = _json_copy(payload.get("config"))
+        # The envelope is authoritative. Export deliberately omits this field
+        # inside payload.config, but v8 semantic validation still has to run
+        # before an import token can be issued.
+        if model > 0:
+            config_candidate["model_version"] = model
+        config = CONFIG_SCHEMA(config_candidate)
+        config.pop("model_version", None)
    except (vol.Invalid, TypeError, ValueError) as err:
        raise ImportFailure("invalid_config", str(err)) from err
    if document["kind"] == "full":
@@ -1154,7 +1168,8 @@ def build_space_merge(
        for sp in current_config.get("spaces") or []
        for collection in (
            (sp,), sp.get("rooms") or [], sp.get("room_drafts") or [],
-            sp.get("partitions") or [], sp.get("wall_columns") or [],
+            sp.get("partitions") or [], sp.get("wall_segments") or [],
+            sp.get("wall_columns") or [],
            sp.get("openings") or [], sp.get("decor") or [],
        )
        for item in collection
@@ -1164,13 +1179,19 @@ def build_space_merge(
    } | {
        str(m.get("id")) for m in current_config.get("markers") or []
        if m.get("id") is not None
+    } | {
+        str(segment.get("id"))
+        for sp in current_config.get("spaces") or []
+        for draft in sp.get("room_drafts") or []
+        for segment in draft.get("segments") or []
+        if isinstance(segment, dict) and segment.get("id") is not None
    } | {
        str(value)
        for incoming_space in spaces
        for collection in (
            (incoming_space,), incoming_space.get("rooms") or [],
            incoming_space.get("room_drafts") or [],
-            incoming_space.get("partitions") or [],
+            incoming_space.get("partitions") or [], incoming_space.get("wall_segments") or [],
            incoming_space.get("wall_columns") or [],
            incoming_space.get("openings") or [], incoming_space.get("decor") or [],
        )
@@ -1181,6 +1202,12 @@ def build_space_merge(
    } | {
        str(m.get("id")) for m in incoming.get("markers") or []
        if m.get("id") is not None
+    } | {
+        str(segment.get("id"))
+        for incoming_space in spaces
+        for draft in incoming_space.get("room_drafts") or []
+        for segment in draft.get("segments") or []
+        if isinstance(segment, dict) and segment.get("id") is not None
    }
    old_space_id = str(space.get("id"))
    _record_bounded_lineage(
@@ -1194,6 +1221,7 @@ def build_space_merge(
    id_maps["space"][old_space_id] = new_space_id
    for collection, prefix in (
        ("rooms", "room"), ("room_drafts", "draft"), ("partitions", "partition"),
+        ("wall_segments", "wall"),
        ("wall_columns", "column"), ("openings", "opening"), ("decor", "decor"),
    ):
        for item in space.get(collection) or []:
@@ -1205,6 +1233,18 @@ def build_space_merge(
                id_map[old] = _fresh(prefix, old, used)
                id_maps[prefix][old] = id_map[old]
                item["id"] = id_map[old]
+    for draft in space.get("room_drafts") or []:
+        for segment in draft.get("segments") or []:
+            if not isinstance(segment, dict) or segment.get("id") is None:
+                continue
+            old = str(segment["id"])
+            _record_bounded_lineage(
+                reference_report, bounded_seen, "draft_segment", old,
+            )
+            new = _fresh("draft_segment", old, used)
+            id_map[old] = new
+            id_maps["draft_segment"][old] = new
+            segment["id"] = new
    old_room_ids = id_maps["room"]
    for room in space.get("rooms") or []:
        if room.get("open_to"):
@@ -1219,13 +1259,18 @@ def build_space_merge(
                        str(room.get("id", "?")), old_value,
                    )
            room["open_to"] = remapped_open_to
+        if room.get("wall_ids"):
+            room["wall_ids"] = [
+                id_maps["wall"].get(str(value), str(value))
+                for value in room["wall_ids"]
+            ]
    # Opening ownership is part of the same space-local id graph. Remap the
    # nested reference together with the partition itself; otherwise the
    # invariant validator correctly rejects a copied space whose host.id still
    # names the source partition.
    for opening in space.get("openings") or []:
        host = opening.get("host") if isinstance(opening, dict) else None
-        if isinstance(host, dict) and host.get("kind") == "partition":
+        if isinstance(host, dict) and host.get("kind") in ("partition", "wall"):
            old_host_id = str(host.get("id"))
            if old_host_id in id_map:
                host["id"] = id_map[old_host_id]
@@ -1591,6 +1636,22 @@ def _materialize_import_candidate(
    imported_config = prepared["payload"]["config"]
    if confirmation_required:
        _detach_missing(imported_config, content)
+    incoming_model = int(prepared.get("model_version", 0) or 0)
+    target_model = int(current_config.get("model_version", 0) or 0)
+    requires_v8 = incoming_model >= 8 or target_model >= 8
+    if requires_v8:
+        try:
+            # A v8 target cannot be downgraded by a v7 backup, while an
+            # incoming v8 graph must retain its already-persisted IDs. When
+            # both sides are v7 the accepted compatibility contract keeps the
+            # import v7 until a later structural write or explicit Optimize.
+            imported_config["model_version"] = incoming_model
+            imported_config, _ = commit_wall_segment_model(imported_config)
+            prepared["payload"]["config"] = imported_config
+            if prepared["kind"] == "space":
+                current_config, _ = commit_wall_segment_model(current_config)
+        except WallSegmentMigrationError as err:
+            raise ImportFailure(err.code, str(err)) from err
    if prepared["kind"] == "space":
        config, layout, details = build_space_merge(
            prepared, current_config, current_layout, duplicate_policy,
@@ -1598,11 +1659,9 @@ def _materialize_import_candidate(
        )
    else:
        config = imported_config
+        if not requires_v8 and incoming_model > 0:
+            config["model_version"] = incoming_model
        _materialize_global_background(config)
-        model_version = prepared.get("model_version", 0)
-        if isinstance(model_version, int) and not isinstance(model_version, bool) \
-                and model_version > 0:
-            config["model_version"] = model_version
        layout = _json_copy(prepared["payload"]["layout"])
        if not same_source:
            settings = config.get("settings") or {}
@@ -0,0 +1,431 @@
+"""Issue #329 — wall junction limits, Python mirror of src/junction-limits.ts.
+
+The card refuses a WRITE that would ADD a junction violation; this module is
+the backend half of that contract for `config/set` and `plan/optimize` (#333)
+— the two commands a client can use to write arbitrary geometry. Import and
+backup restore are DELIBERATELY outside the gate: #329 §3 promises that a
+restore is never blocked, so a crafted import can still persist violations —
+they are then inherited, never legalised as new ones. It mirrors П1–П4 exactly, including the two legal
+incidences of П4 (a shared node and a T-joint into the middle of a foreign
+wall) and the П3 rule that measures the collinear same-thickness WALL RUN
+rather than one catalogue atom.
+
+П5 (the room keeps at least 25 cm² of interior) is deliberately NOT mirrored:
+it is a statement about the rendered wall bodies, and reproducing the mitre /
+inset pipeline in Python would be a second geometry implementation whose drift
+is a larger risk than the rule it guards. A document that violates only П5 is
+ugly, not corrupt — see docs/specs/329-junction-limits.md §5.
+"""
+
+from __future__ import annotations
+
+import math
+
+import logging
+
+from .wall_segment_model import (
+    WALL_SEGMENT_MODEL_VERSION, WallSegmentMigrationError, commit_wall_segment_model,
+)
+
+_LOGGER = logging.getLogger(__name__)
+
+MIN_JUNCTION_ANGLE_DEG = 15.0
+MAX_JUNCTION_VALENCE = 6
+MIN_SEGMENT_LENGTH_CM = 20.0
+MIN_NODE_DISTANCE_CM = 5.0
+
+GRID_STEP_N = 1 / 240
+
+_EPS = 1e-9
+# #331 §2.1: below this two points are ONE node / a node is ON the wall —
+# floating debris of pre-canonicalisation arithmetic, not a near miss.
+_INCIDENT_EPS = 2e-7
+_KEY_FACTOR = 1e7
+
+
+class JunctionLimitError(ValueError):
+    """A write introduced a wall-junction violation (#329)."""
+
+    def __init__(self, space_id: str, rule: str, subject: str,
+                 actual: float, limit: float) -> None:
+        self.space_id = space_id
+        self.rule = rule
+        self.subject = subject
+        self.actual = actual
+        self.limit = limit
+        self.code = f"junction_limit_{rule}"
+        super().__init__(
+            f"space={space_id}; rule={rule}; subject={subject}; "
+            f"actual={actual:.12g}; limit={limit:.12g}"
+        )
+
+
+def _finite_point(point: object) -> bool:
+    return (
+        isinstance(point, (list, tuple))
+        and len(point) >= 2
+        and all(isinstance(value, (int, float)) and math.isfinite(value)
+                for value in point[:2])
+    )
+
+
+def _quantize_key_coord(value: float) -> float:
+    """#331 §2.1: the canonicalisation formula — sign*floor(|v|*f+0.5)/f.
+
+    Native round() is banker's rounding and parts ways with JS Math-style
+    rounding on .5 ticks; coordinate canonicalisation already encodes this
+    parity lesson, and node keys must follow it. -0 normalises to 0.
+    """
+    rounded = math.copysign(
+        math.floor(abs(value) * _KEY_FACTOR + 0.5), value,
+    ) / _KEY_FACTOR
+    return 0.0 if rounded == 0 else rounded
+
+
+def _key(point) -> str:
+    return f"{_quantize_key_coord(point[0])},{_quantize_key_coord(point[1])}"
+
+
+def _length(a, b) -> float:
+    return math.hypot(b[0] - a[0], b[1] - a[1])
+
+
+def cm_to_units(cm: float, cell_cm: float, grid_pitch: float = GRID_STEP_N) -> float:
+    return (cm / (cell_cm or 1)) * grid_pitch
+
+
+def limit_segments(space: dict) -> list[dict]:
+    """Every wall the limits judge: contour atoms, partitions, draft segments."""
+    segments: list[dict] = []
+    for segment in space.get("wall_segments") or []:
+        if _finite_point(segment.get("a")) and _finite_point(segment.get("b")):
+            segments.append({
+                "id": str(segment.get("id") or ""),
+                "a": segment["a"], "b": segment["b"],
+                "cm": float(segment.get("cm") or 0),
+            })
+    for partition in space.get("partitions") or []:
+        if _finite_point(partition.get("a")) and _finite_point(partition.get("b")):
+            segments.append({
+                "id": str(partition.get("id") or ""),
+                "a": partition["a"], "b": partition["b"],
+                "cm": float(partition.get("cm") or 0),
+            })
+    for draft in space.get("room_drafts") or []:
+        points = draft.get("points") or []
+        drafted = draft.get("segments") or []
+        for index in range(max(len(points) - 1, 0)):
+            if not (_finite_point(points[index]) and _finite_point(points[index + 1])):
+                continue
+            piece = drafted[index] if index < len(drafted) else {}
+            segments.append({
+                "id": str((piece or {}).get("id")
+                          or f"{draft.get('id') or 'draft'}-{index}"),
+                "a": points[index], "b": points[index + 1],
+                "cm": float((piece or {}).get("cm") or 0),
+            })
+    return [segment for segment in segments
+            if _length(segment["a"], segment["b"]) > _EPS]
+
+
+def check_nodes(segments: list[dict]) -> list[tuple[str, str, float, float]]:
+    """П1 + П2: valence of a node and the narrowest wedge in it."""
+    rays: dict[str, list[float]] = {}
+    for segment in segments:
+        for start, end in ((segment["a"], segment["b"]), (segment["b"], segment["a"])):
+            rays.setdefault(_key(start), []).append(
+                math.atan2(end[1] - start[1], end[0] - start[0])
+            )
+    violations: list[tuple[str, str, float, float]] = []
+    for node, angles in rays.items():
+        if len(angles) > MAX_JUNCTION_VALENCE:
+            violations.append(
+                ("valence", node, float(len(angles)), float(MAX_JUNCTION_VALENCE))
+            )
+        if len(angles) < 2:
+            continue
+        ordered = sorted(angles)
+        smallest = math.inf
+        for index, value in enumerate(ordered):
+            delta = ordered[(index + 1) % len(ordered)] - value
+            if index == len(ordered) - 1:
+                delta += math.pi * 2
+            degrees = (delta * 180) / math.pi
+            # A ~0° pair is NOT a violation — and cannot be (#331 revision 4,
+            # learned in the field): a shared wall of two adjacent rooms is
+            # two co-located owner atoms ON ONE LINE, so every shared-wall
+            # node carries a legitimate 0° pair by construction. An exact
+            # duplicate stays a KNOWN LIMITATION of П1 at this level.
+            if _EPS < degrees < smallest:
+                smallest = degrees
+        if smallest < MIN_JUNCTION_ANGLE_DEG - 1e-9:
+            violations.append(("angle", node, smallest, MIN_JUNCTION_ANGLE_DEG))
+    return violations
+
+
+def _axis_degrees(segment: dict) -> float:
+    degrees = math.degrees(math.atan2(
+        segment["b"][1] - segment["a"][1], segment["b"][0] - segment["a"][0]
+    ))
+    return (degrees % 180 + 180) % 180
+
+
+def _collinear(left: dict, right: dict, tolerance_deg: float = 1.0) -> bool:
+    delta = abs(_axis_degrees(left) - _axis_degrees(right))
+    return min(delta, 180 - delta) <= tolerance_deg
+
+
+def _build_node_index(segments: list[dict]) -> dict[str, list[dict]]:
+    by_node: dict[str, list[dict]] = {}
+    for item in segments:
+        for point in (item["a"], item["b"]):
+            by_node.setdefault(_key(point), []).append(item)
+    return by_node
+
+
+def collinear_run_length_units(
+    segment: dict, segments: list[dict],
+    by_node_index: dict[str, list[dict]] | None = None,
+) -> float:
+    """Length of the WALL a segment belongs to, not of the atom.
+
+    #331 §2.3/§2.4: an iterative edge walk over the collinear component — no
+    recursion (a 10 000-atom chain must answer, not overflow), no
+    combinatorial DFS (every atom joins at most once, O(E)), no silently
+    dropped fork. Collinearity is measured against the BASE segment's axis,
+    so an arc of small per-atom turns cannot pose as one straight wall.
+
+    #330 §4.3: the per-check caller builds the node index once.
+    """
+    by_node = by_node_index if by_node_index is not None else _build_node_index(segments)
+    visited = {id(segment)}
+    total = _length(segment["a"], segment["b"])
+    frontier = [segment["a"], segment["b"]]
+    base_cm = float(segment.get("cm") or 0)
+    while frontier:
+        node = frontier.pop()
+        for candidate in by_node.get(_key(node), ()):
+            if id(candidate) in visited:
+                continue
+            if not _collinear(candidate, segment):
+                continue
+            if float(candidate.get("cm") or 0) != base_cm:
+                continue
+            visited.add(id(candidate))
+            total += _length(candidate["a"], candidate["b"])
+            frontier.append(candidate["a"])
+            frontier.append(candidate["b"])
+    return total
+
+def check_segment_lengths(
+    segments: list[dict], cell_cm: float, grid_pitch: float = GRID_STEP_N,
+) -> list[tuple[str, str, float, float]]:
+    """П3: a wall is at least 20 cm and never shorter than its own thickness."""
+    violations: list[tuple[str, str, float, float]] = []
+    by_node = _build_node_index(segments)
+    for segment in segments:
+        units = collinear_run_length_units(segment, segments, by_node)
+        cm = (units / grid_pitch) * (cell_cm or 1)
+        thickness = float(segment.get("cm") or 0)
+        limit = max(MIN_SEGMENT_LENGTH_CM, thickness if thickness > 0 else 0.0)
+        if cm < limit - 1e-9:
+            violations.append((
+                "length", str(segment.get("id") or _key(segment["a"])), cm, limit,
+            ))
+    return violations
+
+
+def _distance_to_segment(point, a, b) -> float:
+    dx, dy = b[0] - a[0], b[1] - a[1]
+    length_sq = dx * dx + dy * dy
+    t = 0.0 if length_sq <= _EPS else max(0.0, min(1.0, (
+        (point[0] - a[0]) * dx + (point[1] - a[1]) * dy
+    ) / length_sq))
+    return math.hypot(point[0] - (a[0] + dx * t), point[1] - (a[1] + dy * t))
+
+
+def check_node_distances(
+    segments: list[dict], cell_cm: float, grid_pitch: float = GRID_STEP_N,
+) -> list[tuple[str, str, float, float]]:
+    """П4: non-incident nodes and node-to-foreign-wall clearance.
+
+    #330 §4.5: the all-pairs form cost 372 ms on 576 atoms. Nodes and padded
+    segment bounding boxes are hashed into a grid with the threshold as cell
+    size; each node is compared only against its 9-cell neighbourhood.
+    Verdicts are identical — pinned by the equivalence unit and the parity
+    suite. Pair order inside the subject follows the lexicographic key order,
+    which replaces the i<j of the all-pairs loop.
+    """
+    nodes: dict[str, list] = {}
+    for segment in segments:
+        nodes[_key(segment["a"])] = segment["a"]
+        nodes[_key(segment["b"])] = segment["b"]
+    min_units = cm_to_units(MIN_NODE_DISTANCE_CM, cell_cm, grid_pitch)
+    size = min_units if min_units > _EPS else 1.0
+
+    node_grid: dict[tuple[int, int], list] = {}
+    for node_key, point in nodes.items():
+        node_grid.setdefault(
+            (int(point[0] // size), int(point[1] // size)), []
+        ).append((node_key, point))
+    segment_grid: dict[tuple[int, int], list] = {}
+    for segment in segments:
+        x0 = min(segment["a"][0], segment["b"][0]) - min_units
+        x1 = max(segment["a"][0], segment["b"][0]) + min_units
+        y0 = min(segment["a"][1], segment["b"][1]) - min_units
+        y1 = max(segment["a"][1], segment["b"][1]) + min_units
+        for cx in range(int(x0 // size), int(x1 // size) + 1):
+            for cy in range(int(y0 // size), int(y1 // size) + 1):
+                segment_grid.setdefault((cx, cy), []).append(segment)
+
+    violations: list[tuple[str, str, float, float]] = []
+    for node_key, point in nodes.items():
+        cx, cy = int(point[0] // size), int(point[1] // size)
+        for dx in (-1, 0, 1):
+            for dy in (-1, 0, 1):
+                for other_key, other in node_grid.get((cx + dx, cy + dy), ()):
+                    if node_key >= other_key:
+                        continue
+                    distance = _length(point, other)
+                    # #331 §2.1: raw debris within the incidence quantum is ONE
+                    # node on two neighbouring keys — never a near miss.
+                    if distance <= _INCIDENT_EPS:
+                        continue
+                    if distance < min_units - 1e-9:
+                        violations.append((
+                            "distance", f"{node_key} ↔ {other_key}",
+                            (distance / grid_pitch) * (cell_cm or 1),
+                            MIN_NODE_DISTANCE_CM,
+                        ))
+        for segment in segment_grid.get((cx, cy), ()):
+            # A node that belongs to the wall is a legal corner or T-joint.
+            if _key(segment["a"]) == node_key or _key(segment["b"]) == node_key:
+                continue
+            distance = _distance_to_segment(point, segment["a"], segment["b"])
+            # Sitting exactly ON the wall is the other legal incidence.
+            if distance <= _INCIDENT_EPS:
+                continue
+            if distance < min_units - 1e-9:
+                violations.append((
+                    "distance",
+                    f"{node_key} → {segment.get('id') or _key(segment['a'])}",
+                    (distance / grid_pitch) * (cell_cm or 1),
+                    MIN_NODE_DISTANCE_CM,
+                ))
+    return violations
+
+def space_violations(space: dict) -> list[tuple[str, str, float, float]]:
+    """П1–П4 over one space, in the frontend's order."""
+    segments = limit_segments(space)
+    cell_cm = float(space.get("cell_cm") or 1)
+    return [
+        *check_nodes(segments),
+        *check_segment_lengths(segments, cell_cm),
+        *check_node_distances(segments, cell_cm),
+    ]
+
+
+def _migrated_spaces(config: dict | None, *, side: str = "previous") -> dict[str, dict]:
+    """Spaces of one document AFTER the wall-segment migration, by id.
+
+    The limits read `wall_segments`, so a document that predates the catalogue
+    reports NO walls at all — a legacy space would answer "no violations"
+    regardless of its geometry. Comparing such a baseline against a candidate
+    the client already migrated counts every inherited violation as new and
+    refuses an unrelated edit (spec §3 forbids exactly that). Both sides are
+    therefore judged after the SAME migration, mirroring the frontend barrier.
+
+    A document that cannot be migrated is not a reason to refuse the write:
+    the wall-model barrier owns that verdict and reports it with its own code.
+    Here it simply means there is no baseline to inherit from.
+    """
+    if not isinstance(config, dict):
+        return {}
+    # #330 §4.6: a document that already carries the current catalogue is
+    # used as-is. The migration's purpose here is to never compare a
+    # catalogue-less legacy baseline against a migrated candidate; a
+    # current-version document has the catalogue, so the purpose is met with
+    # zero work — while a no-op re-migration costs 0.8 s of _atomize on a
+    # 576-atom plan. Equivalence "as-is == migrated" for current-version
+    # documents is pinned by a parity case.
+    if int(config.get("model_version") or 0) >= WALL_SEGMENT_MODEL_VERSION:
+        migrated = config
+    else:
+        try:
+            migrated, _ = commit_wall_segment_model(config)
+        except (WallSegmentMigrationError, ValueError) as error:
+            # The wall-model barrier owns this verdict and reports it with its
+            # own code; here it merely means "no catalogue to read".
+            _LOGGER.debug("junction limits: %s migration fell back: %s", side, error)
+            migrated = config
+        except Exception:
+            # #331 §2.6 (AC6): a genuine migration bug on the CANDIDATE side
+            # must surface as an honest WS error, not a silent "no
+            # violations". The PREVIOUS side keeps the wide fallback — an
+            # unprovable inheritance is no reason to block an unrelated write
+            # (the exact P1 symptom this task fixes).
+            if side == "candidate":
+                raise
+            _LOGGER.debug("junction limits: previous-side migration bug swallowed by design")
+            migrated = config
+    return {
+        str(space.get("id")): space
+        for space in (migrated or {}).get("spaces") or []
+        if isinstance(space, dict)
+    }
+
+
+def space_violation_counts(spaces: dict[str, dict]) -> dict[str, dict[str, int]]:
+    """Violation counts per space per rule — the shape the barrier consumes
+    and the rev cache (#330 §4.2) stores. Documents are NOT retained."""
+    result: dict[str, dict[str, int]] = {}
+    for space_id, space in spaces.items():
+        counts: dict[str, int] = {}
+        for rule, _subject, _actual, _limit in space_violations(space):
+            counts[rule] = counts.get(rule, 0) + 1
+        result[space_id] = counts
+    return result
+
+
+def validate_junction_limits(
+    config: dict, previous: dict | None = None, *,
+    baseline_counts: dict[str, dict[str, int]] | None = None,
+) -> dict[str, dict[str, int]]:
+    """Refuse a write that ADDS a junction violation; inherit the rest.
+
+    Counted per RULE, not per subject: a structural write re-atomises and
+    re-keys contour segments, so subject identity is not stable across the
+    barrier and matching by it would report an inherited violation as new
+    (the mistake that refused legitimate resizes on the frontend). Spec §3:
+    a write may keep existing violations, it may never add one.
+
+    A LEGACY document still goes through `commit_wall_segment_model` first,
+    so a catalogue-less baseline is compared in the same terms as the
+    candidate; a current-version document is used as-is (#330 §4.6).
+
+    `baseline_counts` (#330 §4.2) replaces the previous document entirely:
+    the caller caches the counts of the stored document by config_rev, so a
+    repeated write does not even touch `previous`. Returns the candidate's
+    counts — the value to cache after a successful write.
+    """
+    if baseline_counts is not None:
+        old_counts = baseline_counts
+    else:
+        old_counts = space_violation_counts(_migrated_spaces(previous))
+    new_spaces = _migrated_spaces(config, side="candidate")
+    candidate_counts: dict[str, dict[str, int]] = {}
+    for space_id, space in new_spaces.items():
+        # A brand-new space has nothing to inherit from — but neither is a
+        # first write allowed to arrive already broken.
+        before = old_counts.get(space_id) or {}
+        after: dict[str, list[tuple[str, str, float, float]]] = {}
+        for violation in space_violations(space):
+            after.setdefault(violation[0], []).append(violation)
+        candidate_counts[space_id] = {
+            rule: len(items) for rule, items in after.items()
+        }
+        for rule, items in after.items():
+            if len(items) > before.get(rule, 0):
+                _, subject, actual, limit = items[0]
+                raise JunctionLimitError(space_id, rule, subject, actual, limit)
+    return candidate_counts
@@ -16,5 +16,5 @@
  "issue_tracker": "https://github.com/Matysh/houseplan-card/issues",
  "requirements": [],
  "single_config_entry": true,
-  "version": "1.67.0-rc.3"
+  "version": "1.69.0-beta.1"
 }
@@ -101,6 +101,11 @@ class HouseplanData:
    # Parsed import candidates are short-lived, user-bound and memory-only.
    # dict keeps insertion order, which lets the preview service evict oldest.
    import_previews: dict[str, dict[str, Any]] = field(default_factory=dict)
+    # #330 §4.2: junction-limit violation counts of the STORED document,
+    # keyed by its rev — (rev, {space_id: {rule: count}}). One slot,
+    # memory-only, invalidated by a rev mismatch; the previous document is
+    # not re-judged on every write. Counts only — documents are never held.
+    junction_baseline: tuple[int, dict[str, dict[str, int]]] | None = None


