diff --git a/src/gpu_rent/civitai.py b/src/gpu_rent/civitai.py
index a817bc9..c7e5649 100644
--- a/src/gpu_rent/civitai.py
+++ b/src/gpu_rent/civitai.py
@@ -80,6 +80,39 @@ def pick_primary_file(version: dict) -> dict | None:
     return None
 
 
+def pick_preview_image(version: dict) -> tuple[str, str] | None:
+    """First usable Civitai preview → (url, sidecar_suffix) for SwarmUI.
+
+    SwarmUI looks for ``stem.preview.jpg`` / ``.preview.png`` / ``.jpg`` etc.
+    next to the weight (T2IModelHandler AutoImageFormatSuffixes).
+    """
+    images = version.get("images") or []
+    if not isinstance(images, list):
+        return None
+    for item in images:
+        if not isinstance(item, dict):
+            continue
+        kind = str(item.get("type") or "image").lower()
+        if kind and kind not in {"image", "img", ""}:
+            continue
+        url = str(item.get("url") or "").strip()
+        if not url.startswith("http"):
+            continue
+        path = url.split("?", 1)[0].lower()
+        if path.endswith(".png"):
+            suffix = ".preview.png"
+        elif path.endswith(".jpeg") or path.endswith(".jpg"):
+            suffix = ".preview.jpg"
+        elif path.endswith(".webp"):
+            # SwarmUI auto-format list has no .preview.webp — use .jpg name;
+            # most Civitai CDN URLs are jpeg without extension.
+            suffix = ".preview.jpg"
+        else:
+            suffix = ".preview.jpg"
+        return url, suffix
+    return None
+
+
 def fetch_model_version(token: str, host: str, version_id: int, timeout: float = 30.0) -> tuple[str, dict]:
     """GET /api/v1/model-versions/{id}; one retry on the other Civitai host."""
     first = _normalize_host(host)
diff --git a/src/gpu_rent/doctor.py b/src/gpu_rent/doctor.py
index 9cdba17..a5f0c7b 100644
--- a/src/gpu_rent/doctor.py
+++ b/src/gpu_rent/doctor.py
@@ -349,17 +349,31 @@ def _local_manifests(cfg: Config, checks: list[Check]) -> None:
 
     try:
         repos = parse_extensions(cfg.extensions_manifest)
-        if cfg.extensions_manifest.is_file():
-            checks.append(
-                Check(
-                    "extensions.yaml",
-                    True,
-                    True,
-                    f"{len(repos)} git-реп",
-                )
-            )
-        else:
+        if not cfg.extensions_manifest.is_file():
             checks.append(Check("extensions.yaml", True, False, "файла нет — стоковый SwarmUI"))
+        elif repos:
+            checks.append(Check("extensions.yaml", True, True, f"{len(repos)} git-реп"))
+        else:
+            example = cfg.extensions_manifest.with_name("extensions.example.yaml")
+            n_ex = 0
+            if example.is_file():
+                try:
+                    n_ex = len(parse_extensions(example))
+                except ConfigError:
+                    n_ex = 0
+            if n_ex:
+                checks.append(
+                    Check(
+                        "extensions.yaml",
+                        True,
+                        False,
+                        f"пустой; в example {n_ex} реп — скопируй и gpu-rent seed-extensions",
+                    )
+                )
+            else:
+                checks.append(
+                    Check("extensions.yaml", True, False, "0 реп — стоковый SwarmUI")
+                )
     except ConfigError as exc:
         checks.append(Check("extensions.yaml", False, True, str(exc)))
 
diff --git a/src/gpu_rent/provision.py b/src/gpu_rent/provision.py
index ae7e879..6b980e1 100644
--- a/src/gpu_rent/provision.py
+++ b/src/gpu_rent/provision.py
@@ -11,7 +11,7 @@ from pathlib import Path
 
 import httpx
 
-from gpu_rent.civitai import fetch_model_version, pick_primary_file
+from gpu_rent.civitai import fetch_model_version, pick_preview_image, pick_primary_file
 from gpu_rent.config import Config
 from gpu_rent.errors import CloudError, GpuRentError
 from gpu_rent.manifests import (
@@ -126,6 +126,14 @@ def seed_extensions(cfg: Config, host: str, log: Log, *, update: bool = True) ->
         else:
             log("extensions.yaml пуст — стоковый SwarmUI")
         return False
+    if not repos and update:
+        if not all_repos:
+            log("extensions.yaml пуст — только update уже установленных на data (если есть)")
+        else:
+            log(
+                "extensions: yaml отфильтрован по requires "
+                f"(LLM_RUNTIME={runtime}) — только update установленных"
+            )
     jobs = []
     for repo in repos:
         jobs.append(
@@ -462,18 +470,22 @@ def seed_civitai(cfg: Config, host: str, log: Log) -> None:
             ),
             "tags": version.get("tags") or [],
         }
-        jobs.append(
-            {
-                "dest": dest,
-                "url": _download_url(api_host, vid, info),
-                "sha256": sha,
-                "auth": "civitai",
-                "sidecars": {
-                    f"{stem}.civitai.json": civitai_json,
-                    f"{stem}.swarm.json": json.dumps(swarm, ensure_ascii=False, indent=2),
-                },
-            }
-        )
+        job: dict = {
+            "dest": dest,
+            "url": _download_url(api_host, vid, info),
+            "sha256": sha,
+            "auth": "civitai",
+            "sidecars": {
+                f"{stem}.civitai.json": civitai_json,
+                f"{stem}.swarm.json": json.dumps(swarm, ensure_ascii=False, indent=2),
+            },
+        }
+        preview = pick_preview_image(version)
+        if preview:
+            preview_url, preview_suffix = preview
+            job["preview_url"] = preview_url
+            job["preview_dest"] = f"{DATA}/Models/{folder}/{stem}{preview_suffix}"
+        jobs.append(job)
 
