feat(npcs): drop binding; select NPCs on storyline export

Remove storyline/scene NPC binding and export chosen NPCs with relations/groups. Harden export modal so a missing npcs payload no longer blacks out the editor.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/main/project/zipStore.ts

@@ -39,7 +39,6 @@ import type {
   MaterialLegend,
   MediaAsset,
   MediaAssetType,
-  NpcBinding,
   Project,
   ProjectId,
   ProjectNpc,
@@ -66,12 +65,6 @@ import {
   asNpcRelationId,
   asProjectId,
 } from '../../shared/types/ids';
-import {
-  clearNpcBindingsForDeletedScene,
-  clearNpcBindingsForRemovedStoryline,
-  noneBinding,
-  normalizeNpcBinding,
-} from '../../shared/npcs/npcBinding';
 import {
   DEFAULT_NPC_GROUP_COLOR,
   normalizeHexColor,
@@ -712,25 +705,9 @@ export class ZipProjectStore {
         currentSceneId = ids[0] ?? null;
       }
 
-      const removedSideStarts = p.sceneGraphNodes.filter(
-        (n) => n.sceneId === sceneId && n.isSideStoryStart,
-      );
-      let npcs = clearNpcBindingsForDeletedScene(p.npcs ?? [], sceneId);
-      for (const side of removedSideStarts) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, {
-          kind: 'side',
-          startGraphNodeId: side.id,
-        });
-      }
-      const hadMainOnScene = p.sceneGraphNodes.some((n) => n.sceneId === sceneId && n.isStartScene);
-      if (hadMainOnScene) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, { kind: 'main' });
-      }
-
       return {
         ...withGraph,
         scenes: nextScenes,
-        npcs,
         sceneListOrder: removeFromSceneListOrder(
           reconcileSceneListOrder(withGraph.scenes, p.sceneListOrder),
           sceneId,
@@ -792,25 +769,9 @@ export class ZipProjectStore {
     if (graphNodeId !== null && !open.project.sceneGraphNodes.some((n) => n.id === graphNodeId)) {
       throw new Error('Graph node not found');
     }
-    const prevMain = open.project.sceneGraphNodes.find((n) => n.isStartScene);
-    const clearingMain = graphNodeId === null || (prevMain && prevMain.id !== graphNodeId);
     await this.updateProject((p) => {
-      let npcs = p.npcs ?? [];
-      if (clearingMain && prevMain) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, { kind: 'main' });
-      }
-      const demotedSides = p.sceneGraphNodes.filter(
-        (n) => n.isSideStoryStart && graphNodeId !== null && n.id === graphNodeId,
-      );
-      for (const side of demotedSides) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, {
-          kind: 'side',
-          startGraphNodeId: side.id,
-        });
-      }
       return {
         ...p,
-        npcs,
         sceneGraphNodes: p.sceneGraphNodes.map((n) => {
           const isMain = graphNodeId !== null && n.id === graphNodeId;
           if (isMain) {
@@ -841,19 +802,8 @@ export class ZipProjectStore {
       return open.project;
     }
     await this.updateProject((p) => {
-      let npcs = p.npcs ?? [];
-      if (!enabling) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, {
-          kind: 'side',
-          startGraphNodeId: graphNodeId,
-        });
-      }
-      if (enabling && node.isStartScene) {
-        npcs = clearNpcBindingsForRemovedStoryline(npcs, { kind: 'main' });
-      }
       return {
         ...p,
-        npcs,
         sceneGraphNodes: p.sceneGraphNodes.map((n) => {
           if (n.id !== graphNodeId) return n;
           if (enabling) {
@@ -916,23 +866,7 @@ export class ZipProjectStore {
         await this.updateProject((p) => {
           const withGraph = { ...p, sceneGraphNodes: nextNodes, sceneGraphEdges: nextEdges };
           const out = recomputeOutgoing(withGraph.sceneGraphNodes, withGraph.sceneGraphEdges);
-          const npcs = (p.npcs ?? []).map((n) => {
-            if (
-              n.binding?.kind === 'storyline' &&
-              n.binding.storyline.kind === 'side' &&
-              n.binding.storyline.startGraphNodeId === nodeId
-            ) {
-              return {
-                ...n,
-                binding: {
-                  kind: 'storyline' as const,
-                  storyline: { kind: 'side' as const, startGraphNodeId: newStartId },
-                },
-              };
-            }
-            return n;
-          });
-          return { ...withGraph, npcs, scenes: applyConnectionSets(withGraph.scenes, out) };
+          return { ...withGraph, scenes: applyConnectionSets(withGraph.scenes, out) };
