diff --git a/movie_editor/backend/timeline.py b/movie_editor/backend/timeline.py
index c71f3e90..d82d7b98 100644
--- a/movie_editor/backend/timeline.py
+++ b/movie_editor/backend/timeline.py
@@ -54,6 +54,13 @@ class Scene:
     # Forward-compat per-scene knobs (uniform values still win in V1).
     frames: Optional[int] = None
     fps: Optional[int] = None
+    # How `frames`/`fps` are resolved:
+    #   "project"  → ignore the per-scene value, use the project global.
+    #   "timeline" → use the per-scene value; the timeline trim handle writes it live.
+    #   "custom"   → use the per-scene value; the timeline trim handle is locked.
+    # Defaults: length follows the timeline (trim-derived), fps follows the project.
+    frames_mode: str = "timeline"
+    fps_mode: str = "project"
     width: Optional[int] = None
     height: Optional[int] = None
     source: SceneSource = field(default_factory=SceneSource)
@@ -71,6 +78,8 @@ class Scene:
             transition_frames=d.get("transition_frames"),
             frames=d.get("frames"),
             fps=d.get("fps"),
+            frames_mode=str(d.get("frames_mode") or "timeline"),
+            fps_mode=str(d.get("fps_mode") or "project"),
             width=d.get("width"),
             height=d.get("height"),
             source=SceneSource.from_dict(d.get("source")),
@@ -81,12 +90,26 @@ class Scene:
         d = asdict(self)
         return d
 
+    def eff_frames(self, project: "Project") -> int:
+        if self.frames_mode == "project" or self.frames is None:
+            return project.num_frames_per_scene
+        return self.frames
+
+    def eff_fps(self, project: "Project") -> int:
+        if self.fps_mode == "project" or self.fps is None:
+            return project.frame_rate
+        return self.fps
+
 
 @dataclass
 class Project:
     id: str = field(default_factory=_new_id)
     name: str = "Untitled"
     anchor: str = ""               # text prepended to every scene (character anchor)
+    # Optional master prompt in Studio combined syntax. When the user edits it and
+    # hits Apply, the editor reparses it into anchor + scenes + transitions (normal
+    # Studio behaviour). Stored verbatim so the field round-trips; not used at build.
+    global_prompt: str = ""
     negative_prompt: str = ""      # passed to the neg primitive node in the graph
     # Marker separating the anchor from the first scene (Studio needs a trigger to
     # close segments[0]=anchor). Defaults resolved at assembly from the library.
@@ -116,6 +139,7 @@ class Project:
             id=d.get("id") or _new_id(),
             name=str(d.get("name", "Untitled")),
             anchor=str(d.get("anchor", "")),
+            global_prompt=str(d.get("global_prompt", "")),
             negative_prompt=str(d.get("negative_prompt", "")),
             intro_transition=str(d.get("intro_transition", "")),
             scenes=[Scene.from_dict(s) for s in d.get("scenes", [])],
diff --git a/movie_editor/frontend/api.js b/movie_editor/frontend/api.js
index dbdf46e5..752ffee7 100644
--- a/movie_editor/frontend/api.js
+++ b/movie_editor/frontend/api.js
@@ -34,6 +34,7 @@
     // timeline preview
     preview: (id, includeExcluded) =>
       j("GET", API(`/projects/${id}/preview?include_excluded=${includeExcluded ? "true" : "false"}`)),
+    parsePrompt: (id, prompt) => j("POST", API(`/projects/${id}/parse`), { prompt }),
 
     // libraries
     transitions: () => j("GET", API("/library/transitions")),
diff --git a/movie_editor/frontend/inspector.js b/movie_editor/frontend/inspector.js
index 202e1587..7632f6da 100644
--- a/movie_editor/frontend/inspector.js
+++ b/movie_editor/frontend/inspector.js
@@ -98,6 +98,50 @@
     body.append(field("Feeds node input", tgt));
   }
 
