diff --git a/apps/control-station/src/App.tsx b/apps/control-station/src/App.tsx
index b4ff40e..9c39cff 100644
--- a/apps/control-station/src/App.tsx
+++ b/apps/control-station/src/App.tsx
@@ -806,6 +806,8 @@ export default function App() {
                 <StatusBadge tone="neutral">Offline evaluation</StatusBadge>
               ) : activeDefinition.kind === "lab-archive" ? (
                 laboratoryAnnotation.control
+              ) : activeDefinition.kind === "observatory" ? (
+                <StatusBadge tone="neutral">Только наблюдение</StatusBadge>
               ) : activeDefinition.root === "system" ? (
                 <SystemWorkspaceSelector
                   value={activeDefinition.id}
diff --git a/apps/control-station/src/core/observatory/catalog.ts b/apps/control-station/src/core/observatory/catalog.ts
new file mode 100644
index 0000000..880e5ae
--- /dev/null
+++ b/apps/control-station/src/core/observatory/catalog.ts
@@ -0,0 +1,145 @@
+import {
+  fetchObservationSessionCatalog,
+  type ObservationLabInstance,
+  type ObservationSessionFetch,
+  type ObservationSessionSummary,
+} from "../observation/sessionArchive";
+
+export interface ObservatoryEvidence {
+  readonly sessionId: string;
+  readonly label: string;
+  readonly status: ObservationSessionSummary["status"];
+  readonly publishedAtUtc: string;
+  readonly lab: ObservationLabInstance;
+}
+
+export interface ObservatorySession {
+  readonly source: ObservationSessionSummary;
+  readonly evidence: readonly ObservatoryEvidence[];
+}
+
+export interface ObservatoryCatalog {
+  readonly items: readonly ObservatorySession[];
+  readonly unresolvedEvidence: readonly ObservatoryEvidence[];
+  readonly window: {
+    readonly limit: number;
+    readonly sourceCount: number;
+    readonly laboratoryCount: number;
+    readonly sourceLimitReached: boolean;
+    readonly laboratoryLimitReached: boolean;
+  };
+}
+
+export class ObservatoryCatalogContractError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = "ObservatoryCatalogContractError";
+  }
+}
+
+function newestFirst(left: string, right: string): number {
+  return Date.parse(right) - Date.parse(left);
+}
+
+function boundedLimit(limit: number): number {
+  return Number.isFinite(limit)
+    ? Math.min(100, Math.max(1, Math.floor(limit)))
+    : 100;
+}
+
+function evidenceFromSession(
+  session: ObservationSessionSummary,
+): ObservatoryEvidence {
+  if (!session.lab) {
+    throw new ObservatoryCatalogContractError(
+      `LAB-каталог вернул сессию ${session.id} без типизированной связи с источником.`,
+    );
+  }
+  return {
+    sessionId: session.id,
+    label: session.label,
+    status: session.status,
+    publishedAtUtc: session.lab.publishedAtUtc,
+    lab: session.lab,
+  };
+}
+
+function sortEvidence(
+  evidence: readonly ObservatoryEvidence[],
+): ObservatoryEvidence[] {
+  return [...evidence].sort((left, right) =>
+    newestFirst(left.publishedAtUtc, right.publishedAtUtc)
+      || left.sessionId.localeCompare(right.sessionId));
+}
+
+export function buildObservatoryCatalog(
+  sourceSessions: readonly ObservationSessionSummary[],
+  laboratorySessions: readonly ObservationSessionSummary[],
+  limit = 100,
+): ObservatoryCatalog {
+  const safeLimit = boundedLimit(limit);
+  const sources = new Map<string, ObservationSessionSummary>();
+  for (const source of sourceSessions) {
+    if (source.lab !== null) {
+      throw new ObservatoryCatalogContractError(
+        `Каталог источников вернул LAB-сессию ${source.id}.`,
+      );
+    }
+    sources.set(source.id, source);
+  }
+
+  const linked = new Map<string, ObservatoryEvidence[]>();
+  const unresolvedEvidence: ObservatoryEvidence[] = [];
+  for (const laboratorySession of laboratorySessions) {
+    const evidence = evidenceFromSession(laboratorySession);
+    const sourceId = evidence.lab.sourceSessionId;
+    if (!sources.has(sourceId)) {
+      // Both API projections are bounded newest-first windows without a
+      // cursor. Absence from the source window is not proof of a broken
+      // relationship and must not be presented as an integrity fault.