         });
         const latest = this.getOpenProject();
         if (!latest) throw new Error('No open project');
@@ -1309,7 +1243,6 @@ export class ZipProjectStore {
       description?: string;
       filePath?: string;
       groupId?: NpcGroupId | null;
-      binding?: NpcBinding;
     },
     onProgress?: (p: { percent: number; stage: string; detail?: string }) => void,
   ): Promise<Project> {
@@ -1384,7 +1317,6 @@ export class ZipProjectStore {
           description:
             typeof input.description === 'string' ? input.description : prev.description,
           groupId: resolveGroup(input.groupId, prev.groupId),
-          binding: input.binding !== undefined ? input.binding : prev.binding,
         };
       } else {
         if (!nextAssetId) throw new Error('NPC avatar is required');
@@ -1397,7 +1329,6 @@ export class ZipProjectStore {
           x: 80 + (count % 4) * 220,
           y: 80 + Math.floor(count / 4) * 200,
           groupId: resolveGroup(input.groupId, null),
-          binding: input.binding ?? noneBinding(),
         });
       }
       return { ...p, assets, npcs };
@@ -1415,7 +1346,6 @@ export class ZipProjectStore {
       name?: string;
       description?: string;
       groupId?: NpcGroupId | null;
-      binding?: NpcBinding;
     },
   ): Promise<Project> {
     const open = this.openProject;
@@ -1447,7 +1377,6 @@ export class ZipProjectStore {
           ...(name !== undefined ? { name } : {}),
           ...(typeof patch.description === 'string' ? { description: patch.description } : {}),
           groupId,
-          ...(patch.binding !== undefined ? { binding: patch.binding } : {}),
         };
       });
       return { ...p, npcs };
@@ -2000,10 +1929,13 @@ export class ZipProjectStore {
   async getProjectStorylines(
     projectId: ProjectId,
     labels: StorylineLabels,
-  ): Promise<StorylineListItem[]> {
+  ): Promise<{ storylines: StorylineListItem[]; npcs: { id: string; name: string }[] }> {
     const snap = await this.loadProjectSnapshot(projectId);
     try {
-      return listExportableStorylines(snap.project, labels);
+      return {
+        storylines: listExportableStorylines(snap.project, labels),
+        npcs: (snap.project.npcs ?? []).map((n) => ({ id: n.id, name: n.name })),
+      };
     } finally {
       if (snap.ownsCache) {
         await fs.rm(snap.cacheDir, { recursive: true, force: true }).catch(() => undefined);
@@ -2014,6 +1946,7 @@ export class ZipProjectStore {
   async exportStorylinesZipToPath(
     projectId: ProjectId,
     selections: StorylineSelection[],
+    npcIds: string[],
     destinationPath: string,
     labels: StorylineLabels,
     onProgress?: (p: { stage: 'zip' | 'done'; percent: number; detail?: string }) => void,
@@ -2030,6 +1963,7 @@ export class ZipProjectStore {
         newProjectId: newExportBundleProjectId(),
         exportTitle: entry?.name ?? snap.project.meta.name,
         labels,
+        npcIds,
       });
       await fs.mkdir(path.join(exportCache, 'assets'), { recursive: true });
       const assetIds = Object.keys(partial.assets) as AssetId[];
@@ -2483,11 +2417,6 @@ function normalizeProject(p: Project): Project {
     );
   const npcGroups = normalizeNpcGroups((p as unknown as { npcGroups?: unknown }).npcGroups);
   const groupIdSet = new Set(npcGroups.map((g) => g.id));
-  const sceneIdSet = new Set(Object.keys(scenes) as SceneId[]);
-  const sideStartIds = new Set(
-    sceneGraphNodes.filter((n) => n.isSideStoryStart).map((n) => n.id),
-  );
-  const hasMainStart = sceneGraphNodes.some((n) => n.isStartScene);
   const rawNpcs = (p as unknown as { npcs?: unknown[] }).npcs;
   const npcs: ProjectNpc[] = (Array.isArray(rawNpcs) ? rawNpcs : [])
     .map((n, index) => {
@@ -2500,7 +2429,6 @@ function normalizeProject(p: Project): Project {
         x?: number;
         y?: number;
         groupId?: string | null;
-        binding?: unknown;
       };
       if (!obj.id || !obj.avatarAssetId || typeof obj.name !== 'string') return null;
       const name = obj.name.trim();
@@ -2516,11 +2444,6 @@ function normalizeProject(p: Project): Project {
         x,
         y,
         groupId: resolveNpcGroupId(obj.groupId, groupIdSet),
-        binding: normalizeNpcBinding(obj.binding, {
-          sceneIds: sceneIdSet,
-          sideStartIds,
-          hasMainStart,
-        }),
       };
     })
     .filter((x): x is ProjectNpc => Boolean(x));