 HouseplanConfigEntry = ConfigEntry[HouseplanData]
@@ -187,8 +187,11 @@ class TrailRecorder:
            # just finished calibrating) must start recording NOW, not at the
            # next state change — otherwise the first seconds of the path are
            # lost.
+            now = time.time()
+            changed = False
            for src in self.pairs:
-                self._sample(src, time.time())
+                changed |= self._sample(src, now)
+            self._handle_sample_change(changed, now)

    def _source_failure_reason(self, source: str) -> str | None:
        """Classify only refresh-time health evidence.
@@ -244,25 +247,70 @@ class TrailRecorder:

    async def async_delete(self, marker: str) -> bool:
        """Stop and erase one marker without racing subscription refresh/save."""
+        return bool(await self._async_delete_many({marker}))
+
+    async def async_purge_orphans(self, config: dict[str, Any]) -> int:
+        """Erase trails whose marker is absent or a removal tombstone.
+
+        A tombstone deliberately stays in config so discovery cannot resurrect
+        a deleted device.  For live tracking and trail ownership it is absent:
+        this is the same boundary used by ``async_refresh`` above.
+        """
+        live_marker_ids = {
+            str(marker.get("id"))
+            for marker in config.get("markers") or []
+            if marker.get("id") is not None and marker.get("removed") is not True
+        }
+        orphan_ids = set(self.book.data) - live_marker_ids
+        if not orphan_ids:
+            return 0
+        try:
+            return await self._async_delete_many(orphan_ids)
+        except Exception:  # noqa: BLE001 — config commit already succeeded
+            _LOGGER.exception(
+                "House Plan: removing orphan vacuum trails failed: markers=%s",
+                sorted(orphan_ids),
+            )
+            return 0
+
+    async def _async_delete_many(self, markers: set[str]) -> int:
+        """Delete one or more books with one subscription/store transaction."""
        async with self._refresh_lock:
            # The trail book owns deletion. When it has no such marker, this
            # is a no-op and must not silently damage the live tracking graph.
-            removed = self.book.delete(marker)
+            removed = {
+                marker: self.book.data.pop(marker)
+                for marker in markers
+                if marker in self.book.data
+            }
            if not removed:
-                return False
-            for src in list(self.pairs):
-                kept = [pair for pair in self.pairs[src] if pair[0] != marker]
-                if kept:
-                    self.pairs[src] = kept
-                else:
-                    del self.pairs[src]
-            self._resubscribe()
-            if self._unsub_save:
-                self._unsub_save()
-                self._unsub_save = None
-            await self.store.async_save(self.book.data)
+                return 0
+            previous_pairs = {src: list(pairs) for src, pairs in self.pairs.items()}
+            had_pending_save = self._unsub_save is not None
+            try:
+                for src in list(self.pairs):
+                    kept = [pair for pair in self.pairs[src] if pair[0] not in removed]
+                    if kept:
+                        self.pairs[src] = kept
+                    else:
+                        del self.pairs[src]
+                self._resubscribe()
+                if self._unsub_save:
+                    self._unsub_save()
+                    self._unsub_save = None
+                await self.store.async_save(self.book.data)
+            except Exception:
+                # The store is the durable authority. Restore the in-memory
+                # owner graph so the next successful config sync can retry
+                # instead of leaving an orphan on disk forever (#335).
+                self.book.data.update(removed)
+                self.pairs = previous_pairs
+                self._resubscribe()
+                if had_pending_save:
+                    self._schedule_save()
+                raise
        self.hass.bus.async_fire("houseplan_trail_updated", {})
-        return True
+        return len(removed)

    def _resubscribe(self) -> None:
        """Replace the state subscription for the current pair graph."""
@@ -344,6 +392,10 @@ class TrailRecorder:
        for src, pair_list in self.pairs.items():
            if eid == src or any(eid == vac for _, vac in pair_list):
                changed |= self._sample(src, now)
+        self._handle_sample_change(changed, now)
+
+    def _handle_sample_change(self, changed: bool, now: float) -> None:
+        """Persist and announce one logical sampling pass when it changed."""
        if changed:
            self._schedule_save()
            if now - self._last_fire >= FIRE_THROTTLE_S:
@@ -0,0 +1,30 @@
+{
+  "config": {
+    "step": {
+      "user": {
+        "title": "House Plan",
+        "data": {
+          "admin_only": "Nur Administratoren dürfen den Grundriss bearbeiten"
+        }
+      }
+    },
+    "abort": {
+      "single_instance_allowed": "Bereits konfiguriert – es ist nur eine Instanz zulässig."
+    }
+  },
+  "options": {
+    "step": {
+      "init": {
+        "data": {
+          "admin_only": "Nur Administratoren dürfen den Grundriss bearbeiten"
+        }
+      }
+    }
+  },
+  "issues": {
+    "broken_plan": {
+      "title": "Grundrissbild fehlt",
+      "description": "Die Plandatei `{file}` für den Bereich `{space}` wurde in `config/houseplan/plans/` nicht gefunden. In den Bereichseinstellungen der House-Plan-Karte den Plan erneut hochladen."
+    }
+  }
+}
@@ -5,6 +5,7 @@ Kept separate so it can be covered by unit tests (only voluptuous is needed).
 from __future__ import annotations

 from collections import Counter
+import copy
 import math
 import re

@@ -77,6 +78,137 @@ class PartitionOpeningJambMarginError(ValueError):
        )


+class WallModelClientOutdatedError(ValueError):
+    """A stale client tried to replace an already-migrated v8 document."""
+
+    code = "wall_model_client_outdated"
+
+
+def _legacy_wall_model_projection(config: dict) -> dict:
+    """Structural view an older client can faithfully round-trip."""
+    projected = copy.deepcopy(config)
+    projected.pop("model_version", None)
+    for space in projected.get("spaces") or []:
+        space.pop("wall_segments", None)
+        for room in space.get("rooms") or []:
+            room.pop("wall_ids", None)
+        for draft in space.get("room_drafts") or []:
+            for segment in draft.get("segments") or []:
+                segment.pop("id", None)
+        for opening in space.get("openings") or []:
+            host = opening.get("host")
+            if isinstance(host, dict) and host.get("kind") == "wall":
+                opening.pop("host", None)
+    return projected
+
+
+def _catalog_coupled_wall_geometry_projection(config: dict) -> list[dict]:
+    """Legacy geometry whose edit must also update the v8 contour catalogue.
+
+    Drafts, partitions and columns carry their own ids. Openings carry an
+    explicit v8 host and are checked against it by CONFIG_SCHEMA. None of those
+    independent objects requires a different contour wall_segments catalogue.
+    """
+    result: list[dict] = []
+    for space in config.get("spaces") or []:
+        rooms = []
+        for room in space.get("rooms") or []:
+            rooms.append({key: copy.deepcopy(room.get(key)) for key in (
+                "id", "poly", "x", "y", "w", "h", "open_to"
+            ) if key in room})
+        result.append({
+            "id": space.get("id"),
+            "rooms": rooms,
+            "walls": copy.deepcopy(space.get("walls") or []),
+            "open_spans": copy.deepcopy(space.get("open_spans") or []),
+        })
+    return result
+
+
+def _wall_catalog_projection(config: dict) -> list[dict]:
+    """Authoritative part a current v8 structural writer must update."""
+    return [{
+        "id": space.get("id"),
+        "wall_segments": copy.deepcopy(space.get("wall_segments")),
+    } for space in config.get("spaces") or []]
+
+
+def _restore_wall_model_fields(config: dict, previous: dict) -> None:
+    """Hydrate only v8 identity fields after an exact legacy round-trip."""
+    config["model_version"] = previous["model_version"]
+    old_spaces = {str(space.get("id")): space for space in previous.get("spaces") or []}
+    for space in config.get("spaces") or []:
+        old_space = old_spaces.get(str(space.get("id")))
+        if old_space is None:
+            continue
+        space["wall_segments"] = copy.deepcopy(old_space.get("wall_segments") or [])
+        old_rooms = {str(room.get("id")): room for room in old_space.get("rooms") or []}
+        for room in space.get("rooms") or []:
+            old_room = old_rooms.get(str(room.get("id")))
+            if old_room is not None and "wall_ids" in old_room:
+                room["wall_ids"] = copy.deepcopy(old_room["wall_ids"])
+        old_drafts = {str(draft.get("id")): draft for draft in old_space.get("room_drafts") or []}
+        for draft in space.get("room_drafts") or []:
+            old_draft = old_drafts.get(str(draft.get("id")))
+            if old_draft is None:
+                continue
+            old_segments = old_draft.get("segments") or []
+            for index, segment in enumerate(draft.get("segments") or []):
+                if index < len(old_segments) and old_segments[index].get("id"):
+                    segment["id"] = old_segments[index]["id"]
+        old_openings = {
+            str(opening.get("id")): opening for opening in old_space.get("openings") or []
+        }
+        for opening in space.get("openings") or []:
+            old_opening = old_openings.get(str(opening.get("id")))
+            old_host = (old_opening or {}).get("host")
+            if isinstance(old_host, dict) and old_host.get("kind") == "wall":
+                opening["host"] = copy.deepcopy(old_host)
+
+
+def validate_wall_model_transition(config: dict, previous: dict | None) -> None:
+    """Do not let omission of model_version bypass v8 semantic validation."""
+    try:
+        old_model = int((previous or {}).get("model_version", 0))
+        new_model = int(config.get("model_version", 0))
+    except (TypeError, ValueError):
+        return  # CONFIG_SCHEMA owns malformed values.
+    previous = previous or {}
+    contour_geometry_changed = (
+        _catalog_coupled_wall_geometry_projection(config)
+        != _catalog_coupled_wall_geometry_projection(previous)
+    )
+    if old_model >= 8 and new_model < 8:
+        if not contour_geometry_changed:
+            _restore_wall_model_fields(config, previous or {})
+            # Re-run semantic parity after hydration; previous identity is
+            # accepted only when it still matches the submitted projections.
+            validated = CONFIG_SCHEMA(config)
+            config.clear()
+            config.update(validated)
+            return
+        raise WallModelClientOutdatedError(
+            f"stored model={old_model}; submitted model={new_model}"
+        )
+    if old_model >= 8 and 8 <= new_model <= old_model and contour_geometry_changed:
+        # The realistic stale-client case echoes model_version and the unknown
+        # catalogue verbatim while changing room/contour geometry. Let the
+        # frontend show the dedicated reload guidance instead of a generic
+        # schema error. Independent drafts, partitions, columns and explicitly
+        # hosted openings are validated by CONFIG_SCHEMA without requiring a
+        # contour catalogue change (#314).
+        #
+        # A submitted model ABOVE the stored one is excluded on purpose (#319):
+        # a stale client can only echo the stored version, never raise it. The
+        # first write of a newer client legitimately drops legacy projection
+        # fields (an orphan open_span/open_to) without touching the catalogue;
+        # treating that as "outdated" wedged every structural write forever.
+        if _wall_catalog_projection(config) == _wall_catalog_projection(previous):
+            raise WallModelClientOutdatedError(
+                f"stored model={old_model}; unchanged wall catalogue"
+            )
+
+
 # One normalized canvas width contains this many physical grid cells. Keep in
 # sync with GRID_STEP_N/NORM_W in the frontend; it is a geometry scale, not a
 # user setting.
@@ -520,34 +652,39 @@ def validate_partition_opening_hosts(
        for opening in space.get("openings") or []:
            opening_id = str(opening.get("id", ""))
            old = old_openings.get(opening_id)
-            if old and old.get("host") is not None and opening.get("host") is None:
-                if not (allow_optimize_rehost and old_space
-                        and _safe_optimize_partition_rehost(
-                            space, old_space, opening, old
-                        )):
-                    raise PartitionOpeningHostError(
-                        f"space={space_id}; opening={opening_id}; host removed"
-                    )
+            old_host = (old or {}).get("host")
            host = opening.get("host")
+            if (old and isinstance(old_host, dict)
+                    and old_host.get("kind") == "partition"):
+                same_partition = (
+                    isinstance(host, dict) and host.get("kind") == "partition"
+                    and str(host.get("id", "")) == str(old_host.get("id", ""))
+                )
+                residual_rehost = (
+                    isinstance(host, dict) and host.get("kind") == "partition"
+                    and not same_partition
+                )
+                proved = same_partition or (
+                    allow_optimize_rehost and old_space is not None
+                    and (_safe_optimize_residual_rehost(
+                        space, old_space, opening, old
+                    ) if residual_rehost else _safe_optimize_partition_rehost(
+                        space, old_space, opening, old
+                    ))
+                )
+                if not proved:
+                    raise PartitionOpeningHostError(
+                        f"space={space_id}; opening={opening_id}; host changed"
+                    )
            if host is None:
                continue
+            if host.get("kind") != "partition":
+                continue
            partition = partitions.get(str(host.get("id", "")))
            if partition is None:
                # SPACE_SCHEMA owns missing-host diagnostics.
                continue
-            old_host = (old or {}).get("host")
            old_partition = old_partitions.get(str((old_host or {}).get("id", "")))
-            if (allow_optimize_rehost and old and old_space
-                    and isinstance(old_host, dict)
-                    and old_host.get("kind") == "partition"
-                    and isinstance(host, dict) and host.get("kind") == "partition"
-                    and old_host.get("id") != host.get("id")
-                    and not _safe_optimize_residual_rehost(
-                        space, old_space, opening, old
-                    )):
-                raise PartitionOpeningHostError(
-                    f"space={space_id}; opening={opening_id}; residual host changed"
-                )
            ax, ay = partition["a"]
            bx, by = partition["b"]
            span = ((bx - ax) ** 2 + (by - ay) ** 2) ** 0.5
@@ -910,7 +1047,11 @@ MAX_ROOMS = 400
 MAX_MARKERS = 2000
 MAX_OPENINGS = 500
 MAX_DECOR = 1000
-MAX_WALLS = 500
+# v8 atomises room boundaries. The 2 MiB wire cap is the practical bound; this
+# structural cap mirrors MAX_ROOMS * MAX_POLY_POINTS without depending on the
+# later constant declaration.
+MAX_WALLS = 200_000
+MAX_WALL_SEGMENTS = 200_000
 MAX_ROOM_DRAFTS = 200
 MAX_DRAFT_SEGMENTS = 2000
 MAX_PARTITIONS = 2000
@@ -1075,6 +1216,10 @@ ROOM_SCHEMA = vol.All(
            vol.Optional("w"): _EXTENT,
            vol.Optional("h"): _EXTENT,
            vol.Optional("poly"): vol.All([POINT], vol.Length(min=3, max=MAX_POLY_POINTS)),
+            vol.Optional("wall_ids"): vol.All(
+                [vol.All(str, vol.Length(min=1, max=64))],
+                vol.Length(min=3, max=MAX_POLY_POINTS),
+            ),
        },
        extra=vol.ALLOW_EXTRA,
    ),
@@ -1246,6 +1391,26 @@ WALL_SCHEMA = vol.All(
 )