+      unresolvedEvidence.push(evidence);
+      continue;
+    }
+    const current = linked.get(sourceId) ?? [];
+    current.push(evidence);
+    linked.set(sourceId, current);
+  }
+
+  const items = [...sources.values()]
+    .sort((left, right) =>
+      newestFirst(left.startedAtUtc, right.startedAtUtc)
+        || left.id.localeCompare(right.id))
+    .map((source) => ({
+      source,
+      evidence: sortEvidence(linked.get(source.id) ?? []),
+    }));
+
+  return {
+    items,
+    unresolvedEvidence: sortEvidence(unresolvedEvidence),
+    window: {
+      limit: safeLimit,
+      sourceCount: sourceSessions.length,
+      laboratoryCount: laboratorySessions.length,
+      sourceLimitReached: sourceSessions.length >= safeLimit,
+      laboratoryLimitReached: laboratorySessions.length >= safeLimit,
+    },
+  };
+}
+
+export async function fetchObservatoryCatalog({
+  signal,
+  limit = 100,
+  fetcher = globalThis.fetch,
+}: {
+  signal?: AbortSignal;
+  limit?: number;
+  fetcher?: ObservationSessionFetch;
+} = {}): Promise<ObservatoryCatalog> {
+  const safeLimit = boundedLimit(limit);
+  const [sourceCatalog, laboratoryCatalog] = await Promise.all([
+    fetchObservationSessionCatalog({ signal, limit: safeLimit, scope: "source", fetcher }),
+    fetchObservationSessionCatalog({ signal, limit: safeLimit, scope: "laboratory", fetcher }),
+  ]);
+  return buildObservatoryCatalog(sourceCatalog.items, laboratoryCatalog.items, safeLimit);
+}
diff --git a/apps/control-station/src/core/observatory/useObservatoryCatalog.ts b/apps/control-station/src/core/observatory/useObservatoryCatalog.ts
new file mode 100644
index 0000000..84d7c27
--- /dev/null
+++ b/apps/control-station/src/core/observatory/useObservatoryCatalog.ts
@@ -0,0 +1,63 @@
+import { useCallback, useEffect, useRef, useState } from "react";
+
+import {
+  fetchObservatoryCatalog,
+  type ObservatoryCatalog,
+} from "./catalog";
+
+export type ObservatoryCatalogState =
+  | "idle"
+  | "loading"
+  | "ready"
+  | "refreshing"
+  | "error";
+
+export interface ObservatoryCatalogController {
+  readonly catalog: ObservatoryCatalog | null;
+  readonly state: ObservatoryCatalogState;
+  readonly error: string | null;
+  readonly refresh: () => void;
+}
+
+function errorMessage(error: unknown): string {
+  return error instanceof Error && error.message.trim()
+    ? error.message
+    : "Каталог Обсерватории недоступен.";
+}
+
+function isAbortError(error: unknown): boolean {
+  return error instanceof DOMException && error.name === "AbortError";
+}
+
+export function useObservatoryCatalog(): ObservatoryCatalogController {
+  const [catalog, setCatalog] = useState<ObservatoryCatalog | null>(null);
+  const [state, setState] = useState<ObservatoryCatalogState>("idle");
+  const [error, setError] = useState<string | null>(null);
+  const [generation, setGeneration] = useState(0);
+  const catalogRef = useRef<ObservatoryCatalog | null>(null);
+
+  useEffect(() => {
+    const controller = new AbortController();
+    setState(catalogRef.current ? "refreshing" : "loading");
+    setError(null);
+    void fetchObservatoryCatalog({ signal: controller.signal })
+      .then((next) => {
+        if (controller.signal.aborted) return;
+        catalogRef.current = next;
+        setCatalog(next);
+        setState("ready");
+      })
+      .catch((loadError: unknown) => {
+        if (controller.signal.aborted || isAbortError(loadError)) return;
+        setError(errorMessage(loadError));
+        setState("error");
+      });
+    return () => controller.abort();
+  }, [generation]);
+
+  const refresh = useCallback(() => {
+    setGeneration((current) => current + 1);
+  }, []);
+
+  return { catalog, state, error, refresh };
+}
diff --git a/apps/control-station/src/productModel.ts b/apps/control-station/src/productModel.ts
index fe83942..3b6575e 100644
--- a/apps/control-station/src/productModel.ts
+++ b/apps/control-station/src/productModel.ts
@@ -23,7 +23,8 @@ export type WorkspaceKind =
   | "datasets"
   | "artifact-health"
   | "lab-archive"
-  | "simulations";
+  | "simulations"
+  | "observatory";
 
 export type CapabilityStatus = "active" | "ready" | "contract" | "later";
 
@@ -166,6 +167,17 @@ export const workspaces: WorkspaceDefinition[] = [
     kind: "simulations",
     groups: [],
   },
+  {
+    id: "observatory",
+    root: "polygon",
+    label: "Обсерватория",
+    title: "Обсерватория восприятия",
+    eyebrow: "ТЕСТОВЫЙ КОНТУР / ОБСЕРВАТОРИЯ",
+    description: "Сессии и квалификация компьютерного зрения без доступа к управлению.",
+    icon: "eye",
+    kind: "observatory",
+    groups: [],
+  },
   {
     id: "contour-health",
     root: "fleet",
diff --git a/apps/control-station/src/styles.css b/apps/control-station/src/styles.css
index 4fc9d60..da07e55 100644
--- a/apps/control-station/src/styles.css
+++ b/apps/control-station/src/styles.css
@@ -21,6 +21,7 @@
 @import "./styles/device.css";
 @import "./styles/responsive.css";
 @import "./styles/observation.css";
+@import "./styles/observatory.css";
 @import "./styles/environment-settings.css";
 @import "./styles/system-telemetry.css";
 @import "./styles/artifact-health.css";
diff --git a/apps/control-station/src/styles/observatory.css b/apps/control-station/src/styles/observatory.css
new file mode 100644
index 0000000..f145b78
--- /dev/null
+++ b/apps/control-station/src/styles/observatory.css
@@ -0,0 +1,207 @@
+.observatory-workspace {
+  display: grid;
+  gap: 1rem;
+  min-width: 0;
+  min-height: 100%;
+  padding: 1rem;
+}
+
+.observatory-lead,
+.observatory-catalog-bar,
+.observatory-catalog-bar__controls,
+.observatory-notice,
+.observatory-session-summary > header,