+  // Per-scene length / fps with a 3-way mode (project | timeline | custom).
+  const LEN_META = {
+    frames: { label: "Frames", projKey: "num_frames_per_scene", snap: (v) => S.snapFrames(v) },
+    fps:    { label: "FPS",    projKey: "frame_rate",          snap: (v) => Math.max(1, v) },
+  };
+  const LEN_DEFAULT_MODE = { frames: "timeline", fps: "project" };
+
+  function modeOf(scene, kind) { return scene[kind + "_mode"] || LEN_DEFAULT_MODE[kind]; }
+  function effOf(scene, kind) {
+    const m = LEN_META[kind], p = S.get().project;
+    return modeOf(scene, kind) !== "project" && scene[kind] != null ? scene[kind] : p[m.projKey];
+  }
+
+  function lengthControl(scene, kind) {
+    const m = LEN_META[kind], p = S.get().project;
+    const mode = modeOf(scene, kind);
+    const wrap = el("label", "field");
+    wrap.append(el("span", null, m.label));
+
+    const sel = el("select"); sel.dataset.k = "sc-" + kind + "mode";
+    [["project", "Inherit project global"], ["timeline", "Inherit timeline (trim)"], ["custom", "Custom"]]
+      .forEach(([v, l]) => { const o = el("option", null, l); o.value = v; if (v === mode) o.selected = true; sel.append(o); });
+    sel.onchange = () => {
+      const patch = { [kind + "_mode"]: sel.value };
+      // Seed the per-scene value from the current effective value when leaving "project".
+      if (sel.value !== "project" && scene[kind] == null) patch[kind] = effOf(scene, kind);
+      S.patchScene(scene.id, patch);
+    };
+    wrap.append(sel);
+
+    if (mode === "custom") {
+      const i = el("input"); i.type = "number"; i.value = effOf(scene, kind); i.dataset.k = "sc-" + kind;
+      i.oninput = () => S.patchSceneQuiet(scene.id, { [kind]: m.snap(parseInt(i.value || "0", 10)) });
+      wrap.append(i);
+    } else {
+      const note = el("div", "len-readout");
+      note.textContent = mode === "project"
+        ? `${p[m.projKey]} · from project`
+        : `${effOf(scene, kind)} · from timeline`;
+      wrap.append(note);
+    }
+    return wrap;
+  }
+
   function renderScene(st, scene) {
     title.textContent = `Scene · ${st.project.scenes.indexOf(scene) + 1}`;
     const tag = el("div", "insp-tag"); tag.textContent = "Clip properties"; body.append(tag);
@@ -118,13 +162,12 @@
       (v) => S.patchScene(scene.id, { transition_to_next: v }))));
 
     const p = st.project;
-    const frames = scene.frames != null ? scene.frames : p.num_frames_per_scene;
-    const fps = scene.fps != null ? scene.fps : p.frame_rate;
     const lenRow = el("div", "fields-row");
-    lenRow.append(numberField("Frames", frames, (v) => S.patchSceneQuiet(scene.id, { frames: S.snapFrames(v) }), "sc-frames"));
-    lenRow.append(numberField("FPS", fps, (v) => S.patchSceneQuiet(scene.id, { fps: Math.max(1, v) }), "sc-fps"));
+    lenRow.append(lengthControl(scene, "frames"));
+    lenRow.append(lengthControl(scene, "fps"));
     body.append(lenRow);
-    body.append(el("div", "insp-hint", `Duration ≈ ${(frames / (fps || 1)).toFixed(2)}s${scene.frames == null ? "  ·  inheriting project length" : ""}`));
+    const effFrames = effOf(scene, "frames"), effFps = effOf(scene, "fps") || 1;
+    body.append(el("div", "insp-hint", `Duration ≈ ${(effFrames / effFps).toFixed(2)}s`));
 
     const row = el("div", "insp-block");
     const chk = el("label", "chk"); const cb = el("input"); cb.type = "checkbox"; cb.checked = !!scene.excluded;
@@ -350,6 +393,56 @@
     body.append(wrap);
   }
 