+def _wall_segment_nonzero(value: dict) -> dict:
+    if value["a"] == value["b"]:
+        raise vol.Invalid("wall segment endpoints must differ")
+    return value
+
+
+WALL_SEGMENT_SCHEMA = vol.All(
+    vol.Schema(
+        {
+            vol.Required("id"): vol.All(str, vol.Length(min=1, max=64)),
+            vol.Required("a"): POINT,
+            vol.Required("b"): POINT,
+            vol.Required("cm"): vol.All(_finite, vol.Range(min=0, max=100)),
+        },
+        extra=vol.ALLOW_EXTRA,
+    ),
+    _wall_segment_nonzero,
+)
+
+
 def _room_draft_segments(value: dict) -> dict:
    """An open draft has exactly one thickness per consecutive edge."""
    if len(value.get("segments", [])) != max(0, len(value.get("points", [])) - 1):
@@ -1261,7 +1426,10 @@ ROOM_DRAFT_SCHEMA = vol.All(
            vol.Required("id"): vol.All(str, vol.Length(min=1, max=64)),
            vol.Required("points"): vol.All([POINT], vol.Length(min=2, max=500)),
            vol.Required("segments"): vol.All(
-                [vol.Schema({vol.Required("cm"): vol.All(_finite, vol.Range(min=1, max=100))},
+                [vol.Schema({
+                    vol.Optional("id"): vol.All(str, vol.Length(min=1, max=64)),
+                    vol.Required("cm"): vol.All(_finite, vol.Range(min=0, max=100)),
+                },
                            extra=vol.ALLOW_EXTRA)],
                vol.Length(min=1, max=499),
            ),
@@ -1283,7 +1451,7 @@ PARTITION_SCHEMA = vol.All(
            vol.Required("id"): vol.All(str, vol.Length(min=1, max=64)),
            vol.Required("a"): POINT,
            vol.Required("b"): POINT,
-            vol.Required("cm"): vol.All(_finite, vol.Range(min=1, max=100)),
+            vol.Required("cm"): vol.All(_finite, vol.Range(min=0, max=100)),
        },
        extra=vol.ALLOW_EXTRA,
    ),
@@ -1325,11 +1493,22 @@ PARTITION_OPENING_HOST_SCHEMA = vol.Schema(
    extra=vol.PREVENT_EXTRA,
 )

+WALL_OPENING_HOST_SCHEMA = vol.Schema(
+    {
+        vol.Required("kind"): vol.Equal("wall"),
+        vol.Required("id"): vol.All(str, vol.Length(min=1, max=64)),
+        vol.Required("t"): vol.All(_finite, vol.Range(min=0, max=1)),
+    },
+    extra=vol.PREVENT_EXTRA,
+)
+
+OPENING_HOST_SCHEMA = vol.Any(PARTITION_OPENING_HOST_SCHEMA, WALL_OPENING_HOST_SCHEMA)
+