+.observatory-evidence > header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.observatory-lead,
+.observatory-catalog-bar,
+.observatory-catalog-bar__controls,
+.observatory-notice {
+  flex-wrap: wrap;
+}
+
+.observatory-lead > div,
+.observatory-catalog-bar__copy,
+.observatory-session-summary header > div,
+.observatory-evidence header > div {
+  min-width: 0;
+}
+
+.observatory-lead h2,
+.observatory-catalog-bar h3,
+.observatory-session-summary h3,
+.observatory-evidence h3 {
+  margin: 0.3rem 0 0;
+}
+
+.observatory-lead p,
+.observatory-catalog-bar p,
+.observatory-state p,
+.observatory-evidence-empty p {
+  max-width: 52rem;
+  margin: 0.35rem 0 0;
+  color: var(--nodedc-text-muted);
+  line-height: 1.5;
+}
+
+.observatory-catalog-bar__copy {
+  flex: 1 1 auto;
+}
+
+.observatory-catalog-bar__controls {
+  flex: 1 1 32rem;
+  justify-content: flex-end;
+}
+
+.observatory-catalog-bar__controls .nodedc-select-anchor {
+  flex: 1 1 22rem;
+  min-width: min(28rem, 100%);
+}
+
+.observatory-state {
+  display: grid;
+  min-height: 19rem;
+  place-items: center;
+  align-content: center;
+  gap: 0.7rem;
+  text-align: center;
+}
+
+.observatory-state h3 {
+  max-width: 42rem;
+  margin: 0;
+}
+
+.observatory-session-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(min(24rem, 100%), 1fr));
+  gap: 1rem;
+  align-items: start;
+}
+
+.observatory-session-summary,
+.observatory-evidence {
+  display: grid;
+  gap: 1rem;
+}
+
+.observatory-session-summary dl,
+.observatory-evidence-list dl {
+  display: grid;
+  gap: 0.75rem;
+  margin: 0;
+}
+
+.observatory-session-summary dl > div,
+.observatory-evidence-list dl > div {
+  display: grid;
+  grid-template-columns: minmax(7.5rem, 0.42fr) minmax(0, 1fr);
+  gap: 0.85rem;
+  align-items: baseline;
+}
+
+.observatory-session-summary dt,
+.observatory-evidence-list dt {
+  color: var(--nodedc-text-muted);
+  font-size: var(--nodedc-font-size-xs);
+}
+
+.observatory-session-summary dd,
+.observatory-evidence-list dd {
+  min-width: 0;
+  margin: 0;
+  overflow-wrap: anywhere;
+  color: var(--nodedc-text-secondary);
+}
+
+.observatory-session-summary code,
+.observatory-evidence-list code {
+  font-size: var(--nodedc-font-size-xs);
+}
+
+.observatory-modalities {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.45rem;
+  align-items: center;
+  color: var(--nodedc-text-muted);
+}
+
+.observatory-evidence-list {
+  display: grid;
+  gap: 0.75rem;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.observatory-evidence-card {
+  display: grid;
+  gap: 0.85rem;
+}
+
+.observatory-evidence-list strong,
+.observatory-evidence-list span {
+  display: block;
+}
+
+.observatory-evidence-list span {
+  margin-top: 0.25rem;
+  color: var(--nodedc-text-muted);
+  font-size: var(--nodedc-font-size-sm);
+}
+
+.observatory-evidence-empty {
+  display: grid;
+  min-height: 13rem;
+  place-items: center;
+  align-content: center;
+  gap: 0.55rem;
+  text-align: center;
+}
+
+.observatory-evidence__bounded-note {
+  margin: 0;
+  color: var(--nodedc-text-muted);
+  font-size: var(--nodedc-font-size-xs);
+  line-height: 1.45;
+}
+
+.observatory-notice {
+  justify-content: flex-start;
+  color: var(--nodedc-text-secondary);
+}
+
+.observatory-notice__copy {
+  min-width: 0;
+  flex: 1 1 auto;
+}
+
+@media (max-width: 920px) {
+  .observatory-lead,
+  .observatory-catalog-bar,
+  .observatory-catalog-bar__controls,
+  .observatory-notice {
+    align-items: stretch;
+    flex-direction: column;
+  }
+
+  .observatory-catalog-bar__controls {
+    flex-basis: auto;
+  }
+
+  .observatory-catalog-bar__controls .nodedc-select-anchor {
+    flex: 0 0 auto;
+    width: 100%;
+    min-width: 0;
+  }
+
+  .observatory-session-grid {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
diff --git a/apps/control-station/src/workspaces/Workspaces.tsx b/apps/control-station/src/workspaces/Workspaces.tsx
index 552b7d3..e2fdfd9 100644
--- a/apps/control-station/src/workspaces/Workspaces.tsx
+++ b/apps/control-station/src/workspaces/Workspaces.tsx
@@ -41,6 +41,7 @@ import { SimulationWorkspace } from "./simulation/SimulationWorkspace";
 import { ComputeModulesWorkspace } from "./system/ComputeModulesWorkspace";
 import { NetworkWorkspace } from "./system/NetworkWorkspace";
 import { WorldMapWorkspace } from "./map/WorldMapWorkspace";
+import { ObservatoryWorkspace } from "./observatory/ObservatoryWorkspace";
 function statusTone(status: CapabilityStatus): "success" | "accent" | "warning" | "neutral" {
   if (status === "active") return "success";
   if (status === "ready") return "accent";
@@ -1191,6 +1192,8 @@ export function WorkspaceRenderer(props: WorkspaceRendererProps) {
       );
     case "simulations":
       return <SimulationWorkspace />;
+    case "observatory":
+      return <ObservatoryWorkspace definition={props.definition} />;
     case "device":
       return null;
   }
diff --git a/apps/control-station/src/workspaces/observatory/ObservatoryWorkspace.tsx b/apps/control-station/src/workspaces/observatory/ObservatoryWorkspace.tsx
new file mode 100644
index 0000000..0d23d4a
--- /dev/null
+++ b/apps/control-station/src/workspaces/observatory/ObservatoryWorkspace.tsx
@@ -0,0 +1,291 @@
+import { useEffect, useMemo, useState } from "react";
+import {
+  ActivityIndicator,
+  Button,
+  GlassSurface,
+  Icon,
+  Select,
+  StatusBadge,
+} from "@nodedc/ui-react";
+
+import type { ObservationSessionStatus } from "../../core/observation/sessionArchive";
+import { useObservatoryCatalog } from "../../core/observatory/useObservatoryCatalog";
+import type { WorkspaceDefinition } from "../../productModel";
+
+const MAX_PRESENTED_EVIDENCE = 6;
+
+const statusLabel: Record<ObservationSessionStatus, string> = {
+  recording: "Запись идёт",