+  // Pinned global-prompt editor (always on top). Backed by the live combined prompt
+  // so editing any scene flows into it; `gpDraft` holds unapplied direct edits.
+  let gpDraft = null;
+  let gpProjectId = null;
+  function renderGlobalPrompt(st) {
+    if (st.project.id !== gpProjectId) { gpProjectId = st.project.id; gpDraft = null; }  // drop stale edits on project switch
+    const live = (st.preview && st.preview.combined_prompt) || st.project.global_prompt || "";
+    const dirty = gpDraft != null && gpDraft !== live;
+    const val = gpDraft != null ? gpDraft : live;
+
+    const sec = el("div", "insp-global");
+    const head = el("div", "insp-global-head");
+    head.append(el("span", "insp-global-title", "Global prompt"));
+    const apply = el("button", "btn primary tiny", "Apply →");
+    apply.title = "Reparse this prompt into anchor, scenes and transitions (overwrites the timeline)";
+    apply.disabled = !dirty;
+    apply.onclick = async () => {
+      apply.disabled = true; apply.textContent = "Applying…";
+      await S.applyGlobalPrompt(gpDraft != null ? gpDraft : live);
+      gpDraft = null;
+      S.set({});  // re-render so the field returns to its live view
+    };
+    head.append(apply);
+    sec.append(head);
+
+    const ta = el("textarea", "insp-global-ta"); ta.rows = 3; ta.value = val; ta.dataset.k = "global-prompt";
+    ta.placeholder = "Anchor, then scene texts joined by transition markers — the whole montage as one prompt.";
+    ta.oninput = () => { gpDraft = ta.value; apply.disabled = (gpDraft === live); };
+    sec.append(ta);
+    sec.append(el("div", "insp-hint", dirty
+      ? "Edited — press Apply to rebuild the timeline from this prompt."
+      : "Live view of the assembled prompt. Edit a scene below and it updates here; edit here + Apply to rewrite scenes."));
+    body.append(sec);
+  }
+
+  function renderSwitch(st, scene) {
+    const sw = el("div", "insp-switch");
+    const mk = (label, active, on, disabled) => {
+      const b = el("button", "insp-seg" + (active ? " active" : ""), label);
+      if (disabled) b.disabled = true; else b.onclick = on;
+      return b;
+    };
+    sw.append(mk("Project", !scene, () => S.selectScene(null)));
+    sw.append(mk("Scene", !!scene, () => {
+      const id = st.selectedSceneId || (st.project.scenes[0] && st.project.scenes[0].id);
+      if (id) S.selectScene(id);
+    }, !st.project.scenes.length));
+    body.append(sw);
+  }
+
   function render(st) {
     // preserve focus + caret of a text/number field across the rebuild (autosave-safe)
     const a = document.activeElement;
@@ -360,6 +453,8 @@
     clear(body);
     if (!st.project) { title.textContent = "Inspector"; body.append(el("div", "pj-meta", "No project open.")); return; }
     const scene = st.selectedSceneId ? S.scene(st.selectedSceneId) : null;
+    renderGlobalPrompt(st);
+    renderSwitch(st, scene);
     if (scene) renderScene(st, scene); else renderProject(st);
     renderExposed(st);
     renderSplit(st);
diff --git a/movie_editor/frontend/menubar.js b/movie_editor/frontend/menubar.js
index 5b9ef2d6..5094196b 100644
--- a/movie_editor/frontend/menubar.js
+++ b/movie_editor/frontend/menubar.js
@@ -80,7 +80,6 @@
         { label: `Sampler: ${_roleLabel(st.project?.sampler_slot, "FunPack Chain Sampler")}`, disabled: !hasProject(),
           action: () => _pickRole("sampler_slot", "Sampler node", st) },
         { sep: true },
-        { label: "Project Settings", disabled: !hasProject(), action: () => S.selectScene(null) },
         { label: "Render / Export…", soon: true, disabled: true },
       ],
       Models: [
diff --git a/movie_editor/frontend/models.js b/movie_editor/frontend/models.js
index a27da420..ba03fe8c 100644
--- a/movie_editor/frontend/models.js
+++ b/movie_editor/frontend/models.js
@@ -569,7 +569,7 @@
       const x = el("button", "chip-x", "✕"); x.title = "Remove from link";
       x.onclick = async () => {
         link.members = (link.members || []).filter((mm) => !(mm.slotId === m.slotId && mm.input === m.input));
-        if (link.members.length < 2) config.links = (config.links || []).filter((l) => l.id !== link.id);
+        if (link.members.length < 1) config.links = (config.links || []).filter((l) => l.id !== link.id);
         await persist(); render();
       };
       chip.append(x); mem.append(chip);
@@ -589,9 +589,9 @@
       right.append(b);
     } else {
       const save = el("button", "btn primary tiny", `Save link (${linkSel.length})`);
-      save.disabled = linkSel.length < 2;
+      save.disabled = linkSel.length < 1;
       save.onclick = async () => {
-        if (linkSel.length < 2) return;
+        if (linkSel.length < 1) return;
         const def = "size " + ((config.links || []).length + 1);
         const nm = prompt("Link name:", def); if (nm == null) return;
         const first = linkSel[0]; const s0 = slotById(first.slotId);
@@ -609,10 +609,10 @@
     }
     head.append(right);
     sec.append(head);
-    if (linkMode) sec.append(el("div", "links-hint", "Click ＋ next to any input below to add it to the link, then Save. (Pick 2+ inputs.)"));
+    if (linkMode) sec.append(el("div", "links-hint", "Click ＋ next to any input below to add it to the link, then Save. Pick a single input to tie it to a project value (e.g. FPS), or several to drive them together."));
     (config.links || []).forEach((l) => sec.append(linkCard(l)));
     if (!linkMode && !(config.links || []).length)
-      sec.append(el("div", "links-empty", "No links yet. Use 'Link inputs' to drive several node inputs (e.g. width/height) from one control."));
+      sec.append(el("div", "links-empty", "No links yet. Use 'Link inputs' to bind a node input to a project value (e.g. tie a loader's FPS to Project · FPS), or to drive several inputs from one control."));
     return sec;
   }
 
