filtering: hiding is an explicit per-device flag (docs/FILTERING.md)

Agreed with the owner: whether a device is on the plan is a CHECKBOX
('Hide device from plan', every kind incl. virtual), not a runtime
algorithm. The old filter survives only as the SEEDER of those flags.

- marker.hidden is the flag; hidden devices are BUILT (room LQI counts
  them — owner's decision) but rendered only in the device editor with
  'Show hidden' on, ghosted. They cast no glow and no light fill: an
  invisible device casts no visible light (owner's decision).
- seedHiddenBindings(): non-physical devices (excluded domains, Group,
  scene, bridge, myheat children, grouped lamps) in bound areas WITHOUT a
  marker. The editing client materialises them into hidden:true stub
  markers, sets settings.filter_seeded, retires settings.show_all, and
  strips fresh-hidden ids from the red-dot list. Unticking the checkbox
  keeps a hidden:false marker — the seeder never revisits a marked device,
  so the user's decision is final. New non-physical devices hide silently;
  physical ones keep the red-dot flow.
- legacy configs (no filter_seeded) keep the OLD behaviour verbatim —
  runtime filter, shared show_all, hidden-means-gone — until an editing
  client materialises them, so a read-only tablet never sees a half-state.
- 'Show all' is renamed 'Show hidden' and is LOCAL to the tab; the shared
  settings.show_all retires with the runtime filter.
- 'Remove from plan' disappears for auto/entity devices (the checkbox is
  the way); a virtual device's Delete remains a real deletion.
- docs/FILTERING.md is the source of truth for the mechanism.

Tests: seeder/seeded/legacy/lights units (146), smoke_hidden_flag with 12
assertions (68 smokes). Inventory: 146 / 51 / 43 / 68.

demo/smoke_hidden_flag.mjs

@@ -0,0 +1,69 @@
+// docs/FILTERING.md: скрытие — явная галка. Конфиг материализуется сеятелем
+// (filter_seeded), галка в диалоге у всех устройств, «Показать скрытые» —
+// локальный режим редактора, скрытые рисуются призраками и только там.
+import { launch, checkAll, finish } from './serve.mjs';
+const { page, browser } = await launch();
+const out = {};
+
+// --- сеятель материализует конфиг при загрузке ---------------------------
+out.configSeeded = await page.evaluate(async () => {
+  const c = window.__card;
+  const t0 = Date.now();
+  while (!c._serverCfg?.settings?.filter_seeded && Date.now() - t0 < 3000) {
+    await new Promise((r) => setTimeout(r, 60));
+  }
+  return c._serverCfg?.settings?.filter_seeded === true;
+});
+
+// --- галка прячет, счётчик не считает, призрак только в редакторе --------
+Object.assign(out, await page.evaluate(async () => {
+  const o = {};
+  const c = window.__card;
+  const sr = () => c.shadowRoot || c.renderRoot;
+  const visibleIds = () => [...sr().querySelectorAll('.dev')].length;
+  const before = visibleIds();
+
+  const d = c._devices.find((x) => x.space === 'f1' && x.bindingKind === 'device');
+  c._serverCfg.markers = c._serverCfg.markers || [];
+  c._serverCfg.markers.push({ id: d.id, binding: 'device:' + d.bindingRef, hidden: true });
+  c._cfgEpoch++; c._regSignature = '';
+  c._maybeRebuildDevices(); c.requestUpdate(); await c.updateComplete;
+
+  o.hiddenNotRendered = visibleIds() === before - 1;
+  const built = c._devices.find((x) => x.id === d.id);
+  o.stillBuilt = !!built && built.hidden === true;
+  o.countExcludesHidden = (sr().querySelector('.count')?.textContent || '').includes(String(before - 1));
+
+  // в просмотре тумблера нет эффекта — призраки только в редакторе устройств
+  c._showHidden = true; c.requestUpdate(); await c.updateComplete;
+  o.noGhostsInView = !sr().querySelector('.dev.ghost');
+  c._setMode('devices'); c.requestUpdate(); await c.updateComplete;
+  o.ghostInEditor = !!sr().querySelector('.dev.ghost');
+  // тумблер локальный: конфиг не трогается
+  o.toggleIsLocal = c._serverCfg.settings.show_all === undefined;
+
+  // --- галка в диалоге у авто-устройства, кнопки «Удалить» нет -----------
+  const ghost = c._devices.find((x) => x.id === d.id);
+  c._openMarkerDialog(ghost); await c.updateComplete;
+  o.checkboxOn = c._markerDialog?.hideFromPlan === true;
+  o.noDeleteForAuto = !sr().querySelector('.dialog .btn.danger');
+  // снимаем галку и сохраняем — маркер остаётся с hidden:false (анти-повтор)
+  c._markerDialog = { ...c._markerDialog, hideFromPlan: false };
+  await c._saveMarker(); await c.updateComplete;
+  const m = (c._serverCfg.markers || []).find((x) => x.binding === 'device:' + d.bindingRef);
+  o.untickKeepsMarker = !!m && m.hidden === false;
+  const back = c._devices.find((x) => x.id === d.id) || c._devices.find((x) => x.bindingRef === d.bindingRef);
+  o.deviceVisibleAgain = !!back && !back.hidden;
+
+  // --- у виртуального кнопка «Удалить» есть -------------------------------
+  c._openMarkerDialog(); await c.updateComplete;
+  c._markerDialog = { ...c._markerDialog, name: 'Тест', binding: 'virtual' };
+  await c._saveMarker(); await c.updateComplete;
+  const virt = c._devices.find((x) => x.virtual);
+  c._openMarkerDialog(virt); await c.updateComplete;
+  o.deleteForVirtual = !!sr().querySelector('.dialog .btn.danger');
+  c._markerDialog = null; c._setMode('view');
+  return o;
+}));
+
+await finish(browser, checkAll(out));