 def _space_geometry_invariants(value: dict) -> dict:
    """All stored geometry shares ids; draft segments also have a space cap."""
    seen: set[str] = set()
-    for key in ("rooms", "openings", "decor", "room_drafts", "partitions", "wall_columns"):
+    for key in ("rooms", "openings", "decor", "room_drafts", "partitions", "wall_columns", "wall_segments"):
        for item in value.get(key, []):
            item_id = item.get("id")
            if not item_id:
@@ -1342,6 +1521,14 @@ def _space_geometry_invariants(value: dict) -> dict:
    )
    if draft_segments > MAX_DRAFT_SEGMENTS:
        raise vol.Invalid("too many saved room-draft segments")
+    for draft in value.get("room_drafts", []):
+        for segment in draft.get("segments", []):
+            segment_id = segment.get("id")
+            if not segment_id:
+                continue
+            if segment_id in seen:
+                raise vol.Invalid("geometry object ids must be unique within a space")
+            seen.add(segment_id)
    partitions = {
        item.get("id"): item for item in value.get("partitions", []) if item.get("id")
    }
@@ -1350,6 +1537,8 @@ def _space_geometry_invariants(value: dict) -> dict:
        host = opening.get("host")
        if host is None:
            continue
+        if host["kind"] != "partition":
+            continue
        partition = partitions.get(host["id"])
        if partition is None:
            raise vol.Invalid("partition opening host must exist in the same space")
@@ -1430,7 +1619,7 @@ SPACE_SCHEMA = vol.All(vol.Schema(
                    vol.Optional("invert"): bool,
                    vol.Optional("flip_h"): bool,
                    vol.Optional("flip_v"): bool,
-                    vol.Optional("host"): PARTITION_OPENING_HOST_SCHEMA,
+                    vol.Optional("host"): OPENING_HOST_SCHEMA,
                },
                extra=vol.ALLOW_EXTRA,
            )
@@ -1439,6 +1628,10 @@ SPACE_SCHEMA = vol.All(vol.Schema(
        # (midpoint + direction), thickness always in centimetres. Optional —
        # a space without `walls` validates and renders exactly as before.
        vol.Optional("walls"): vol.All([WALL_SCHEMA], vol.Length(max=MAX_WALLS)),
+        vol.Optional("wall_segments"): vol.All(
+            [WALL_SEGMENT_SCHEMA], vol.Length(max=MAX_WALL_SEGMENTS)
+        ),
+        vol.Optional("zero_wall_style"): vol.In(["dashed", "solid"]),
        vol.Optional("room_drafts"): vol.All(
            [ROOM_DRAFT_SCHEMA], vol.Length(max=MAX_ROOM_DRAFTS)
        ),
@@ -1567,9 +1760,124 @@ MARKER_SCHEMA = vol.Schema(
    },
    extra=vol.ALLOW_EXTRA,
 )
+
+
+def _canonical_segment_key(a: list, b: list) -> tuple:
+    """Endpoint-order-independent exact key after the shared canonicalizer."""
+    pa = (round(float(a[0]), 12), round(float(a[1]), 12))
+    pb = (round(float(b[0]), 12), round(float(b[1]), 12))
+    return (pa, pb) if pa <= pb else (pb, pa)
+
+
+def _config_wall_segment_invariants(value: dict) -> dict:
+    """Fail closed when a v8+ writer sends stale ids or wall projections."""
+    try:
+        model = int(value.get("model_version", 0))
+    except (TypeError, ValueError):
+        raise vol.Invalid("model_version must be an integer") from None
+    if model < 8:
+        return value
+
+    for space in value.get("spaces", []):
+        if model >= 9:
+            if "open_spans" in space or any("open_to" in room for room in space.get("rooms", [])):
+                raise vol.Invalid("v9 config must not contain legacy open boundaries")
+        segments = space.get("wall_segments")
+        if segments is None:
+            raise vol.Invalid("v8+ space requires wall_segments")
+        by_id = {segment["id"]: segment for segment in segments}
+        if len(by_id) != len(segments):
+            raise vol.Invalid("wall segment ids must be unique")
+
+        owners: dict[str, set[str]] = {segment_id: set() for segment_id in by_id}
+        for room in space.get("rooms", []):
+            poly = room.get("poly")
+            wall_ids = room.get("wall_ids")
+            if not poly or not wall_ids or len(poly) != len(wall_ids):
+                raise vol.Invalid("v8+ room wall_ids must match poly edges")
+            room_id = room["id"]
+            for index, segment_id in enumerate(wall_ids):
+                segment = by_id.get(segment_id)
+                if segment is None:
+                    raise vol.Invalid("room wall id must reference the same space")
+                edge_key = _canonical_segment_key(poly[index], poly[(index + 1) % len(poly)])
+                if edge_key != _canonical_segment_key(segment["a"], segment["b"]):
+                    raise vol.Invalid("room wall reference geometry must match its edge")
+                owners[segment_id].add(room_id)
+        if any(len(room_ids) not in (1, 2) for room_ids in owners.values()):
+            raise vol.Invalid("wall segment must have one or two room owners")
+
+        expected_walls = {
+            _canonical_segment_key(segment["a"], segment["b"]): float(segment["cm"])
+            for segment in segments if float(segment["cm"]) > 0
+        }
+        actual_walls: dict[tuple, float] = {}
+        for wall in space.get("walls", []):
+            if "a" not in wall or "b" not in wall:
+                raise vol.Invalid("wall compatibility projection requires exact endpoints")
+            key = _canonical_segment_key(wall["a"], wall["b"])
+            if key in actual_walls:
+                raise vol.Invalid("wall compatibility projection must be unique")
+            actual_walls[key] = float(wall["cm"])
+        if actual_walls != expected_walls:
+            raise vol.Invalid("wall compatibility projection must match wall_segments")
+
+        for draft in space.get("room_drafts", []):
+            if any(not segment.get("id") for segment in draft.get("segments", [])):
+                raise vol.Invalid("v8+ draft wall segments require ids")
+
+        partitions = {item["id"]: item for item in space.get("partitions", [])}
+        wall_opening_intervals: dict[str, list[tuple[float, float]]] = {}
+        for opening in space.get("openings", []):
+            host = opening.get("host")
+            if host is None:
+                # #316 §3.3: a degraded migration may leave a contour opening
+                # unhosted. It is inert (no body/tunnel/cut) and excluded from
+                # the interval checks; a later edit can re-place it.
+                continue
+            if host["kind"] == "partition":
+                if host["id"] not in partitions:
+                    raise vol.Invalid("partition opening host must exist in the same space")
+                if float(partitions[host["id"]]["cm"]) <= 0:
+                    raise vol.Invalid("opening host must have positive thickness")
+                continue
+            segment = by_id.get(host["id"])
+            if segment is None:
+                raise vol.Invalid("wall opening host must exist in the same space")
+            if float(segment["cm"]) <= 0:
+                raise vol.Invalid("opening host must have positive thickness")
+            t = float(host["t"])
+            x = float(segment["a"][0]) + (float(segment["b"][0]) - float(segment["a"][0])) * t
+            y = float(segment["a"][1]) + (float(segment["b"][1]) - float(segment["a"][1])) * t
+            if abs(x - float(opening["x"])) > 2e-8 or abs(y - float(opening["y"])) > 2e-8:
+                raise vol.Invalid("wall opening geometry must match its host")
+            expected_angle = math.degrees(math.atan2(
+                float(segment["b"][1]) - float(segment["a"][1]),
+                float(segment["b"][0]) - float(segment["a"][0]),
+            ))
+            if _angle_delta_mod_180(float(opening["angle"]), expected_angle) > 8:
+                raise vol.Invalid("wall opening angle must match its host")
+            span = ((segment["b"][0] - segment["a"][0]) ** 2
+                    + (segment["b"][1] - segment["a"][1]) ** 2) ** 0.5
+            along = t * span
+            length = float(opening["length"])
+            if length > span or along - length / 2 < -1e-9 or along + length / 2 > span + 1e-9:
+                raise vol.Invalid("wall opening must fit inside its host")
+            lo, hi = along - length / 2, along + length / 2
+            occupied = wall_opening_intervals.setdefault(host["id"], [])
+            if any(max(lo, old_lo) < min(hi, old_hi) - 1e-9
+                   for old_lo, old_hi in occupied):
+                raise vol.Invalid("wall openings must not overlap")
+            occupied.append((lo, hi))
+    return value
+
+
 CONFIG_SCHEMA = vol.All(
    vol.Schema(
        {
+            vol.Optional("model_version"): vol.All(
+                vol.Coerce(int), vol.Range(min=0, max=1_000_000)
+            ),
            vol.Required("spaces"): vol.All([SPACE_SCHEMA], vol.Length(max=MAX_SPACES)),
            vol.Optional("markers", default=list): vol.All([MARKER_SCHEMA], vol.Length(max=MAX_MARKERS)),
            vol.Optional("settings", default=dict): vol.Schema(
@@ -1604,4 +1912,5 @@ CONFIG_SCHEMA = vol.All(
        extra=vol.ALLOW_EXTRA,  # unknown (legacy) keys do not break loading
    ),
    canonicalize_config_geometry,
+    _config_wall_segment_invariants,
 )
@@ -0,0 +1,684 @@
+"""Deterministic persisted contour-wall identity (model v9, issues #282/#306).
+
+This is the backend twin of ``src/wall-segment-model.ts``.  Import preview is
+a server-side structural writer, so it cannot depend on a browser being open
+to upgrade v7 backups before validating/remapping them.
+"""
+from __future__ import annotations
+
+import base64
+import copy
+import hashlib
+import math
+import uuid
+from typing import Any
+
+from .coordinate_canonicalization import canonicalize_config_geometry
+
+
+WALL_SEGMENT_MODEL_VERSION = 9
+GRID_STEP_N = 1 / 240
+EPS = 1e-9
+
+
+class WallSegmentMigrationError(ValueError):
+    """The candidate cannot be upgraded without guessing ownership."""
+
+    code = "wall_model_migration_blocked"
+
+    def __init__(self, reason: str, detail: str = "") -> None:
+        self.reason = reason
+        super().__init__(f"{reason}: {detail}" if detail else reason)
+
+
+def _point_key(point: list[float]) -> str:
+    return f"{float(point[0]):.12f},{float(point[1]):.12f}"
+
+
+def _span_key(a: list[float], b: list[float]) -> str:
+    ka, kb = _point_key(a), _point_key(b)
+    return f"{ka}|{kb}" if ka < kb else f"{kb}|{ka}"
+
+
+def _canonical_span(a: list[float], b: list[float]) -> tuple[list[float], list[float]]:
+    left, right = ([float(a[0]), float(a[1])], [float(b[0]), float(b[1])])
+    return (left, right) if _point_key(left) <= _point_key(right) else (right, left)
+
+
+def _length(a: list[float], b: list[float]) -> float:
+    return math.hypot(float(b[0]) - float(a[0]), float(b[1]) - float(a[1]))
+
+
+def _project_t(point: list[float], a: list[float], b: list[float]) -> float:
+    dx, dy = float(b[0]) - float(a[0]), float(b[1]) - float(a[1])
+    denominator = dx * dx + dy * dy
+    if denominator <= EPS * EPS:
+        return 0
+    return ((float(point[0]) - float(a[0])) * dx
+            + (float(point[1]) - float(a[1])) * dy) / denominator
+
+
+def _distance_to_segment(point: list[float], a: list[float], b: list[float]) -> float:
+    t = max(0.0, min(1.0, _project_t(point, a, b)))
+    return math.hypot(
+        float(point[0]) - (float(a[0]) + (float(b[0]) - float(a[0])) * t),
+        float(point[1]) - (float(a[1]) + (float(b[1]) - float(a[1])) * t),
+    )
+
+
+def _collinear_overlap(
+    a: list[float], b: list[float], c: list[float], d: list[float], epsilon: float = EPS,
+) -> float:
+    dx, dy = float(b[0]) - float(a[0]), float(b[1]) - float(a[1])
+    length = math.hypot(dx, dy)
+    if length <= epsilon:
+        return 0
+    cross_c = abs((float(c[0]) - float(a[0])) * dy
+                  - (float(c[1]) - float(a[1])) * dx) / length
+    cross_d = abs((float(d[0]) - float(a[0])) * dy
+                  - (float(d[1]) - float(a[1])) * dx) / length
+    if cross_c > epsilon or cross_d > epsilon:
+        return 0
+    tc, td = _project_t(c, a, b), _project_t(d, a, b)
+    return max(0.0, min(1.0, max(tc, td)) - max(0.0, min(tc, td))) * length
+
+
+def _room_poly(room: dict[str, Any]) -> list[list[float]]:
+    poly = room.get("poly")
+    if isinstance(poly, list) and len(poly) >= 3:
+        return [[float(point[0]), float(point[1])] for point in poly]
+    if all(isinstance(room.get(key), (int, float)) and not isinstance(room.get(key), bool)
+           for key in ("x", "y", "w", "h")):
+        x, y, width, height = (float(room[key]) for key in ("x", "y", "w", "h"))
+        return [[x, y], [x + width, y], [x + width, y + height], [x, y + height]]
+    return []
+
+
+def _shared_boundaries(first: list[list[float]], second: list[list[float]]) -> list[list[float]]:
+    result: list[list[float]] = []
+    epsilon = GRID_STEP_N * 0.04
+    for index, start in enumerate(first):
+        end = first[(index + 1) % len(first)]
+        dx, dy = end[0] - start[0], end[1] - start[1]
+        length = math.hypot(dx, dy)
+        if length < epsilon:
+            continue
+        ux, uy = dx / length, dy / length
+        for other_index, other_start in enumerate(second):
+            other_end = second[(other_index + 1) % len(second)]
+            tolerance = max(epsilon, length * 1e-6)
+            distances = [
+                abs((point[0] - start[0]) * uy - (point[1] - start[1]) * ux)
+                for point in (other_start, other_end)
+            ]
+            if max(distances) > tolerance:
+                continue
+            t1 = (other_start[0] - start[0]) * ux + (other_start[1] - start[1]) * uy
+            t2 = (other_end[0] - start[0]) * ux + (other_end[1] - start[1]) * uy
+            lo, hi = max(0.0, min(t1, t2)), min(length, max(t1, t2))
+            if hi - lo > epsilon:
+                result.append([
+                    start[0] + ux * lo, start[1] + uy * lo,
+                    start[0] + ux * hi, start[1] + uy * hi,
+                ])
+    return result
+
+
+def _wall_direction(a: list[float], b: list[float]) -> tuple[float, float]:
+    dx, dy = b[0] - a[0], b[1] - a[1]
+    length = math.hypot(dx, dy)
+    if length < 1e-12:
+        return 1.0, 0.0
+    dx, dy = dx / length, dy / length
+    if dx < -1e-12 or (abs(dx) <= 1e-12 and dy < 0):
+        dx, dy = -dx, -dy
+    return dx, dy
+
+
+def _js_round(value: float) -> int:
+    return math.floor(value + 0.5)
+
+
+def _quantize(value: float, pitch: float = GRID_STEP_N) -> float:
+    return _js_round(value / pitch) * pitch
+
+
+def _wall_key(a: list[float], b: list[float]) -> str:
+    midpoint_x = _quantize((float(a[0]) + float(b[0])) / 2)
+    midpoint_y = _quantize((float(a[1]) + float(b[1])) / 2)
+    dx, dy = _wall_direction(a, b)
+    angle = math.atan2(dy, dx)
+    if angle < 0:
+        angle += math.pi
+    angle = _js_round(angle * 1800) / 1800
+    return f"{midpoint_x:.6f},{midpoint_y:.6f}@{angle:.4f}"
+
+
+def deterministic_wall_segment_id(
+    space_id: str, a: list[float], b: list[float], owners: list[str], salt: str = "",
+) -> str:
+    ca, cb = _canonical_span(a, b)
+    seed = (f"{space_id}|{_point_key(ca)}|{_point_key(cb)}|"
+            f"{','.join(sorted(owners))}{salt}")
+    encoded = base64.b32encode(hashlib.sha256(seed.encode()).digest()).decode().lower()
+    return f"wall-{encoded[:20]}"
+
+
+def _translated_segment_delta(
+    a: list[float], b: list[float], previous: dict[str, Any],
+) -> tuple[float, float] | None:
+    def matches(pa: list[float], pb: list[float]) -> tuple[float, float] | None:
+        dx, dy = a[0] - pa[0], a[1] - pa[1]
+        if abs((b[0] - pb[0]) - dx) <= EPS and abs((b[1] - pb[1]) - dy) <= EPS:
+            return dx, dy
+        return None
+
+    return matches(previous["a"], previous["b"]) or matches(previous["b"], previous["a"])
+
+
+def _atomize(
+    space: dict[str, Any], old: dict[str, dict[str, Any]],
+) -> tuple[list[dict[str, Any]], list[dict[str, Any]]]:
+    rooms = space.get("rooms") or []
+    room_polys = {str(room.get("id", "")): _room_poly(room) for room in rooms}
+    global_breaks: list[list[float]] = []
+    explicit_spans = space.get("open_spans") or []
+    legacy_segments: list[list[float]] = []
+    for span in explicit_spans:
+        if isinstance(span, dict) and isinstance(span.get("a"), list) and isinstance(span.get("b"), list):
+            global_breaks.extend((span["a"], span["b"]))
+            legacy_segments.append([
+                float(span["a"][0]), float(span["a"][1]),
+                float(span["b"][0]), float(span["b"][1]),
+            ])
+    if not legacy_segments:
+        linked = lambda first, second: (
+            str(second.get("id", "")) in (first.get("open_to") or [])
+            or str(first.get("id", "")) in (second.get("open_to") or [])
+        )
+        for first_index, first in enumerate(rooms):
+            for second in rooms[first_index + 1:]:
+                if not linked(first, second):
+                    continue
+                for shared in _shared_boundaries(
+                    room_polys.get(str(first.get("id", "")), []),
+                    room_polys.get(str(second.get("id", "")), []),
+                ):
+                    legacy_segments.append(shared)
+                    global_breaks.extend(([shared[0], shared[1]], [shared[2], shared[3]]))
+    canonical_zero_segments: list[list[float]] = []
+    for room in rooms:
+        poly = room_polys.get(str(room.get("id", ""))) or []
+        wall_ids = room.get("wall_ids") or []
+        if len(wall_ids) != len(poly):
+            continue
+        for index, segment_id in enumerate(wall_ids):
+            previous = old.get(str(segment_id)) if isinstance(segment_id, str) else None
+            if previous is None or float(previous.get("cm", 0)) != 0:
+                continue
+            following = (index + 1) % len(poly)
+            canonical_zero_segments.append([
+                float(poly[index][0]), float(poly[index][1]),
+                float(poly[following][0]), float(poly[following][1]),
+            ])
+    for segment in canonical_zero_segments:
+        global_breaks.extend((segment[:2], segment[2:]))
+    zero_segments = canonical_zero_segments + legacy_segments
+
+    # #316 §3.1: a legacy open_spans/open_to cut never zeroes the atom that
+    # carries an existing contour opening; its edges become atom boundaries so
+    # the zero run continues on both sides of the opening.
+    legacy_era_openings: list[dict[str, Any]] = []
+    if legacy_segments:
+        for opening in space.get("openings") or []:
+            if not isinstance(opening, dict):
+                continue
+            host = opening.get("host")
+            if isinstance(host, dict) and host.get("kind") == "partition":
+                continue
+            try:
+                centre = [float(opening["x"]), float(opening["y"])]
+                angle = float(opening["angle"])
+                half = float(opening["length"]) / 2
+            except (KeyError, TypeError, ValueError):
+                continue
+            if half <= 0:
+                continue
+            # Only an opening that actually stands on a legacy cut changes the
+            # atomization; unrelated openings must not churn the catalogue.
+            if not any(
+                _distance_to_segment(centre, cut[:2], cut[2:]) <= GRID_STEP_N * 0.04
+                for cut in legacy_segments
+            ):
+                continue
+            legacy_era_openings.append(
+                {"centre": centre, "angle": angle, "half": half}
+            )
+            direction = (math.cos(math.radians(angle)), math.sin(math.radians(angle)))
+            global_breaks.extend((
+                [centre[0] - direction[0] * half, centre[1] - direction[1] * half],
+                [centre[0] + direction[0] * half, centre[1] + direction[1] * half],
+            ))
+
+    def _atom_carries_opening(a: list[float], b: list[float]) -> bool:
+        for entry in legacy_era_openings:
+            if not _angle_matches(a, b, entry["angle"]):
+                continue
+            if _distance_to_segment(entry["centre"], a, b) > GRID_STEP_N * 0.02:
+                continue
+            span = _length(a, b)
+            tc = _project_t(entry["centre"], a, b) * span
+            if tc + entry["half"] >= -EPS and tc - entry["half"] <= span + EPS:
+                return True
+        return False
+
+    for wall in space.get("walls") or []:
+        if isinstance(wall, dict) and isinstance(wall.get("a"), list) and isinstance(wall.get("b"), list):
+            global_breaks.extend((wall["a"], wall["b"]))
+
+    atoms_by_key: dict[str, dict[str, Any]] = {}
+    next_rooms: list[dict[str, Any]] = []
+    epsilon = GRID_STEP_N * 0.04
+    for raw_room in rooms:
+        room_id = str(raw_room.get("id", ""))
+        original = room_polys.get(room_id) or []
+        if not room_id or len(original) < 3:
+            raise WallSegmentMigrationError("invalid-room", room_id)
+        breaks = list(global_breaks)
+        for other_id, other_poly in room_polys.items():
+            if other_id == room_id:
+                continue
+            for shared in _shared_boundaries(original, other_poly):
+                breaks.extend(([shared[0], shared[1]], [shared[2], shared[3]]))
+
+        poly: list[list[float]] = []
+        parents: list[int] = []
+        for index, a in enumerate(original):
+            b = original[(index + 1) % len(original)]
+            poly.append(list(a))
+            parents.append(index)
+            length = _length(a, b)
+            if length < epsilon * 2:
+                raise WallSegmentMigrationError("zero-length", room_id)
+            gap = min(0.499, epsilon * 2 / length)
+            positions: list[float] = []
+            for breakpoint in breaks:
+                if _distance_to_segment(breakpoint, a, b) > epsilon:
+                    continue
+                t = _project_t(breakpoint, a, b)
+                if t <= gap or t >= 1 - gap:
+                    continue
+                if any(abs(existing - t) * length <= epsilon * 2 for existing in positions):
+                    continue
+                positions.append(t)
+            for t in sorted(positions):
+                poly.append([a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t])
+                parents.append(index)
+
+        old_ids = raw_room.get("wall_ids") if isinstance(raw_room.get("wall_ids"), list) else []
+        indexed_lineage = len(old_ids) == len(original)
+        rigid_delta: tuple[float, float] | None = None
+        rigid_indexed_lineage = indexed_lineage
+        if rigid_indexed_lineage:
+            for index, a in enumerate(original):
+                previous = old.get(old_ids[index])
+                delta = _translated_segment_delta(
+                    a, original[(index + 1) % len(original)], previous,
+                ) if previous else None
+                if delta is None or (rigid_delta is not None and (
+                    abs(delta[0] - rigid_delta[0]) > EPS
+                    or abs(delta[1] - rigid_delta[1]) > EPS
+                )):
+                    rigid_indexed_lineage = False
+                    break
+                rigid_delta = delta
+        wall_keys: list[str] = []
+        for index, a in enumerate(poly):
+            b = poly[(index + 1) % len(poly)]
+            key = _span_key(a, b)
+            atom = atoms_by_key.setdefault(key, {
+                "key": key, "a": _canonical_span(a, b)[0], "b": _canonical_span(a, b)[1],
+                "owners": set(), "preferred": set(), "positional": set(),
+                "preferred_carriers": {},
+                "parent_keys": set(), "zero_wall": False,
+            })
+            atom["owners"].add(room_id)
+            if len(atom["owners"]) > 2:
+                raise WallSegmentMigrationError("third-owner", key)
+            parent_index = parents[index]
+            atom["parent_keys"].add(_wall_key(original[parent_index], original[(parent_index + 1) % len(original)]))
+            midpoint = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2]
+            covered_by = lambda cuts: any(
+                _distance_to_segment(midpoint, cut[:2], cut[2:]) <= GRID_STEP_N * 0.04
+                for cut in cuts
+            )
+            # Canonical cm:0 atoms stay zero; a LEGACY cut spares the atom
+            # that carries an opening (#316 §3.1).
+            atom["zero_wall"] = atom["zero_wall"] or covered_by(canonical_zero_segments) or (
+                covered_by(legacy_segments) and not _atom_carries_opening(a, b)
+            )
+            if indexed_lineage and isinstance(old_ids[parent_index], str) and old_ids[parent_index]:
+                previous = old.get(old_ids[parent_index])
+                if rigid_indexed_lineage or previous is None or _collinear_overlap(
+                    a, b, previous["a"], previous["b"]
+                ) > EPS:
+                    atom["preferred"].add(old_ids[parent_index])
+                else:
+                    atom["positional"].add(old_ids[parent_index])
+                atom["preferred_carriers"][old_ids[parent_index]] = {
+                    "a": list(original[parent_index]),
+                    "b": list(original[(parent_index + 1) % len(original)]),
+                }
+            wall_keys.append(key)
+        next_room = {key: copy.deepcopy(value) for key, value in raw_room.items() if key != "wall_ids"}
+        next_room["poly"] = poly
+        next_room["wall_ids"] = wall_keys
+        next_rooms.append(next_room)
+    return sorted(atoms_by_key.values(), key=lambda atom: atom["key"]), next_rooms
+
+
+def _thickness(space: dict[str, Any], atom: dict[str, Any], previous: dict[str, Any] | None) -> float:
+    if atom.get("zero_wall"):
+        return 0.0
+    candidates: list[float] = []
+    query_key = _wall_key(atom["a"], atom["b"])
+    query_length = _length(atom["a"], atom["b"])
+    for wall in space.get("walls") or []:
+        try:
+            cm = float(wall.get("cm", 0))
+        except (TypeError, ValueError):
+            continue
+        if cm <= 0:
+            continue
+        exact_key = wall.get("key") == query_key or wall.get("key") in atom["parent_keys"]
+        covers = False
+        if isinstance(wall.get("a"), list) and isinstance(wall.get("b"), list):
+            overlap = _collinear_overlap(atom["a"], atom["b"], wall["a"], wall["b"])
+            covers = overlap >= query_length - EPS
+        if exact_key or covers:
+            candidates.append(max(1.0, min(100.0, cm)))
+    unique = {round(value, 9) for value in candidates}
+    if len(unique) > 1:
+        raise WallSegmentMigrationError("thickness-conflict", atom["key"])
+    if candidates:
+        return candidates[0]
+    if previous is not None and float(previous.get("cm", 0)) > 0:
+        return float(previous["cm"])
+    return 0.0
+
+
+def _non_catalog_ids(space: dict[str, Any]) -> set[str]:
+    result: set[str] = set()
+    for name in ("rooms", "openings", "decor", "room_drafts", "partitions", "wall_columns"):
+        for item in space.get(name) or []:
+            if isinstance(item, dict) and isinstance(item.get("id"), str) and item["id"]:
+                result.add(item["id"])
+    for draft in space.get("room_drafts") or []:
+        for segment in draft.get("segments") or []:
+            if isinstance(segment, dict) and isinstance(segment.get("id"), str) and segment["id"]:
+                result.add(segment["id"])
+    return result
+
+
+def _fresh_wall_segment_id(used: set[str]) -> str:
+    for _attempt in range(1000):
+        segment_id = f"wall-{uuid.uuid4()}"
+        if segment_id not in used:
+            return segment_id
+    raise WallSegmentMigrationError("duplicate-id", "id factory exhausted")
+
+
+def _assign_lineage(
+    space: dict[str, Any], atoms: list[dict[str, Any]], old: dict[str, dict],
+    initial_migration: bool,
+) -> None:
+    old_by_key = {_span_key(segment["a"], segment["b"]): segment for segment in old.values()}
+    host_counts: dict[str, int] = {}
+    for opening in space.get("openings") or []:
+        host = opening.get("host") if isinstance(opening, dict) else None
+        if isinstance(host, dict) and host.get("kind") == "wall":
+            host_counts[str(host.get("id"))] = host_counts.get(str(host.get("id")), 0) + 1
+    proposals: dict[str, dict[str, Any]] = {}
+    for atom in atoms:
+        if len(atom["preferred"]) > 1:
+            raise WallSegmentMigrationError("duplicate-id", ",".join(sorted(atom["preferred"])))
+        preferred_id = next(iter(atom["preferred"]), None)
+        preferred = old.get(preferred_id) if preferred_id else None
+        if preferred:
+            proposals[atom["key"]] = preferred
+            continue
+        carrier = atom["preferred_carriers"].get(preferred_id) if preferred_id else None
+        if preferred_id and carrier:
+            proposals[atom["key"]] = {
+                "id": preferred_id, "a": carrier["a"], "b": carrier["b"], "cm": 0,
+            }
+            continue
+        if atom["key"] in old_by_key:
+            proposals[atom["key"]] = old_by_key[atom["key"]]
+            continue
+        overlaps = [segment for segment in old.values()
+                    if _collinear_overlap(atom["a"], atom["b"], segment["a"], segment["b"]) > EPS]
+        overlaps.sort(key=lambda segment: (
+            -host_counts.get(str(segment["id"]), 0),
+            -_length(segment["a"], segment["b"]), str(segment["id"]),
+        ))
+        if overlaps:
+            proposals[atom["key"]] = overlaps[0]
+        elif len(atom["positional"]) == 1:
+            positional = old.get(next(iter(atom["positional"])))
+            if positional:
+                proposals[atom["key"]] = positional
+
+    by_id: dict[str, list[dict[str, Any]]] = {}
+    for atom in atoms:
+        proposal = proposals.get(atom["key"])
+        if proposal:
+            by_id.setdefault(str(proposal["id"]), []).append(atom)
+    for segment_id, candidates in by_id.items():
+        old_segment = old.get(segment_id) or proposals.get(candidates[0]["key"])
+        if old_segment is None:
+            raise WallSegmentMigrationError("duplicate-id", segment_id)
+        midpoint = [
+            (old_segment["a"][0] + old_segment["b"][0]) / 2,
+            (old_segment["a"][1] + old_segment["b"][1]) / 2,
+        ]
+        candidates.sort(key=lambda atom: (
+            0 if _distance_to_segment(midpoint, atom["a"], atom["b"]) <= EPS else 1,
+            0 if _distance_to_segment(old_segment["a"], atom["a"], atom["b"]) <= EPS else 1,
+            atom["key"],
+        ))
+        candidates[0]["id"] = segment_id
+
+    used = _non_catalog_ids(space)
+    for atom in atoms:
+        if not atom.get("id"):
+            continue
+        if atom["id"] in used:
+            raise WallSegmentMigrationError("duplicate-id", atom["id"])
+        used.add(atom["id"])
+    unassigned = [atom for atom in atoms if not atom.get("id")]
+    if initial_migration:
+        seeds: list[tuple[str, str, str, dict[str, Any]]] = []
+        for atom in unassigned:
+            ca, cb = _canonical_span(atom["a"], atom["b"])
+            seed = (f"{space.get('id', '')}|{_point_key(ca)}|{_point_key(cb)}|"
+                    f"{','.join(sorted(atom['owners']))}")
+            digest = base64.b32encode(hashlib.sha256(seed.encode()).digest()).decode().lower()
+            seeds.append((digest, atom["key"], seed, atom))
+        full_digests: dict[str, str] = {}
+        for digest, _key, seed, atom in sorted(seeds):
+            if digest in full_digests and full_digests[digest] != seed:
+                raise WallSegmentMigrationError("duplicate-id", digest)
+            full_digests[digest] = seed
+            base = f"wall-{digest[:20]}"
+            suffix, segment_id = 1, base
+            while segment_id in used:
+                suffix += 1
+                segment_id = f"{base}-{suffix}"
+            atom["id"] = segment_id
+            used.add(segment_id)
+    else:
+        for atom in unassigned:
+            atom["id"] = _fresh_wall_segment_id(used)
+            used.add(atom["id"])
+
+
+def _angle_matches(a: list[float], b: list[float], angle: float) -> bool:
+    dx, dy = _wall_direction(a, b)
+    wall_angle = math.degrees(math.atan2(dy, dx))
+    difference = abs((wall_angle - angle + 90) % 180 - 90)
+    return difference <= 8
+
+
+def _host_openings(
+    space: dict[str, Any], segments: list[dict[str, Any]], initial_migration: bool,
+) -> None:
+    for opening in space.get("openings") or []:
+        host = opening.get("host")
+        if isinstance(host, dict) and host.get("kind") == "partition":
+            continue
+        try:
+            centre = [float(opening["x"]), float(opening["y"])]
+            angle, half = float(opening["angle"]), float(opening["length"]) / 2
+        except (KeyError, TypeError, ValueError):
+            if initial_migration:
+                # #316 §3.4: the initial migration never throws over an opening.
+                opening.pop("host", None)
+                continue
+            raise WallSegmentMigrationError("opening-host", str(opening.get("id", ""))) from None
+
+        def eligible(segment: dict[str, Any]) -> bool:
+            if float(segment.get("cm", 0)) <= 0:
+                return False
+            t = _project_t(centre, segment["a"], segment["b"])
+            span = _length(segment["a"], segment["b"])
+            return (-EPS <= t <= 1 + EPS
+                    and _distance_to_segment(centre, segment["a"], segment["b"])
+                    <= GRID_STEP_N * 0.02
+                    and _angle_matches(segment["a"], segment["b"], angle)
+                    and half >= 0 and t * span - half >= -EPS
+                    and t * span + half <= span + EPS)
+
+        def materialize(carrier: dict[str, Any]) -> None:
+            opening["host"] = {
+                "kind": "wall", "id": carrier["id"],
+                "t": max(0.0, min(1.0, _project_t(centre, carrier["a"], carrier["b"]))),
+            }
+
+        current = None
+        if isinstance(host, dict) and host.get("kind") == "wall":
+            current = next((segment for segment in segments if segment["id"] == host.get("id")), None)
+        candidates = [current] if current is not None and eligible(current) else [
+            segment for segment in segments if eligible(segment)
+        ]
+        if len(candidates) == 1:
+            materialize(candidates[0])
+            continue
+        # #316 §3.3: an unhosted opening is a valid degraded v9 state. A later
+        # write keeps it, may self-heal it, and never fails over it.
+        if host is None and not initial_migration:
+            continue
+        if not initial_migration:
+            raise WallSegmentMigrationError("opening-host", str(opening.get("id", "")))
+
+        def pick(pool: list[dict[str, Any]]) -> dict[str, Any] | None:
+            if not pool:
+                return None
+            if current is not None and any(item is current for item in pool):
+                return current
+            return sorted(pool, key=lambda segment: (
+                _distance_to_segment(centre, segment["a"], segment["b"]),
+                -float(segment.get("cm", 0)),
+                str(segment.get("id", "")),
+            ))[0]
+
+        # #316 §3.2 tie-break. No distant fallback pool (CODE-REVIEW-316-r1
+        # H1): a host away from the opening's own x/y would violate the
+        # geometry-match invariant of CONFIG_SCHEMA and wedge the write on the
+        # schema layer; without an in-place carrier the opening goes straight
+        # to the unhosted degraded state.
+        carrier = pick([segment for segment in segments if eligible(segment)])
+        if carrier is not None:
+            materialize(carrier)
+        else:
+            opening.pop("host", None)
+
+
+def _migrate_space(space: dict[str, Any], initial_migration: bool) -> int:
+    old: dict[str, dict[str, Any]] = {}
+    for segment in space.get("wall_segments") or []:
+        segment_id = str(segment.get("id", ""))
+        if not segment_id or segment_id in old:
+            raise WallSegmentMigrationError("duplicate-id", segment_id)
+        old[segment_id] = segment
+    atoms, rooms = _atomize(space, old)
+    _assign_lineage(space, atoms, old, initial_migration)
+    segments = []
+    for atom in atoms:
+        previous = old.get(atom["id"])
+        segment = copy.deepcopy(previous) if previous else {}
+        segment.update({
+            "id": atom["id"], "a": list(atom["a"]), "b": list(atom["b"]),
+            "cm": _thickness(space, atom, previous),
+        })
+        segments.append(segment)
+    id_by_key = {atom["key"]: atom["id"] for atom in atoms}
+    for room in rooms:
+        room["wall_ids"] = [id_by_key[key] for key in room["wall_ids"]]
+    space["rooms"] = rooms
+    space["wall_segments"] = segments
+    walls = [{
+        "key": _wall_key(segment["a"], segment["b"]),
+        "cm": segment["cm"], "a": list(segment["a"]), "b": list(segment["b"]),
+    } for segment in segments if float(segment["cm"]) > 0]
+    if walls:
+        space["walls"] = walls
+    else:
+        space.pop("walls", None)
+    space.pop("open_spans", None)
+    for room in space.get("rooms") or []:
+        room.pop("open_to", None)
+    draft_used = {
+        str(item["id"])
+        for name in ("rooms", "openings", "decor", "room_drafts", "partitions",
+                     "wall_columns", "wall_segments")
+        for item in space.get(name) or []
+        if isinstance(item, dict) and isinstance(item.get("id"), str) and item["id"]
+    }
+    for draft in space.get("room_drafts") or []:
+        for index, segment in enumerate(draft.get("segments") or []):
+            if isinstance(segment.get("id"), str) and segment["id"]:
+                if segment["id"] in draft_used:
+                    raise WallSegmentMigrationError("duplicate-id", segment["id"])
+                draft_used.add(segment["id"])
+                continue
+            try:
+                a, b = draft["points"][index], draft["points"][index + 1]
+            except (KeyError, IndexError, TypeError):
+                raise WallSegmentMigrationError("zero-length", str(draft.get("id", ""))) from None
+            if initial_migration:
+                base = deterministic_wall_segment_id(
+                    str(space.get("id", "")), a, b, [f"draft:{draft.get('id', '')}"],
+                )
+                suffix, segment["id"] = 1, base
+                while segment["id"] in draft_used:
+                    suffix += 1
+                    segment["id"] = f"{base}-{suffix}"
+            else:
+                segment["id"] = _fresh_wall_segment_id(draft_used)
+            draft_used.add(segment["id"])
+    _host_openings(space, segments, initial_migration)
+    return sum(1 for segment in segments if segment["id"] not in old)
+
+
+def commit_wall_segment_model(config: Any) -> tuple[Any, int]:
+    """Return one migrated deep copy and the count of newly assigned wall ids."""
+    candidate = canonicalize_config_geometry(copy.deepcopy(config))
+    if not isinstance(candidate, dict):
+        raise WallSegmentMigrationError("invalid-room")
+    migrated = 0
+    initial_migration = int(candidate.get("model_version", 0) or 0) < WALL_SEGMENT_MODEL_VERSION
+    for space in candidate.get("spaces") or []:
+        migrated += _migrate_space(space, initial_migration)
+    candidate["model_version"] = WALL_SEGMENT_MODEL_VERSION
+    return canonicalize_config_geometry(candidate), migrated
@@ -24,6 +24,7 @@ from .const import (
    CONTENT_URL, FILES_DIR, MAX_PLANS_BYTES, MAX_PLANS_FILES, MAX_PLANS_LISTED,
    MAX_SIGN_PATHS,
    PLANS_DIR, PLANS_URL,
+    VERSION,
 )
 from .coordinate_canonicalization import (
    canonicalize_config_geometry,
@@ -60,13 +61,20 @@ from .virtual_lights import (
 )
 from .registry_snapshot import import_registry_snapshot
 from .projection import project_config, project_layout
+from .wall_segment_model import (
+    WALL_SEGMENT_MODEL_VERSION,
+    WallSegmentMigrationError,
+    commit_wall_segment_model,
+)
+from .junction_limits import JunctionLimitError, validate_junction_limits
 from .validation import (
    CONFIG_SCHEMA, LAYOUT_SCHEMA, MAX_CONFIG_BYTES, MAX_PLAN_BYTES,
    PLAN_EXTENSIONS, POS_SCHEMA, MarkerControlError, OpeningPassageError,
-    PartitionOpeningHostError, PartitionOpeningJambMarginError, sanitize_filename,
+    PartitionOpeningHostError, PartitionOpeningJambMarginError,
+    WallModelClientOutdatedError, sanitize_filename,
    validate_opening_passages, validate_partition_opening_hosts,
    validate_marker_controls, validate_marker_light_entities,
-    validate_marker_value_badges, valid_space_id,
+    validate_marker_value_badges, validate_wall_model_transition, valid_space_id,
 )