diff --git a/movie_editor/frontend/player.js b/movie_editor/frontend/player.js
index 6e447918..a07e0fdb 100644
--- a/movie_editor/frontend/player.js
+++ b/movie_editor/frontend/player.js
@@ -35,8 +35,8 @@
   function _buildSegs(st) {
     if (!st.project) return [];
     const p = st.project;
-    const sFps = (sc) => (sc.fps != null ? sc.fps : p.frame_rate) || 25;
-    const sFrames = (sc) => (sc.frames != null ? sc.frames : p.num_frames_per_scene) || 1;
+    const sFps = (sc) => ((sc.fps_mode !== "project" && sc.fps != null) ? sc.fps : p.frame_rate) || 25;
+    const sFrames = (sc) => ((sc.frames_mode !== "project" && sc.frames != null) ? sc.frames : p.num_frames_per_scene) || 1;
 
     // Map sceneId → timeline start time
     const startOf = {};
@@ -294,8 +294,8 @@
     _fpsCur = p?.frame_rate || 25;
 
     // Compute total duration
-    const sFps = (sc) => (sc.fps != null ? sc.fps : _fpsCur) || 25;
-    const sFrames = (sc) => (sc.frames != null ? sc.frames : p?.num_frames_per_scene || 1) || 1;
+    const sFps = (sc) => ((sc.fps_mode !== "project" && sc.fps != null) ? sc.fps : _fpsCur) || 25;
+    const sFrames = (sc) => ((sc.frames_mode !== "project" && sc.frames != null) ? sc.frames : p?.num_frames_per_scene || 1) || 1;
     _totalSecCur = 0;
     for (const sc of (p?.scenes || [])) _totalSecCur += sFrames(sc) / sFps(sc);
 
diff --git a/movie_editor/frontend/store.js b/movie_editor/frontend/store.js
index a7476f5a..cf374dd9 100644
--- a/movie_editor/frontend/store.js
+++ b/movie_editor/frontend/store.js
@@ -172,8 +172,11 @@
   function resizeScene(id, durationSec) {
     if (!state.project) return;
     const s = scene(id); if (!s) return;
-    const fps = s.fps != null ? s.fps : state.project.frame_rate;
+    if (s.frames_mode === "custom") return;  // custom length is locked against trim
+    const fps = (s.fps_mode !== "project" && s.fps != null) ? s.fps : state.project.frame_rate;
     s.frames = snapFrames(Math.max(1, durationSec) * fps);
+    // Dragging the trim handle opts the scene into timeline-driven length.
+    if (s.frames_mode == null || s.frames_mode === "project") s.frames_mode = "timeline";
     scheduleSaveSilent();
   }
 
