diff --git a/ordinis-admin-ui/src/api/client.ts b/ordinis-admin-ui/src/api/client.ts
index 2d2a55f..299eed0 100644
--- a/ordinis-admin-ui/src/api/client.ts
+++ b/ordinis-admin-ui/src/api/client.ts
@@ -794,6 +794,15 @@ export type SchemaTemplateDetail = SchemaTemplateSummary & {
   schemaJson: unknown
 }
 
+/**
+ * AI Schema Assist suggest-field response. Shape должен matchить
+ * AiSchemaController output (parsed LLM JSON: {fieldName, schema}).
+ */
+export type AiFieldSuggestion = {
+  fieldName: string
+  schema: Record<string, unknown>
+}
+
 /**
  * Empty-state hint payload (read-api scheduled-summary). Подсчёт записей с
  * {@code validFrom > now AND validTo > now} в текущем scope view.
diff --git a/ordinis-admin-ui/src/api/mutations.ts b/ordinis-admin-ui/src/api/mutations.ts
index d81d37e..111eb09 100644
--- a/ordinis-admin-ui/src/api/mutations.ts
+++ b/ordinis-admin-ui/src/api/mutations.ts
@@ -2,6 +2,7 @@ import { useCallback, useRef } from 'react'
 import { useMutation, useQueryClient } from '@tanstack/react-query'
 import {
   apiClient,
+  type AiFieldSuggestion,
   type BulkCloseRequest,
   type BulkCloseResponse,
   type CascadeCloseResult,
@@ -741,3 +742,28 @@ export const useUpdateNotificationPreferences = () => {
     },
   })
 }
+
+/**
+ * AI Schema Assist — per-field suggest. Returns parsed {fieldName, schema}.
+ * Каллер показывает diff preview, user accept/edit/reject.
+ *
+ * 404 → AI disabled на бэкенде — frontend hides button (handled в caller).
+ * 503/circuit_open → temporary unavailable, show banner.
+ * 422 → bad output from LLM — show error message, suggest retry.
+ * 429 → rate limit, show "try again in a minute".
+ */
+export const useAiSuggestField = () => {
+  return useMutation({
+    mutationFn: async (req: {
+      existingSchema: unknown
+      prompt: string
+    }): Promise<AiFieldSuggestion> => {
+      const { data } = await apiClient.post<AiFieldSuggestion>(
+        '/ai/suggest-field',
+        req,
+        { timeout: 30_000 }, // override default 10s — LLM может быть slow
+      )
+      return data
+    },
+  })
+}
diff --git a/ordinis-admin-ui/src/api/queries.ts b/ordinis-admin-ui/src/api/queries.ts
index 3c25b48..938a25b 100644
--- a/ordinis-admin-ui/src/api/queries.ts
+++ b/ordinis-admin-ui/src/api/queries.ts
@@ -852,6 +852,34 @@ export const schemaTemplateDetailQuery = (id: string) =>
     },
     staleTime: 5 * 60_000,
   })
+
+// ─────────────────────────────────────────────────────────────────────────────
+// AI feature detection — probe endpoint
+// ─────────────────────────────────────────────────────────────────────────────
+
+/**
+ * Probe AI Schema Assist availability. Backend регистрирует /ai/suggest-field
+ * conditionally на ordinis.ai.enabled — если выключено, OPTIONS возвращает 404.
+ *
+ * <p>Used UI чтобы decide показывать ли «AI suggest» button. Cache 5 min —
+ * feature flag меняется только при helm upgrade.
+ */
+export const aiFeatureAvailableQuery = queryOptions({
+  queryKey: ['ai-feature-available'] as const,
+  queryFn: async (): Promise<boolean> => {
+    try {
+      const { data } = await apiClient.get<{ enabled: boolean }>('/ai/info')
+      return Boolean(data?.enabled)
+    } catch {
+      // 404 (AI disabled) или network error → hide button (graceful default).
+      return false
+    }
+  },
+  staleTime: 5 * 60_000,
+  retry: false,
+})
+
+export const useAiFeatureAvailable = () => useQuery(aiFeatureAvailableQuery)
 export const useRecordRaw = (
   dictionaryName: string,
   businessKey: string | undefined,
diff --git a/ordinis-admin-ui/src/components/schema/AiFieldSuggestPanel.tsx b/ordinis-admin-ui/src/components/schema/AiFieldSuggestPanel.tsx
new file mode 100644
index 0000000..02ba594
--- /dev/null
+++ b/ordinis-admin-ui/src/components/schema/AiFieldSuggestPanel.tsx
@@ -0,0 +1,199 @@
+import { useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import axios from 'axios'
+import { SparkleIcon, XIcon } from '@phosphor-icons/react'
+import { Alert, Button, TextArea } from '@/ui'
+import { useAiSuggestField } from '@/api/mutations'
+import { cn } from '@/lib/utils'
+
+/**
+ * AI Schema Assist — per-field suggest panel.
+ *
+ * <p>Expanded inline (не modal) — admin вводит описание → preview JSON suggestion
+ * → accept/reject. Accept callback получает {fieldName, schema} как plain JSON
+ * fragment, caller интегрирует в свой schema state.