@@ -485,24 +493,14 @@ async def ws_import_apply(hass: HomeAssistant, connection, msg: dict[str, Any])

    hass.bus.async_fire("houseplan_config_updated", {"rev": new_config_rev})
    hass.bus.async_fire("houseplan_layout_updated", {"rev": new_layout_rev})
-    _refresh_trail_recorder(hass)
    if kind == "full":
-        recorder = hass.data.get(DOMAIN, {}).get("trail_recorder")
-        live_marker_ids = {
-            str(marker.get("id")) for marker in target_config.get("markers") or []
-        }
-        if recorder is not None:
-            for marker_id in list(getattr(getattr(recorder, "book", None), "data", {})):
-                if marker_id not in live_marker_ids:
-                    try:
-                        await recorder.async_delete(marker_id)
-                    except Exception:  # noqa: BLE001
-                        _LOGGER.exception("House Plan: removing orphan import trail failed")
+        await _purge_trail_recorder(hass, target_config)
        entry = get_entry(hass)
        if entry is not None:
            from .repairs import async_check_plan_files

            hass.async_create_task(async_check_plan_files(hass, entry))
+    _refresh_trail_recorder(hass)
    connection.send_result(msg["id"], {
        "ok": True,
        "kind": kind,
@@ -1151,6 +1149,9 @@ async def ws_config_get(hass: HomeAssistant, connection, msg: dict[str, Any]) ->
            "can_write": may_write(hass, getattr(connection, "user", None)),
            "can_optimize_undo": _optimizer_backup_is_current(data, layout_data),
            "undo_kind": _undo_kind(data, layout_data),
+            # #295: the card compares this against its own version to decide
+            # whether the «update House Plan» preflight hint can actually help.
+            "integration_version": VERSION,
        },
    )

@@ -1259,7 +1260,9 @@ def _missing_internal_attachments(
@websocket_api.websocket_command(
    {
        vol.Required("type"): "houseplan/config/set",
-        vol.Required("config"): CONFIG_SCHEMA,
+        # Semantic stale-client detection needs the stored v8 document and
+        # therefore runs inside the write lock before CONFIG_SCHEMA.
+        vol.Required("config"): dict,
        vol.Optional("expected_rev"): int,
    }
 )
@@ -1291,14 +1294,22 @@ async def ws_config_set(hass: HomeAssistant, connection, msg: dict[str, Any]) ->
        data = await rt.config_store.async_load() or {}
        current_rev = data.get("rev", 0)
        if "expected_rev" not in msg and current_rev:
-            # audit B4: expected_rev stays optional for old cards mid-upgrade,
-            # but a blind overwrite of a non-empty store is worth a warning —
-            # it is exactly how a stale client silently discards someone's work.
+            # #340: a request without the revision it read is indistinguishable
+            # from a stale writer.  Keep the schema field optional only for an
+            # empty-store bootstrap and so this path can return the same stable
+            # domain error as an explicit stale revision.  Accepting it over a
+            # saved document would bypass optimistic locking entirely.
            _LOGGER.warning(
                "House Plan: config/set without expected_rev over rev %s — "
-                "the client bypasses conflict detection (outdated card?)",
+                "write rejected (outdated client?)",
                current_rev,
            )
+            connection.send_error(
+                msg["id"], "conflict",
+                f"Configuration revision is required; reload the configuration "
+                f"(current rev {current_rev})",
+            )
+            return
        if "expected_rev" in msg and msg["expected_rev"] != current_rev:
            connection.send_error(
                msg["id"], "conflict",
@@ -1308,18 +1319,41 @@ async def ws_config_set(hass: HomeAssistant, connection, msg: dict[str, Any]) ->
        # Marker-to-marker light links are a semantic graph layered on top of
        # the lossless controls array. Validate only edges introduced by this
        # write so an unrelated edit can still round-trip a legacy broken ref.
-        try:
+        # #330 §4.1/§4.2: the CPU part of validation runs in the executor —
+        # schema + semantic validators cost seconds on a large plan and the
+        # event loop must not carry that (HA guideline: >50 ms). write_lock
+        # is still held across the await: writes stay serialised, only the
+        # loop is freed. The junction baseline of the STORED document is
+        # cached by rev, so a repeated write does not re-judge `previous`.
+        baseline = rt.junction_baseline
+        baseline_counts = baseline[1] if baseline and baseline[0] == current_rev else None
+
+        def _validate_config_cpu():
+            validate_wall_model_transition(msg["config"], data.get("config"))
+            checked = CONFIG_SCHEMA(msg["config"])
+            msg["config"].clear()
+            msg["config"].update(checked)
            validate_marker_controls(msg["config"], data.get("config"))
            validate_marker_light_entities(msg["config"], data.get("config"))
            validate_marker_value_badges(msg["config"], data.get("config"))
            validate_opening_passages(msg["config"], data.get("config"))
            validate_partition_opening_hosts(msg["config"], data.get("config"))
+            return validate_junction_limits(
+                msg["config"], data.get("config"),
+                baseline_counts=baseline_counts,
+            )
+        try:
+            candidate_counts = await hass.async_add_executor_job(_validate_config_cpu)
        except (
-            MarkerControlError, OpeningPassageError, PartitionOpeningHostError,
-            PartitionOpeningJambMarginError,
+            JunctionLimitError, MarkerControlError, OpeningPassageError,
+            PartitionOpeningHostError, PartitionOpeningJambMarginError,
+            WallModelClientOutdatedError,
        ) as err:
            connection.send_error(msg["id"], err.code, str(err))
            return
+        except vol.Invalid as err:
+            connection.send_error(msg["id"], "invalid_format", str(err))
+            return
        # An internal plan url must name a file that exists. The card can pick a
        # plan and then delete it from the same dialog, and two clients can do
        # the same thing in either order — the lock serialises them but says
@@ -1355,6 +1389,9 @@ async def ws_config_set(hass: HomeAssistant, connection, msg: dict[str, Any]) ->
            new_rev,
            previous_rev=int(current_rev),
        )
+        # The candidate just became the stored document: its counts are the
+        # next write's baseline (#330 §4.2).
+        rt.junction_baseline = (int(new_rev), candidate_counts)
        try:
            await _discard_optimizer_snapshot(rt)
        except Exception:  # noqa: BLE001 — stale backup cleanup is best-effort
@@ -1373,6 +1410,11 @@ async def ws_config_set(hass: HomeAssistant, connection, msg: dict[str, Any]) ->
            await hass.async_add_executor_job(_collect)
        except Exception:  # noqa: BLE001 — see above: the commit stands regardless
            _LOGGER.exception("House Plan: collecting superseded files failed")
+        # The config is already durable, so trail cleanup is best-effort and
+        # cannot turn this accepted write into a retryable client failure.
+        # Keep it under write_lock: a later config/set must not resurrect a
+        # marker between this commit and the ownership decision (#335).
+        await _purge_trail_recorder(hass, msg["config"])
    hass.bus.async_fire("houseplan_config_updated", {"rev": new_rev})
    _refresh_trail_recorder(hass)
    # refresh repair issues (broken plan references) without waiting for a restart
@@ -1577,7 +1619,7 @@ async def ws_space_delete(hass: HomeAssistant, connection, msg: dict[str, Any])
@websocket_api.websocket_command(
    {
        vol.Required("type"): "houseplan/plan/optimize",
-        vol.Required("config"): CONFIG_SCHEMA,
+        vol.Required("config"): dict,
        vol.Required("layout"): LAYOUT_SCHEMA,
        vol.Required("expected_config_rev"): int,
        vol.Required("expected_layout_rev"): int,
@@ -1621,7 +1663,34 @@ async def ws_plan_optimize(hass: HomeAssistant, connection, msg: dict[str, Any])
        # Optimization is a normal configuration write with an additional
        # layout transaction. It must enforce the same marker-link semantics
        # as config/set; otherwise a crafted client can persist a new cycle.
-        try:
+        # #330 §4.1: the same executor treatment as config/set — Optimize
+        # carries schema + a possible full migration, the costliest CPU path
+        # of all writers, and it used to run on the event loop.
+        def _validate_optimize_cpu():
+            validate_wall_model_transition(msg["config"], config_data.get("config"))
+            try:
+                submitted_model = int(msg["config"].get("model_version", 0) or 0)
+            except (TypeError, ValueError):
+                submitted_model = WALL_SEGMENT_MODEL_VERSION
+            # Optimize is an explicit structural writer and therefore the
+            # server-side v7 -> v8 barrier as well. Current v8 candidates are
+            # validated verbatim: the backend must never invent lineage for a
+            # graph already authored by a current client.
+            candidate_config = CONFIG_SCHEMA(msg["config"])
+            # Keep the established public validation contract ahead of the
+            # structural migration barrier. A malformed passage can also make
+            # wall-host materialisation impossible, but callers must still get
+            # the actionable `invalid_passage_fields` code rather than the
+            # generic wall-model blocker.
+            validate_opening_passages(candidate_config, config_data.get("config"))
+            if submitted_model < WALL_SEGMENT_MODEL_VERSION:
+                candidate_config, _ = commit_wall_segment_model(candidate_config)
+            checked = CONFIG_SCHEMA(candidate_config)
+            migrated_size = len(json.dumps(checked, separators=(",", ":")))
+            if migrated_size > MAX_CONFIG_BYTES:
+                return None, migrated_size
+            msg["config"].clear()
+            msg["config"].update(checked)
            validate_marker_controls(msg["config"], config_data.get("config"))
            validate_marker_light_entities(msg["config"], config_data.get("config"))
            validate_marker_value_badges(msg["config"], config_data.get("config"))
@@ -1630,12 +1699,38 @@ async def ws_plan_optimize(hass: HomeAssistant, connection, msg: dict[str, Any])
                msg["config"], config_data.get("config"),
                allow_optimize_rehost=True,
            )
+            # #333: Optimize is a normal configuration write for the junction
+            # limits too — an honest client's optimization never ADDS a
+            # violation (#329 AC10), so this gate is a no-op for legitimate
+            # flows and refuses only a crafted payload that used this command
+            # as a side door around config/set. Inheritance is counted per
+            # rule exactly as in config/set: repairing a legacy plan that
+            # already carries violations still passes.
+            return validate_junction_limits(
+                msg["config"], config_data.get("config"),
+            ), None
+        try:
+            optimize_counts, oversize = await hass.async_add_executor_job(
+                _validate_optimize_cpu,
+            )
+            if oversize is not None:
+                connection.send_error(
+                    msg["id"], "too_large",
+                    f"Configuration is {oversize // 1024} KB, "
+                    f"the limit is {MAX_CONFIG_BYTES // 1024} KB",
+                )
+                return
        except (
-            MarkerControlError, OpeningPassageError, PartitionOpeningHostError,
-            PartitionOpeningJambMarginError,
+            JunctionLimitError, MarkerControlError, OpeningPassageError,
+            PartitionOpeningHostError, PartitionOpeningJambMarginError,
+            WallModelClientOutdatedError,
+            WallSegmentMigrationError,
        ) as err:
            connection.send_error(msg["id"], err.code, str(err))
            return
+        except vol.Invalid as err:
+            connection.send_error(msg["id"], "invalid_format", str(err))
+            return