docs/FILTERING.md

@@ -0,0 +1,61 @@
+# Filtering: the explicit "hide from plan" flag
+
+Agreed with the owner 2026-07-29. This document is the source of truth for the
+mechanism; the code follows it.
+
+## Principle
+
+Whether a device is on the plan is an EXPLICIT, per-device fact: the
+"Hide from plan" checkbox, stored as `marker.hidden`. The old on-the-fly
+filtering algorithm survives only as the SEEDER of those flags — it decides
+the initial value once, and the user owns the flag from then on.
+
+## Data model
+
+- `marker.hidden: true` — hidden from the plan. For an auto device without a
+  marker, hiding creates a stub marker (this mechanism predates this spec).
+- `marker.hidden: false` (marker present) — explicitly VISIBLE: the seeder
+  never touches a device that has any marker, so unhiding must KEEP the stub
+  marker. That is the re-seed protection.
+- No marker — never evaluated by the seeder yet, or a plain physical device.
+- `settings.filter_seeded: true` — this config has been materialised.
+- `settings.show_all` — removed (deleted during materialisation). The old
+  toggle was shared config state; the new one is a local editor tool.
+
+## Seeding
+
+"Non-physical" = the old filter rules: excluded integration domains, model
+"Group", scene-like models, bridges, myheat children, and individual lamp
+devices in an area covered by a light group (when group folding is on).
+
+The seeder runs on the editing client (write permission required) whenever
+devices rebuild, and creates `hidden: true` stub markers for non-physical
+devices in BOUND areas that have NO marker. It is idempotent: marked devices
+are never revisited. It fires on:
+
+1. first load of a config without `filter_seeded` (materialises the current
+   behaviour; nothing changes visually, the flags become real and editable);
+2. an area newly bound to the plan;
+3. a new device appearing in a bound area — non-physical ones are hidden
+   silently (no red dot); physical ones keep the red-dot flow.
+
+Until a config is seeded (`filter_seeded` absent), `buildDevices` applies the
+LEGACY runtime filter, so a read-only client on an old config sees exactly
+the old behaviour until an editing client materialises it.
+
+## Behaviour
+
+- Hidden devices ARE built (flagged `hidden`), but not rendered in any mode,
+  except the device editor with "Show hidden devices" on — there they render
+  ghosted (translucent, dashed) and clicking opens the dialog to untick.
+- "Show hidden devices" (rename of "Show all") is LOCAL, ephemeral state of
+  the current tab.
+- Room LQI counts hidden devices (owner's decision).
+- Light fill and glow do NOT count hidden devices — an invisible device casts
+  no visible light (owner's decision). Room climate is registry-wide and
+  unaffected, as before.
+- The checkbox appears in the dialog of EVERY device kind, virtual included.
+- "Remove from plan" disappears for auto/entity devices (the checkbox is the
+  one way to hide); a virtual device's "Delete" remains a real deletion.
+- Duplicate names are still numbered, light groups still fold — those are
+  aggregation, not hiding.