+ *
+ * <p>Graceful degradation:
+ * <ul>
+ *   <li>404 от endpoint (AI disabled на бэке) → caller должен hide button entirely</li>
+ *   <li>503 circuit_open → banner «AI временно недоступен», retry в 5 мин</li>
+ *   <li>422 bad_output → error message, suggest другой prompt</li>
+ *   <li>429 rate_limit → «слишком много запросов, подожди минуту»</li>
+ * </ul>
+ */
+type Props = {
+  /** Current schema serialized as JSON object — будет передан как context */
+  existingSchema: Record<string, unknown>
+  /** Called когда юзер accepted suggestion */
+  onAccept: (suggestion: { fieldName: string; schema: Record<string, unknown> }) => void
+  /** Optional close handler — hide panel */
+  onClose?: () => void
+}
+
+export function AiFieldSuggestPanel({ existingSchema, onAccept, onClose }: Props) {
+  const { t } = useTranslation()
+  const [prompt, setPrompt] = useState('')
+  const [suggestion, setSuggestion] = useState<{
+    fieldName: string
+    schema: Record<string, unknown>
+  } | null>(null)
+  const mutation = useAiSuggestField()
+
+  const handleSuggest = () => {
+    if (!prompt.trim()) return
+    setSuggestion(null)
+    mutation.mutate(
+      { existingSchema, prompt },
+      {
+        onSuccess: (data) => setSuggestion(data),
+      },
+    )
+  }
+
+  const handleAccept = () => {
+    if (!suggestion) return
+    onAccept(suggestion)
+    setPrompt('')
+    setSuggestion(null)
+  }
+
+  const handleRetry = () => {
+    setSuggestion(null)
+    handleSuggest()
+  }
+
+  const errorMessage = mutation.error ? formatError(mutation.error, t) : null
+
+  return (
+    <div className="flex flex-col gap-3 p-4 rounded-md border border-line bg-surface-2/50">
+      <div className="flex items-center gap-2">
+        <SparkleIcon size={16} weight="fill" className="text-accent shrink-0" />
+        <span className="text-body font-semibold text-ink flex-1">
+          {t('aiSuggest.title', { defaultValue: 'AI: добавить поле' })}
+        </span>
+        {onClose && (
+          <button
+            type="button"
+            onClick={onClose}
+            aria-label={t('common.close', { defaultValue: 'Закрыть' })}
+            className="text-mute hover:text-ink p-1 rounded-sm hover:bg-surface"
+          >
+            <XIcon size={14} />
+          </button>
+        )}
+      </div>
+
+      <div className="flex flex-col gap-1">
+        <TextArea
+          value={prompt}
+          onChange={(e) => setPrompt(e.target.value)}
+          placeholder={t('aiSuggest.placeholder', {
+            defaultValue: 'Опиши поле — например "орбита: апогей, перигей, наклонение"',
+          })}
+          rows={2}
+          disabled={mutation.isPending}
+          maxLength={500}
+        />
+        <div className="text-cell text-mute">
+          {t('aiSuggest.hint', {
+            defaultValue: 'AI предложит структуру (type/format/x-references). GOST коды и validations добавь сам.',
+          })}
+        </div>
+      </div>
+
+      {!suggestion && (
+        <div className="flex justify-end">
+          <Button
+            type="button"
+            variant="primary"
+            size="sm"
+            onClick={handleSuggest}
+            disabled={mutation.isPending || !prompt.trim()}
+          >
+            {mutation.isPending
+              ? t('aiSuggest.thinking', { defaultValue: 'Думаю…' })
+              : t('aiSuggest.suggest', { defaultValue: 'Предложить' })}
+          </Button>
+        </div>
+      )}
+
+      {errorMessage && (
+        <Alert variant="error">{errorMessage}</Alert>
+      )}
+
+      {suggestion && (
+        <div className="flex flex-col gap-2">
+          <div className="text-cap text-mute uppercase tracking-wider">
+            {t('aiSuggest.preview', { defaultValue: 'Предложение' })}
+          </div>
+          <div className="rounded-sm border border-line bg-surface p-3">
+            <div className="text-body font-semibold text-ink mb-1">
+              <span className="text-mono text-accent">{suggestion.fieldName}</span>
+            </div>
+            <pre className={cn(
+              'text-mono text-cell text-ink-2 max-h-64 overflow-auto whitespace-pre-wrap',
+              'bg-surface-2 rounded-sm p-2',
+            )}>
+              {JSON.stringify(suggestion.schema, null, 2)}
+            </pre>
+          </div>
+          <div className="flex justify-end gap-2">
+            <Button
+              type="button"
+              variant="secondary"
+              size="sm"
+              onClick={handleRetry}
+              disabled={mutation.isPending}
+            >
+              {t('aiSuggest.retry', { defaultValue: 'Перегенерировать' })}
+            </Button>
+            <Button
+              type="button"
+              variant="primary"