        missing = await hass.async_add_executor_job(
            _missing_internal_plans,
@@ -1684,6 +1779,11 @@ async def ws_plan_optimize(hass: HomeAssistant, connection, msg: dict[str, Any])
            new_config_rev,
            previous_rev=config_rev,
        )
+        # The optimized candidate is now the stored document: its junction
+        # counts are the next write's baseline (#333 AC3, symmetric with
+        # config/set — otherwise the next save re-judges `previous` for
+        # nothing and the #330 cache loses its point).
+        rt.junction_baseline = (int(new_config_rev), optimize_counts or {})
        await async_save_layout_state(
            rt, layout_data, msg["layout"], new_layout_rev,
            metadata={_OPTIMIZE_BACKUP: backup},
@@ -1770,24 +1870,14 @@ async def ws_plan_optimize_undo(hass: HomeAssistant, connection, msg: dict[str,

    hass.bus.async_fire("houseplan_config_updated", {"rev": new_config_rev})
    hass.bus.async_fire("houseplan_layout_updated", {"rev": new_layout_rev})
-    _refresh_trail_recorder(hass)
    if restored_kind == "import":
-        recorder = hass.data.get(DOMAIN, {}).get("trail_recorder")
-        live_marker_ids = {
-            str(marker.get("id")) for marker in restored_config.get("markers") or []
-        }
-        if recorder is not None:
-            for marker_id in list(getattr(getattr(recorder, "book", None), "data", {})):
-                if marker_id not in live_marker_ids:
-                    try:
-                        await recorder.async_delete(marker_id)
-                    except Exception:  # noqa: BLE001
-                        _LOGGER.exception("House Plan: removing orphan undo trail failed")
+        await _purge_trail_recorder(hass, restored_config)
        entry = get_entry(hass)
        if entry is not None:
            from .repairs import async_check_plan_files

            hass.async_create_task(async_check_plan_files(hass, entry))
+    _refresh_trail_recorder(hass)
    connection.send_result(msg["id"], {
        "ok": True,
        "config_rev": new_config_rev,
@@ -1871,6 +1961,12 @@ def _refresh_trail_recorder(hass: HomeAssistant) -> None:
        hass.async_create_task(rec.async_refresh())


+async def _purge_trail_recorder(hass: HomeAssistant, config: dict[str, Any]) -> int:
+    """Reconcile durable trails with the live marker set after a config commit."""
+    rec = hass.data.get(DOMAIN, {}).get("trail_recorder")
+    return await rec.async_purge_orphans(config) if rec else 0
+
+
@websocket_api.websocket_command({vol.Required("type"): "houseplan/trail/get"})
@websocket_api.async_response
 async def ws_trail_get(hass: HomeAssistant, connection: websocket_api.ActiveConnection, msg: dict) -> None:
@@ -87,7 +87,7 @@ const viewport = { width: 1280, height: 900 };
 const { page, browser } = await launch(
  viewport, 1,
  ['--enable-precise-memory-info', '--js-flags=--expose-gc'],
-  {}, resolve(targetRoot, 'demo/srv'),
+  {}, resolve(targetRoot, 'demo/srv'), targetRoot,
 );
 await page.addScriptTag({
  content: `window.__hpAssertCardContract = ${assertCardContract.toString()};`,
@@ -0,0 +1,169 @@
+/**
+ * #330 §5: the performance contract of the junction limits (#329).
+ *
+ * Guards the CLASS of regression — a quadratic path returning — not runner
+ * noise: budgets are 2-3x the measured post-fix numbers. Measures the exact
+ * code the write barrier runs: the pure П1-П5 checks over a 576-atom plan
+ * (the S2 reproduction grid of #330), for both mirrors. The python half runs
+ * through a child process with the real custom_components module.
+ *
+ * Runs on test-build/ like benchmark:wall-model — no browser, no bundle.
+ */
+import { spawnSync } from 'node:child_process';
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
+
+import {
+  checkNodes, checkSegmentLengths, checkNodeDistances, checkRoomClearance,
+  cmToUnits,
+} from '../test-build/junction-limits.js';
+import { commitWallSegmentModel } from '../test-build/wall-segment-model.js';
+import { GRID_STEP_N } from '../test-build/space-geometry.js';
+import {
+  innerContourForRoom, multiWallNodesForGeometry, wallBodiesGeometry,
+} from '../test-build/wall-thickness.js';
+
+const REPO_ROOT = dirname(dirname(fileURLToPath(import.meta.url)));
+const CELL = 5;
+const GRID_N = 12; // 576 contour atoms — the #330 S2 grid
+const WARMUPS = 2;
+const SAMPLES = 5;
+
+// Budgets are calibrated from the SLOWEST machine observed, not the
+// author's: the CI review runner measured tsFullCandidateMs at 169-171 ms
+// where the dev sandbox saw 88 (code-review 330-r1 H2). Each budget keeps
+// the spec's 2-3x allowance over that worst observation, so the bench turns
+// red for the O(n²) class (which costs seconds), not for a slower runner.
+const BUDGETS = {
+  tsSegmentLengthsMs: 60,
+  tsNodeDistancesMs: 80,
+  tsFullCandidateMs: 400,
+  pyWarmValidateMs: 300,
+  pyColdValidateMs: 5000,
+};
+
+const u = (cm) => cmToUnits(cm, CELL, GRID_STEP_N);
+const rooms = []; const walls = []; let k = 0;
+for (let i = 0; i < GRID_N; i++) {
+  for (let j = 0; j < GRID_N; j++) {
+    const x0 = u(310) * i; const y0 = u(310) * j;
+    const poly = [[x0, y0], [x0 + u(300), y0], [x0 + u(300), y0 + u(300)], [x0, y0 + u(300)]];
+    rooms.push({ id: `r${i}-${j}`, name: `r${i}${j}`, area: null, poly });
+    for (let e = 0; e < 4; e++) {
+      walls.push({ key: `w${k++}`, a: poly[e], b: poly[(e + 1) % 4], cm: 15 });
+    }
+  }
+}
+const legacy = {
+  spaces: [{
+    id: 's', title: 's', cell_cm: CELL, view_box: [0, 0, 1, 1],
+    rooms, walls, openings: [], room_drafts: [], partitions: [], wall_columns: [],
+  }],
+  markers: [], settings: {},
+};
+const { config: v9 } = commitWallSegmentModel(JSON.parse(JSON.stringify(legacy)));
+const space = v9.spaces[0];
+const segments = (space.wall_segments || []).map((item) => ({
+  id: item.id, a: item.a, b: item.b, cm: Number(item.cm),
+}));
+
+/** The same П1-П5 set the card's write barrier computes for one candidate. */
+const fullCandidate = () => {
+  const violations = [
+    ...checkNodes(segments),
+    ...checkSegmentLengths(segments, CELL, GRID_STEP_N),
+    ...checkNodeDistances(segments, CELL, GRID_STEP_N),
+  ];
+  // #330 §4.7: shared passes exactly as the card computes them.
+  const sharedNodes = multiWallNodesForGeometry(
+    space.rooms || [], space.walls || [], [], GRID_STEP_N, CELL, GRID_STEP_N, 1,
+  );
+  let sharedRoomGeometry;
+  if (sharedNodes.nodes.length) {
+    const geometry = wallBodiesGeometry(
+      space.rooms || [], space.walls || [], [], [], GRID_STEP_N, CELL, GRID_STEP_N, 1,
+    );
+    sharedRoomGeometry = geometry?.status === 'ok' || geometry?.status === 'degraded-extra'
+      ? geometry.roomGeom : undefined;
+  }
+  for (const room of space.rooms || []) {
+    let inner = null;
+    try {
+      inner = innerContourForRoom(
+        space.rooms || [], String(room.id), space.walls || [], [],
+        GRID_STEP_N, CELL, GRID_STEP_N, 1, sharedRoomGeometry, sharedNodes,
+      );
+    } catch { inner = null; }
+    violations.push(...checkRoomClearance(String(room.id), inner, CELL, GRID_STEP_N));
+  }
+  return violations.length;
+};
+
+const median = (fn) => {
+  for (let i = 0; i < WARMUPS; i++) fn();
+  const times = [];
+  for (let i = 0; i < SAMPLES; i++) {
+    const start = performance.now();
+    fn();
+    times.push(performance.now() - start);
+  }
+  times.sort((left, right) => left - right);
+  return times[Math.floor(times.length / 2)];
+};
+
+const tsSegmentLengthsMs = median(() => checkSegmentLengths(segments, CELL, GRID_STEP_N));
+const tsNodeDistancesMs = median(() => checkNodeDistances(segments, CELL, GRID_STEP_N));
+const tsFullCandidateMs = median(fullCandidate);
+
+// Python mirror: cold (legacy both sides) and warm (v9 + baseline counts).
+const pyScript = `
+import importlib.util, sys, types, os, json, time
+root = ${JSON.stringify(REPO_ROOT)}
+pr = os.path.join(root, 'custom_components'); hr = os.path.join(pr, 'houseplan')
+pkg = types.ModuleType('custom_components'); pkg.__path__ = [pr]; sys.modules['custom_components'] = pkg
+p2 = types.ModuleType('custom_components.houseplan'); p2.__path__ = [hr]; sys.modules['custom_components.houseplan'] = p2
+spec = importlib.util.spec_from_file_location('custom_components.houseplan.junction_limits', os.path.join(hr, 'junction_limits.py'))
+jl = importlib.util.module_from_spec(spec); sys.modules[spec.name] = jl; spec.loader.exec_module(jl)
+legacy = json.load(sys.stdin)
+from custom_components.houseplan.wall_segment_model import commit_wall_segment_model
+v9, _ = commit_wall_segment_model(json.loads(json.dumps(legacy)))
+prev = json.loads(json.dumps(v9)); cand = json.loads(json.dumps(v9))
+cand['spaces'][0]['rooms'][0]['name'] = 'x'
+t0 = time.perf_counter()
+jl.validate_junction_limits(json.loads(json.dumps(legacy)), json.loads(json.dumps(legacy)))
+cold = 1000 * (time.perf_counter() - t0)
+counts = jl.validate_junction_limits(json.loads(json.dumps(cand)), json.loads(json.dumps(prev)))
+best = None
+for _ in range(3):
+    t0 = time.perf_counter()
+    jl.validate_junction_limits(json.loads(json.dumps(cand)), None, baseline_counts=counts)
+    warm = 1000 * (time.perf_counter() - t0)
+    best = warm if best is None else min(best, warm)
+print(json.dumps({'pyColdValidateMs': cold, 'pyWarmValidateMs': best}))
+`;
+const python = process.env.PYTHON || (process.platform === 'win32' ? 'python' : 'python3');
+const pyRun = spawnSync(python, ['-c', pyScript], {
+  input: JSON.stringify(legacy), encoding: 'utf8', maxBuffer: 64 * 1024 * 1024,
+});
+if (pyRun.status !== 0) {
+  console.error('python mirror failed:', (pyRun.stderr || '').slice(-2000));
+  process.exit(1);
+}
+const py = JSON.parse(pyRun.stdout.trim().split('\n').pop());
+
+const results = {
+  tsSegmentLengthsMs, tsNodeDistancesMs, tsFullCandidateMs,
+  pyWarmValidateMs: py.pyWarmValidateMs, pyColdValidateMs: py.pyColdValidateMs,
+};
+const pass = Object.entries(BUDGETS).every(([name, budget]) => results[name] <= budget);
+console.log(JSON.stringify({
+  issue: 330,
+  fixture: { atoms: segments.length, grid: `${GRID_N}x${GRID_N}` },
+  warmups: WARMUPS, samples: SAMPLES,
+  results: Object.fromEntries(Object.entries(results).map(
+    ([name, value]) => [name, Math.round(value * 10) / 10],
+  )),
+  budgets: BUDGETS,
+  pass,
+}, null, 2));
+if (!pass) process.exitCode = 1;
@@ -43,6 +43,7 @@ const { page, browser } = await launch(
  ['--enable-precise-memory-info', '--js-flags=--expose-gc'],
  {},
  resolve(targetRoot, 'demo/srv'),
+  targetRoot,
 );
 await page.emulateMedia({ reducedMotion: 'reduce' });
 await page.addStyleTag({
@@ -345,7 +346,7 @@ try {
          target: null,
        };
        card._rszEdgeDown(quietEvent, room.id, 1);
-        const plan = card._rszDrag?.plan;
+        const plan = card._resize?.plan;
        if (!plan) throw new Error('large-house resize plan was not created');
        const target = [
          plan.a[0] + plan.n[0] * card._gridPitch,
@@ -1,5 +1,6 @@
-import { existsSync } from 'node:fs';
-import { resolve } from 'node:path';
+import { createHash } from 'node:crypto';
+import { existsSync, readFileSync } from 'node:fs';
+import { relative, resolve } from 'node:path';
 import { pathToFileURL } from 'node:url';
 import { sourceFingerprint } from '../scripts/source-fingerprint.mjs';

@@ -13,17 +14,39 @@ const fingerprintForTree = async (root) => {
  return module.sourceFingerprint(root);
 };