docs/TESTING.md

@@ -239,6 +239,14 @@ Run the *core flows* (marked ★ below) in each environment at least once per mi
       on the plan after a reload. Same for each tap action and each fill mode
       [auto: backend test_every_display_mode_the_editor_offers_is_accepted and
       neighbours, test_a_marker_showing_its_value_can_be_saved]
+- [ ] Hide-from-plan flag (dev, docs/FILTERING.md): every device dialog has
+      the checkbox, incl. virtual; hidden devices vanish from every mode and
+      the count, still count toward room LQI, cast no glow/light fill; the
+      device editor's "Show hidden" (local, per tab) shows them ghosted;
+      unticking keeps a hidden:false marker (re-seed protection); an old
+      config materialises on first load by an editing client and legacy
+      clients keep the old behaviour until then
+      [auto: smoke_hidden_flag + unit seedHiddenBindings/seeded/legacy]
 - [ ] Yellow means working (dev): a TRV whose hvac_action is heating glows
       yellow; one that is merely enabled (idle) or has a service switch on
       (anti-scaling, child lock) stays dark; a lit light yellows its icon in

src/devices.ts

@@ -14,6 +14,8 @@ export interface BuildCtx {
   markers: Marker[];
   settings: ServerConfig['settings'];
   excluded: Set<string>;
+  /** LEGACY only: honoured while the config has no settings.filter_seeded.
+   *  Seeded configs hide by explicit marker flags (docs/FILTERING.md). */
   showAll: boolean;
   firstSpaceId: string;
   /** Localized display strings for generated device names. */
@@ -202,6 +204,7 @@ export function resolveIcon(hass: any, name: string, model: string | undefined,
 
 function applyMarker(item: DevItem, m: Marker): void {
   item.marker = m;
+  if (m.hidden) item.hidden = true;
   if (m.name) item.name = m.name;
   if (m.icon) item.icon = m.icon;
   if (m.model != null) item.model = m.model;
@@ -211,6 +214,43 @@ function applyMarker(item: DevItem, m: Marker): void {
   item.tapAction = m.tap_action ?? null;
 }
 
+/**
+ * The SEEDER (docs/FILTERING.md): bindings of non-physical devices in bound
+ * areas that have no marker yet. The editing client turns each into a
+ * `hidden: true` stub marker — after that the flag belongs to the user, and a
+ * marker of ANY kind (even `hidden: false`) makes the device invisible to
+ * this function forever. Idempotent by construction.
+ */
+export function seedHiddenBindings(ctx: Omit<BuildCtx, 'showAll' | 'loc'>): string[] {
+  const { hass: h, areaToSpace, markers, settings, excluded, iconRules } = ctx;
+  const groupLights = settings.group_lights !== false;
+  const groups = lightGroups(h, groupLights);
+  const groupedAreas = new Set(groups.map((g) => g.area));
+  const entsBy = entitiesByDevice(h);
+  const marked = new Set(markers.map((m) => m.binding));
+  const out: string[] = [];
+  for (const dev of Object.values<any>(h.devices)) {
+    const area = dev.area_id;
+    if (!area || !areaToSpace[area]) continue;
+    if (dev.entry_type === 'service') continue;
+    if (marked.has('device:' + dev.id)) continue;
+    const entIds = entsBy[dev.id] || [];
+    const dom = domainOfDevice(h, dev, entIds);
+    let nonPhysical =
+      excluded.has(dom)
+      || dev.model === 'Group'
+      || /scene/i.test(dev.model || '')
+      || /bridge/i.test((dev.model || '') + (dev.name || ''))
+      || (dom === 'myheat' && !!dev.via_device_id);
+    if (!nonPhysical && groupLights && groupedAreas.has(area)) {
+      const name = (dev.name_by_user || dev.name || '').trim();
+      if (resolveIcon(h, name, dev.model, entIds, iconRules) === 'mdi:lightbulb') nonPhysical = true;
+    }
+    if (nonPhysical) out.push('device:' + dev.id);
+  }
+  return out;
+}
+
 /** Filtering + light groups + markers (metadata/rebinding) + virtual ones. A hybrid. */
 export function buildDevices(ctx: BuildCtx): DevItem[] {
   const { hass: h, areaToSpace, markers, settings, excluded, showAll, firstSpaceId, loc, iconRules } = ctx;
@@ -234,11 +274,13 @@ export function buildDevices(ctx: BuildCtx): DevItem[] {
     if (dev.entry_type === 'service') continue;
     if (claimed.has('device:' + dev.id)) continue; // a marker will take over below
     const marker = markerFor('device', dev.id);
-    if (marker && marker.hidden) continue;
+    if (marker && marker.hidden && !settings.filter_seeded) continue; // legacy: dropped entirely
     const entIds = entsBy[dev.id] || [];
     const dom = domainOfDevice(h, dev, entIds);
-    // filtering (can be turned off with the “show all” toggle)
-    if (!showAll) {
+    // LEGACY runtime filter: only while the config is not yet materialised
+    // (docs/FILTERING.md). A seeded config hides by explicit marker flags.
+    const legacy = !settings.filter_seeded;
+    if (legacy && !showAll) {
       if (excluded.has(dom)) continue;
       if (dev.model === 'Group') continue;
       if (/scene/i.test(dev.model || '')) continue;
@@ -249,7 +291,7 @@ export function buildDevices(ctx: BuildCtx): DevItem[] {
     const key = name + '|' + area;
     let icon = resolveIcon(h, name, dev.model, entIds, iconRules);
     if (entIds.some((e) => e.startsWith('lock.'))) icon = 'mdi:lock';
-    if (!showAll && groupLights && icon === 'mdi:lightbulb' && groupedAreas.has(area)) continue;
+    if (legacy && !showAll && groupLights && icon === 'mdi:lightbulb' && groupedAreas.has(area)) continue;
     // duplicates by “name|zone” are numbered rather than hidden
     seen[key] = (seen[key] || 0) + 1;
     const dispName = seen[key] > 1 ? name + ' ' + seen[key] : name;
@@ -292,7 +334,10 @@ export function buildDevices(ctx: BuildCtx): DevItem[] {
 