+              size="sm"
+              onClick={handleAccept}
+              disabled={mutation.isPending}
+            >
+              {t('aiSuggest.accept', { defaultValue: 'Добавить в схему' })}
+            </Button>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}
+
+function formatError(
+  err: unknown,
+  t: (k: string, opts?: Record<string, unknown>) => string,
+): string {
+  if (axios.isAxiosError(err)) {
+    const status = err.response?.status
+    if (status === 503) {
+      return t('aiSuggest.error.circuit', {
+        defaultValue: 'AI временно недоступен. Попробуй через несколько минут.',
+      })
+    }
+    if (status === 429) {
+      return t('aiSuggest.error.rate', {
+        defaultValue: 'Слишком много запросов. Подожди минуту.',
+      })
+    }
+    if (status === 422) {
+      return t('aiSuggest.error.bad_output', {
+        defaultValue: 'AI вернул невалидный ответ. Попробуй переформулировать prompt.',
+      })
+    }
+    if (status === 502) {
+      return t('aiSuggest.error.upstream', {
+        defaultValue: 'LLM endpoint недоступен. Жди restore или попробуй позже.',
+      })
+    }
+    if (status === 404) {
+      return t('aiSuggest.error.disabled', {
+        defaultValue: 'AI отключён в этой инсталляции.',
+      })
+    }
+  }
+  return t('aiSuggest.error.generic', { defaultValue: 'Не удалось получить предложение.' })
+}
diff --git a/ordinis-admin-ui/src/components/schema/DictionaryEditorDialog.tsx b/ordinis-admin-ui/src/components/schema/DictionaryEditorDialog.tsx
index 4f3c514..2ca8916 100644
--- a/ordinis-admin-ui/src/components/schema/DictionaryEditorDialog.tsx
+++ b/ordinis-admin-ui/src/components/schema/DictionaryEditorDialog.tsx
@@ -16,10 +16,16 @@ import {
   type TabItem,
 } from '@/ui'
 import { useCreateDictionary, useUpdateDictionary } from '@/api/mutations'
-import { dictionaryDetailQuery, useDictionaries } from '@/api/queries'
+import {
+  dictionaryDetailQuery,
+  useAiFeatureAvailable,
+  useDictionaries,
+} from '@/api/queries'
 import type { CreateDictionaryRequest, DataScope, DictionaryDetail } from '@/api/client'
 import { SchemaBuilder } from './SchemaBuilder'
 import { TemplatePicker } from './TemplatePicker'
+import { AiFieldSuggestPanel } from './AiFieldSuggestPanel'
+import { SparkleIcon } from '@phosphor-icons/react'
 import { EventsPreviewTab } from './EventsPreviewTab'
 import { CreateSchemaDraftModal } from '@/components/workflow/CreateSchemaDraftModal'
 import {
@@ -127,6 +133,9 @@ export const DictionaryEditorDialog = ({ open, mode, onClose, onSuccess }: Props
    *  into the schema-draft modal with the maker's in-progress schemaJson
    *  pre-loaded — no retyping. */
   const [draftHandoffOpen, setDraftHandoffOpen] = useState(false)
+  /** AI Schema Assist (Phase 1 step 6): per-field LLM suggest panel toggle. */
+  const [aiPanelOpen, setAiPanelOpen] = useState(false)
+  const aiAvailable = useAiFeatureAvailable()
 
   // Template (только в create-mode): admin выбирает существующий dict,
   // его schema + locale + scope копируются. Имя остаётся пустым (admin
@@ -438,6 +447,51 @@ export const DictionaryEditorDialog = ({ open, mode, onClose, onSuccess }: Props
               />
             </div>
           )}
+          {/* AI Schema Assist Phase 1 step 6: per-field LLM suggest panel.
+            * Toggle hidden когда ordinis.ai.enabled=false на бэкенде (probe
+            * via /api/v1/ai/info → 404 = hide). */}
+          {aiAvailable.data && (
+            <div className="mb-4">
+              {!aiPanelOpen ? (
+                <button
+                  type="button"
+                  onClick={() => setAiPanelOpen(true)}
+                  className="inline-flex items-center gap-1.5 text-cell text-accent hover:underline"
+                >
+                  <SparkleIcon size={14} weight="fill" />
+                  {t('aiSuggest.openButton', { defaultValue: 'AI: добавить поле' })}
+                </button>
+              ) : (
+                <AiFieldSuggestPanel
+                  existingSchema={schemaJson as Record<string, unknown>}
+                  onClose={() => setAiPanelOpen(false)}
+                  onAccept={(suggestion) => {
+                    // Wrap suggestion в mini-schema → parse через existing
+                    // parseSchemaJson → получаем PropertyDef. Reuse уже
+                    // tested kind-inference logic.
+                    const wrapper = {
+                      type: 'object',
+                      properties: { [suggestion.fieldName]: suggestion.schema },
+                    }
+                    const parsed = parseSchemaJson(wrapper as never)
+                    if (parsed.properties.length > 0) {
+                      // Avoid duplicate field name — overwrite если уже есть.
