diff --git a/movie_editor/backend/pipeline_deps.py b/movie_editor/backend/pipeline_deps.py
new file mode 100644
index 00000000..01b32ce7
--- /dev/null
+++ b/movie_editor/backend/pipeline_deps.py
@@ -0,0 +1,294 @@
+"""Detect missing custom-node packs for the built-in FunPack pipeline and install
+them through ComfyUI-Manager's queue (same path as the Manager UI)."""
+from __future__ import annotations
+
+import asyncio
+import time
+import uuid
+from typing import Any, Optional
+
+from . import config
+from .builder import CORE
+
+# Curated mapping: pack id (ComfyUI-Manager / registry) -> node classes used by the
+# fixed core graph. FunPack and comfy-core primitives are excluded.
+PIPELINE_PACKS: list[dict[str, Any]] = [
+    {
+        "id": "ComfyUI-LTXVideo",
+        "title": "ComfyUI-LTXVideo",
+        "classes": frozenset({
+            "LTXVConditioning",
+            "LTXVConcatAVLatent",
+            "LTXVSeparateAVLatent",
+            "LTXVAudioVAEDecode",
+            "LTXFloatToInt",
+        }),
+        "git_urls": ["https://github.com/Lightricks/ComfyUI-LTXVideo"],
+    },
+    {
+        "id": "comfyui-videohelpersuite",
+        "title": "Video Helper Suite",
+        "classes": frozenset({"VHS_VideoCombine"}),
+        "git_urls": ["https://github.com/Kosinkadink/ComfyUI-VideoHelperSuite"],
+    },
+    {
+        "id": "comfyui-kjnodes",
+        "title": "KJNodes",
+        "classes": frozenset({"NormalizeAudioLoudness"}),
+        "git_urls": ["https://github.com/kijai/ComfyUI-KJNodes"],
+    },
+]
+
+_PACK_BY_ID = {p["id"]: p for p in PIPELINE_PACKS}
+_ALL_MAPPED = frozenset().union(*(p["classes"] for p in PIPELINE_PACKS))
+
+_install_jobs: dict[str, dict] = {}
+
+
+def required_core_classes() -> list[str]:
+    return sorted(set(CORE.values()))
+
+
+def missing_core_classes(object_info: dict | None) -> list[str]:
+    oi = object_info or {}
+    return sorted(cls for cls in CORE.values() if cls not in oi)
+
+
+def missing_packs(object_info: dict | None) -> list[dict]:
+    missing = set(missing_core_classes(object_info))
+    out: list[dict] = []
+    for pack in PIPELINE_PACKS:
+        hit = pack["classes"] & missing
+        if not hit:
+            continue
+        out.append({
+            "id": pack["id"],
+            "title": pack["title"],
+            "missing_classes": sorted(hit),
+        })
+    return out
+
+
+def unmapped_missing_classes(object_info: dict | None) -> list[str]:
+    missing = set(missing_core_classes(object_info))
+    return sorted(missing - _ALL_MAPPED)
+
+
+def status_payload(object_info: dict | None, *, manager_available: bool) -> dict:
+    packs = missing_packs(object_info)
+    unmapped = unmapped_missing_classes(object_info)
+    return {
+        "manager_available": manager_available,
+        "missing_classes": missing_core_classes(object_info),
+        "missing_packs": packs,
+        "unmapped_classes": unmapped,
+        "needs_install": bool(packs),
+        "manual_urls": [
+            {"id": p["id"], "title": p["title"], "url": p["git_urls"][0]}
+            for p in PIPELINE_PACKS
+            if p["id"] in {x["id"] for x in packs}
+        ],
+    }
+
+
+async def manager_available() -> bool:
+    status, _ = await _manager_request("GET", "/manager/version")
+    if status == 200:
+        return True
+    status, _ = await _manager_request("GET", "/api/manager/version")
+    return status == 200
+
+
+async def _manager_request(method: str, path: str, *, json_body: dict | None = None, text_body: str | None = None):
+    import aiohttp
+
+    base = config.comfy_base_url().rstrip("/")
+    url = f"{base}{path}"
+    headers: dict[str, str] = {}
+    kwargs: dict[str, Any] = {}
+    if json_body is not None:
+        headers["Content-Type"] = "application/json"
+        kwargs["json"] = json_body
+    elif text_body is not None:
+        headers["Content-Type"] = "text/plain"
+        kwargs["data"] = text_body
+    timeout = aiohttp.ClientTimeout(total=120)
+    async with aiohttp.ClientSession(timeout=timeout) as session:
+        async with session.request(method, url, headers=headers, **kwargs) as resp:
+            text = await resp.text()
+            return resp.status, text
+
+
+async def _fetch_manager_pack_meta(pack_id: str) -> dict | None:
+    for path in ("/customnode/getlist?mode=cache", "/api/customnode/getlist?mode=cache"):
+        status, body = await _manager_request("GET", path)
+        if status != 200:
+            continue
+        try:
+            import json as _json
+            data = _json.loads(body)
+        except Exception:
+            continue
+        node_packs = data.get("node_packs") or {}
+        for _key, meta in node_packs.items():
+            if not isinstance(meta, dict):
+                continue
+            if meta.get("id") == pack_id or meta.get("cnr_id") == pack_id or _key == pack_id:
+                return meta
+    return None
+
+
+def _install_body(pack: dict, meta: dict | None) -> dict:
+    pid = pack["id"]
+    title = pack["title"]
+    if meta:
+        version = str(meta.get("version") or meta.get("ver") or "nightly")
+        selected = str(meta.get("selected_version") or "latest")
+        body: dict[str, Any] = {
+            "id": meta.get("id") or meta.get("cnr_id") or pid,
+            "title": meta.get("title") or title,
+            "name": meta.get("name") or title,
+            "version": version,
+            "selected_version": selected,
+            "channel": str(meta.get("channel") or "default"),
+            "mode": "cache",
+            "ui_id": pid,
+            "skip_post_install": False,
+        }
+        if meta.get("repository"):
+            body["repository"] = meta["repository"]
+        if meta.get("files"):
+            body["files"] = meta["files"]
+        return body
+    return {
+        "id": pid,
+        "title": title,
+        "name": title,
+        "version": "unknown",
+        "selected_version": "unknown",
+        "files": list(pack.get("git_urls") or []),
+        "install_type": "git-clone",
+        "channel": "default",
+        "mode": "cache",
+        "ui_id": pid,
+        "skip_post_install": False,
+    }
+
+
+async def _queue_install(body: dict) -> tuple[bool, str]:
+    for path in ("/manager/queue/install", "/api/manager/queue/install"):
+        status, text = await _manager_request("POST", path, json_body=body)
+        if status in (200, 201):
+            return True, ""
+        if status == 403:
+            return False, "ComfyUI-Manager blocked the install (security policy). Open Manager and lower the security level, or install the packs manually."
+        if status == 404:
+            return False, text.strip() or "Pack not found in ComfyUI-Manager database."
+    return False, "ComfyUI-Manager install endpoint unavailable."
+
+
+async def _start_manager_queue() -> None:
+    for path in ("/manager/queue/start", "/api/manager/queue/start"):
+        status, _ = await _manager_request("GET", path)
+        if status in (200, 201):
+            return
+
+
+async def _manager_queue_status() -> dict:
+    for path in ("/manager/queue/status", "/api/manager/queue/status"):
+        status, body = await _manager_request("GET", path)
+        if status != 200:
+            continue
+        try:
+            import json as _json
+            data = _json.loads(body)
+            if isinstance(data, dict):
+                return data
+        except Exception:
+            pass
+    return {}
+
+
+def create_install_job(pack_ids: list[str]) -> dict:
+    packs = []
+    for pid in pack_ids:
+        spec = _PACK_BY_ID.get(pid)
+        if spec:
+            packs.append({"id": pid, "title": spec["title"]})
+    job_id = uuid.uuid4().hex[:12]
+    job = {
+        "job_id": job_id,
+        "state": "queued",
+        "packs": packs,
+        "total": len(packs),
+        "done": 0,
+        "current_title": packs[0]["title"] if packs else "",
+        "error": "",
+        "started_at": time.time(),
+    }
+    _install_jobs[job_id] = job
+    return job
+
+
+def get_install_job(job_id: str) -> Optional[dict]:
+    job = _install_jobs.get(job_id)
+    if not job:
+        return None
+    return {
+        "job_id": job["job_id"],
+        "state": job["state"],
+        "packs": job["packs"],
+        "total": job["total"],
+        "done": job["done"],
+        "current_title": job.get("current_title") or "",
+        "error": job.get("error") or "",
+    }
+
+
+async def run_install_job(job_id: str, restart_fn) -> None:
+    job = _install_jobs.get(job_id)
+    if not job:
+        return
+    job["state"] = "installing"
+    try:
+        for i, pack in enumerate(job["packs"]):
+            pid = pack["id"]
+            spec = _PACK_BY_ID.get(pid)
+            if not spec:
+                continue
+            job["current_title"] = pack["title"]
+            job["done"] = i
+            meta = await _fetch_manager_pack_meta(pid)
+            body = _install_body(spec, meta)
+            ok, err = await _queue_install(body)
+            if not ok:
+                job["state"] = "error"
+                job["error"] = err or f"Failed to queue {pack['title']}."