   // 3) explicit markers (rebinding/metadata/virtual)
   for (const m of markers) {
-    if (m.hidden) continue;
+    // Hidden is a FLAG now, not an absence: the device is built (room LQI
+    // still counts it) and the renderer decides. Legacy configs keep the old
+    // "hidden = gone" until they are seeded (docs/FILTERING.md).
+    if (m.hidden && !settings.filter_seeded) continue;
     const [kind, ref] = m.binding.split(':');
     if (kind === 'device') {
       const dev = h.devices[ref];
@@ -370,10 +415,10 @@ export function buildDevices(ctx: BuildCtx): DevItem[] {
  * Light situation of an area: 'on' if any light entity of the area's devices is on,
  * 'off' if lights exist but none is on, 'none' when the area has no lights at all.
  */
-export function areaLights(hass: any, devices: { area: string; entities: string[] }[], area: string): 'on' | 'off' | 'none' {
+export function areaLights(hass: any, devices: { area: string; entities: string[]; hidden?: boolean }[], area: string): 'on' | 'off' | 'none' {
   let seen = false;
   for (const d of devices) {
-    if (d.area !== area) continue;
+    if (d.area !== area || d.hidden) continue; // an invisible device casts no visible light
     for (const eid of d.entities) {
       if (!eid.startsWith('light.')) continue;
       seen = true;
@@ -530,13 +575,13 @@ export function areaClimate(
 /** How many of the area's lights are on: {on, total}, or null without lights. */
 export function areaLightStats(
   hass: any,
-  devices: { area: string; entities: string[] }[],
+  devices: { area: string; entities: string[]; hidden?: boolean }[],
   area: string,
 ): { on: number; total: number } | null {
   const seen = new Set<string>();
   let on = 0;
   for (const dv of devices) {
-    if (dv.area !== area) continue;
+    if (dv.area !== area || dv.hidden) continue; // hidden lights are not part of the picture
     for (const eid of dv.entities) {
       if (!eid.startsWith('light.') || seen.has(eid)) continue;
       seen.add(eid);

src/houseplan-card.ts

@@ -25,7 +25,7 @@ import {
   DISPLAY_MODES, TAP_ACTIONS, SPACE_FILL_MODES, ROOM_FILL_MODES,
 } from './logic';
 import { ContentSigner } from './signing';
-import { buildDevices, lqiFor, tempFor, humFor, isHumEntity, areaLights, areaTemp, areaHum, areaLightStats, sourceValue, areaClimateMap, litLightEntity, type AreaClimate } from './devices';
+import { buildDevices, seedHiddenBindings, lqiFor, tempFor, humFor, isHumEntity, areaLights, areaTemp, areaHum, areaLightStats, sourceValue, areaClimateMap, litLightEntity, type AreaClimate } from './devices';
 import type {
   OpeningCfg,
   RoomCfg, SpaceModel, PdfRef, Marker, ServerConfig, DevItem, CardConfig,
@@ -293,7 +293,8 @@ class HouseplanCard extends LitElement {
     link: string;
     description: string;
     pdfs: PdfRef[];
-    room: string;        // 'space#area' for a virtual one
+    room: string;
+    hideFromPlan: boolean;        // 'space#area' for a virtual one
     busy: boolean;
   } | null = null;
   private _spaceDialog: {
@@ -671,13 +672,67 @@ class HouseplanCard extends LitElement {
     return this._serverCfg?.settings || {};
   }
 