+                      const existingIdx = properties.findIndex(
+                        (p) => p.name === suggestion.fieldName,
+                      )
+                      if (existingIdx >= 0) {
+                        const next = [...properties]
+                        next[existingIdx] = parsed.properties[0]
+                        setProperties(next)
+                      } else {
+                        setProperties([...properties, parsed.properties[0]])
+                      }
+                    }
+                  }}
+                />
+              )}
+            </div>
+          )}
           <SchemaBuilder properties={properties} onChange={setProperties} />
         </div>
 
diff --git a/ordinis-admin-ui/src/i18n.ts b/ordinis-admin-ui/src/i18n.ts
index 4649234..b9f09d9 100644
--- a/ordinis-admin-ui/src/i18n.ts
+++ b/ordinis-admin-ui/src/i18n.ts
@@ -370,6 +370,24 @@ i18n
           'dict.scheduled.cta': 'Перейти к этой дате',
           'dict.scheduled.row.badge': 'Запланировано',
           'dict.scheduled.row.tooltip': 'У записи есть запланированная будущая версия',
+          'aiSuggest.openButton': 'AI: добавить поле',
+          'aiSuggest.title': 'AI: добавить поле',
+          'aiSuggest.placeholder': 'Опиши поле — например «орбита: апогей, перигей, наклонение»',
+          'aiSuggest.hint': 'AI предложит структуру (type/format/x-references). GOST коды и validations добавь сам.',
+          'aiSuggest.suggest': 'Предложить',
+          'aiSuggest.thinking': 'Думаю…',
+          'aiSuggest.preview': 'Предложение',
+          'aiSuggest.retry': 'Перегенерировать',
+          'aiSuggest.accept': 'Добавить в схему',
+          'aiSuggest.error.circuit': 'AI временно недоступен. Попробуй через несколько минут.',
+          'aiSuggest.error.rate': 'Слишком много запросов. Подожди минуту.',
+          'aiSuggest.error.bad_output': 'AI вернул невалидный ответ. Попробуй переформулировать.',
+          'aiSuggest.error.upstream': 'LLM endpoint недоступен. Жди restore или попробуй позже.',
+          'aiSuggest.error.disabled': 'AI отключён в этой инсталляции.',
+          'aiSuggest.error.generic': 'Не удалось получить предложение.',
+          'schemaTemplates.label': 'Начать с шаблона',
+          'schemaTemplates.hint': 'Шаблон загрузит начальные поля. Дополни их вручную.',
+          'common.close': 'Закрыть',
           'dict.col.businessKey': 'Бизнес-ключ',
           'dict.col.scope': 'Scope',
           'dict.col.validFrom': 'Действует с',
@@ -1189,6 +1207,24 @@ i18n
           'dict.scheduled.cta': 'Jump to that date',
           'dict.scheduled.row.badge': 'Scheduled',
           'dict.scheduled.row.tooltip': 'This record has an upcoming scheduled version',
+          'aiSuggest.openButton': 'AI: add field',
+          'aiSuggest.title': 'AI: add field',
+          'aiSuggest.placeholder': 'Describe the field — e.g. "orbit: apogee, perigee, inclination"',
+          'aiSuggest.hint': 'AI suggests structure (type/format/x-references). Add GOST codes and validations manually.',
+          'aiSuggest.suggest': 'Suggest',
+          'aiSuggest.thinking': 'Thinking…',
+          'aiSuggest.preview': 'Suggestion',
+          'aiSuggest.retry': 'Regenerate',
+          'aiSuggest.accept': 'Add to schema',
+          'aiSuggest.error.circuit': 'AI temporarily unavailable. Try again in a few minutes.',
+          'aiSuggest.error.rate': 'Too many requests. Wait a minute.',
+          'aiSuggest.error.bad_output': 'AI returned invalid response. Try rephrasing.',
+          'aiSuggest.error.upstream': 'LLM endpoint unreachable. Wait or try later.',
+          'aiSuggest.error.disabled': 'AI is disabled in this installation.',
+          'aiSuggest.error.generic': 'Failed to get suggestion.',
+          'schemaTemplates.label': 'Start from template',
+          'schemaTemplates.hint': 'Template loads initial fields. Extend manually.',
+          'common.close': 'Close',
           'dict.col.businessKey': 'Business key',
           'dict.col.scope': 'Scope',
           'dict.col.validFrom': 'Valid from',
diff --git a/ordinis-app/src/main/resources/application.yml b/ordinis-app/src/main/resources/application.yml
index 456bf65..330b395 100644
--- a/ordinis-app/src/main/resources/application.yml
+++ b/ordinis-app/src/main/resources/application.yml
@@ -230,6 +230,18 @@ ordinis:
     require-authentication: ${ORDINIS_AUTH_REQUIRED:false}
     allow-query-scope: ${ORDINIS_AUTH_ALLOW_QUERY_SCOPE:true}
 
+  # AI Schema Assist (Phase 1 step 3-6). Off by default — controllers/services
+  # bean-conditionally registered, frontend hides AI button when 404.
+  # Enable per-env через helm values (см. charts/ordinis/values-staging.yaml).
+  # endpoint: OpenAI-compatible /v1/chat/completions root (без /v1 suffix —
+  # adapter добавит сам). bearer-token optional (Ollama не требует, OpenAI да).