+const verifyManifestTree = (root, expected) => {
+  const assetRoot = resolve(root, 'demo/srv/assets');
+  const manifestPath = resolve(assetRoot, 'houseplan-assets.json');
+  // Comparative benchmarks can target releases from before the multi-asset
+  // contract. Their own embedded fingerprint remains the legacy authority.
+  if (!existsSync(manifestPath)) return;
+  const manifest = JSON.parse(readFileSync(manifestPath, 'utf8'));
+  if (manifest?.schema !== 1 || manifest.fingerprint !== expected
+      || !Array.isArray(manifest.files)) {
+    throw new Error('demo bundle manifest is stale or malformed; run npm run bundle:sync');
+  }
+  for (const file of manifest.files) {
+    const path = resolve(assetRoot, String(file?.path || ''));
+    const rel = relative(assetRoot, path);
+    if (!rel || rel.startsWith('..') || rel.includes(':') || !existsSync(path)) {
+      throw new Error(`demo bundle manifest asset is missing or unsafe: ${file?.path}`);
+    }
+    const hash = createHash('sha256').update(readFileSync(path)).digest('hex');
+    if (hash !== file.sha256) throw new Error(`demo bundle asset hash mismatch: ${file.path}`);
+  }
+};
+
 /** Refuse measurements/screenshots made by a committed bundle from old source. */
 export async function assertFreshDemoBundle(page, root = process.cwd()) {
  // A comparative performance run may load an older tree whose fingerprint
  // contract is intentionally different from the candidate's. Validate that
  // tree with the implementation that built it, not with today's algorithm.
  const expected = await fingerprintForTree(root);
+  verifyManifestTree(root, expected);
  const loaded = await page.evaluate(() => globalThis.__HOUSEPLAN_BUILD_FINGERPRINT__ ?? null);
  if (loaded !== expected) {
    throw new Error(
-      'demo/srv/assets/houseplan-card.js is stale. Run npm run build and copy '
-      + 'dist/houseplan-card.js to demo/srv/assets/houseplan-card.js first. '
+      'demo/srv/assets bundle tree is stale. Run npm run bundle:sync first. '
      + `Expected ${expected}, loaded ${loaded || 'no fingerprint'}.`,
    );
  }
@@ -1,8 +1,13 @@
 #!/usr/bin/env node
 import { createHash } from 'node:crypto';
-import { copyFileSync, mkdirSync, readFileSync, writeFileSync } from 'node:fs';
+import { spawnSync } from 'node:child_process';
+import { mkdirSync, readFileSync, writeFileSync } from 'node:fs';
 import { dirname, resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
+// #337: a clean CI checkout has no ignored demo bundle. Materialize the whole
+// manifest-owned tree before launching Chromium; copying only the stable entry
+// leaves every content-hashed import at 404.
+import '../../scripts/bundle-sync.mjs';
 import { visualFingerprint } from '../../scripts/source-fingerprint.mjs';
 import { assertFreshDemoBundle } from '../bundle-freshness.mjs';
 import { goldenClip, prepareGoldenScenario } from '../golden/harness.mjs';
@@ -11,12 +16,50 @@ import { DOC_SCREENSHOT_VERSION, DOC_SCREENSHOTS } from './screenshots.mjs';

 const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), '../..');
 const OUTPUT = resolve(ROOT, 'docs/images');
-const BUNDLE = resolve(ROOT, 'dist/houseplan-card.js');
-const DEMO_BUNDLE = resolve(ROOT, 'demo/srv/assets/houseplan-card.js');
-const INTEGRATION_BUNDLE = resolve(ROOT, 'custom_components/houseplan/frontend/houseplan-card.js');
 const SCRIPT = fileURLToPath(import.meta.url);
 const sha256 = (value) => createHash('sha256').update(value).digest('hex');

+/**
+ * Перепаковка кадра без потерь (#345).
+ *
+ * Замер на этом наборе: 2096 КБ превращаются в 1689 КБ, минус 19.4%, и все
+ * десять кадров остаются ПИКСЕЛЬНО идентичными — декодированные RGBA совпадают
+ * по sha256. Это выбор фильтров строки и уровня сжатия, а не квантование:
+ * визуального решения здесь нет вовсе.
+ *
+ * Почему внутри съёмки, а не отдельным проходом по закоммиченным файлам.
+ * Манифест хранит `imageSha256` каждого кадра, поэтому оптимизировать файлы в
+ * репозитории руками нельзя — `check-docs` покраснеет; а если жать после
+ * подсчёта хешей, следующая же съёмка вернёт неоптимизированные байты.
+ *
+ * Отсутствие инструмента не ошибка: локальная съёмка и без него полезна для
+ * глаз, а приёмка всё равно идёт только из артефакта CI, где `oxipng` стоит
+ * пином (`.github/workflows/docs-screenshots.yml`). Но молчать об этом нельзя —
+ * байты кадра зависят от того, был ли инструмент, поэтому его версия попадает
+ * в манифест рядом с версией браузера, по той же причине.
+ */
+const oxipngVersion = (() => {
+  const probe = spawnSync('oxipng', ['--version'], { encoding: 'utf8' });
+  if (probe.status !== 0) {
+    console.log('oxipng не найден: кадры пишутся как есть, без перепаковки');
+    return null;
+  }
+  return String(probe.stdout || '').trim().split('\n')[0];
+})();
+
+/** Пожать файл на месте и вернуть его новые байты. */
+const shrinkPng = (path, before) => {
+  if (!oxipngVersion) return before;
+  const run = spawnSync('oxipng', ['-o', '4', '--strip', 'safe', '--quiet', path]);
+  if (run.status !== 0) {
+    throw new Error(`oxipng не смог обработать ${path}: код ${run.status}`
+      + `${run.stderr ? ` · ${run.stderr}` : ''}`);
+  }
+  const after = readFileSync(path);
+  console.log(`  ${(before.length / 1024).toFixed(0)} КБ -> ${(after.length / 1024).toFixed(0)} КБ`);
+  return after;
+};
+

 const roomCardClip = (page) => page.evaluate(() => {
  const card = window.__goldenCard;
@@ -103,8 +146,6 @@ const applyDocumentationState = (page, scenario) => page.evaluate(async (current
 }, scenario);

 mkdirSync(OUTPUT, { recursive: true });
-copyFileSync(BUNDLE, DEMO_BUNDLE);
-copyFileSync(BUNDLE, INTEGRATION_BUNDLE);

 const { page, browser } = await launch();
 const browserErrors = [];
@@ -129,14 +170,18 @@ try {
    const image = await page.screenshot({
      ...(clip ? { clip } : {}), animations: 'disabled', caret: 'hide', scale: 'css',
    });
-    writeFileSync(resolve(OUTPUT, scenario.file), image);
+    const imagePath = resolve(OUTPUT, scenario.file);
+    writeFileSync(imagePath, image);
+    // Хеш считается ПОСЛЕ перепаковки: манифест обязан описывать те байты,
+    // которые лежат на диске, иначе приёмка отвергнет свой же кандидат.
+    const stored = shrinkPng(imagePath, image);
    scenarios[scenario.id] = {
      file: scenario.file,
      viewport: scenario.viewport,
      theme: scenario.theme,
      language: scenario.language,
      sourceSha256: fingerprint,
-      imageSha256: sha256(image),
+      imageSha256: sha256(stored),
    };
    console.log(`captured ${scenario.id} -> docs/images/${scenario.file}`);
  }
@@ -147,6 +192,8 @@ try {
    // Кто снимал. Смена браузера переписывает все картинки без содержательных
    // изменений (#246), поэтому окружение съёмки — часть доказательства.
    chromium: browser.version(),
+    // Чем жали — тоже часть доказательства: без инструмента байты другие.
+    oxipng: oxipngVersion,
    sourceFingerprint: fingerprint,
    captureScriptSha256: sha256(readFileSync(SCRIPT)),
    command: 'npm run build && node demo/docs/capture.mjs',
@@ -0,0 +1,86 @@
+/**
+ * #314 anonymised dense-plan fixture.
+ *
+ * It preserves the structural shape of the owner's report without names,
+ * markers, layout, or original coordinates: 13 rooms, 44 catalogue walls,
+ * 24 intentional partitions, and one pre-existing two-point draft.  The last
+ * object is known debt and must remain the only invariant finding before and
+ * after drawing another room.
+ */
+import { WALL_KEY_PITCH } from './wall-key.mjs';
+
+export function makeV8DraftRegressionFixture() {
+  const step = WALL_KEY_PITCH;
+  const point = (x, y) => [x * step, y * step];
+  const segmentIds = new Map();
+  const wallSegments = [];
+  const keyOf = (a, b) => {
+    const left = `${a[0]},${a[1]}`;
+    const right = `${b[0]},${b[1]}`;
+    return left < right ? `${left}|${right}` : `${right}|${left}`;
+  };
+  const wallId = (a, b) => {
+    const key = keyOf(a, b);
+    let id = segmentIds.get(key);
+    if (!id) {
+      id = `wall-314-${String(wallSegments.length + 1).padStart(3, '0')}`;
+      segmentIds.set(key, id);
+      wallSegments.push({ id, a: [...a], b: [...b], cm: 15 });
+    }
+    return id;
+  };
+
+  const rooms = Array.from({ length: 13 }, (_, index) => {
+    const x0 = 4 + index * 12;
+    const x1 = x0 + 12;
+    const y0 = 4;
+    const y1 = 16;
+    const poly = [point(x0, y0), point(x1, y0), point(x1, y1)];
+    // Four split top edges make the catalogue population exactly 44 while
+    // keeping all rooms valid and non-overlapping.
+    if (index < 4) poly.push(point(x0 + 6, y1));
+    poly.push(point(x0, y1));
+    return {
+      id: `room-314-${String(index + 1).padStart(2, '0')}`,
+      name: `Room ${index + 1}`,
+      poly,
+      wall_ids: poly.map((a, edge) => wallId(a, poly[(edge + 1) % poly.length])),
+    };
+  });
+
+  const partitions = Array.from({ length: 24 }, (_, index) => {
+    const row = Math.floor(index / 8);
+    const x = 4 + (index % 8) * 18;
+    const y = 28 + row * 8;
+    return {
+      id: `partition-314-${String(index + 1).padStart(2, '0')}`,
+      a: point(x, y),
+      b: point(x + 8, y + 2),
+      cm: 15 + (index % 3) * 5,
+    };
+  });
+
+  if (wallSegments.length !== 44) {
+    throw new Error(`fixture catalogue drifted: expected 44, got ${wallSegments.length}`);
+  }
+
+  return {
+    model_version: 8,
+    spaces: [{
+      id: 'space-314-dense',
+      title: 'Dense regression fixture',
+      cell_cm: 5,
+      view_box: [0, 0, 400, 400],
+      rooms,
+      wall_segments: wallSegments,
+      partitions,
+      room_drafts: [{
+        id: 'draft-314-known-debt',
+        points: [point(4, 56), point(14, 64)],
+        segments: [{ id: 'wall-314-known-draft', cm: 15 }],
+      }],
+    }],
+    markers: [],
+    settings: {},
+  };
+}
@@ -28,6 +28,20 @@ radial spokes visible instead of hiding them under a translucent room fill.
 - `accept` requires `--reviewed`, a complete candidate report and current
  source fingerprint. It validates the whole set before copying anything and
  is the only command allowed to update baselines.
+- `scripts/golden-accept.mjs` wraps `accept` and additionally requires the
+  reviewer to declare intent, with two separate flags because they assert two
+  different things. `--expect-change=<id,id>` means "I know why this existing
+  baseline moved"; `--expect-new=<id,id>` means "I have looked at this new
+  frame". Anything that differs, or arrives without a baseline, and is not named
+  refuses the whole acceptance before a single file is copied; naming a scenario
+  under the wrong flag refuses it too. Only the named scenarios are written:
+  everything else keeps its reviewed bytes and its manifest hash, because
+  `passed` means "within threshold", not "byte-identical", and copying every
+  candidate let sub-threshold drift ratchet the baselines to the newest
+  environment unseen (#351). The first flag is what makes a local
+  capture admissible (see below) and blocks the one-command "accept everything so
+  CI turns green"; the second stops an empty or clipped frame from becoming the
+  contract unseen (#350).

 ## Workflow

@@ -43,17 +57,57 @@ Review `artifacts/golden/actual/` and, when existing references are present,
 `artifacts/golden/diff/`. If every image is intentional:

 ```bash
-npm run golden:accept -- --reviewed
+node scripts/golden-accept.mjs --reviewed --expect-change=wall-junctions-plan-t-dark
 npm run golden:verify
 ```

 Never accept images merely to make CI green. A matrix/framing change increments
 `GOLDEN_MATRIX_VERSION`; a normal rendering fix does not. The first canonical
 Linux baseline was reviewed and accepted during the v1.60.3-beta.1 gate.
-Future updates must still use the `golden-images` artifact produced by the Linux
-CI job as the review set: desktop font rasterisation can differ from the CI
-environment even with the same pinned Chromium. Pass its unpacked root via
-`--from=...` when accepting it locally.
+
+## Capturing candidates without a second CI round trip (#334)
+
+Accepting from the `golden-images` CI artifact still works and is still the
+safest route: unpack it and pass `--from=...`. It costs two full CI runs per
+visual fix, though — one to produce the artifact and one to verify the accepted
+baseline — and at matrix version 48 that toll is paid often.
+
+A local capture is admissible instead, because admissibility is now *proved*
+rather than assumed. Desktop font rasterisation can differ from the runner, but
+it cannot differ quietly: it would move every text-bearing scenario, not only
+the ones under edit. So the rule is simply that the capture must reproduce every
+accepted baseline the reviewer did not intend to change:
+
+```bash
+node scripts/golden-container.mjs                      # capture in the pinned image
+node scripts/golden-accept.mjs --reviewed --expect-change=<the scenarios you changed>
+```
+
+If the environment is not pixel-equivalent, unrelated scenarios come out
+`different`, the wrapper names them and refuses. A wrong container tag or a
+mismatched font set therefore cannot corrupt baselines — it can only fail.
+
+`scripts/golden-container.mjs` derives the image tag from the `playwright`
+version locked in `package-lock.json`, so the container Chromium equals the
+runner's; `--image=` overrides it when a distro-specific tag is needed
+(`...:v1.62.0-jammy`). The host `node_modules` is shadowed by an anonymous
+volume: the repository copy may be built for Windows, and `npm ci` inside the
+container would otherwise replace it with Linux binaries. The run does write
+`dist/` and the three bundle copies, exactly as a local `npm run bundle:sync`
+would.
+
+Docker is not a requirement of the rule, only a convenience: any Linux
+environment that satisfies the parity condition qualifies, WSL included. The
+`chromium` string recorded in the manifest keeps the browser build itself
+pinned, and `golden:verify` rejects a manifest captured by a different build.
+
+`scripts/golden-accept.mjs` deliberately wraps `demo/golden/accept.mjs` instead
+of replacing its checks: every `.mjs` under `demo/golden` belongs to
+`sourceFingerprint`, so editing the acceptance tool itself would declare the
+committed bundle, the documentation screenshot manifest and the baseline
+manifest stale — the very double round trip this change removes. Narrowing that
+corpus is worthwhile but separate: `scripts/source-fingerprint.mjs` is itself a
+build input, so any change to it forces one bundle rebuild.

 Scenarios may also declare a semantic pixel region (for example, a receiving
 room that must contain warm light). `golden:capture` and `golden:verify` reject
@@ -6,11 +6,21 @@ import { fileURLToPath } from 'node:url';
 import { sourceFingerprint } from '../../scripts/source-fingerprint.mjs';
 import { GOLDEN_MATRIX_VERSION, GOLDEN_SCENARIOS } from './matrix.mjs';
 import { GOLDEN_BASELINE_MANIFEST } from './policy.mjs';
+import {
+  goldenAcceptancePlan, goldenAcceptanceRefusal, goldenSilentDeclarations,
+} from '../../scripts/golden-acceptance.mjs';

 const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), '../..');
 const reviewed = process.argv.includes('--reviewed');
 const fromArg = process.argv.find((arg) => arg.startsWith('--from='));
 const from = resolve(fromArg ? fromArg.slice('--from='.length) : resolve(ROOT, 'artifacts/golden'));
+const list = (name) => {
+  const found = process.argv.find((arg) => arg.startsWith(`--${name}=`));
+  return (found ? found.slice(name.length + 3) : '')
+    .split(',').map((id) => id.trim()).filter(Boolean);
+};
+const declared = list('expect-change');
+const declaredNew = list('expect-new');
 if (!reviewed) throw new Error('refusing to replace baselines without explicit --reviewed');

 const reportPath = resolve(from, 'golden-report.json');
@@ -24,11 +34,29 @@ if (typeof report.chromium !== 'string' || !report.chromium)
  throw new Error('candidate report does not identify its Chromium build');
 if (!Array.isArray(report.results)) throw new Error('candidate report has no scenario results');