+  ready: "Готова",
+  degraded: "С деградацией",
+  interrupted: "Прервана",
+  failed: "Ошибка",
+};
+
+const modalityLabel: Record<string, string> = {
+  "point-cloud": "Облако точек",
+  pose: "Поза",
+  trajectory: "Траектория",
+  video: "Видео",
+  image: "Изображения",
+  depth: "Глубина",
+  telemetry: "Телеметрия",
+};
+
+function statusTone(
+  status: ObservationSessionStatus,
+): "success" | "accent" | "warning" | "danger" | "neutral" {
+  if (status === "ready") return "success";
+  if (status === "recording") return "accent";
+  if (status === "degraded" || status === "interrupted") return "warning";
+  return "danger";
+}
+
+function formatTimestamp(value: string): string {
+  return new Intl.DateTimeFormat("ru-RU", {
+    dateStyle: "medium",
+    timeStyle: "short",
+  }).format(new Date(value));
+}
+
+function formatDuration(seconds: number): string {
+  const totalSeconds = Math.max(0, Math.round(seconds));
+  const hours = Math.floor(totalSeconds / 3_600);
+  const minutes = Math.floor((totalSeconds % 3_600) / 60);
+  const remainingSeconds = totalSeconds % 60;
+  return hours > 0
+    ? `${hours}:${String(minutes).padStart(2, "0")}:${String(remainingSeconds).padStart(2, "0")}`
+    : `${minutes}:${String(remainingSeconds).padStart(2, "0")}`;
+}
+
+function catalogStateLabel(
+  state: ReturnType<typeof useObservatoryCatalog>["state"],
+): string {
+  if (state === "ready") return "Срез актуален";
+  if (state === "refreshing") return "Обновляем каталог";
+  if (state === "error") return "Каталог недоступен";
+  return "Читаем каталог";
+}
+
+export function ObservatoryWorkspace({
+  definition,
+}: {
+  definition: WorkspaceDefinition;
+}) {
+  const controller = useObservatoryCatalog();
+  const [selectedSessionId, setSelectedSessionId] = useState("");
+  const items = controller.catalog?.items ?? [];
+
+  useEffect(() => {
+    if (items.some((item) => item.source.id === selectedSessionId)) return;
+    setSelectedSessionId(items[0]?.source.id ?? "");
+  }, [items, selectedSessionId]);
+
+  const selectedSession = items.find(
+    (item) => item.source.id === selectedSessionId,
+  ) ?? null;
+  const presentedEvidence = selectedSession?.evidence.slice(
+    0,
+    MAX_PRESENTED_EVIDENCE,
+  ) ?? [];
+  const options = useMemo(() => items.map(({ source, evidence }) => ({
+    value: source.id,
+    label: source.label,
+    description: `${formatTimestamp(source.startedAtUtc)} · ${formatDuration(source.durationSeconds)} · ${evidence.length} результатов`,
+  })), [items]);
+  const initialLoading = !controller.catalog
+    && ["idle", "loading"].includes(controller.state);
+  const unavailable = !controller.catalog && controller.state === "error";
+
+  return (
+    <div
+      className="observatory-workspace"
+      data-observatory-authority="observation-only"
+      data-observatory-viewer="detached"
+    >
+      <section className="observatory-lead">
+        <div>
+          <span className="section-eyebrow">{definition.eyebrow}</span>
+          <h2>{definition.title}</h2>
+          <p>
+            Записанные источники и строго связанные результаты без запуска тяжёлого
+            визуализатора и без доступа к управлению аппаратом.
+          </p>
+        </div>
+        <StatusBadge
+          tone={controller.state === "error" ? "danger" : controller.state === "ready" ? "success" : "neutral"}
+        >
+          {catalogStateLabel(controller.state)}
+        </StatusBadge>
+      </section>
+
+      <GlassSurface className="observatory-catalog-bar" padding="lg">
+        <div className="observatory-catalog-bar__copy">
+          <span className="section-eyebrow">ИСТОЧНИК ДОКАЗАТЕЛЬСТВ</span>
+          <h3>Сохранённая сессия</h3>
+          <p>Выбор меняет только читаемую карточку и не готовит Rerun-запись в фоне.</p>
+        </div>
+        <div className="observatory-catalog-bar__controls">
+          <Select
+            label="Выбрать сохранённую сессию"
+            value={selectedSessionId}
+            options={options}
+            disabled={items.length === 0}
+            searchable
+            searchPlaceholder="Поиск по сессиям"
+            emptyLabel="Сессия не найдена"
+            minMenuWidth={360}
+            menuWidth={460}
+            onChange={setSelectedSessionId}
+          />
+          <Button
+            size="compact"
+            variant="secondary"
+            disabled={controller.state === "loading" || controller.state === "refreshing"}
+            icon={<Icon name="refresh" />}
+            onClick={controller.refresh}
+          >
+            Обновить
+          </Button>
+        </div>
+      </GlassSurface>
+
+      {controller.error && controller.catalog ? (
+        <GlassSurface className="observatory-notice" padding="md" tone="soft" role="alert">
+          <StatusBadge tone="warning">Показан последний срез</StatusBadge>
+          <span className="observatory-notice__copy">{controller.error}</span>
+          <Button size="compact" variant="ghost" onClick={controller.refresh}>Повторить</Button>
+        </GlassSurface>
+      ) : null}
+
+      {controller.catalog
+      && (controller.catalog.window.sourceLimitReached
+        || controller.catalog.window.laboratoryLimitReached) ? (
+        <GlassSurface className="observatory-notice" padding="md" tone="soft" role="status">
+          <StatusBadge tone="warning">Срез ограничен</StatusBadge>
+          <span className="observatory-notice__copy">
+            Загружены последние {controller.catalog.window.sourceCount} исходных сессий и{
+              " "
+            }{controller.catalog.window.laboratoryCount} LAB-результатов. Полнота исторических
+            связей не подтверждена.