+  ai:
+    enabled: ${ORDINIS_AI_ENABLED:false}
+    endpoint: ${ORDINIS_AI_ENDPOINT:}
+    model: ${ORDINIS_AI_MODEL:qwen2.5:7b}
+    bearer-token: ${ORDINIS_AI_BEARER_TOKEN:}
+    timeout-seconds: ${ORDINIS_AI_TIMEOUT_SECONDS:15}
+
   # Keycloak Admin REST integration for UserDisplayService Phase 2 — on-demand
   # sub→user lookup when JWT capture cache + DB cache both miss. See
   # KeycloakAdminUserResolver.java + 0023-user-display-cache.xml migration.
diff --git a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/AiSchemaService.java b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/AiSchemaService.java
new file mode 100644
index 0000000..b6ec826
--- /dev/null
+++ b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/AiSchemaService.java
@@ -0,0 +1,206 @@
+package cloud.nstart.terravault.ordinis.restapi.service.ai;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.stereotype.Service;
+
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * AI Schema Assist — per-field LLM suggest service (Approach C core).
+ *
+ * <p>Принимает existing JSON Schema (context) + free-form prompt (что добавить)
+ * → возвращает {@code {fieldName, schema}} suggestion. Admin reviews, accepts
+ * или edits через standard draft flow.
+ *
+ * <p>System prompt enforces:
+ * <ul>
+ *   <li>Single field output (не whole schema regen)</li>
+ *   <li>Use x-localized / x-references / x-unique / format где уместно</li>
+ *   <li>НЕ изобретать GOST коды или business validations</li>
+ * </ul>
+ *
+ * <p>Circuit breaker (in-memory): 10 fails in 60s → reject все calls в течение
+ * 5 min. Reset на первом успешном после window. Защита от GPU outage.
+ */
+@Service
+@ConditionalOnBean(LlmAdapter.class)
+public class AiSchemaService {
+
+  private static final Logger log = LoggerFactory.getLogger(AiSchemaService.class);
+
+  private static final String SYSTEM_PROMPT = """
+      Ты помогаешь админу справочников ДЗЗ строить JSON Schema fields.
+      Получаешь existing schema (текущие поля) + prompt (описание нового поля).
+      Возвращаешь СТРОГО валидный JSON с двумя ключами: fieldName, schema.
+
+      Правила:
+      - fieldName — snake_case, латиница, без префиксов/dots
+      - schema — JSON Schema fragment для ОДНОГО поля (один root type)
+      - x-localized: true для локализованных текстов (multi-language)
+      - x-references: "dict.field" для FK на другой справочник
+      - x-unique: true для бизнес-ключей
+      - format: date / date-time / email / uri где уместно
+      - description: краткий русский текст что означает поле
+
+      НЕ ИЗОБРЕТАЙ:
+      - GOST коды или иные стандартизованные codes
+      - Business validations (только structural type/format/min/max)
+      - Имена существующих справочников (если не уверен в имени — verbal hint в description без x-references)
+
+      Возвращай ТОЛЬКО JSON, без markdown fences, без комментариев, без преамбулы.
+      """;
+
+  private static final String FEW_SHOT_EXAMPLE = """
+      Пример 1.
+      Existing: {"properties":{"code":{"type":"string"},"name":{"type":"object"}}}
+      Prompt: "Орбита — апогей, перигей, наклонение в градусах"
+      Output: {"fieldName":"orbit","schema":{"type":"object","description":"Параметры орбиты","properties":{"apogee_km":{"type":"number","description":"Апогей, км","minimum":0},"perigee_km":{"type":"number","description":"Перигей, км","minimum":0},"inclination_deg":{"type":"number","minimum":0,"maximum":180}}}}
+
+      Пример 2.
+      Existing: {"properties":{"code":{"type":"string"},"name":{"type":"object"}}}
+      Prompt: "Email контакт"
+      Output: {"fieldName":"contact_email","schema":{"type":"string","format":"email","description":"Контактный email"}}
+
+      Пример 3.
+      Existing: {"properties":{"code":{"type":"string"}}}
+      Prompt: "Ссылка на оператора"
+      Output: {"fieldName":"operator_code","schema":{"type":"string","pattern":"^[A-Z][A-Z0-9_]{1,31}$","x-references":"operator.code","description":"FK на operator.code"}}
+      """;
+
+  private final LlmAdapter llm;
+  private final ObjectMapper mapper;
+
+  // Simple in-memory circuit breaker — счётчик fails за rolling 60s window,
+  // если >= 10 → open для 5 min. State per JVM (writer single instance).
+  private final AtomicInteger recentFails = new AtomicInteger(0);
+  private final AtomicLong windowStartedAt = new AtomicLong(System.currentTimeMillis());
+  private final AtomicLong openUntil = new AtomicLong(0);
+
+  private static final long WINDOW_MS = 60_000;
+  private static final int FAIL_THRESHOLD = 10;
+  private static final long OPEN_DURATION_MS = 5 * 60_000;
+
+  public AiSchemaService(LlmAdapter llm, ObjectMapper mapper) {
+    this.llm = llm;
+    this.mapper = mapper;
+  }
+
+  /**
+   * Suggest single field. Returns parsed {@code {fieldName, schema}} JsonNode.