+                return
+        await _start_manager_queue()
+        deadline = time.time() + 1800
+        while time.time() < deadline:
+            st = await _manager_queue_status()
+            done = int(st.get("done_count") or 0)
+            total = int(st.get("total_count") or 0) or job["total"]
+            processing = bool(st.get("is_processing"))
+            job["total"] = max(job["total"], total)
+            job["done"] = min(done, job["total"])
+            if job["packs"]:
+                idx = min(max(done, 0), len(job["packs"]) - 1)
+                job["current_title"] = job["packs"][idx]["title"]
+            if job["total"] > 0 and done >= job["total"] and not processing:
+                break
+            await asyncio.sleep(1.5)
+        else:
+            job["state"] = "error"
+            job["error"] = "Install timed out. Check ComfyUI-Manager queue in the main ComfyUI window."
+            return
+        job["done"] = job["total"]
+        job["state"] = "restarting"
+        job["current_title"] = ""
+        await asyncio.sleep(0.7)
+        restart_fn()
+    except Exception as e:  # noqa: BLE001
+        job["state"] = "error"
+        job["error"] = str(e) or "Install failed."
diff --git a/movie_editor/frontend/api.js b/movie_editor/frontend/api.js
index 4725dec5..8434b374 100644
--- a/movie_editor/frontend/api.js
+++ b/movie_editor/frontend/api.js
@@ -109,6 +109,9 @@
     allNodes: () => j("GET", API("/all-nodes")),
     nodeSpec: (cls) => j("GET", API(`/node/${encodeURIComponent(cls)}`)),
     pipelinePorts: () => j("GET", API("/pipeline-ports")),
+    pipelineDeps: () => j("GET", API("/pipeline-deps")),
+    pipelineDepsInstall: (packIds) => j("POST", API("/pipeline-deps/install"), { pack_ids: packIds }),
+    pipelineDepsInstallStatus: (jobId) => j("GET", API(`/pipeline-deps/install/${encodeURIComponent(jobId)}`)),
     imageTargets: (pid) => j("GET", API("/image-targets" + (pid ? `?pid=${encodeURIComponent(pid)}` : ""))),
     // Models config is per-project; pass the project id. Falls back to the global
     // default route (used as the seed/template) when no project is given.