+          </span>
+        </GlassSurface>
+      ) : null}
+
+      {initialLoading ? (
+        <GlassSurface className="observatory-state" padding="lg">
+          <ActivityIndicator label="Читаем каталог сессий" />
+          <h3>Читаем источники и связи результатов</h3>
+          <p>Визуализатор и лабораторные сцены при этом не запускаются.</p>
+        </GlassSurface>
+      ) : unavailable ? (
+        <GlassSurface className="observatory-state" padding="lg" role="alert">
+          <Icon name="alert" size={20} />
+          <StatusBadge tone="danger">Каталог недоступен</StatusBadge>
+          <h3>{controller.error}</h3>
+          <Button size="compact" variant="secondary" onClick={controller.refresh}>Повторить</Button>
+        </GlassSurface>
+      ) : items.length === 0 ? (
+        <GlassSurface className="observatory-state" padding="lg">
+          <Icon name="database" size={20} />
+          <h3>Сохранённых сессий пока нет</h3>
+          <p>После завершения записи источник появится здесь без создания демонстрационных данных.</p>
+        </GlassSurface>
+      ) : selectedSession ? (
+        <section className="observatory-session-grid" aria-label="Выбранная сессия и связанные результаты">
+          <GlassSurface className="observatory-session-summary" padding="lg">
+            <header>
+              <div>
+                <span className="section-eyebrow">ИСХОДНАЯ СЕССИЯ</span>
+                <h3>{selectedSession.source.label}</h3>
+              </div>
+              <StatusBadge tone={statusTone(selectedSession.source.status)}>
+                {statusLabel[selectedSession.source.status]}
+              </StatusBadge>
+            </header>
+            <dl>
+              <div>
+                <dt>Идентификатор</dt>
+                <dd><code>{selectedSession.source.id}</code></dd>
+              </div>
+              <div><dt>Начало</dt><dd>{formatTimestamp(selectedSession.source.startedAtUtc)}</dd></div>
+              <div><dt>Длительность</dt><dd>{formatDuration(selectedSession.source.durationSeconds)}</dd></div>
+              <div>
+                <dt>Чтение</dt>
+                <dd>{selectedSession.source.replayable ? "Доступна" : "Не подготовлена"}</dd>
+              </div>
+            </dl>
+            <div className="observatory-modalities" aria-label="Каналы сессии">
+              {selectedSession.source.modalities.length > 0
+                ? selectedSession.source.modalities.map((modality) => (
+                    <StatusBadge key={modality} tone="neutral">
+                      {modalityLabel[modality] ?? modality}
+                    </StatusBadge>
+                  ))
+                : <span>Каналы не зафиксированы</span>}
+            </div>
+          </GlassSurface>
+
+          <GlassSurface className="observatory-evidence" padding="lg">
+            <header>
+              <div>
+                <span className="section-eyebrow">СВЯЗАННЫЕ РЕЗУЛЬТАТЫ</span>
+                <h3>Лабораторные доказательства</h3>
+              </div>
+              <StatusBadge tone={selectedSession.evidence.length > 0 ? "accent" : "neutral"}>
+                {selectedSession.evidence.length}
+              </StatusBadge>
+            </header>
+            {selectedSession.evidence.length > 0 ? (
+              <ol className="observatory-evidence-list">
+                {presentedEvidence.map((evidence) => (
+                  <li key={evidence.sessionId}>
+                    <GlassSurface className="observatory-evidence-card" padding="md" tone="soft">
+                      <div>
+                        <strong>{evidence.lab.labId}</strong>
+                        <span>{evidence.label}</span>
+                      </div>
+                      <dl>
+                        <div><dt>Тип результата</dt><dd>{evidence.lab.resultKind}</dd></div>
+                        <div>
+                          <dt>Result ID</dt>
+                          <dd><code>{evidence.lab.resultId}</code></dd>
+                        </div>
+                        <div><dt>Опубликован</dt><dd>{formatTimestamp(evidence.publishedAtUtc)}</dd></div>
+                      </dl>
+                    </GlassSurface>
+                  </li>
+                ))}
+              </ol>
+            ) : (
+              <div className="observatory-evidence-empty">
+                <Icon name="clipboard" size={18} />
+                <strong>Связанных результатов нет</strong>
+                <p>
+                  Наличие исходной записи само по себе не является выводом о качестве
+                  компьютерного зрения или безопасности прохождения.
+                </p>
+              </div>
+            )}
+            {selectedSession.evidence.length > presentedEvidence.length ? (
+              <p className="observatory-evidence__bounded-note">
+                Показаны {presentedEvidence.length} последних из {selectedSession.evidence.length}
+                {" "}связанных результатов. Полный архив остаётся в legacy LAB.
+              </p>
+            ) : null}
+          </GlassSurface>
+        </section>
+      ) : null}
+
+      {(controller.catalog?.unresolvedEvidence.length ?? 0) > 0 ? (
+        <GlassSurface className="observatory-notice" padding="md" tone="soft" role="status">
+          <StatusBadge tone="warning">Вне среза</StatusBadge>
+          <span className="observatory-notice__copy">
+            {controller.catalog?.unresolvedEvidence.length} результатов ссылаются на источники
+            вне текущего загруженного среза и не приписаны к квалификационным доказательствам.