+   *
+   * @throws AiSchemaException на circuit breaker open, LLM error, или invalid output
+   */
+  public JsonNode suggestField(JsonNode existingSchema, String prompt) throws AiSchemaException {
+    if (isOpen()) {
+      throw new AiSchemaException("AI временно недоступен (circuit breaker open)", "circuit_open");
+    }
+    if (prompt == null || prompt.isBlank()) {
+      throw new AiSchemaException("prompt пустой", "bad_prompt");
+    }
+    if (prompt.length() > 500) {
+      throw new AiSchemaException("prompt слишком длинный (max 500 chars)", "bad_prompt");
+    }
+
+    String existingJson = existingSchema == null ? "{\"properties\":{}}" : existingSchema.toString();
+    if (existingJson.length() > 4000) {
+      // Truncate context if monstrous — каркасные templates обычно ~500 chars.
+      log.warn("existingSchema truncated from {} to 4000 chars", existingJson.length());
+      existingJson = existingJson.substring(0, 4000);
+    }
+
+    String userPrompt = FEW_SHOT_EXAMPLE
+        + "\n\nТеперь твой ход.\nExisting: " + existingJson
+        + "\nPrompt: \"" + prompt.replace("\"", "\\\"") + "\"\nOutput:";
+
+    String raw;
+    try {
+      raw = llm.chat(SYSTEM_PROMPT, userPrompt);
+    } catch (LlmAdapter.LlmException e) {
+      recordFail();
+      throw new AiSchemaException(e.getMessage(), "llm_error");
+    }
+
+    JsonNode parsed = parseFieldSuggestion(raw);
+    if (parsed == null) {
+      recordFail();
+      throw new AiSchemaException(
+          "LLM вернул невалидный JSON: " + truncate(raw, 200), "bad_output");
+    }
+    if (!parsed.has("fieldName") || !parsed.has("schema")) {
+      recordFail();
+      throw new AiSchemaException(
+          "LLM output missing fieldName/schema keys", "bad_output");
+    }
+    String fieldName = parsed.get("fieldName").asText("");
+    if (!fieldName.matches("^[a-z][a-z0-9_]{0,63}$")) {
+      recordFail();
+      throw new AiSchemaException(
+          "fieldName '" + fieldName + "' не валидный (snake_case, латиница, ≤64)", "bad_field_name");
+    }
+
+    // Success — reset breaker counter.
+    recentFails.set(0);
+    return parsed;
+  }
+
+  /**
+   * Try parse LLM output as JSON. Robust к markdown fences (```json ... ```)
+   * которые small models иногда добавляют несмотря на system prompt.
+   */
+  JsonNode parseFieldSuggestion(String raw) {
+    if (raw == null) return null;
+    String cleaned = raw.trim();
+    // Strip markdown code fence
+    if (cleaned.startsWith("```")) {
+      Matcher m = Pattern.compile("```(?:json)?\\s*([\\s\\S]*?)```", Pattern.MULTILINE)
+          .matcher(cleaned);
+      if (m.find()) cleaned = m.group(1).trim();
+    }
+    try {
+      return mapper.readTree(cleaned);
+    } catch (Exception e) {
+      return null;
+    }
+  }
+
+  private boolean isOpen() {
+    return openUntil.get() > System.currentTimeMillis();
+  }
+
+  private void recordFail() {
+    long now = System.currentTimeMillis();
+    if (now - windowStartedAt.get() > WINDOW_MS) {
+      // Reset rolling window
+      windowStartedAt.set(now);
+      recentFails.set(1);
+      return;
+    }
+    int fails = recentFails.incrementAndGet();
+    if (fails >= FAIL_THRESHOLD) {
+      openUntil.set(now + OPEN_DURATION_MS);
+      log.warn("AI circuit breaker OPEN after {} fails in {}ms — closed until {}ms",
+          fails, WINDOW_MS, openUntil.get());
+    }
+  }
+
+  private static String truncate(String s, int max) {
+    return s.length() <= max ? s : s.substring(0, max) + "…";
+  }
+
+  /** Domain exception with stable error code для frontend (i18n + error UX). */
+  public static class AiSchemaException extends Exception {
+    private final String code;
+    public AiSchemaException(String message, String code) {
+      super(message);
+      this.code = code;
+    }
+    public String getCode() { return code; }
+  }
+}
diff --git a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/LlmAdapter.java b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/LlmAdapter.java
new file mode 100644
index 0000000..123a2ff
--- /dev/null
+++ b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/ai/LlmAdapter.java
@@ -0,0 +1,160 @@
+package cloud.nstart.terravault.ordinis.restapi.service.ai;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.stereotype.Component;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.List;
+
+/**
+ * AI Schema Assist — thin HTTP client для OpenAI-compatible chat completion
+ * endpoints (Ollama via `/v1/chat/completions`, vLLM, OpenAI itself).
+ *
+ * <p>Минимальный subset: model + messages → assistant content. Без streaming,
+ * без tool calls — для AI Schema Assist достаточно single-shot JSON gen.
+ *
+ * <p>Bean создаётся ТОЛЬКО когда {@code ordinis.ai.enabled=true} —
+ * controllers/services которые требуют LlmAdapter должны быть guarded тем же
+ * flag'ом. Это позволяет run prod без AI deps когда GPU не готов / license off.