diff --git a/movie_editor/frontend/index.html b/movie_editor/frontend/index.html
index 9b5f3286..690429b6 100644
--- a/movie_editor/frontend/index.html
+++ b/movie_editor/frontend/index.html
@@ -102,6 +102,7 @@
 
   <script src="api.js"></script>
   <script src="dom.js"></script>
+  <script src="restart_ui.js"></script>
   <script src="pipeline_caps.js"></script>
   <script src="tour_mode.js"></script>
   <script src="view_bus.js"></script>
@@ -122,6 +123,7 @@
   <script src="engine_settings.js"></script>
   <script src="slot_picker.js"></script>
   <script src="welcome.js"></script>
+  <script src="pipeline_setup.js"></script>
   <script src="inspector.js"></script>
   <script src="rating_picker.js"></script>
   <script src="waveform.js"></script>
diff --git a/movie_editor/frontend/menubar.js b/movie_editor/frontend/menubar.js
index 7d097bf4..3941ef29 100644
--- a/movie_editor/frontend/menubar.js
+++ b/movie_editor/frontend/menubar.js
@@ -78,27 +78,11 @@
   }
 
   function _restartOverlay(message) {
-    const ov = el("div", "restart-overlay");
-    const card = el("div", "restart-card");
-    card.append(el("div", "restart-spin"));
-    const msg = el("div", "restart-msg", message);
-    card.append(msg); ov.append(card); document.body.append(ov);
-    return msg;
+    return window.FunPackRestart?.showOverlay?.(message);
   }
 
   function _waitForComfyReload(msgEl, startMs) {
-    const start = startMs || Date.now();
-    const tick = async () => {
-      try {
-        const h = await window.MovieEditorAPI.health();
-        if (h && h.ok) { location.reload(); return; }
-      } catch (_) { /* still down */ }
-      if (Date.now() - start > 90000) {
-        msgEl.textContent = "Still waiting on ComfyUI…\nIt may need a manual restart - check the console.";
-      }
-      setTimeout(tick, 2000);
-    };
-    setTimeout(tick, 3500);
+    window.FunPackRestart?.waitForReload?.(msgEl, startMs);
   }
 
   async function restartComfy() {
@@ -128,7 +112,7 @@
         ? `Updated ${res.before} → ${res.after}.\nRestarting ComfyUI…`
         : "Already up to date.\nRestarting ComfyUI…";
     } catch (e) {
-      document.querySelector(".restart-overlay")?.remove();
+      window.FunPackRestart?.removeOverlay?.();
       alert("Update failed: " + (e.message || e));
       return;
     }
@@ -163,7 +147,7 @@
             ? `Switched to ${branch} (${res.before} → ${res.after}).\nRestarting ComfyUI…`
             : `On ${branch}, already up to date.\nRestarting ComfyUI…`;
         } catch (e) {
-          document.querySelector(".restart-overlay")?.remove();
+          window.FunPackRestart?.removeOverlay?.();
           alert("Branch switch failed: " + (e.message || e));
           return;
         }
diff --git a/movie_editor/frontend/pipeline_setup.js b/movie_editor/frontend/pipeline_setup.js
new file mode 100644
index 00000000..5b55eb73
--- /dev/null
+++ b/movie_editor/frontend/pipeline_setup.js
@@ -0,0 +1,176 @@
+// Prompt to install missing custom-node packs for the built-in pipeline (via Manager).
+(function () {
+  const { el } = window.dom;
+  const S = window.Store;
+  const API = window.MovieEditorAPI;
+  const LS_KEY = "funpack_pipeline_deps_dismissed";
+
+  let overlay = null;
+  let _pollTimer = null;
+
+  function dismissed() {
+    try { return localStorage.getItem(LS_KEY) === "1"; } catch (_) { return false; }
+  }
+
+  function setDismissed() {
+    try { localStorage.setItem(LS_KEY, "1"); } catch (_) {}
+  }
+
+  function closeModal() {
+    if (_pollTimer) { clearTimeout(_pollTimer); _pollTimer = null; }
+    overlay?.remove();
+    overlay = null;
+  }
+
+  function builtInPipelineActive(st) {
+    const m = st.models || {};
+    return !m.disable_core;
+  }
+
+  async function useOwnPipeline() {
+    if (!S.get().project) return;
+    const models = JSON.parse(JSON.stringify(S.get().models || { slots: [] }));
+    models.disable_core = true;
+    await API.saveModels(S.get().project.id, models);
+    await S.loadModels();
+    setDismissed();
+    closeModal();
+  }
+
+  function packList(deps) {
+    const ul = el("ul", "pipe-setup-list");
+    (deps.missing_packs || []).forEach((p) => {
+      const li = el("li", null, p.title);
+      if (p.missing_classes?.length) {
+        li.append(el("span", "pipe-setup-sub", p.missing_classes.join(", ")));
+      }
+      ul.append(li);
+    });
+    return ul;
+  }
+
+  function manualBlock(deps) {
+    const box = el("div", "pipe-setup-manual");
+    box.append(el("div", "pipe-setup-manual-title", "Install ComfyUI-Manager or add these repos under custom_nodes:"));
+    const ul = el("ul", "pipe-setup-list");