+          </span>
+        </GlassSurface>
+      ) : null}
+    </div>
+  );
+}
diff --git a/apps/control-station/test/applicationArchitecture.test.mjs b/apps/control-station/test/applicationArchitecture.test.mjs
index 882729a..c8bfb92 100644
--- a/apps/control-station/test/applicationArchitecture.test.mjs
+++ b/apps/control-station/test/applicationArchitecture.test.mjs
@@ -104,3 +104,27 @@ test("laboratory UI is a bounded feature slice, not a central workspace branch",
   assert.doesNotMatch(laboratoryCss, /\.e30-human-review/);
   assert.match(e30HumanReviewCss, /\.e30-human-review/);
 });
+
+test("Observatory is a bounded read-only slice outside legacy LAB and viewer lifecycles", async () => {
+  const workspaceHub = await read("workspaces/Workspaces.tsx");
+  const observatory = await read("workspaces/observatory/ObservatoryWorkspace.tsx");
+  const observatoryCore = await read("core/observatory/catalog.ts");
+  const workspaceCss = await read("styles/workspaces.css");
+  const observatoryCss = await read("styles/observatory.css");
+
+  assert.match(
+    workspaceHub,
+    /case "observatory":[\s\S]*<ObservatoryWorkspace definition=\{props\.definition\} \/>/,
+  );
+  assert.match(observatory, /export function ObservatoryWorkspace/);
+  assert.match(observatory, /useObservatoryCatalog/);
+  assert.match(observatory, /data-observatory-authority="observation-only"/);
+  assert.match(observatory, /data-observatory-viewer="detached"/);
+  assert.doesNotMatch(
+    `${observatory}\n${observatoryCore}`,
+    /(?:core|components|workspaces)\/laboratory|\/api\/v1\/laboratory|RerunViewport|ObservationSessionSelect/,
+  );
+  assert.doesNotMatch(observatory, /replayObservationSession|deleteObservationSession/);
+  assert.doesNotMatch(workspaceCss, /\.observatory-/);
+  assert.match(observatoryCss, /\.observatory-workspace/);
+});
diff --git a/apps/control-station/test/observatoryCatalog.test.mjs b/apps/control-station/test/observatoryCatalog.test.mjs
new file mode 100644
index 0000000..17c18a4
--- /dev/null
+++ b/apps/control-station/test/observatoryCatalog.test.mjs
@@ -0,0 +1,159 @@
+import assert from "node:assert/strict";
+import { after, before, test } from "node:test";
+
+import { createServer } from "vite";
+
+let server;
+let buildObservatoryCatalog;
+let fetchObservatoryCatalog;
+let ObservatoryCatalogContractError;
+
+before(async () => {
+  server = await createServer({
+    appType: "custom",
+    logLevel: "silent",
+    server: { middlewareMode: true },
+  });
+  ({
+    buildObservatoryCatalog,
+    fetchObservatoryCatalog,
+    ObservatoryCatalogContractError,
+  } = await server.ssrLoadModule("/src/core/observatory/catalog.ts"));
+});
+
+after(async () => {
+  await server?.close();
+});
+
+function source(id, startedAtUtc) {
+  return {
+    id,
+    label: `Источник ${id}`,
+    startedAtUtc,
+    completedAtUtc: startedAtUtc,
+    status: "ready",
+    modalities: ["point-cloud", "video"],
+    durationSeconds: 42,
+    replayable: true,
+    preparation: null,
+    lab: null,
+  };
+}
+
+function evidence(id, sourceSessionId, publishedAtUtc) {
+  return {
+    id,
+    label: `Результат ${id}`,
+    startedAtUtc: publishedAtUtc,
+    completedAtUtc: publishedAtUtc,
+    status: "ready",
+    modalities: ["video"],
+    durationSeconds: 12,
+    replayable: true,
+    preparation: null,
+    lab: {
+      labId: `LAB-${id}`,
+      sourceSessionId,
+      resultKind: "recorded-evidence",
+      resultId: `result-${id}`,
+      sourceResultId: null,
+      configSha256: "a".repeat(64),
+      runCreatedAtUtc: publishedAtUtc,
+      publishedAtUtc,
+      provenance: { verdict: "must-not-be-inferred" },
+    },
+  };
+}
+
+test("Observatory joins evidence only by sourceSessionId and keeps deterministic order", () => {
+  const catalog = buildObservatoryCatalog(
+    [
+      source("older", "2026-08-28T10:00:00Z"),
+      source("newer", "2026-08-29T10:00:00Z"),
+    ],
+    [
+      evidence("old-result", "newer", "2026-08-29T11:00:00Z"),
+      evidence("new-result", "newer", "2026-08-29T12:00:00Z"),
+      evidence("orphan", "missing", "2026-08-29T13:00:00Z"),
+    ],
+  );
+
+  assert.deepEqual(catalog.items.map(({ source: item }) => item.id), ["newer", "older"]);
+  assert.deepEqual(
+    catalog.items[0].evidence.map((item) => item.sessionId),
+    ["new-result", "old-result"],
+  );
+  assert.deepEqual(catalog.unresolvedEvidence.map((item) => item.sessionId), ["orphan"]);
+  assert.deepEqual(catalog.window, {
+    limit: 100,
+    sourceCount: 2,
+    laboratoryCount: 3,
+    sourceLimitReached: false,
+    laboratoryLimitReached: false,
+  });
+  assert.equal("verdict" in catalog.items[0].evidence[0], false);
+  assert.equal(catalog.items[1].evidence.length, 0);
+});
+
+test("Observatory fails visibly when the laboratory projection loses its typed link", () => {
+  assert.throws(
+    () => buildObservatoryCatalog(
+      [source("source", "2026-08-29T10:00:00Z")],
+      [source("not-lab", "2026-08-29T11:00:00Z")],
+    ),
+    ObservatoryCatalogContractError,
+  );
+});
+
+test("Observatory fetches disjoint read-only source and laboratory projections", async () => {
+  const calls = [];
+  const fetcher = async (input, init) => {
+    calls.push({ input: String(input), method: init?.method });
+    return new Response(JSON.stringify({ items: [] }), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    });
+  };
+
+  const catalog = await fetchObservatoryCatalog({ fetcher, limit: 50 });
+  assert.deepEqual(catalog, {
+    items: [],
+    unresolvedEvidence: [],
+    window: {
+      limit: 50,
+      sourceCount: 0,
+      laboratoryCount: 0,
+      sourceLimitReached: false,
+      laboratoryLimitReached: false,
+    },
+  });
+  assert.deepEqual(
+    calls.map(({ input }) => input).sort(),
+    [
+      "/api/v1/observation-sessions?limit=50&scope=laboratory",
+      "/api/v1/observation-sessions?limit=50&scope=source",
+    ],
+  );
+  assert.deepEqual(new Set(calls.map(({ method }) => method)), new Set(["GET"]));
+});
+
+test("Observatory exposes bounded-window uncertainty without inventing a broken link", () => {
+  const catalog = buildObservatoryCatalog(
+    [