+ *
+ * <p>Bearer token optional (Ollama works без auth; OpenAI требует).
+ */
+@Component
+@ConditionalOnProperty(name = "ordinis.ai.enabled", havingValue = "true")
+public class LlmAdapter {
+
+  private static final Logger log = LoggerFactory.getLogger(LlmAdapter.class);
+
+  private final HttpClient http;
+  private final ObjectMapper mapper;
+  private final String endpoint;
+  private final String model;
+  private final String bearerToken;
+  private final Duration timeout;
+
+  public LlmAdapter(
+      ObjectMapper mapper,
+      @Value("${ordinis.ai.endpoint:}") String endpoint,
+      @Value("${ordinis.ai.model:qwen2.5:7b}") String model,
+      @Value("${ordinis.ai.bearer-token:}") String bearerToken,
+      @Value("${ordinis.ai.timeout-seconds:15}") int timeoutSeconds) {
+    this.mapper = mapper;
+    this.endpoint = trimTrailingSlash(endpoint);
+    this.model = model;
+    this.bearerToken = bearerToken;
+    this.timeout = Duration.ofSeconds(timeoutSeconds);
+    this.http = HttpClient.newBuilder()
+        .connectTimeout(Duration.ofSeconds(5))
+        .build();
+  }
+
+  private static String trimTrailingSlash(String s) {
+    if (s == null) return "";
+    return s.endsWith("/") ? s.substring(0, s.length() - 1) : s;
+  }
+
+  /**
+   * Chat completion с single turn (system + user). Returns assistant message
+   * content (typically JSON-formatted для AI Schema Assist use case).
+   *
+   * @throws LlmException на timeout / network failure / non-2xx response
+   */
+  public String chat(String systemPrompt, String userPrompt) throws LlmException {
+    if (endpoint == null || endpoint.isBlank()) {
+      throw new LlmException("ordinis.ai.endpoint не настроен");
+    }
+    String url = endpoint + "/v1/chat/completions";
+
+    ObjectNode body = mapper.createObjectNode();
+    body.put("model", model);
+    body.put("stream", false);
+    // Lower temperature для structured output (JSON) — детерминизм важнее
+    // diversity. 0.2 standard для code/schema generation.
+    body.put("temperature", 0.2);
+    ArrayNode messages = body.putArray("messages");
+    messages.addObject().put("role", "system").put("content", systemPrompt);
+    messages.addObject().put("role", "user").put("content", userPrompt);
+
+    String payload;
+    try {
+      payload = mapper.writeValueAsString(body);
+    } catch (Exception e) {
+      throw new LlmException("serialization failed: " + e.getMessage());
+    }
+
+    HttpRequest.Builder reqBuilder = HttpRequest.newBuilder(URI.create(url))
+        .header("Content-Type", "application/json")
+        .timeout(timeout)
+        .POST(HttpRequest.BodyPublishers.ofString(payload));
+    if (bearerToken != null && !bearerToken.isBlank()) {
+      reqBuilder.header("Authorization", "Bearer " + bearerToken);
+    }
+
+    HttpResponse<String> response;
+    long start = System.currentTimeMillis();
+    try {
+      response = http.send(reqBuilder.build(), HttpResponse.BodyHandlers.ofString());
+    } catch (java.net.http.HttpTimeoutException e) {
+      throw new LlmException("LLM timeout > " + timeout.toSeconds() + "s");
+    } catch (Exception e) {
+      throw new LlmException("LLM connection failed: " + e.getClass().getSimpleName() + " — " + e.getMessage());
+    }
+    long durationMs = System.currentTimeMillis() - start;
+
+    int status = response.statusCode();
+    if (status < 200 || status >= 300) {
+      log.warn("LLM HTTP {} {}ms: {}", status, durationMs, truncate(response.body(), 300));
+      throw new LlmException("LLM HTTP " + status);
+    }
+
+    String content;
+    try {
+      JsonNode root = mapper.readTree(response.body());
+      JsonNode choices = root.get("choices");
+      if (choices == null || !choices.isArray() || choices.isEmpty()) {
+        throw new LlmException("LLM response missing 'choices' array");
+      }
+      JsonNode msg = choices.get(0).get("message");
+      if (msg == null || msg.get("content") == null) {
+        throw new LlmException("LLM response missing message.content");
+      }
+      content = msg.get("content").asText();
+    } catch (LlmException le) {
+      throw le;
+    } catch (Exception e) {
+      throw new LlmException("LLM response parse failed: " + e.getMessage());
+    }
+
+    log.info("LLM ok model={} duration_ms={} response_chars={}", model, durationMs, content.length());
+    return content;
+  }
+
+  public List<String> describeConfig() {
+    return List.of(
+        "endpoint=" + endpoint,
+        "model=" + model,
+        "timeout=" + timeout.toSeconds() + "s",
+        "bearer=" + (bearerToken == null || bearerToken.isBlank() ? "no" : "yes"));
+  }
+
+  private static String truncate(String s, int max) {
+    if (s == null) return "";
+    return s.length() <= max ? s : s.substring(0, max) + "…[" + s.length() + "]";
+  }
+
+  /** Domain exception для всех LLM HTTP / parse failures. Caught controller-side. */
+  public static class LlmException extends Exception {
+    public LlmException(String message) { super(message); }
+  }
+}
diff --git a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AiSchemaController.java b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AiSchemaController.java
new file mode 100644
index 0000000..9253c68
--- /dev/null
+++ b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AiSchemaController.java
@@ -0,0 +1,130 @@
+package cloud.nstart.terravault.ordinis.restapi.web;
+
+import cloud.nstart.terravault.ordinis.restapi.service.ai.AiSchemaService;
+import com.fasterxml.jackson.databind.JsonNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * AI Schema Assist — per-field suggest endpoint.