+  /** LOCAL editor tool (docs/FILTERING.md): show the hidden devices ghosted.
+   *  The old toggle wrote settings.show_all — shared state that flipped the
+   *  plan for every wall tablet at once. Legacy configs still honour it
+   *  through buildDevices until they are seeded. */
+  private _showHidden = false;
+
   private get _showAll(): boolean {
-    return !!this._settings.show_all;
+    return this._settings.filter_seeded ? this._showHidden : !!this._settings.show_all;
   }
 
   private _toggleShowAll(): void {
     if (!this._serverCfg) return;
-    this._serverCfg = { ...this._serverCfg, settings: { ...this._serverCfg.settings, show_all: !this._showAll } };
+    if (this._settings.filter_seeded) {
+      this._showHidden = !this._showHidden;
+      this.requestUpdate();
+      return;
+    }
+    // legacy config: the old shared behaviour until an editor materialises it
+    this._serverCfg = { ...this._serverCfg, settings: { ...this._serverCfg.settings, show_all: !this._settings.show_all } };
+    this._regSignature = '';
+    this._maybeRebuildDevices();
+    this._saveConfig();
+    this.requestUpdate();
+  }
+
+  /**
+   * The seeder (docs/FILTERING.md): materialise the filter into explicit
+   * hidden flags. Runs after every device rebuild on a client that may write;
+   * idempotent — a device with ANY marker is never revisited, so an unticked
+   * checkbox (a marker with hidden: false) is re-seed protection. Also
+   * removes freshly hidden ids from the red-dot list: a dot on an invisible
+   * device would wait forever.
+   */
+  private _seedHiddenDevices(): void {
+    if (!this._serverCfg || !this._norm || !this._canEdit) return;
+    const cfg = this._serverCfg;
+    const bindings = seedHiddenBindings({
+      hass: this.hass,
+      areaToSpace: Object.fromEntries(
+        Object.entries(this._areaToSpace).map(([a, v]) => [a, v.space]),
+      ),
+      markers: this._markers,
+      settings: this._settings,
+      excluded: this._excluded,
+      firstSpaceId: this._model[0]?.id || '',
+      iconRules: this._iconRules,
+    });
+    if (!bindings.length && cfg.settings?.filter_seeded) return;
+    cfg.markers = cfg.markers || [];
+    const hiddenIds: string[] = [];
+    for (const b of bindings) {
+      const id = 'h' + b.slice(b.indexOf(':') + 1);
+      cfg.markers.push({ id, binding: b, hidden: true });
+      hiddenIds.push(b.slice(b.indexOf(':') + 1));
+    }
+    const st = { ...(cfg.settings || {}), filter_seeded: true } as any;
+    delete st.show_all; // the shared toggle retires with the runtime filter
+    if (hiddenIds.length && Array.isArray(st.new_device_ids)) {
+      st.new_device_ids = st.new_device_ids.filter((x: string) => !hiddenIds.includes(x));
+    }
+    cfg.settings = st;
     this._regSignature = '';
     this._maybeRebuildDevices();
     this._saveConfig();
@@ -1007,6 +1062,7 @@ class HouseplanCard extends LitElement {
     });
     this._defPos = this._defaultPositions();
     this._syncNewDevices();
+    this._seedHiddenDevices();
   }
 