+      source("newer", "2026-08-29T10:00:00Z"),
+      source("older", "2026-08-28T10:00:00Z"),
+    ],
+    [
+      evidence("linked", "newer", "2026-08-29T11:00:00Z"),
+      evidence("outside-window", "older-than-window", "2026-08-29T12:00:00Z"),
+    ],
+    2,
+  );
+
+  assert.equal(catalog.window.sourceLimitReached, true);
+  assert.equal(catalog.window.laboratoryLimitReached, true);
+  assert.deepEqual(
+    catalog.unresolvedEvidence.map((item) => item.sessionId),
+    ["outside-window"],
+  );
+});
diff --git a/apps/control-station/test/observatoryWorkspace.test.mjs b/apps/control-station/test/observatoryWorkspace.test.mjs
new file mode 100644
index 0000000..73ac9a4
--- /dev/null
+++ b/apps/control-station/test/observatoryWorkspace.test.mjs
@@ -0,0 +1,84 @@
+import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
+import { after, before, test } from "node:test";
+
+import { createServer } from "vite";
+
+let server;
+let productModel;
+
+before(async () => {
+  server = await createServer({
+    appType: "custom",
+    logLevel: "silent",
+    server: { middlewareMode: true },
+  });
+  productModel = await server.ssrLoadModule("/src/productModel.ts");
+});
+
+after(async () => {
+  await server?.close();
+});
+
+async function read(relativePath) {
+  return readFile(new URL(`../src/${relativePath}`, import.meta.url), "utf8");
+}
+
+test("Observatory is the third independent Polygon workspace", () => {
+  assert.deepEqual(
+    productModel.workspacesForRoot("polygon").map(({ id }) => id),
+    ["lab-archive", "simulations", "observatory"],
+  );
+  assert.deepEqual(
+    productModel.workspaceById("observatory"),
+    {
+      id: "observatory",
+      root: "polygon",
+      label: "Обсерватория",
+      title: "Обсерватория восприятия",
+      eyebrow: "ТЕСТОВЫЙ КОНТУР / ОБСЕРВАТОРИЯ",
+      description: "Сессии и квалификация компьютерного зрения без доступа к управлению.",
+      icon: "eye",
+      kind: "observatory",
+      groups: [],
+    },
+  );
+  assert.equal(productModel.workspaceById("lab-archive").kind, "lab-archive");
+});
+
+test("Observatory reads catalog evidence without inheriting replay or LAB composition", async () => {
+  const [app, workspaceHub, workspace, hook, viewerProfiles, styles] = await Promise.all([
+    read("App.tsx"),
+    read("workspaces/Workspaces.tsx"),
+    read("workspaces/observatory/ObservatoryWorkspace.tsx"),
+    read("core/observatory/useObservatoryCatalog.ts"),
+    read("core/observation/viewerProfile.ts"),
+    read("styles/observatory.css"),
+  ]);
+
+  assert.match(app, /activeDefinition\.kind === "observatory"[\s\S]*Только наблюдение/);
+  assert.doesNotMatch(app, /\["recordings", "lab-archive", "observatory"\]/);
+  assert.match(workspaceHub, /case "observatory":[\s\S]*<ObservatoryWorkspace/);
+  assert.match(workspace, /useObservatoryCatalog/);
+  assert.match(workspace, /Связанных результатов нет/);
+  assert.match(workspace, /не является выводом о качестве/);
+  assert.match(workspace, /\.evidence\.slice\([\s\S]*MAX_PRESENTED_EVIDENCE/);
+  assert.match(workspace, /Полный архив остаётся в legacy LAB/);
+  assert.match(workspace, /Полнота исторических/);
+  assert.match(workspace, /вне текущего загруженного среза/);
+  assert.match(workspace, /observatory-notice__copy/);
+  assert.match(workspace, /observatory-evidence-card/);
+  assert.doesNotMatch(workspace, /Нарушена связь|compactIdentity/);
+  assert.doesNotMatch(
+    `${workspace}\n${hook}`,
+    /RerunViewport|ObservationSessionSelect|resolveObservationSessionReplay|deleteObservationSession|setInterval|setTimeout/,
+  );
+  assert.match(viewerProfiles, /kind: "live-acquisition"/);
+  assert.match(viewerProfiles, /kind: "recorded-session"/);
+  assert.match(viewerProfiles, /kind: "lab-recorded-evidence"/);
+  assert.match(
+    styles,
+    /@media \(max-width: 920px\)[\s\S]*\.observatory-catalog-bar__controls \.nodedc-select-anchor \{[\s\S]*flex: 0 0 auto;/,
+  );
+  assert.doesNotMatch(styles, /nodedc-glass-surface|nodedc-status-badge/);
+});
diff --git a/apps/control-station/test/polygonRunArchive.test.mjs b/apps/control-station/test/polygonRunArchive.test.mjs
index 99afad5..d397718 100644
--- a/apps/control-station/test/polygonRunArchive.test.mjs
+++ b/apps/control-station/test/polygonRunArchive.test.mjs
@@ -324,7 +324,7 @@ test("Polygon exposes one dataset surface and keeps legacy links compatible", ()
   assert.equal(workspaceById("datasets").kind, "datasets");
   assert.deepEqual(
     workspacesForRoot("polygon").map(({ id }) => id),
-    ["lab-archive", "simulations"],
+    ["lab-archive", "simulations", "observatory"],
   );
   assert.equal(
     workspacesForRoot("system").some(({ id }) => id === "polygon-run"),
diff --git a/apps/control-station/test/productShellContract.test.mjs b/apps/control-station/test/productShellContract.test.mjs
index 09f4918..d3d8266 100644
--- a/apps/control-station/test/productShellContract.test.mjs
+++ b/apps/control-station/test/productShellContract.test.mjs
@@ -27,6 +27,19 @@ test("top navigation has no Center and Park owns contour health first", () => {
   );
   assert.equal(productModel.workspacesForRoot("fleet")[0]?.id, "contour-health");
   assert.equal(productModel.workspaceById("contour-health")?.root, "fleet");
+  assert.deepEqual(
+    productModel.workspacesForRoot("polygon").map(({ id }) => id),
+    ["lab-archive", "simulations", "observatory"],
+  );
+  assert.equal(productModel.workspaceById("lab-archive")?.kind, "lab-archive");
+  assert.deepEqual(
+    {
+      root: productModel.workspaceById("observatory")?.root,
+      kind: productModel.workspaceById("observatory")?.kind,
+      icon: productModel.workspaceById("observatory")?.icon,
+    },
+    { root: "polygon", kind: "observatory", icon: "eye" },
+  );
 });
 
 test("every laboratory result uses the shared evidence template", async () => {
diff --git a/docs/24_M5_1_OBSERVATORY_SURFACE_BRIEF.md b/docs/24_M5_1_OBSERVATORY_SURFACE_BRIEF.md
new file mode 100644
index 0000000..5c6596b
--- /dev/null
+++ b/docs/24_M5_1_OBSERVATORY_SURFACE_BRIEF.md
@@ -0,0 +1,93 @@
+# Observatory — product-surface brief
+
+Status: accepted by the product owner for the first M5.1 vertical slice on 2026-08-30.