@@ -243,6 +246,38 @@
     scheduleSave();
   }
 
+  // ── global prompt → distribute into anchor / scenes / transitions ──────────────
+  // Reparses a master prompt (Studio combined syntax) and rebuilds the timeline:
+  // anchor + one scene per parsed segment + transitions matched from the library.
+  // Existing per-scene source / length settings are carried over by index.
+  async function applyGlobalPrompt(text) {
+    if (!state.project) return;
+    state.project.global_prompt = text;
+    let parsed;
+    try { parsed = (await API.parsePrompt(state.project.id, text)).parsed; }
+    catch (e) { alert("Could not parse the global prompt: " + e.message); return; }
+    if (!parsed || !(parsed.scenes || []).length) { alert("Nothing parsed — no scenes detected."); return; }
+
+    if (parsed.anchor != null) state.project.anchor = parsed.anchor;
+    const old = state.project.scenes || [];
+    const next = (parsed.scenes || []).map((ps, i) => {
+      const base = old[i] ? JSON.parse(JSON.stringify(old[i])) : { source: { type: "empty" }, excluded: false };
+      base.text = ps.text || "";
+      base.transition_to_next = "";
+      return base;
+    });
+    (parsed.transitions || []).forEach((t) => {
+      const idx = t.after_scene;
+      if (idx >= 0 && idx < next.length && t.visual_effect) {
+        const lib = (state.transitions || []).find((tr) => (tr.visual_effect || "none") === t.visual_effect);
+        if (lib) next[idx].transition_to_next = lib.trigger || lib.name || "";
+      }
+    });
+    state.project.scenes = next;
+    state.selectedSceneId = null;  // show project view so the result is visible
+    notify(); scheduleSave();
+  }
+
   // ── preview ──────────────────────────────────────────────────────────────────
   let previewTimer = null;
   function refreshPreview() {
@@ -440,7 +475,7 @@
     refreshProjectList, loadProject, newProject, deleteProject, downloadProject, importProject,
     patchProject, patchProjectQuiet, patchScene, patchSceneQuiet, selectScene, addScene, removeScene, moveScene, scene,
     resizeScene, splitScene, snapFrames,
-    refreshPreview, syncFromPreview, generate, loadModels, loadImageTargets, setModelInput, setModelLink,
+    refreshPreview, syncFromPreview, applyGlobalPrompt, generate, loadModels, loadImageTargets, setModelInput, setModelLink,
     setConditioningSlot, setSamplerSlot, setSamplerInput, setSamplerInputNow, setStudioInput, setStudioInputNow,
     loadMedia, uploadMedia, deleteMedia, assignMediaToScene,
     loadShortcuts, saveShortcut, deleteShortcut, importShortcuts, loadTransitions, saveTransition, deleteTransition, importTransitions,
diff --git a/movie_editor/frontend/styles.css b/movie_editor/frontend/styles.css
index 3f74f779..5b6779a3 100644
--- a/movie_editor/frontend/styles.css
+++ b/movie_editor/frontend/styles.css
@@ -266,6 +266,33 @@ input[type=number] { font-family: var(--font-mono); }
 .insp-tag { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 1px; color: var(--amber); text-transform: uppercase; }
 .insp-hint { font-size: 11px; color: var(--faint); margin: -4px 0 12px; }
 .insp-block { margin-bottom: 16px; }
+
+/* pinned global prompt */
+.insp-global { position: sticky; top: 0; z-index: 5; margin: -2px -2px 14px; padding: 10px 10px 8px;
+  background: linear-gradient(var(--ink-2), var(--ink-1)); border: 1px solid var(--line); border-radius: 9px;
+  box-shadow: 0 6px 14px -10px #000; }
+.insp-global-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
+.insp-global-title { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 1px; text-transform: uppercase; color: var(--amber); }
+.insp-global-ta { width: 100%; background: var(--ink-0); border: 1px solid var(--line); border-radius: 7px;
+  color: var(--ink-text, #e9e2d2); font-size: 12.5px; padding: 7px 8px; resize: vertical; font-family: var(--font-mono); line-height: 1.45; }
+.insp-global .insp-hint { margin: 6px 0 0; }
+
+/* project / scene switch */
+.insp-switch { display: flex; gap: 0; margin-bottom: 14px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
+.insp-seg { flex: 1; background: var(--ink-1); border: none; color: var(--muted); padding: 7px 0; cursor: pointer;
+  font-family: var(--font-mono); font-size: 11px; letter-spacing: 1px; text-transform: uppercase; transition: background .12s, color .12s; }
+.insp-seg + .insp-seg { border-left: 1px solid var(--line); }
+.insp-seg:hover:not(:disabled) { background: var(--ink-3); color: var(--amber-2); }
+.insp-seg.active { background: var(--amber-soft); color: var(--amber-2); }
+.insp-seg:disabled { opacity: .4; cursor: default; }
+
+/* read-only length/fps value when inheriting */
+.len-readout { font-family: var(--font-mono); font-size: 12px; color: var(--muted); padding: 6px 8px;
+  background: var(--ink-0); border: 1px dashed var(--line); border-radius: 7px; }
+
+/* locked trim handle (scene length is Custom) */
+.clip-trim.locked { cursor: not-allowed; }
+.clip-trim.locked::after { opacity: 1; background: var(--amber); height: 14px; }
 .chk { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--muted); cursor: pointer; }
 .chk input { width: auto; }
 .split-pv { background: var(--ink-0); border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
diff --git a/movie_editor/frontend/timeline.js b/movie_editor/frontend/timeline.js
index 50e31fe6..4c0da144 100644
--- a/movie_editor/frontend/timeline.js
+++ b/movie_editor/frontend/timeline.js
@@ -21,8 +21,8 @@
   let tlFps = 25;
 