+    (deps.manual_urls || []).forEach((u) => {
+      const li = el("li");
+      const a = el("a", null, u.title);
+      a.href = u.url;
+      a.target = "_blank";
+      a.rel = "noopener";
+      li.append(a);
+      ul.append(li);
+    });
+    box.append(ul);
+    return box;
+  }
+
+  async function pollInstall(jobId, msgEl) {
+    try {
+      const st = await API.pipelineDepsInstallStatus(jobId);
+      if (st.state === "installing" || st.state === "queued") {
+        const n = Math.min(st.done + 1, st.total || 1);
+        const title = st.current_title || "…";
+        msgEl.textContent = `Downloading and installing missing nodes:\n${n} out of ${st.total || "?"} - ${title}`;
+        _pollTimer = setTimeout(() => pollInstall(jobId, msgEl), 1200);
+        return;
+      }
+      if (st.state === "restarting") {
+        msgEl.textContent = "Install complete.\nRestarting ComfyUI…";
+        window.FunPackRestart?.waitForReload?.(msgEl, Date.now());
+        return;
+      }
+      if (st.state === "error") {
+        window.FunPackRestart?.removeOverlay?.();
+        alert(st.error || "Install failed.");
+        return;
+      }
+      _pollTimer = setTimeout(() => pollInstall(jobId, msgEl), 1200);
+    } catch (e) {
+      window.FunPackRestart?.removeOverlay?.();
+      alert(String(e.message || e));
+    }
+  }
+
+  async function startInstall(deps) {
+    const ids = (deps.missing_packs || []).map((p) => p.id);
+    if (!ids.length) return;
+    closeModal();
+    const msg = window.FunPackRestart?.showOverlay?.(
+      "Downloading and installing missing nodes:\n1 out of " + ids.length + " - " + (deps.missing_packs[0]?.title || "…"),
+    );
+    if (!msg) return;
+    try {
+      const res = await API.pipelineDepsInstall(ids);
+      pollInstall(res.job_id, msg);
+    } catch (e) {
+      window.FunPackRestart?.removeOverlay?.();
+      alert("Install failed: " + (e.message || e));
+    }
+  }
+
+  function openModal(deps) {
+    closeModal();
+    overlay = el("div", "modal-overlay pipe-setup-overlay");
+    const modal = el("div", "modal pipe-setup-modal");
+    const head = el("div", "modal-head");
+    head.append(el("div", "modal-title", "Pipeline setup"));
+    const closeBtn = el("button", "btn ghost", "Close");
+    closeBtn.type = "button";
+    closeBtn.onclick = () => closeModal();
+    const headRight = el("div", "modal-head-right");
+    headRight.append(closeBtn);
+    head.append(headRight);
+    modal.append(head);
+
+    const content = el("div", "modal-content");
+    content.append(el("p", "pipe-setup-lead",
+      "Nodes required for the built-in pipeline are missing. Do you want to install them?"));
+    content.append(packList(deps));
+    if (!deps.manager_available) {
+      content.append(el("div", "pipe-setup-warn",
+        "ComfyUI-Manager was not detected. Automatic install is unavailable."));
+      content.append(manualBlock(deps));
+    }
+    if ((deps.unmapped_classes || []).length) {
+      content.append(el("div", "pipe-setup-warn",
+        "Unmapped missing classes: " + deps.unmapped_classes.join(", ")));
+    }
+    modal.append(content);
+
+    const foot = el("div", "pipe-setup-foot");
+    if (deps.manager_available) {
+      const installBtn = el("button", "btn primary", "Install missing nodes");
+      installBtn.type = "button";
+      installBtn.onclick = () => startInstall(deps);
+      foot.append(installBtn);
+    }
+    const ownBtn = el("button", "btn", "No, I'll use my own pipeline");
+    ownBtn.type = "button";
+    ownBtn.onclick = () => useOwnPipeline();
+    foot.append(ownBtn);
+    const dismissBtn = el("button", "btn ghost", "Close");
+    dismissBtn.type = "button";
+    dismissBtn.onclick = () => closeModal();
+    foot.append(dismissBtn);
+    modal.append(foot);
+
+    overlay.append(modal);
+    overlay.addEventListener("click", (e) => { if (e.target === overlay) closeModal(); });
+    document.body.append(overlay);
+  }
+
+  async function maybePrompt() {
+    if (window.__FUNPACK_TOUR__) return;
+    if (dismissed()) return;
+    const st = S.get();
+    if (!st.project || !builtInPipelineActive(st)) return;
+    let deps;
+    try { deps = await API.pipelineDeps(); } catch (_) { return; }
+    if (!deps?.needs_install) return;
+    openModal(deps);
+  }
+
+  window.PipelineSetup = { maybePrompt, close: closeModal };
+})();
diff --git a/movie_editor/frontend/restart_ui.js b/movie_editor/frontend/restart_ui.js
new file mode 100644
index 00000000..baf86384
--- /dev/null
+++ b/movie_editor/frontend/restart_ui.js
@@ -0,0 +1,37 @@
+// Shared ComfyUI restart overlay + health polling (Update FunPack, pipeline installs).