   /**
@@ -2753,6 +2809,7 @@ class HouseplanCard extends LitElement {
         room: d.marker?.room_id
           ? d.space + '#@' + d.marker.room_id
           : d.space && d.area ? d.space + '#' + d.area : '',
+        hideFromPlan: d.marker?.hidden === true,
         busy: false,
       };
     } else {
@@ -2762,7 +2819,7 @@ class HouseplanCard extends LitElement {
         display: 'badge', rippleColor: '', rippleSize: 3, size: 1, angle: 0,
         tapAction: '', defaultTap: 'info', controls: [], controlsFilter: '', isLight: false,
         glowRadius: '', model: '',
-        link: '', description: '', pdfs: [], room: '', busy: false,
+        link: '', description: '', pdfs: [], room: '', hideFromPlan: false, busy: false,
         uploadId: 'up_' + Date.now().toString(36) + Math.random().toString(36).slice(2, 6),
       };
     }
@@ -2966,6 +3023,10 @@ class HouseplanCard extends LitElement {
         link: dlg.link.trim() || null,
         description: dlg.description.trim() || null,
         pdfs: dlg.pdfs,
+        // Explicit false, not absence: a marker of any kind is what tells the
+        // seeder "the user decided" — unticking must not invite a re-hide
+        // (docs/FILTERING.md).
+        hidden: dlg.hideFromPlan ? true : false,
       };
       // save the room choice (always for virtual ones; for bound ones — if chosen)
       if (dlg.binding === 'virtual' || dlg.room) {
@@ -3612,6 +3673,7 @@ class HouseplanCard extends LitElement {
     const spots: { pos: { x: number; y: number }; c: string; alpha: number; clip: string[] | null; r: number }[] = [];
     for (const d of this._devices) {
       if (d.space !== space.id) continue;
+      if (d.hidden) continue; // an invisible device casts no visible light (docs/FILTERING.md)
       // A light source is normally a device with a lit light.* entity. With the
       // "is a light source" flag (field request: a smart SWITCH driving dumb
       // fixtures) any lit entity counts — the switch itself, or the lights it
@@ -3895,7 +3957,11 @@ class HouseplanCard extends LitElement {
     }
     const space = this._spaceModel();
     const vb = space.vb;
-    const devs = this._devices.filter((d) => d.space === space.id);
+    // hidden devices render ONLY in the device editor with "show hidden" on
+    // (ghosted); everywhere else the flag removes them from sight — but not
+    // from the build, so room LQI still counts them (docs/FILTERING.md)
+    const showGhosts = this._mode === 'devices' && this._showAll;
+    const devs = this._devices.filter((d) => d.space === space.id && (!d.hidden || showGhosts));
     const disp = spaceDisplayOf(this._curSpaceCfg);
     const showLqi = disp.showLqi ?? this._config.show_signal ?? true;
     const cfgSize = this._config.icon_size ?? 2.5;
@@ -3954,7 +4020,7 @@ class HouseplanCard extends LitElement {
                 )}
               </div>`
             : nothing}
-          <span class="count">${this._t('count.devices', { n: devs.length })}</span>
+          <span class="count">${this._t('count.devices', { n: devs.filter((d) => !d.hidden).length })}</span>
           <span class="spacer"></span>
           <div class="zoomctl">
             <button class="btn zb" @click=${() => this._stepZoom(-1)} title=${this._t('title.zoom_out')}><ha-icon icon="mdi:minus"></ha-icon></button>
@@ -4184,7 +4250,7 @@ class HouseplanCard extends LitElement {
     }
     if (lightC) st.push(`--light-color:${lightC}`);
     return html`<div
-      class="dev ${cls} ${this._selId === d.id ? 'sel' : ''} ${d.virtual ? 'virtual' : ''} ${disp === 'ripple' ? 'noicon' : ''} ${valText != null ? 'valonly' : ''} ${lightC ? 'rgb' : ''} ${alarm ? 'alarm' : ''}"
+      class="dev ${cls} ${this._selId === d.id ? 'sel' : ''} ${d.virtual ? 'virtual' : ''} ${d.hidden ? 'ghost' : ''} ${disp === 'ripple' ? 'noicon' : ''} ${valText != null ? 'valonly' : ''} ${lightC ? 'rgb' : ''} ${alarm ? 'alarm' : ''}"
       style="${st.join(';')}"
       @click=${(e: MouseEvent) => this._clickDevice(e, d)}
       @contextmenu=${(e: MouseEvent) => this._ctxDevice(e, d)}
@@ -5241,6 +5307,11 @@ class HouseplanCard extends LitElement {
               @change=${(e: Event) => (this._markerDialog = { ...d, isLight: (e.target as HTMLInputElement).checked })} />
             <span>${this._t('marker.is_light')}</span>
           </label>
+          <label class="srcrow" title=${this._t('marker.hide_tip')}>
+            <input type="checkbox" .checked=${d.hideFromPlan}
+              @change=${(e: Event) => (this._markerDialog = { ...d, hideFromPlan: (e.target as HTMLInputElement).checked })} />
+            <span>${this._t('marker.hide')}</span>
+          </label>
           <label>${this._t('marker.glow_radius_label')}</label>
           <div class="colorrow">
             <input class="tempin" type="number" min="0.5" step="0.5"
@@ -5325,7 +5396,7 @@ class HouseplanCard extends LitElement {
           </div>
         </div>
         <div class="row">
-          ${d.devId
+          ${d.devId && d.binding === 'virtual'
             ? html`<button class="btn danger" @click=${this._deleteMarker}>
                 <ha-icon icon="mdi:delete-outline"></ha-icon>${this._t('btn.remove')}
               </button>`