+ *
+ * <p>{@code POST /api/v1/ai/suggest-field}
+ * <pre>
+ * Request:  { existingSchema: {...JSON Schema}, prompt: "Орбита — апогей..." }
+ * Success:  { fieldName: "orbit", schema: {type:"object", properties:{...}} }
+ * Error:    422 {code, message} — bad output / parse failure
+ *           503 {code:"circuit_open"} — breaker active
+ *           429 {code:"rate_limit"} — too many calls
+ * </pre>
+ *
+ * <p>Rate limit: 30 calls/minute per IP. Simple in-memory counter — для
+ * single-writer setup достаточно (production usage будет ≤ десятков
+ * запросов в день).
+ *
+ * <p>Endpoint conditionally registered ({@code ConditionalOnBean(AiSchemaService.class)})
+ * — если AI disabled (ordinis.ai.enabled=false) controller не создаётся,
+ * frontend получит 404 и спрячет AI button.
+ */
+@RestController
+@RequestMapping("/api/v1/ai")
+@ConditionalOnBean(AiSchemaService.class)
+public class AiSchemaController {
+
+  private static final Logger log = LoggerFactory.getLogger(AiSchemaController.class);
+
+  private static final int RATE_LIMIT_PER_MIN = 30;
+  private static final long WINDOW_MS = 60_000;
+
+  private final AiSchemaService service;
+  private final ConcurrentHashMap<String, RateBucket> buckets = new ConcurrentHashMap<>();
+
+  public AiSchemaController(AiSchemaService service) {
+    this.service = service;
+  }
+
+  /**
+   * Lightweight probe endpoint — frontend hits this чтобы decide показывать
+   * ли AI buttons. 200 = enabled (controller bean exists), 404 = disabled
+   * (bean missing through @ConditionalOnBean).
+   */
+  @GetMapping("/info")
+  public AiInfoResponse info() {
+    return new AiInfoResponse(true);
+  }
+
+  public record AiInfoResponse(boolean enabled) {}
+
+  @PostMapping("/suggest-field")
+  public JsonNode suggestField(
+      @RequestBody SuggestFieldRequest req,
+      jakarta.servlet.http.HttpServletRequest http) {
+
+    String clientKey = http.getRemoteAddr() == null ? "anonymous" : http.getRemoteAddr();
+    if (!allowRequest(clientKey)) {
+      log.warn("AI rate limit hit для {}", clientKey);
+      throw new ResponseStatusException(
+          HttpStatus.TOO_MANY_REQUESTS,
+          "AI suggest rate limit exceeded (30/min). Try again in a minute.");
+    }
+
+    if (req == null || req.prompt == null || req.prompt.isBlank()) {
+      throw new ResponseStatusException(
+          HttpStatus.BAD_REQUEST, "prompt is required");
+    }
+
+    try {
+      return service.suggestField(req.existingSchema, req.prompt);
+    } catch (AiSchemaService.AiSchemaException e) {
+      log.warn("AI suggest failed code={} msg={}", e.getCode(), e.getMessage());
+      HttpStatus status = switch (e.getCode()) {
+        case "circuit_open" -> HttpStatus.SERVICE_UNAVAILABLE;
+        case "bad_prompt", "bad_field_name", "bad_output" -> HttpStatus.UNPROCESSABLE_ENTITY;
+        case "llm_error" -> HttpStatus.BAD_GATEWAY;
+        default -> HttpStatus.INTERNAL_SERVER_ERROR;
+      };
+      throw new ResponseStatusException(status, e.getMessage());
+    }
+  }
+
+  /** Simple per-IP rate limit (sliding window counter). */
+  private boolean allowRequest(String key) {
+    long now = System.currentTimeMillis();
+    RateBucket bucket = buckets.computeIfAbsent(key, k -> new RateBucket(now));
+    synchronized (bucket) {
+      if (now - bucket.windowStartedAt.get() > WINDOW_MS) {
+        bucket.windowStartedAt.set(now);
+        bucket.count.set(1);
+        return true;
+      }
+      return bucket.count.incrementAndGet() <= RATE_LIMIT_PER_MIN;
+    }
+  }
+
+  /** Body class — Jackson auto-binds. */
+  public static class SuggestFieldRequest {
+    public JsonNode existingSchema;
+    public String prompt;
+  }
+
+  private static class RateBucket {
+    final AtomicLong windowStartedAt;
+    final AtomicInteger count;
+
+    RateBucket(long now) {
+      this.windowStartedAt = new AtomicLong(now);
+      this.count = new AtomicInteger(0);
+    }
+  }
+}