+const refusal = goldenAcceptanceRefusal(report.results, declared, declaredNew);
+if (refusal) throw new Error(refusal);
+
 const byId = new Map(report.results.map((result) => [result.id, result]));
 const baselineRoot = resolve(ROOT, 'demo/golden/baselines');
 mkdirSync(baselineRoot, { recursive: true });
-const hashes = {};
-const candidates = [];
+/**
+ * Прежний индекс: источник хешей для сцен, которые остаются как были (#351).
+ *
+ * `passed` не значит «байт в байт» — он значит «в пределах порога». Прежняя
+ * версия копировала кандидата поверх КАЖДОГО эталона, поэтому подпороговый
+ * дрейф уезжал в контракт молча, и накапливался: каждая приёмка подтягивала
+ * эталон к последней среде, порог не пересекался никогда, а эталон уходил.
+ * Так `1e341c60` заменил 22 картинки, объявив четыре. Владелец делал эту работу
+ * руками (`ad3f9981`: «nine unrelated baselines … were restored to their
+ * reviewed versions»); теперь её делает инструмент.
+ */
+const manifestPath = resolve(baselineRoot, GOLDEN_BASELINE_MANIFEST);
+const previous = existsSync(manifestPath)
+  ? JSON.parse(readFileSync(manifestPath, 'utf8')).scenarios || {}
+  : {};
+// Кандидат проверяется целиком, до всякого решения о замене: сломанный отчёт
+// не имеет права оставить каталог эталонов половинным.
 for (const scenario of GOLDEN_SCENARIOS) {
  const result = byId.get(scenario.id);
  const candidate = resolve(from, 'actual', `${scenario.id}.png`);
@@ -36,16 +64,20 @@ for (const scenario of GOLDEN_SCENARIOS) {
    throw new Error(`review candidate has an invalid run status: ${scenario.id} (${result?.status || 'missing'})`);
  if (!result?.actualSha256 || !existsSync(candidate))
    throw new Error(`review candidate missing: ${scenario.id}`);
-  const bytes = readFileSync(candidate);
-  const digest = createHash('sha256').update(bytes).digest('hex');
+  const digest = createHash('sha256').update(readFileSync(candidate)).digest('hex');
  if (digest !== result.actualSha256) throw new Error(`candidate changed after capture: ${scenario.id}`);
-  candidates.push({ scenario, candidate });
-  hashes[scenario.id] = digest;
 }
-// Validate the complete set first: a broken report must never leave a half-
-// updated baseline directory behind.
-for (const { scenario, candidate } of candidates)
-  copyFileSync(candidate, resolve(baselineRoot, `${scenario.id}.png`));
+const plan = goldenAcceptancePlan({
+  scenarioIds: GOLDEN_SCENARIOS.map((scenario) => scenario.id),
+  results: report.results,
+  previousHashes: previous,
+  declared,
+  declaredNew,
+});
+const hashes = plan.hashes;
+for (const id of plan.replace) {
+  copyFileSync(resolve(from, 'actual', `${id}.png`), resolve(baselineRoot, `${id}.png`));
+}
 writeFileSync(resolve(baselineRoot, GOLDEN_BASELINE_MANIFEST), `${JSON.stringify({
  schema: 1,
  matrixVersion: GOLDEN_MATRIX_VERSION,
@@ -54,4 +86,11 @@ writeFileSync(resolve(baselineRoot, GOLDEN_BASELINE_MANIFEST), `${JSON.stringify
  chromium: report.chromium,
  scenarios: hashes,
 }, null, 2)}\n`, 'utf8');
-console.log(`Accepted ${GOLDEN_SCENARIOS.length} reviewed golden baselines.`);
+const silent = goldenSilentDeclarations(report.results, declared);
+if (silent.length) {
+  console.log(`Объявлены как изменённые, но совпали с эталоном: ${silent.join(', ')}.`);
+}
+console.log(`Заменено эталонов: ${plan.replace.length}`
+  + `${plan.replace.length ? ` (${[...plan.replace].sort().join(', ')})` : ''}.`);
+console.log(`Сохранено без изменений: ${plan.keep.length}.`);
+console.log(`Индекс перезаписан на ${GOLDEN_SCENARIOS.length} сцен.`);
@@ -1,138 +1,145 @@
 {
  "schema": 1,
-  "matrixVersion": 46,
-  "acceptedAt": "2026-08-25T18:45:47.300Z",
-  "sourceFingerprint": "45ac1765a98f48f8b097462c558ddad82f0ffbf0f87422aef513e02a2a0aa8ab",
+  "matrixVersion": 49,
+  "acceptedAt": "2026-08-28T09:41:50.717Z",
+  "sourceFingerprint": "b6d9eb672c772bca7fa08bf25b4525cc8bbf3084320f383f16ab86a535090444",
  "chromium": "151.0.7922.34",
  "scenarios": {
-    "hidden-wall-diagnostics-plan-light": "6470ed8b09b21144ec1399389e9a57774e977a6473b8eaa7de7e9b5df3273f21",
-    "hidden-wall-diagnostics-plan-dark": "da6e725ddfad7c807408a710b78090dc222b56dcee484a29baa68b5452fc44e5",
+    "hidden-wall-diagnostics-plan-light": "37ba151aa6b1ea7b1b270d461ccca348444c5eeb14a5592bf045a0e69b0fb83e",
+    "hidden-wall-diagnostics-plan-dark": "565d5481f744704a2a6f18658b9b6fa65e7cdbfcd11b50a2bedbc0daae2d8488",
    "coincident-partition-before-dark": "19626db704fccb7a42b519ffb20b7bad82c726e8845c752ab451f731d264561c",
    "coincident-partition-thin-dark": "3afede1f99b86454bf4e50d9628196a2240243e034644592c5c3efa1b4561930",
    "coincident-partition-thick-dark": "57960bd09e6cbbeb073561692690ca68a72d6dbf8242198ef73b8d4ae4d8fbcc",
    "coincident-partition-virtual-dark": "da7adbf931ad95f4e620d9d088177f1da20d88a21b9e85b6ff2675925d5557b4",
+    "span-over-door-migrated-dark": "a817f5baacf5ff80d1f236ffaa176cb6331b75423393dae5b16e54f67f37c7e0",
    "split-corner-wall-before-dark": "3176dc67f54d5309f87c94e1077b4f69eb1db9f660469fbf97953038323430f3",
-    "split-corner-wall-thin-dark": "17e49394c300887bb5349bf477292571e96e209c9515db6853348883d95a1422",
-    "split-corner-wall-thick-dark": "f7864a6b2ab58586540f836183c9e59f09f9f57165ec0e0b9cd8444ada71153c",
+    "split-corner-wall-thin-dark": "48062a49e12728c377a7c4352148381b1be2a5606b6792d754ae055b04c22be1",
+    "split-corner-wall-thick-dark": "a5d795eec4561e3a1aa9c37843fadddcb04d888d5a49e6ffacf29c17b7798568",
    "split-zero-divider-taper-dark": "3de38befb41f15ef4047da1390e061b1b5756340142dd9204d011287ff39be5b",
-    "isometric-geometry-view-dark": "43ad006844a78b502b36aeeb82d82669532e06d2c798de928a5207acd24bd5f9",
-    "isometric-geometry-view-light": "0fcb10ffdc0baa9006d1c2f0406ebf19e71ba9feda180979a51b74166d7200d2",
-    "isometric-live-layers-dark": "8aaa914fc45780f67dd5c008a106696d21235a9acee7402f9cc8ae51a26660f3",
-    "isometric-no-borders-dark": "c105382d883bbdae8562b756ccbf47ac1fcf46675c6aa7654289856223a3ebf0",
-    "isometric-touch-kiosk-dark": "be122ceec8114374ba384f51d5d9287e498a97354865c5a9f91d505ca18d8640",
-    "isometric-large-warm-remount-dark": "d76e3334bf80bff265b1e8aa6770c5eff5df6fbfebeb4703b04d048c4252eb68",
-    "geometry-view-dark-fit": "1b80d2d0fe84cfe15f1fa29ccc2a2dcc66b4c5e62d1722c06c00442c78979be0",
-    "geometry-view-light-fit": "91caf6621af00eb0cd16589e2fc79976cdca1e8467d0e86151ecbc46948612d9",
-    "room-label-parity-view-dark": "7f1da43466a13f82a7595dddabe6938ed974debfb14c8f40e729e273a53ac4ff",
-    "room-label-parity-plan-dark": "5f976d5743d68a27b594e1a5ddf45e5ad3708f5c703409e5cefb7c96d3048096",
-    "room-label-parity-view-light": "ee3d303fb2b329c356a4354d355c29694130a38d4812ffbfefbe861f5d3f9860",
-    "room-label-parity-plan-light": "d32b538499a031d4310b243cc9ef43610f6cd67aabfde7cd01b59c88b0363ec5",
+    "isometric-geometry-view-dark": "0d8427299c77e1e3bb86f37f53128a6640b6666e0b682e5f96085c4f07a657ec",
+    "isometric-geometry-view-light": "a3e592448ad3ad4ff65266f1fd6f31259c01a9baf47392f6b8be9811d74f8dce",
+    "isometric-live-layers-dark": "90fa1c0b64a12626e481c5f34e515c53b3e06cd657f5976bb8a72127aec3e1e9",
+    "isometric-no-borders-dark": "a0abf9fdc31092980de3bcbf8598844b6e3d152363694e9bd070d45af73c26d9",
+    "isometric-touch-kiosk-dark": "d3ae363165c4f0aba65bcbac9bd6bdca79f29aca03bba997f3abec1860eb1e55",
+    "isometric-large-warm-remount-dark": "299401bd4b499876d40678593308b42ac8aa4d3328113f27ad5940fc3621184a",
+    "geometry-view-dark-fit": "2d96e776ea9fc8a136896b58df30abb13a8a53e6c40e5b4f4e12c6dba522380f",
+    "geometry-view-light-fit": "60e8a908fc1c3be3ca5c9b82bf432120d808d913f743c04683b4a2c501d84659",
+    "room-label-parity-view-dark": "b35675251b85144bca1bc15ed7bf27a4dd1eaa0bfc288e3e3b0d1cdefac79ae5",
+    "room-label-parity-plan-dark": "34c1010481e2799b8598e3c6f659ca7ec8e695a064eecacf3562000639f44d6a",
+    "room-label-parity-view-light": "789f8f3b6211d35e70021094f2063dc9c6ac57599d9d64743a33b7ae9dd868c2",
+    "room-label-parity-plan-light": "272dc35d85b1f07efc4c2a05c31f6adbf7d10c648e3c678e7235e35167f83a7d",
    "washer-active-cycle-dark": "d74a646bc71b8d6d0d5b09e6862b4846b0e369da2520afa76d5b3d601c832a15",
    "washer-idle-cycle-dark": "f7fae5c2f6856a3df5bd3f3028fcf829ef0039c7b43c91c27ac86d25626e8d66",
-    "day-cycle-dawn-dark": "3f32bc1ed042475516f7e239aedd7fee11717b00fa2103ae9f1231e006d64015",
-    "day-cycle-day-dark": "1a0f53c948ae669c7ab4e1dcb931c11e7c878974862637dd1f596011876a7ed4",
-    "day-cycle-dusk-dark": "ec95e99ac3c7e4d6affa2f7944759727251dc4f1b62e2855e421a7e48f7280eb",
-    "day-cycle-night-dark": "cc49dc53dabb63b7dd800eaa65c8748972fcf3c1abd948b34d1e0f973e63f0d2",
-    "geometry-plan-editor-dark": "fd8d067daa3b2a4e572dea9644486e6324318e8ea4e5f43e3df2069a05389a88",
-    "safe-resize-handles-clamp-light": "ed705040357cad043095baf12d02cc69abdc3db27ff40066a6979be85d035f77",
-    "safe-resize-handles-clamp-dark": "9d81a45f3acac787cde1b9eb74a858020fbad09670b8ff5b081869b5eca73b82",
-    "space-tab-drop-before-light": "401dded3d7fdff3e823d46eac1b3cef2d6e0eb05f48b5ea289cdd8ecd941dee0",
-    "space-tab-drop-after-dark": "a851621040e14f911b1080488f2c75e3d9bc0d5fef74fb5d0081f80b023ff0a2",
-    "plan-snap-endpoint-light": "db967076cd9fd50c2a2a1337e4ecbf4ef67cb7f800401f6227497c75415951d5",
-    "plan-snap-line-gaps-dark": "ff1b6bbf2e1b4272bb2f0e96d92136aa6960ee24acef1b63b4478e54441a4b58",
-    "wall-junctions-plan-preview-light": "fa81fa6c6dba92578a4beee5ed29f407443a3bc61affa25c44fcfefab0c7070c",
-    "wall-junctions-plan-t-dark": "f8a517d316a99ca9ee5b4ff56f515be15d440adfc551bbdaaa5e9d9a411a79bc",
+    "day-cycle-dawn-dark": "be3b891520637857b7f89dc88284753a15601ebae4db7db750714b9535348d33",
+    "day-cycle-day-dark": "1b791b8a773a5910a71338351ab12fdc36c22742a358b647ff4f295431fa4cfd",
+    "day-cycle-dusk-dark": "14182ad89301cb260ba21ee5077134ed408f038ea878ed4539b84f987182f910",
+    "day-cycle-night-dark": "407632fc54e13e6362b7e583d6e2b7bdd31b4093823846e4e630de0c8f542120",
+    "geometry-plan-editor-dark": "40a0083511c1ff9d0b8f1ec419af63e2a28f1f9a0ec3768387a10c89efe73905",
+    "safe-resize-handles-clamp-light": "f47a5bb09fa4415416d01ca5f4164014cc1d8dc7be54ea888e5399277104e94c",
+    "safe-resize-handles-clamp-dark": "3efd0ca2db8a06aa475e81e3635b878c3038d4763f840e6e856661b04a4fed96",
+    "space-tab-drop-before-light": "7024186821b13feb63ba254aee841379788bca1a5c01bfd07c42e15fe6b81179",
+    "space-tab-drop-after-dark": "5a2199e8b8364da9e85e0887334144e426f43b8022f2918bf130ea13cd099f5d",
+    "plan-snap-endpoint-light": "2185d5ec6726e07097ba1a911984a11d5ca9b460a1cd1e7b2a719255b7d0ed0b",
+    "plan-snap-line-gaps-dark": "276eb10f32be938640bd68a1cf837494f11cce8d10703721831360f3a1100d23",
+    "wall-junctions-plan-preview-light": "965860eb4302b60864b5e3191514c60b97bbcd6073960c437a973b4a880ecddb",
+    "wall-junctions-plan-t-dark": "258869fb3c5af9a223d63518bc6127bfde78c2c039d39583a965d68b225338ba",
    "wall-junctions-view-dark": "7b859c4f25f8a5dd4fca64d5b2f7aa64b65845fabbe83bc2388c2f99d29f71b1",
-    "junction-patch-resilience-plan-dark": "57ea7522c438e52292f226f975bb112930976b6e072b72322180d52ec0277f4f",
-    "junction-patch-resilience-view-dark": "1f0df26ed72bcc5bef06a8366d7043ad40b4a2bb744fa5a64248c29eae968424",
-    "wall-union-isolation-view-light": "291c045758be2814be88d12ab46bdc3d12cb99a03dbbcc9a1539c2c9a5931edf",
-    "wall-union-isolation-view-dark": "616fc6cc7144c9596ae52421027914e222f30f26de45215fa7e7b6175ca78543",
-    "multiwall-junction-bevel-view-dark": "e226d023fbab0502eb747395d43a46bb56bcf2be037ba4f9b7ad74ba406d9671",
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+    "junction-309-hump-dark": "abae96fd96ed8515d7b1e33b84858bdf08ac28a888898549874baa8c98202e7a",
+    "sharp-apex-legacy-dark": "93a46c66f7263a0325d0c4d50fa0677f3c902647ea5880960b99dc8fa04a01a5",
+    "junction-owner-repro-dark": "f5407d420449ebf897f94fcfcdaaf4630e818c043d3076b090f7d1944df5296b",
+    "large-house-zoom-040-dark": "736af1c340646c4c1cbab3d2270f67a535995e1ea1e2abe49c91d2c396052097",
+    "large-house-zoom-250-dark": "0a74099e265b38f376bb7bfd86d4a57c5d493ac3870478a7d55c48cf99e8f892",
+    "large-house-warm-remount-dark": "1c14dba8cdbc4628984091d395c1ac14faead1d43338e44aa3cb57976e519df6",
+    "device-dialog-desktop-en": "e142521eae1bd40861c1d92eadbcfd6d88aefa689cd5ee9b4c1b6378c8ce712c",
+    "device-dialog-mobile-ru": "7921b7d5e2c082fc4dd5053607a8228c2e63e0e72a401d86153effd54c2c6ca0",
+    "device-dialog-desktop-de": "ac3f657e072006f5c1686d89da61df922991a04f69d2d7994a03d1ba93532681",
+    "german-view-mobile-light": "9496071b11f510f1c851a9c60583a96bfe768c1fd1e12a2b1b9183dee7e453a8",
+    "toggle-entity-dialog-desktop-en": "f4924466de5e134c2d1f2456ff0c05f8aa8106f6b06398e87a263e3c536f16ea",
+    "toggle-entity-dialog-mobile-ru": "77e8fc03817a784888993490cdfba675482b8c56483199c1efa512db8531516b",
+    "device-help-popover-light-ru": "259a50065b7f09d07db656b6cfe79d1de34397665ff8dd8a8e361f6f29a7ea6a",
+    "decor-color-popover-mobile-ru": "51725859afc6a1e2d1b2ae8be270ab584608901623ef7e2d283b6b195644fd16",
+    "decor-color-popover-desktop-en": "98d769f5393afb2bad3fb5143a562da5b8bb9a5c8049f4c707706bbcb4f99f8d",
+    "general-color-popover-desktop-en": "008865918113e05847a7ad8ae0fdc068b5326acf1c591d855806b333084978a3",
+    "device-ripple-color-popover-mobile-ru": "4f2365818f46fe1e2b401e5835f5d29ea9c41b288d894025d7512db92f579762",
+    "space-room-color-popover-desktop-ru": "946c550232ff3819bb44058eff6c5deadfccf85527c23065137ee02fa457aed9",
+    "backup-full-preview-desktop-en": "6b68188269fdbaddaf4f2ce8fc0d10ea41e050f0c08cdbd9507548871a3786ef",
+    "backup-plan-only-export-desktop-en": "805fb7cd15959a7eee0b17150c4417e335f1b1030a438f7051c2b006a5f7d4f4",
+    "backup-space-preview-mobile-ru": "82cd93cb495ad77b92d635b4a3715601b1ae0e5e2974edcbbd461fe872c75bad",
+    "optimize-preflight-dialog-dark-en": "0473d7f16dd830aaddbec5c33f2b423fde48e2053a1094dbab052e6a2cbad9d4",
+    "optimize-preflight-dialog-light-ru": "a4eb6ef9930652bd7e55fbb725fd1bcc5a0e5b71e8060dbf6f772dd62cec5d36",
+    "optimize-orphan-references-dark-en": "f40417298e126fa804ddafb91d62b728c86a56c5a28b4fad12b732070faa4ad6",
+    "optimize-orphan-references-light-ru": "2d0319f681cfbe472ad5dede05d145a995dedee577d8d816e2fe46a519e019f5",
+    "card-editor-invalid-default-floor-light-en": "dbf251ece014cfee252e0dcb2d7c00eda66aa4b5bd125e4c83e248d4319d24b3",
+    "card-editor-invalid-default-floor-dark-ru": "422b74bb391b87e383350247ef1bc1f10ca48c8f6fe418f75bde94e62e3b8bc0"
  }
 }
--- a/Show More
+++ b/Show More
				`@@ -0,0 +1 @@`
				function e(e,o){return{id:e,title:o,plan_url:null,view_box:[0,0,1,1],rooms:[],wall_segments:[]}}function o(e="file"){const o="draw"===e;return{source:e,showBorders:o,showNames:o,displayTouched:!1}}function r(e,o){if(e.displayTouched)return{...e,source:o};const r="draw"===o;return{...e,source:o,showBorders:r,showNames:r}}function s(e,o,r){return{...e,[o]:r,displayTouched:!0}}function t(e,o,r){const s=(e?.spaces\|\|[]).find(e=>e?.id===r),t=new Set((s?.rooms\|\|[]).map(e=>String(e?.id\|\|"")).filter(Boolean)),n=[...new Set((e?.markers\|\|[]).filter(e=>!0!==e?.removed&&"string"==typeof e?.id).filter(e=>e.space===r\|\|"string"==typeof e.room_id&&t.has(e.room_id)\|\|o?.[e.id]?.s===r).map(e=>e.id))].sort((e,o)=>e.localeCompare(o));return{markerIds:n,count:n.length}}globalThis.__HOUSEPLAN_BUILD_FINGERPRINT__="0c61742c98d55aec077478fcee7b8acf52e2ac1b70e2ed23532483b845ca884f";export{t as a,e as c,o as i,r as s,s as t};