src/i18n/en.json

@@ -21,7 +21,7 @@
   "title.zoom_out": "Zoom out",
   "title.zoom_reset": "Reset zoom",
   "title.add_device": "Add a device to the plan",
-  "title.show_all": "Show all area devices (no filtering)",
+  "title.show_all": "Show hidden devices (ghosted, this tab only)",
   "title.markup": "Room markup: grid, lines, outlines",
   "title.configure_space": "Configure space",
   "title.add_space": "Add space",
@@ -244,7 +244,7 @@
   "opening.lock_pending": "Working…",
   "title.close_editor": "Close editor (back to view)",
   "devbar.add": "Add",
-  "devbar.show_all": "Show all",
+  "devbar.show_all": "Show hidden",
   "devbar.rules": "Icon rules",
   "space.roomcard_section": "Room card shows:",
   "space.label_temp": "Temperature",
@@ -338,5 +338,7 @@
   "btn.use": "Use",
   "confirm.delete_plan": "Delete the plan file \"{name}\" from the server? This cannot be undone.",
   "toast.plans_list_failed": "Could not list the stored plans: {err}",
-  "toast.plan_delete_failed": "Could not delete the plan: {err}"
+  "toast.plan_delete_failed": "Could not delete the plan: {err}",
+  "marker.hide": "Hide device from plan",
+  "marker.hide_tip": "The device is not drawn on the plan but still counts toward the room signal. To see it: the \"Show hidden\" button in the device editor."
 }

src/i18n/ru.json

@@ -21,7 +21,7 @@
   "title.zoom_out": "Отдалить",
   "title.zoom_reset": "Сбросить масштаб",
   "title.add_device": "Добавить устройство на план",
-  "title.show_all": "Показывать все устройства зоны (без фильтрации)",
+  "title.show_all": "Показать скрытые устройства (полупрозрачными, только в этой вкладке)",
   "title.markup": "Разметка комнат: сетка, линии, контуры",
   "title.configure_space": "Настроить пространство",
   "title.add_space": "Добавить пространство",
@@ -244,7 +244,7 @@
   "opening.lock_pending": "Выполняется…",
   "title.close_editor": "Закрыть редактор (вернуться к просмотру)",
   "devbar.add": "Добавить",
-  "devbar.show_all": "Показать все",
+  "devbar.show_all": "Показать скрытые",
   "devbar.rules": "Правила иконок",
   "space.roomcard_section": "В карточке комнаты:",
   "space.label_temp": "Температура",
@@ -338,5 +338,7 @@
   "btn.use": "Выбрать",
   "confirm.delete_plan": "Удалить файл плана «{name}» с сервера? Действие необратимо.",
   "toast.plans_list_failed": "Не удалось получить список планов: {err}",
-  "toast.plan_delete_failed": "Не удалось удалить план: {err}"
+  "toast.plan_delete_failed": "Не удалось удалить план: {err}",
+  "marker.hide": "Скрыть устройство с плана",
+  "marker.hide_tip": "Устройство не отображается на плане, но участвует в расчёте сигнала комнаты. Показать: кнопка «Показать скрытые» в редакторе устройств."
 }

src/space-render.ts

@@ -65,7 +65,8 @@ export function renderSpaceStatic(o: StaticRenderOpts): TemplateResult | null {
     loc,
     iconRules,
   });
-  const devs = all.filter((d) => d.space === o.spaceId);
+  // the static card never shows hidden devices — there is no editor here
+  const devs = all.filter((d) => d.space === o.spaceId && !d.hidden);
   const defPos = defaultPositions(devs, space, iconPct);
 
   const roomShapes = space.rooms

src/styles.ts

@@ -963,6 +963,13 @@ export const cardStyles = css`
     .dev.virtual {
       border-style: dashed;
     }
+    /* "hide from plan" flag, shown only in the device editor with the
+       "show hidden devices" toggle on (docs/FILTERING.md) */
+    .dev.ghost {
+      opacity: 0.4;
+      border-style: dashed;
+      filter: saturate(0.4);
+    }
     .dev.sel {
       border-color: #ffc14d;
       box-shadow: 0 0 0 3px rgba(255, 193, 77, 0.35);

src/types.ts

@@ -90,7 +90,9 @@ export interface ServerConfig {
   settings: {
     exclude_integrations?: string[];
     group_lights?: boolean;
-    show_all?: boolean;
+    show_all?: boolean; // legacy: removed when the config is materialised
+  /** The filter flags are materialised into markers (docs/FILTERING.md). */
+  filter_seeded?: boolean;
     icon_rules?: { pattern: string; icon: string }[];
   };
 }
@@ -101,6 +103,9 @@ export interface DevItem {
   model: string;
   area: string;
   space: string;
+  /** "Hide from plan": built (so room LQI still counts it) but not rendered,
+   *  except ghosted in the device editor with "show hidden" on. */
+  hidden?: boolean;
   icon: string;
   entities: string[];
   primary?: string;