   // ── helpers ──────────────────────────────────────────────────────────────────
-  const sFps = (sc, p) => (sc.fps != null ? sc.fps : p.frame_rate) || 25;
-  const sFrames = (sc, p) => (sc.frames != null ? sc.frames : p.num_frames_per_scene) || 1;
+  const sFps = (sc, p) => ((sc.fps_mode !== "project" && sc.fps != null) ? sc.fps : p.frame_rate) || 25;
+  const sFrames = (sc, p) => ((sc.frames_mode !== "project" && sc.frames != null) ? sc.frames : p.num_frames_per_scene) || 1;
   const sDur = (sc, p) => sFrames(sc, p) / sFps(sc, p);
 
   const p2 = (n) => String(n).padStart(2, "0");
@@ -118,10 +118,15 @@
     actions.append(mk("✕", "Delete clip", "danger", () => S.removeScene(scene.id)));
     clip.append(actions);
 
-    // right-edge trim → new duration → frames recomputed (duration × fps)
-    const handle = el("div", "clip-trim");
-    handle.title = "Drag to trim · length = duration × fps";
+    // right-edge trim → new duration → frames recomputed (duration × fps).
+    // Locked when length is "custom" (the inspector value wins over the timeline).
+    const locked = scene.frames_mode === "custom";
+    const handle = el("div", "clip-trim" + (locked ? " locked" : ""));
+    handle.title = locked
+      ? "Length is Custom — change it in the inspector (set Frames to Inherit timeline to trim here)"
+      : "Drag to trim · length = duration × fps";
     const baseDur = sDur(scene, p);
+    if (locked) { clip.append(handle); return clip; }
     handle.addEventListener("mousedown", (e) => {
       clip.classList.add("trimming");
       const tip = el("div", "trim-tip"); clip.append(tip);
diff --git a/movie_editor/server.py b/movie_editor/server.py
index cfc175ac..1566f471 100644
--- a/movie_editor/server.py
+++ b/movie_editor/server.py
@@ -235,6 +235,18 @@ if web is not None and PromptServer is not None:
             result["parse_error"] = str(e)
         return web.json_response(result)
 
+    # --- API: parse an arbitrary prompt (global-prompt → anchor/scenes/transitions) ---
+    @routes.post(UI_PREFIX + "/api/projects/{pid}/parse")
+    async def _parse(req):
+        p = _project_or_404(req.match_info["pid"])
+        body = await req.json() if req.can_read_body else {}
+        prompt = str(body.get("prompt", ""))
+        try:
+            parsed = bridge.parse_timeline(prompt, seed=p.seed)
+            return web.json_response({"parsed": parsed, "combined_prompt": prompt})
+        except Exception as e:  # noqa: BLE001
+            return web.json_response({"detail": f"Parse failed: {e}"}, status=502)
+
     # --- API: library (shortcuts + transitions, FunPack in-process) ---
     @routes.get(UI_PREFIX + "/api/library/transitions")
     async def _transitions(_req):
@@ -375,7 +387,11 @@ if web is not None and PromptServer is not None:
         # This makes the timeline trim handle actually affect generation length,
         # provided the user has linked EmptyLTXVLatent.num_frames → Project Frames
         # in Models → Linked inputs.
-        trimmed = [s.frames for s in active_scenes if s.frames is not None]
+        trimmed = [
+            s.eff_frames(target)
+            for s in active_scenes
+            if s.frames_mode != "project" and s.frames is not None
+        ]
         effective_frames = (
             trimmed[0]
             if trimmed and all(f == trimmed[0] for f in trimmed)