     if not jobs:
         if not cfg.civitai_api_token:
diff --git a/src/gpu_rent/remote/civitai_fetch.py b/src/gpu_rent/remote/civitai_fetch.py
index 72516f8..1afd18b 100644
--- a/src/gpu_rent/remote/civitai_fetch.py
+++ b/src/gpu_rent/remote/civitai_fetch.py
@@ -153,6 +153,30 @@ def download(url: str, dest: Path, token: str, *, label: str, auth_host: str) ->
     partial.replace(dest)
 
 
+def ensure_preview(job: dict, token: str, *, prefix: str, auth_host: str) -> None:
+    """Download SwarmUI sidecar preview if missing (even when weight was skipped)."""
+    preview_url = str(job.get("preview_url") or "").strip()
+    preview_dest = str(job.get("preview_dest") or "").strip()
+    if not preview_url or not preview_dest:
+        return
+    dest = Path(preview_dest)
+    if dest.is_file() and dest.stat().st_size > 0:
+        return
+    try:
+        print(f"{prefix} preview: {dest.name}", flush=True)
+        # Image CDN usually needs no Bearer; still pass token for civitai hosts.
+        download(
+            preview_url,
+            dest,
+            token if auth_host == "civitai" else "",
+            label=f"{prefix} {dest.name}",
+            auth_host=auth_host if auth_host == "civitai" else "civitai",
+        )
+        print(f"{prefix} preview ok {dest.name} ({fmt_bytes(dest.stat().st_size)})")
+    except Exception as exc:
+        print(f"{prefix} WARN preview {dest.name}: {exc}")
+
+
 def main() -> int:
     civitai_token = (
         TOKEN_PATH.read_text(encoding="utf-8").strip() if TOKEN_PATH.is_file() else ""
@@ -187,6 +211,7 @@ def main() -> int:
                 extra = dest.parent / extra_name
                 extra.parent.mkdir(parents=True, exist_ok=True)
                 extra.write_text(extra_text, encoding="utf-8")
+            ensure_preview(job, token, prefix=prefix, auth_host=auth_host)
             continue
         if reason:
             print(f"{prefix} {reason}: {dest.name}")
@@ -212,6 +237,7 @@ def main() -> int:
             for extra_name, extra_text in (job.get("sidecars") or {}).items():
                 extra = dest.parent / extra_name
                 extra.write_text(extra_text, encoding="utf-8")
+            ensure_preview(job, token, prefix=prefix, auth_host=auth_host)
             print(f"{prefix} ok {dest.name} ({fmt_bytes(dest.stat().st_size)})")
         except Exception as exc:
             failed += 1
diff --git a/tests/test_civitai_fetch.py b/tests/test_civitai_fetch.py
index 7e91439..1f377ea 100644
--- a/tests/test_civitai_fetch.py
+++ b/tests/test_civitai_fetch.py
@@ -1,5 +1,6 @@
 from pathlib import Path
 
+from gpu_rent.civitai import pick_preview_image
 from gpu_rent.remote.civitai_fetch import fmt_bytes, progress_line, should_skip
 
 
@@ -54,3 +55,28 @@ def test_progress_line_unknown_total():
     line = progress_line("file", 1024 * 1024, None, 100_000)
     assert "%" not in line
     assert "/s" in line
+
+
+def test_pick_preview_image_first_jpeg():
+    version = {
+        "images": [
+            {"type": "video", "url": "https://example.com/x.mp4"},
+            {"type": "image", "url": "https://image.civitai.com/x/width=450/abc.jpeg"},
+        ]
+    }
+    got = pick_preview_image(version)
+    assert got is not None
+    url, suffix = got
+    assert "abc.jpeg" in url
+    assert suffix == ".preview.jpg"
+
+
+def test_pick_preview_image_png_and_default():
+    assert pick_preview_image({"images": [{"url": "https://cdn.example/a.png"}]})[1] == (
+        ".preview.png"
+    )
+    assert pick_preview_image({"images": [{"url": "https://cdn.example/hash/width=450"}]})[
+        1
+    ] == ".preview.jpg"
+    assert pick_preview_image({"images": []}) is None
+    assert pick_preview_image({}) is None