test/devices.test.mjs

@@ -1,6 +1,6 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
-import { buildDevices, lightGroups, primaryEntity, lqiFor, tempFor, humFor, areaLights, areaTemp, areaHum, areaLightStats, sourceValue , areaClimate, areaClimateMap, litLightEntity } from '../test-build/devices.js';
+import { buildDevices, lightGroups, primaryEntity, lqiFor, tempFor, humFor, areaLights, areaTemp, areaHum, areaLightStats, sourceValue , areaClimate, areaClimateMap, litLightEntity, seedHiddenBindings } from '../test-build/devices.js';
 import { compileIconRules, iconFor } from '../test-build/rules.js';
 
 /** Minimal fake hass around the pieces buildDevices reads. */
@@ -524,3 +524,64 @@ test('litLightEntity: one truth for "this thing is shining"', () => {
     'switch.wall',
   );
 });
+
+
+// ---------- explicit hide-from-plan flags (docs/FILTERING.md) ----------
+
+test('seedHiddenBindings: non-physical devices in bound areas, unmarked only', () => {
+  const h = mkHass({ devices: {
+    lamp: dev('lamp', 'Lamp', 'Bulb', 'living'),
+    bridge: dev('bridge', 'Z2M Bridge', 'Bridge', 'living'),
+    grp: dev('grp', 'All lights', 'Group', 'living'),
+    scn: dev('scn', 'Evening', 'Scene switch', 'living'),
+    faraway: dev('faraway', 'Bridge 2', 'Bridge', 'garage'), // unbound area
+  }});
+  const ctx = { hass: h, areaToSpace: { living: 'f1' }, markers: [], settings: {},
+    excluded: new Set(['hacs']), firstSpaceId: 'f1' };
+  assert.deepEqual(seedHiddenBindings(ctx).sort(), ['device:bridge', 'device:grp', 'device:scn']);
+  // a marker of ANY kind — even hidden: false — is the user's decision
+  const marked = { ...ctx, markers: [
+    { id: 'x', binding: 'device:bridge', hidden: false },
+    { id: 'y', binding: 'device:grp', hidden: true },
+  ] };
+  assert.deepEqual(seedHiddenBindings(marked), ['device:scn'], 'marked devices are never revisited');
+});
+
+test('seeded config: hidden is a flag, not an absence', () => {
+  const h = mkHass({ devices: {
+    lamp: dev('lamp', 'Lamp', 'Bulb', 'living'),
+    plug: dev('plug', 'Plug', 'Socket', 'living'),
+  }});
+  const res = buildDevices(baseCtx(h, {
+    settings: { filter_seeded: true },
+    markers: [{ id: 'hplug', binding: 'device:plug', hidden: true }],
+  }));
+  const plug = res.find((d) => d.bindingRef === 'plug');
+  assert.ok(plug, 'the hidden device is BUILT — room LQI still counts it');
+  assert.equal(plug.hidden, true, 'and flagged for the renderer');
+  assert.ok(!res.find((d) => d.id === 'lamp').hidden);
+});
+
+test('legacy config (no filter_seeded): the runtime filter still applies', () => {
+  const h = mkHass({ devices: {
+    lamp: dev('lamp', 'Lamp', 'Bulb', 'living'),
+    bridge: dev('bridge', 'Hub', 'Bridge', 'living'),
+  }});
+  const res = buildDevices(baseCtx(h));
+  assert.deepEqual(res.map((d) => d.id), ['lamp'], 'a read-only client on an old config sees the old behaviour');
+  // and a hidden marker still removes the device entirely, as before
+  const res2 = buildDevices(baseCtx(h, { markers: [{ id: 'x', binding: 'device:lamp', hidden: true }] }));
+  assert.deepEqual(res2.map((d) => d.id), []);
+});
+
+test('hidden lights cast no visible light, but count toward LQI', () => {
+  const h = mkHass({
+    devices: {},
+    states: { 'light.a': { state: 'on', attributes: {} } },
+  });
+  const devices = [
+    { area: 'living', entities: ['light.a'], hidden: true },
+  ];
+  assert.equal(areaLights(h, devices, 'living'), 'none', 'an invisible device casts no visible light');
+  assert.equal(areaLightStats(h, devices, 'living'), null);
+});