+
+## Operator and job story
+
+The operator is an engineer qualifying the perception stack before any control authority is put on
+an unmanned platform. After a source session has been recorded, the engineer needs one lightweight
+place to identify that immutable source and see which laboratory results are actually linked to it.
+The first slice is used repeatedly while recordings and results are being produced; it is not a
+mission-planning surface and it never sends navigation, braking or actuation commands.
+
+## Placement decision
+
+The accepted placement is `Тестировочный контур → Обсерватория`, with the operator-facing
+description `Сессии и квалификация`. It is a third workspace alongside the existing
+`Лабораторные контуры` and `Симуляции` entries.
+
+Alternatives considered:
+
+1. Replace or refactor `Лабораторные контуры` in place. Rejected for M5.1 because the current LAB
+   archive is a working, documented legacy projector and rollback reference.
+2. Add an Observatory mode to `Данные → Сессии и записи`. Rejected because that surface owns
+   storage and replay, while Observatory owns the recurring qualification-review job.
+3. Add a dedicated workspace under `Тестировочный контур`. Selected because it creates a clean
+   composition boundary without changing K1, Simulation or the legacy LAB lifecycle.
+
+## Entity, evidence and authority
+
+The source entity is an immutable observation Session. Its visible facts are limited to the
+validated Session catalog contract: identity, timestamps, status, duration, modalities and
+readability. Laboratory evidence is linked only by the typed `lab.sourceSessionId` relationship.
+Source and LAB projections are independent bounded newest-first windows. A LAB result whose source
+is absent from the loaded source window remains unresolved and visible as `вне среза`; it is never
+attached heuristically and its absence is not presented as a broken relationship. Reaching the
+100-item boundary marks historical completeness as unknown until cursor pagination exists.
+
+The presence of a Session or linked LAB result is not a computer-vision pass and is not evidence of
+safe navigation. M5.1 does not infer a verdict from provenance, labels or result kind. The workspace
+is observation-only: command, navigation and safety authority are all absent.
+
+## Viewer-profile boundary
+
+The existing source-specific viewer contracts remain separate and unchanged:
+
+| Source job | Existing profile | Clock / load ownership |
+| --- | --- | --- |
+| Live equipment | `live-acquisition` | `stream_time`; live receiver and recovery authority |
+| Historical Sessions | `recorded-session` | `session_time`; explicit preparation and progressive admission |
+| Legacy LAB evidence | `lab-recorded-evidence` | `source-sequence`; explicit comparison-only loading |
+
+Canonical LAB compositions may configure the recorded Rerun engine inside the bounded LAB slice,
+but that does not make Observatory a LAB or live consumer. The first Observatory slice mounts no
+viewer at all. A later viewer slice may activate only the historical `recorded-session` profile
+after an explicit Session selection and a separate acceptance proof. It must not add a fourth
+profile or silently collapse the three existing lifecycles.
+
+## Information hierarchy and states
+
+1. Catalog authority and refresh state.
+2. Explicit source Session selection.
+3. Selected Session identity, timing, modalities and readability.
+4. Strictly linked immutable LAB evidence.
+5. Fail-visible bounded-window and unresolved-evidence status.
+
+The admitted states are initial loading, ready with items, ready empty, refreshing with the last
+valid snapshot, and unavailable/error with retry. If a selected Session disappears after refresh,
+selection moves to the first valid source or to the empty state. No demo rows, fabricated progress,
+placeholder actions or hidden polling are allowed.
+
+## Design Guideline composition
+
+The existing `ApplicationShell`, `AdminNavigationPanel` and `ApplicationPanel` composition remains
+the owner of navigation and workspace framing. The feature reuses canonical `Select`, `Button`,
+`Icon`, `StatusBadge`, `GlassSurface` and `ActivityIndicator` primitives. The semantic Session and
+evidence projection belongs to `workspaces/observatory`; feature styles own layout only and do not
+introduce a parallel control or surface grammar. The registered `eye` icon identifies the new
+workspace.
+
+## First-slice acceptance
+
+- Polygon navigation order is `Лабораторные контуры → Симуляции → Обсерватория`.
+- Opening Observatory loads only the typed source and laboratory Session catalogs.
+- Opening Observatory mounts no Rerun, canvas, WebGL, RRD, WebSocket or LAB result route.
+- Source and LAB records are joined only by `sourceSessionId`; evidence outside the independently
+  bounded source window remains visible as unresolved and never becomes a false integrity verdict.
+- Reaching either 100-item catalog boundary explicitly marks historical completeness as unknown.
+- The selected source presents at most six newest linked results while retaining the exact total;
+  the historical tail remains in legacy LAB and is never mounted into a long Observatory DOM.
+- Loading, empty, refreshing, error/retry and ready states contain no synthetic data.
+- Linked evidence is never presented as a CV or safety pass.
+- Existing LAB, Simulation, K1 and Data/Sessions code paths remain unchanged.
+- Live, historical Session and legacy LAB viewer-profile contracts remain distinct.