+(function () {
+  const { el } = window.dom;
+
+  function showOverlay(message) {
+    document.querySelector(".restart-overlay")?.remove();
+    const ov = el("div", "restart-overlay");
+    const card = el("div", "restart-card");
+    card.append(el("div", "restart-spin"));
+    const msg = el("div", "restart-msg", message);
+    card.append(msg);
+    ov.append(card);
+    document.body.append(ov);
+    return msg;
+  }
+
+  function waitForReload(msgEl, startMs) {
+    const start = startMs || Date.now();
+    const tick = async () => {
+      try {
+        const h = await window.MovieEditorAPI.health();
+        if (h && h.ok) { location.reload(); return; }
+      } catch (_) { /* still down */ }
+      if (Date.now() - start > 90000) {
+        msgEl.textContent = "Still waiting on ComfyUI…\nIt may need a manual restart - check the console.";
+      }
+      setTimeout(tick, 2000);
+    };
+    setTimeout(tick, 3500);
+  }
+
+  window.FunPackRestart = {
+    showOverlay,
+    waitForReload,
+    removeOverlay() { document.querySelector(".restart-overlay")?.remove(); },
+  };
+})();
diff --git a/movie_editor/frontend/store.js b/movie_editor/frontend/store.js
index f476ce4c..cdf28c77 100644
--- a/movie_editor/frontend/store.js
+++ b/movie_editor/frontend/store.js
@@ -636,6 +636,7 @@
     await loadModels();
     _validateSceneRenders();
     window.WelcomePage?.close?.();
+    window.PipelineSetup?.maybePrompt?.();
   }
 
   async function newProject(name) {
diff --git a/movie_editor/frontend/styles.css b/movie_editor/frontend/styles.css
index 2e71d342..b1f885bc 100644
--- a/movie_editor/frontend/styles.css
+++ b/movie_editor/frontend/styles.css
@@ -1250,6 +1250,18 @@ label.field.linked input, label.field.linked select { opacity: .6; }
 /* Input-source arrow points left (← instead of →) */
 .wire-row .wire-arrow.src { color: var(--amber); }
 
+/* pipeline missing-nodes setup modal */
+.pipe-setup-modal { max-width: 520px; width: min(520px, 96vw); }
+.pipe-setup-lead { margin: 0 0 12px; color: var(--muted); font-size: 13px; line-height: 1.5; }
+.pipe-setup-list { margin: 0 0 12px; padding-left: 18px; color: var(--text); font-size: 13px; }
+.pipe-setup-list li { margin: 6px 0; }
+.pipe-setup-sub { display: block; font-size: 11px; color: var(--faint); font-family: var(--font-mono); margin-top: 2px; }
+.pipe-setup-warn { margin: 10px 0; padding: 8px 10px; border-radius: 6px; font-size: 12px; line-height: 1.45;
+  background: color-mix(in srgb, var(--amber) 10%, transparent);
+  border: 1px solid color-mix(in srgb, var(--amber) 35%, transparent); color: var(--muted); }
+.pipe-setup-manual-title { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
+.pipe-setup-foot { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 16px 16px; border-top: 1px solid var(--line); }
+
 /* restart overlay */
 .restart-overlay { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center;
   background: color-mix(in srgb, var(--ink-0) 88%, transparent); backdrop-filter: blur(3px); }
diff --git a/movie_editor/server.py b/movie_editor/server.py
index b492a8e2..0ea361ad 100644
--- a/movie_editor/server.py
+++ b/movie_editor/server.py
@@ -19,7 +19,7 @@ except Exception:  # pragma: no cover - only available inside ComfyUI
     web = None
     PromptServer = None
 
-from .backend import bridge, builder, config, git_update, media, nodes, pipeline_caps, pipeline_wiring, projects, workflow_import
+from .backend import bridge, builder, config, git_update, media, nodes, pipeline_caps, pipeline_deps, pipeline_wiring, projects, workflow_import
 from .backend.nle_effects import zoompan_z_expr
 from .backend.nle_overlays import build_overlay_video_filter, prepare_overlay_export
 from .backend.timeline import (
@@ -1710,6 +1710,38 @@ if web is not None and PromptServer is not None:
             print(f"[FunPack][movie] node-candidates({role}) failed:\n{traceback.format_exc()}")
             raise web.HTTPInternalServerError(reason=f"candidates({role}) failed: {e}")
 
+    @routes.get(UI_PREFIX + "/api/pipeline-deps")
+    async def _pipeline_deps(_req):
+        try:
+            oi = await bridge.object_info()
+        except Exception:
+            oi = {}
+        mgr = await pipeline_deps.manager_available()
+        return web.json_response(pipeline_deps.status_payload(oi, manager_available=mgr))
+
+    @routes.post(UI_PREFIX + "/api/pipeline-deps/install")
+    async def _pipeline_deps_install(req):
+        import asyncio
+        if not await pipeline_deps.manager_available():
+            return web.json_response(
+                {"detail": "ComfyUI-Manager is not installed or not reachable."},
+                status=503,
+            )
+        body = await req.json() if req.can_read_body else {}
+        pack_ids = body.get("pack_ids") or body.get("packs") or []
+        if not isinstance(pack_ids, list) or not pack_ids:
+            return web.json_response({"detail": "pack_ids required."}, status=400)
+        job = pipeline_deps.create_install_job([str(x) for x in pack_ids])
+        asyncio.create_task(pipeline_deps.run_install_job(job["job_id"], _restart_comfy))
+        return web.json_response({"job_id": job["job_id"], "total": job["total"]})
+
+    @routes.get(UI_PREFIX + "/api/pipeline-deps/install/{job_id}")
+    async def _pipeline_deps_install_status(req):
+        job = pipeline_deps.get_install_job(req.match_info["job_id"])
+        if not job:
+            raise web.HTTPNotFound(reason="Install job not found")
+        return web.json_response(job)
+
     @routes.get(UI_PREFIX + "/api/pipeline-ports")
     async def _pipeline_ports(_req):
         try:
diff --git a/movie_editor/tests/test_pipeline_deps.py b/movie_editor/tests/test_pipeline_deps.py
new file mode 100644
index 00000000..3a2be3e8
--- /dev/null
+++ b/movie_editor/tests/test_pipeline_deps.py
@@ -0,0 +1,41 @@
+"""Tests for built-in pipeline dependency detection."""
+from movie_editor.backend import pipeline_deps
+
+
+def test_no_missing_when_all_core_present():
+    oi = {cls: {} for cls in pipeline_deps.required_core_classes()}
+    assert pipeline_deps.missing_core_classes(oi) == []
+    assert pipeline_deps.missing_packs(oi) == []
+    st = pipeline_deps.status_payload(oi, manager_available=True)
+    assert st["needs_install"] is False
+
+
+def test_missing_ltx_and_vhs_packs():
+    oi = {
+        "FunPackStudio": {},
+        "FunPackLTXAVSceneChainSampler": {},
+        "FunPackSaveRefinementLatent": {},
+        "FunPackRefinementKeyLoader": {},
+        "PrimitiveStringMultiline": {},
+        "PrimitiveInt": {},
+        "PrimitiveFloat": {},
+    }
+    missing = pipeline_deps.missing_core_classes(oi)
+    assert "LTXVConditioning" in missing
+    assert "VHS_VideoCombine" in missing
+    packs = pipeline_deps.missing_packs(oi)
+    ids = {p["id"] for p in packs}
+    assert "ComfyUI-LTXVideo" in ids
+    assert "comfyui-videohelpersuite" in ids
+    st = pipeline_deps.status_payload(oi, manager_available=False)
+    assert st["needs_install"] is True
+    assert st["manager_available"] is False
+    assert len(st["manual_urls"]) >= 2
+
+
+def test_install_body_fallback_git():
+    pack = pipeline_deps._PACK_BY_ID["ComfyUI-LTXVideo"]
+    body = pipeline_deps._install_body(pack, None)
+    assert body["version"] == "unknown"
+    assert body["files"]
+    assert "github.com" in body["files"][0]